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Rapid Synthesis of Honeycomb-Structured FeP2@NHC for High-Rate and Durable Lithium Storage 快速合成蜂窝状结构FeP2@NHC用于高速率和耐用锂储存
4区 工程技术
Energies Pub Date : 2025-03-10 DOI: 10.3390/en18061358
Junjie Shao, Xiaodong Wang, Houhua Ceng, Lan Hu, Zhean Su
{"title":"Rapid Synthesis of Honeycomb-Structured FeP2@NHC for High-Rate and Durable Lithium Storage","authors":"Junjie Shao, Xiaodong Wang, Houhua Ceng, Lan Hu, Zhean Su","doi":"10.3390/en18061358","DOIUrl":"https://doi.org/10.3390/en18061358","url":null,"abstract":"The concurrent preservation of structural integrity and improvement of electrical conductivity in FeP2 anodes presents a persistent challenge. Herein, FeP2 nanoparticles embedded within a 3D N-doped honeycomb-like carbon framework composite (FeP2@NHC) are synthesized through a phosphorization process with a honeycomb-like Fe3C@NHC as a precursor. The in situ incorporation of FeP2 nanoparticles into the 3D carbon matrix effectively restrains the aggregation, pulverization, and stripping of material during cycling, and significantly enhances reaction kinetics and structural stability, achieving a superior electrochemical performance. Specifically, FeP2@NHC electrodes demonstrate remarkable reversible capacity (1433.9 mA h g−1 at 0.1 A g−1), excellent rate-capability (399.9 mA h g−1 at 10 A g−1), and ultra-long cycle life (631.5 mA h g−1 after 1000 cycles at 2 A g−1). Moreover, XRD analysis reveals that iron-rich Fe3C and Fe3O4 precursors can react with NaH2PO2 to form FeP2 and FeP, respectively. This study offers a rational and practical strategy for designing other phosphorus-rich metal phosphide anode materials.","PeriodicalId":11557,"journal":{"name":"Energies","volume":"18 6","pages":"1358-1358"},"PeriodicalIF":0.0,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/1996-1073/18/6/1358/pdf?version=1741660232","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of Component Interactions During the Hydrothermal Process Using a Mixed-Model Cellulose/Hemicellulose/Lignin/Protein and Real Cotton Stalk 用纤维素/半纤维素/木质素/蛋白质和真棉秸秆混合模型研究水热过程中组分相互作用
4区 工程技术
Energies Pub Date : 2025-03-06 DOI: 10.3390/en18051290
Shengjun Guo, Jiachen Zuo, Xiao Yang, Hui Wang, Lihua Cheng, Libo Zhang
{"title":"Investigation of Component Interactions During the Hydrothermal Process Using a Mixed-Model Cellulose/Hemicellulose/Lignin/Protein and Real Cotton Stalk","authors":"Shengjun Guo, Jiachen Zuo, Xiao Yang, Hui Wang, Lihua Cheng, Libo Zhang","doi":"10.3390/en18051290","DOIUrl":"https://doi.org/10.3390/en18051290","url":null,"abstract":"Converting agricultural and forestry waste into high-value-added bio-oil via hydrothermal liquefaction (HTL) reduces incineration pollution and alleviates fuel oil shortages. Current research focuses on adjusting HTL parameters like temperature, time, catalyst, and pretreatment. Few studies explore raw material composition and its interactions with bio-oil properties, limiting guidance for future multi-material hydrothermal co-liquefaction. In view of the above problems, the lignocellulosic model in this paper used cellulose, hemicellulose, lignin, and protein as raw materials. At a low hydrothermal temperature (220 °C), the yield and properties of hydrothermal bio-oil were used as indicators to explore the influence of the proportional content of different model components on the interaction in the hydrothermal process through its simple binary blending and multivariate blending. Then, compared with the hydrothermal liquefaction process of cotton stalk, the interaction between components in the hydrothermal process of real lignocellulose was explored. The results demonstrated significant interactions among cellulose, lignin, and hemicellulose in cotton stalks. The relative strength of component interactions was ranked by yield (wt.%) and property modulation as follows: cellulose–lignin (C-L, 6.82%, synergistic enhancement) > cellulose–hemicellulose (C-X, 1.83%, inhibitory effect) > hemicellulose–lignin (X-L, 1.32%, non-significant interaction). Glycine supplementation enhanced bio-oil yields, with the most pronounced effect observed in cellulose–glycine (C-G) systems, where hydrothermal bio-oil yield increased from 2.29% to 4.59%. Aqueous-phase bio-oil exhibited superior high heating values (HHVs), particularly in hemicellulose–glycine (X-G) blends, which achieved the maximum HHV of 29.364 MJ/kg among all groups. Meanwhile, the characterization results of hydrothermal bio-oil under different mixing conditions showed that the proportion of model components largely determined the composition and properties of hydrothermal bio-oil, which can be used as a regulation method for the synthesis of directional chemicals. Cellulose–lignin (C-L) interactions demonstrated the strongest synergistic enhancement, reaching maximum efficacy at a 3:1 mass ratio. This study will deepen the understanding of the composition of lignocellulose raw materials in the hydrothermal process, promote the establishment of a hydrothermal product model of lignocellulose, and improve the yield of bio-oil.","PeriodicalId":11557,"journal":{"name":"Energies","volume":"18 5","pages":"1290-1290"},"PeriodicalIF":0.0,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/1996-1073/18/5/1290/pdf?version=1741255451","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147886657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
The Influence of Tri-Structural Isotropic Fuel on the Microstructure and Thermal Conductivity of SiC Tri-Structural Isotropic Composite Fuels 三结构各向同性燃料对SiC三结构各向同性复合燃料微观结构和导热性的影响
4区 工程技术
Energies Pub Date : 2025-03-02 DOI: 10.3390/en18051216
Xiaojiao Wang, Libing Zhu, Yan You, Zhaoquan Zhang
{"title":"The Influence of Tri-Structural Isotropic Fuel on the Microstructure and Thermal Conductivity of SiC Tri-Structural Isotropic Composite Fuels","authors":"Xiaojiao Wang, Libing Zhu, Yan You, Zhaoquan Zhang","doi":"10.3390/en18051216","DOIUrl":"https://doi.org/10.3390/en18051216","url":null,"abstract":"Thermal conductivity is the key property of SiC-TRISO composite fuel. This study investigated the relationship between SiC phase transition, thermal conductivity, and microstructure across different temperatures. The physical phase, morphology, and microstructure of SiC and SiC-TRISO composite fuels were characterized by XRD and SEM. Meanwhile, EDS was employed to determine the chemical composition within SiC grains. The results showed the transformation of the β-SiC phase to α-SiC in the matrix with increasing sintering temperature, while Al, Y, and Ca concentrations within the SiC grains decreased. The highest λ value of SiC was achieved at a sintering temperature of 1750 °C, measuring 75.51 Wm·K at room temperature and 43.36 Wm·K at 500 °C. The incorporation of TRISO fuel lowered the λ value of SiC-TRISO composite fuel, yielding 57.96 and 34.51 Wm·K at room temperature and 500 °C, respectively. The outermost carbon layer of TRISO fuel interacts with the silicon carbide matrix and liquid phase, facilitating the phase transition from 3C-SiC to 6H-SiC and, subsequently, to 4H-SiC. This process accelerates the depletion of Al, Y, and Ca within the silicon carbide grains, encourages grain growth, and raises the free-carbon content, thereby decreasing the λ of the composite fuel.","PeriodicalId":11557,"journal":{"name":"Energies","volume":"18 5","pages":"1216-1216"},"PeriodicalIF":0.0,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/1996-1073/18/5/1216/pdf?version=1740889127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147888058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Absorption and Desorption Heat of Carbon Dioxide Capture Based on 2-Amino-2-Methyl-1-Propanol 基于2-氨基-2-甲基-1-丙醇的二氧化碳捕集吸收和解吸热研究
4区 工程技术
Energies Pub Date : 2025-02-22 DOI: 10.3390/en18051075
Jia Guo, Xin Wang, Yi Li, Qingfang Li, Haili Liu, Rongfang Wang
{"title":"Absorption and Desorption Heat of Carbon Dioxide Capture Based on 2-Amino-2-Methyl-1-Propanol","authors":"Jia Guo, Xin Wang, Yi Li, Qingfang Li, Haili Liu, Rongfang Wang","doi":"10.3390/en18051075","DOIUrl":"https://doi.org/10.3390/en18051075","url":null,"abstract":"In chemical absorption for carbon capture, the regeneration heat is a key factor determining solvent regeneration energy consumption, and the sterically hindered amine 2-amino-2-methyl-1-propanol (AMP) has great potential for application. In this paper, a CO2 reaction heat measurement system designed and constructed by our team was used to perform a comparative study on AMP and monoethanolamine (MEA). Moreover, five additives—MEA, diglycolamine (DGA), diethanolamine (DEA), methyldiethanolamine (MDEA), and piperazine (PZ)—were introduced into AMP-based solutions to investigate the promotion performance of these blended solvents. The results revealed that although AMP exhibited a slower absorption rate compared to MEA, it demonstrated a higher CO2 loading capacity and cyclic capacity, as well as a lower reaction heat, making it advantageous in terms of regeneration energy consumption. At the same total concentration, the absorption capacity of blended solutions (excluding AMP-MEA solutions) was generally lower than that of single-component AMP solutions. Among these additives, MEA and PZ could enhance the absorption rate clearly yet increase the reaction heat at the same time; DGA and DEA could decrease the overall absorption performance. Generally, AMP-MDEA solutions showed the best desorption performance, with the 15 wt% AMP + 5 wt% MDEA mixture demonstrating the lowest regeneration heat and good cyclic capacity.","PeriodicalId":11557,"journal":{"name":"Energies","volume":"18 5","pages":"1075-1075"},"PeriodicalIF":0.0,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/1996-1073/18/5/1075/pdf?version=1740226374","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Review of Wind-Assisted Propulsion Systems in Maritime Transport 海上运输中风助推进系统的研究进展
4区 工程技术
Energies Pub Date : 2025-02-13 DOI: 10.3390/en18040897
Marcin Kołodziejski, Mariusz Sosnowski
{"title":"Review of Wind-Assisted Propulsion Systems in Maritime Transport","authors":"Marcin Kołodziejski, Mariusz Sosnowski","doi":"10.3390/en18040897","DOIUrl":"https://doi.org/10.3390/en18040897","url":null,"abstract":"The maritime industry is going through a technology transition, aiming to have carbon-neutral propulsion systems. A significant trend of orders for ships with alternative propulsion has been observed. A favorable means to meet the decarbonization requirements imposed by IMO (International Maritime Organization) is to operate vessels with sustainable energy. Harvesting wind power and its conversion into ship propulsion are gaining popularity due to emission reductions and expected reductions in fuel consumption. This paper reviews recent studies on wind-assisted propulsion systems (WAPSs), the different aspects of using sail applications in the maritime industry, and the types of wind-assisted propulsion systems. The study also presents the latest developments in WAPS systems offered by leading maritime market manufacturers and their applications on existing vessels. The article is based on a literature review (peer-reviewed articles), the information provided by wind propulsion systems manufacturers and internet research.","PeriodicalId":11557,"journal":{"name":"Energies","volume":"18 4","pages":"897-897"},"PeriodicalIF":0.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/1996-1073/18/4/897/pdf?version=1739438949","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147884770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 21
A Comprehensive Review of Load Frequency Control and Solar Energy Integration: Challenges & Opportunities in Indian Context 负荷频率控制与太阳能集成的综合综述:印度环境下的挑战与机遇
4区 工程技术
Energies Pub Date : 2025-02-11 DOI: 10.3390/en18040843
Anjana Singh, Ravi Shankar, Amitesh Kumar
{"title":"A Comprehensive Review of Load Frequency Control and Solar Energy Integration: Challenges & Opportunities in Indian Context","authors":"Anjana Singh, Ravi Shankar, Amitesh Kumar","doi":"10.3390/en18040843","DOIUrl":"https://doi.org/10.3390/en18040843","url":null,"abstract":"Energy plays a crucial role in driving economic growth, and India’s energy consumption has increased notably due to its growing population and development. At present, fossil fuels such as coal, petroleum, and natural gas fulfill the majority of India’s energy requirements, but their swift depletion and negative environmental effects present significant challenges. India’s abundant solar energy potential—estimated at approximately 5000 trillion kWh annually—positions the nation to harness clean and sustainable power. With steady growth, solar energy has become a key component of India’s power grid. However, integrating renewable energy into the grid presents challenges, such as maintaining frequency and voltage stability. This report analyzes India’s substantial advancements in solar energy, emphasizing the enabling government policies and the problems associated with integrating renewable energy into the grid. The study underscores the crucial need for effective load frequency control (LFC) solutions to mitigate grid stability issues, intensified by the fluctuating and intermittent characteristics of solar energy. It also evaluates policy-driven approaches and technological advancements, providing practical recommendations to overcome integration challenges. This research aims to contribute to the effective deployment of solar energy in India’s energy mix, ensuring long-term grid stability and sustainability, and it underscores that India’s creative strategies can serve as a model for other nations facing analogous issues in renewable energy integration. It emphasizes the necessity of recognizing optimal practices that integrate energy security, economic development, and environmental objectives, thus contributing to global dialogs on energy transitions.","PeriodicalId":11557,"journal":{"name":"Energies","volume":"18 4","pages":"843-843"},"PeriodicalIF":0.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/1996-1073/18/4/843/pdf?version=1739431455","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147918118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Freezing Method Assists Peracetic Acid Oxidation for Promoting the Methane Production from Sludge Anaerobic Digestion 冷冻法辅助过氧乙酸氧化促进污泥厌氧消化产甲烷
4区 工程技术
Energies Pub Date : 2025-02-05 DOI: 10.3390/en18030731
Zhenwei Liu, Zhenwei Liu, Yanqiu Chen, Zhi-Shuai Liu, Zhi-Shuai Liu, Shengwu Wang
{"title":"Freezing Method Assists Peracetic Acid Oxidation for Promoting the Methane Production from Sludge Anaerobic Digestion","authors":"Zhenwei Liu, Zhenwei Liu, Yanqiu Chen, Zhi-Shuai Liu, Zhi-Shuai Liu, Shengwu Wang","doi":"10.3390/en18030731","DOIUrl":"https://doi.org/10.3390/en18030731","url":null,"abstract":"Peracetic acid (PAA) oxidation, which is a kind of chemical method for sludge pretreatment, has been verified to be valid for promoting sludge anaerobic digestion performance. However, the methane production is still limited at certain levels by this method, because excess PAA has negative effects on methanogens. This work selected a freezing method combined with PAA to form a composite sludge pretreatment technology for synergistically improving the biomethane production. According to the experimental data, the methane yield was largely enhanced from 166.4 ± 5.6 mL/g volatile suspended solids (VSS) in the control to 261.5 ± 7.3 mL/g VSS by the combined freezing (−10 °C) and PAA (0.08 g/g TSS) pretreatment, with a 57.2% increase rate. Kinetic analysis showed that the methane production potential, methane production rate, and hydrolysis rate were promoted, respectively, from 159.4 mL/g VSS, 17.18 mL/g VSS/d, and 0.104 d−1 to 254.9 mL/g VSS, 25.69 mL/g VSS/d, and 0.125 d−1 by the freezing + PAA pretreatment. Mechanism analysis revealed that the freezing + PAA pretreatment destroyed both extracellular polymeric substances (EPS) and microbial cells in the sludge, resulting in the increase in hydrolysis efficiency. Gene analysis showed that the hydrolytic microbes (Hyphomicrobium and norank_f_Caldilineaceae), acidogens (e.g., Petrimonas, Tissierella, and Mycobacerium) and methanogens (Methanosaeta, Methanosarcina, and Methanobacterium) were all enriched by the freezing + PAA pretreatment, with the total abundances calculated to be 10.65% and 22.07% in the control and pretreated reactors, respectively. Considering both technical and economic factors, the freezing + PAA method is feasible for sludge pretreatment.","PeriodicalId":11557,"journal":{"name":"Energies","volume":"18 3","pages":"731-731"},"PeriodicalIF":0.0,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/1996-1073/18/3/731/pdf?version=1740727649","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147904904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Co-Optimization of Operational and Intelligent Completion Parameters of CO2 Water-Alternating-Gas Injection Processes in Carbonate Reservoirs 碳酸盐岩储层CO2水-交替注气工艺完井工艺参数与智能参数协同优化
4区 工程技术
Energies Pub Date : 2025-01-16 DOI: 10.3390/en18020375
Xili Deng, Jingxuan Wang, Xiangguo Zhao, Liangyu Rao, Yongbin Zhao, Xiaofei Sun
{"title":"Co-Optimization of Operational and Intelligent Completion Parameters of CO2 Water-Alternating-Gas Injection Processes in Carbonate Reservoirs","authors":"Xili Deng, Jingxuan Wang, Xiangguo Zhao, Liangyu Rao, Yongbin Zhao, Xiaofei Sun","doi":"10.3390/en18020375","DOIUrl":"https://doi.org/10.3390/en18020375","url":null,"abstract":"Recently, maximum reservoir contacting (MRC) wells have attracted more and more attention and have been gradually applied to CO2 WAG injections. During the use of MRC wells for CO2 WAG injections, intelligent completions are commonly considered to control CO2 breakthroughs. However, the design of the operational and intelligent completion parameters is a complicated process and there are no studies on the co-optimization of the operational and intelligent completion parameters for CO2 WAG processes. This study outlines an approach to enhance the oil recovery from CO2 WAG injection processes through the co-optimization of the operational and intelligent completion parameters of MRC wells in a carbonate reservoir. First, a simulation method is developed by using Petrel and Intersect. Then, a series of simulations are performed to prove the viability of intelligent completions and to investigate the effects of the timing and duration of the CO2 WAG injection, as well as the type, number, and placement of intelligent completion devices on the performance of a CO2 WAG injection by MRC wells. Finally, the imperialist competitive algorithm is used to co-optimize the operational and intelligent completion parameters for MRC wells. The results show that compared with the spiral inflow control device (SICD), autonomous inflow control device (AICD), labyrinth inflow control device (LICD), and annular interval control valve (AICV), the nozzle inflow control device (NICD) is the best type of intelligent completion device for MRC wells. There is an optimal installation timing, inflow area, and number of NICDs for a CO2 WAG injection by MRC wells. The NICDs need to be placed based on the permeability distribution. The oil recovery for the optimal case with the NICDs reached 46.43%, which is an increase of 3.8% over that of the base case with a conventional completion. In addition, compared with the non-uniformity coefficient of the base case (11.7), the non-uniformity coefficient of the optimal case with the NICDs decreased to 4.21. This is the first time that the co-optimization of the operational and intelligent completion parameters of a CO2 WAG injection has been reported, which adds more information about the practical applications of MRC wells in CO2 WAG injections for enhancing oil recovery in carbonate reservoirs.","PeriodicalId":11557,"journal":{"name":"Energies","volume":"18 2","pages":"375-375"},"PeriodicalIF":0.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/1996-1073/18/2/375/pdf?version=1737042652","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147907254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Enhanced Hydrothermal Depolymerization with Fe/Ni Loaded C Catalysts for Improving Anaerobic Digestion Performance of Corn Stover Fe/Ni负载C催化剂强化水热解聚提高玉米秸秆厌氧消化性能
4区 工程技术
Energies Pub Date : 2025-01-05 DOI: 10.3390/en18010192
Xitong Wang, Chenyang Zhu, Hairong Yuan, Xiujin Li
{"title":"Enhanced Hydrothermal Depolymerization with Fe/Ni Loaded C Catalysts for Improving Anaerobic Digestion Performance of Corn Stover","authors":"Xitong Wang, Chenyang Zhu, Hairong Yuan, Xiujin Li","doi":"10.3390/en18010192","DOIUrl":"https://doi.org/10.3390/en18010192","url":null,"abstract":"This research investigated the effects of hydrothermal depolymerization with Fe/Ni loaded C catalysts on the anaerobic digestion (AD) performance of corn stover (CS). CS was depolymerized at 140 °C for 20 min with Fe/C or Ni/C catalysts, and then anaerobically digested. The results showed that the biomethane yield with Fe/C-600 increased by 36.6% compared to that of the control. This increase could be attributed to effective CS depolymerization with catalysts (DC), indicated by modified structures of solid fraction and enriched available components of liquid fraction. SEM analyses showed that CS microphysical structure after DC was obviously disrupted, resulting in more accessibility of cellulose and hemicellulose. The crystallinity index (CrI) of depolymerized CS was significantly reduced from 32.5% to 23.5%, allowing for a more easily biodegradable non-crystalline area to be available for enzymes. Meanwhile, the DC group produced 4.7 times more reducing sugar (RS), and a 3.4 times increase in total volatile fatty acids (VFAs) as compared to the control. Furthermore, these enhancements in DC led to an increased relative abundance of cellulolytic bacteria (Hydrogenispora and Fermentimonas) and anaerobic methanogenic archaea (Methanosarcina) in following the AD process. This could explain the reason for the biomethane yield increase with DC from microbial perspectives. This study demonstrated that hydrothermal depolymerization with Fe/C or Ni/C could provide an effective approach for obtaining more biomethane from CS via AD.","PeriodicalId":11557,"journal":{"name":"Energies","volume":"18 1","pages":"192-192"},"PeriodicalIF":0.0,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/1996-1073/18/1/192/pdf?version=1736062164","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Buried Interface Smoothing Boosts the Mechanical Durability and Efficiency of Flexible Perovskite Solar Cells 埋藏界面平滑提高柔性钙钛矿太阳能电池的机械耐久性和效率
4区 工程技术
Energies Pub Date : 2025-01-03 DOI: 10.3390/en18010174
Erxin Zhao, Yongshuai Gong, Yixin Dong, Wanlei Dai, Chou Liu, Tinghuan Yang, Nan Wu, Ye Yang, Zheng Zhang, C. Tian, Buyi Yan, Dongxue Liu, Lu Zhang, Tianqi Niu
{"title":"Buried Interface Smoothing Boosts the Mechanical Durability and Efficiency of Flexible Perovskite Solar Cells","authors":"Erxin Zhao, Yongshuai Gong, Yixin Dong, Wanlei Dai, Chou Liu, Tinghuan Yang, Nan Wu, Ye Yang, Zheng Zhang, C. Tian, Buyi Yan, Dongxue Liu, Lu Zhang, Tianqi Niu","doi":"10.3390/en18010174","DOIUrl":"https://doi.org/10.3390/en18010174","url":null,"abstract":"Flexible perovskite solar cells (F-PSCs) have the advantages of high power-per-weight, solution processability, and bending durability and have emerged as a competitive photovoltaic technology for various applications. As the core electron transport layer (ETL) in n-i-p-type device configurations, the solution-processed SnO2 generally suffers from serious defect stacking on films, compromising the charge transport properties and the performance of resulting devices. Herein, we proposed a media-filling strategy to optimize the contact quality at the buried interface by introducing Al2O3 nanoparticles on the SnO2 surface. Rather than forming a compact insulating layer, the Al2O3 can fill the grain boundaries of SnO2 and smooth the substrate surface. Optimized interfacial contact under careful concentration control can rationally minimize the contact area of the perovskite with the surface imperfections of SnO2 to mitigate trap-assisted charge recombination. Furthermore, the reduced surface roughness of SnO2 facilitates the uniform deposition and oriented growth of upper perovskite film. As a result, the target F-PSCs achieved an impressive efficiency of 23.83% and retained 80% of the initial performance after 5000 bending cycles at a radius of four mm.","PeriodicalId":11557,"journal":{"name":"Energies","volume":"18 1","pages":"174-174"},"PeriodicalIF":0.0,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/1996-1073/18/1/174/pdf?version=1735914217","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147915280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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