{"title":"Electronic structure and absorption characteristics of two-dimensional perovskites Csn+1PbnCl3n+1 (n = 1, 2, and 4): Co-regulation of the number of layers and Ge doping concentration","authors":"Wenbo Xiao , Xinping Guo , Yongbo Li , Jingbo Li","doi":"10.1016/j.jpowsour.2024.235879","DOIUrl":"10.1016/j.jpowsour.2024.235879","url":null,"abstract":"<div><div>The structures of monolayer (Cs<sub>2</sub>PbCl<sub>4</sub>), bilayer (Cs<sub>3</sub>Pb<sub>2</sub>Cl<sub>7</sub>), and tetralayer (Cs<sub>5</sub>Pb<sub>4</sub>Cl<sub>13</sub>) 2D CsPbCl<sub>3</sub> perovskites are constructed by cutting along the (001) crystal plane of CsPbCl<sub>3</sub>. The lattice structure, band structure, density of states, and absorption coefficients of Cs<sub>n+1</sub>Ge<sub>nx</sub>Pb<sub>n(1-x)</sub>Cl<sub>3n+1</sub> (n = 1, 2, and 4) at various germanium (Ge) doping concentrations are calculated. By co-regulating the number of layers and Ge doping concentration, the range for band gap tuning can be significantly broadened, overcoming the limitations associated with using a single tuning parameter. Furthermore, the analysis of absorption coefficients shows that increasing the number of layers has a limited effect on the material's absorption at visible wavelengths but improves the overall absorption performance. Increasing the Ge doping concentration notably enhances the absorption capabilities across both the visible and ultraviolet (UV) spectra (>8 eV) of materials. In conclusion, the co-regulation strategy employed in this study provides a wider range of band gap and absorption capabilities tuning for Cs<sub>n+1</sub>Ge<sub>nx</sub>Pb<sub>n(1-x)</sub>Cl<sub>3n+1</sub>, thereby significantly enhancing their potential and applicability in optoelectronics. Additionally, this study serves as an important reference for the construction and performance optimization of 2D perovskites.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235879"},"PeriodicalIF":8.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pengliang Chen , Bokai Kang , Pengcheng Liu , Xingxing Cheng , Shiming Zhong , Xuetao Wang , Baizeng Fang
{"title":"Passivation strategies for enhanced photoelectrochemical water splitting","authors":"Pengliang Chen , Bokai Kang , Pengcheng Liu , Xingxing Cheng , Shiming Zhong , Xuetao Wang , Baizeng Fang","doi":"10.1016/j.jpowsour.2024.235860","DOIUrl":"10.1016/j.jpowsour.2024.235860","url":null,"abstract":"<div><div>Photoelectrochemical (PEC) water splitting is an efficient method of absorbing solar energy and converting it to hydrogen energy. However, in actual applications, the photoelectric conversion efficiency is significantly lower than the theoretical value due to the high recombination of photogenerated carriers in the semiconductor and its own instability. Surface passivation strategies can reduce the impact of surface defect states on the actual photoelectric performance and achieve effective protection of the inner layer materials. This article reviews the recent advances in the passivation strategies for mainstream PEC photoanode materials, such as TiO<sub>2</sub>, BiVO<sub>4</sub>, Fe<sub>2</sub>O<sub>3</sub>, and photocathode materials such as Cu-based and silicon-based materials. The main functions of the passivation layer strategies are discussed, such as reducing surface recombination and maintaining semiconductor stability. The state of the art of passivation strategies is presented. The research achievements on passivation strategies are summarized, and their challenges and possible future development directions are projected.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235860"},"PeriodicalIF":8.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alexander Hahn , Jannes Müller , Stefan Doose , Arno Kwade
{"title":"Impact of silicon content on mechanical abuse and thermal runaway of Li-ion battery cells","authors":"Alexander Hahn , Jannes Müller , Stefan Doose , Arno Kwade","doi":"10.1016/j.jpowsour.2024.235840","DOIUrl":"10.1016/j.jpowsour.2024.235840","url":null,"abstract":"<div><div>In order to increase the energy density of lithium-ion batteries, the use of silicon alongside graphite is spreading in the application. However, the high energy densities are accompanied with safety risks, as high energy density materials can be more prone to thermal runaway. Therefore, the effect of five different silicon contents (0, 2.5, 5, 10, 15 wt%) on the safety performance during mechanical abuse were investigated. Anodes were produced, characterized and processed into cells with a NCM-83-11-6 cathode. The electrochemical performance was analyzed, and the thermal runaway in pouch cells was investigated using crush tests with a hemispherical punch. The results disclose an up to 30 % increase in load capacity with increasing silicon content while the thermal runaway reaction is more severe. The reaction time decreases with a rate of 0.035 s %<sub>Si</sub><sup>−1</sup> and the cell surface temperature as well as the mass loss increase with 6.1 °C %<sub>Si</sub><sup>−1</sup> and 0.47 % %<sub>Si</sub><sup>−1</sup>. This study provides insights into the influence of electrode and cell parameter from production to the safety behavior in a mechanical abuse test and can help to develop batteries that exhibit high energy density as well as sufficient safety characteristics.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235840"},"PeriodicalIF":8.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Utilization of superhydrophilic metallosurfactant electrocatalyst for enhanced cathodic oxygen reduction reaction in Microbial Fuel Cell","authors":"Pooja Devi , Harshal Mehta , Uma Batra , Gurpreet Kaur","doi":"10.1016/j.jpowsour.2024.235841","DOIUrl":"10.1016/j.jpowsour.2024.235841","url":null,"abstract":"<div><div>The microbial fuel cells (MFCs) have the ability to produce clean energy from waste, but the process needs to be more sustainable, cost effective, durable and scalable. A Palladium metallosurfactant PdDDAB (Didodecyldimethylammonium palladium bromide dichloride) based super-hydrophilic bilayered film is developed on carbon cloth (CC) as Oxygen reduction reaction (ORR) cathode catalyst for microbial fuel cell using one step hydrothermal approach. At an optimized concentration (1.5 mM), catalyst shows a higher increase in the current density, a thousand fold rise in the exchange current density. Moreover, 60 times reduced polarisation resistance than bare CC and decreased tafel slope is observed. The PdDDAB-coated electrode exhibits a more positive onset potential and retains 90.8 % initial current density for 24 h showing remarkable stability against ORR. The enhanced catalytic performance in ORR is due to formation of uniform bilayered lamellar membrane with super-hydrophilic behavior, arising from the synergistic effect of electrochemical properties of Pd and the surface characteristics of DDAB surfactant. The catalyst also demonstrates 150 % higher current density (471.8 mA/m<sup>2</sup>) in single-chamber MFCs with Pseudomonas Aeruginosa compared to bare CC electrode (187.7 mA/m<sup>2</sup>).</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235841"},"PeriodicalIF":8.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shengxi Meng , Hao Ruan , Qiannan Yu , Qiang Zhao , Caihong Wang , Yong Wu , Shuai Tan
{"title":"Lamellar confined ionic liquid electrolytes with advanced performance for Li-ion batteries","authors":"Shengxi Meng , Hao Ruan , Qiannan Yu , Qiang Zhao , Caihong Wang , Yong Wu , Shuai Tan","doi":"10.1016/j.jpowsour.2024.235866","DOIUrl":"10.1016/j.jpowsour.2024.235866","url":null,"abstract":"<div><div>Ionic liquids are promising to rival traditional organic solvent to develop safe electrolytes for Li-ion batteries. However, the ionic liquid-based electrolytes still suffered from issues of inferior performance and potential leakage. Here, non-ionic surfactant Brij58 was introduced into ionic liquid electrolytes (BMPTFSI/LiTFSI) consisting of 1-butyl-1-methylpyrrolidinium bistriflimide (BMPTFSI) and LiTFSI salt to construct solid-state lyotropic liquid crystals (LLCs). Self-assembly of Brij58 in ionic liquid electrolytes constructed lamellar nanostructures, which confined the ionic liquid electrolytes to form layered conducting channels. The nanoscale layered conducting channels in solid-state LLC electrolytes endowed liquid-like ion conductivity and significantly improved Li-ion transfer. Although the LLC electrolytes only consumed 50 wt % BMPTFSI/LiTFSI, the discharge capacities and rate performance of the Li-ion batteries based on LLC electrolytes was much improved comparing to that containing pristine BMPTFSI/LiTFSI. Also, the flame-retardant feature retained within the lamellar LLC electrolytes. The work paved new way for optimizing the conducting performance of IL electrolytes by constructing lamellar lyotropic LLC nanostructures.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235866"},"PeriodicalIF":8.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The photoelectrode of photo-rechargeable zinc-ion batteries: Design, progress","authors":"Qianqian Cai, Guangran Di, Xiaojing Yin, Ye Liu, Guoqiang Wang, Yubo Kuang, Xiaoqian Xiang, Kaixin Wang, Lei Zhang, Xing Chen, Xiaojun Lv","doi":"10.1016/j.jpowsour.2024.235854","DOIUrl":"10.1016/j.jpowsour.2024.235854","url":null,"abstract":"<div><div>With the continuous transformation of the energy structure, the position of solar energy in energy consumption is becoming more and more important due to its easy accessibility, abundant supply and renewable features. Solar cells are an effective means of realizing solar energy into electrical energy. However, solar cells can only output electrical energy, but cannot achieve energy storage. Photo-rechargeable batteries are a strategy to utilize solar energy efficiently, which can charge the battery by solar energy indirectly and release the electrical energy when needed. Zinc-ion batteries have vast prospects for the development of electrochemical energy storage batteries due to their high theoretical capacity, low cost and high safety. As a device integrating solar energy collection, conversion and storage, photo-rechargeable zinc-ion batteries (PRZIBs) have attracted extensive research interest in recent years. However, PRZIBs still face problems such as lack of development of photoelectrode materials, low energy conversion efficiency, and short survive life. In this paper, the working principle of PRZIBs and the development of photoelectrodes in material selection and structural design are introduced, and the research results of PRZIBs in recent years are systematically summarized. Finally, the problems that need to be solved in the development of PRZIBs are discussed, and suggestions are put forward to achieve high-performance and availability PRZIBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235854"},"PeriodicalIF":8.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yu Bao , Wei Tang , Pengqi Chen , Yingwei Lu , Tao Hong , Jigui Cheng
{"title":"The evaluation of triple conductor Ba0.95La0.05Fe0.8Zn0.2O3-δ as air electrode for reversible protonic ceramic fuel cell","authors":"Yu Bao , Wei Tang , Pengqi Chen , Yingwei Lu , Tao Hong , Jigui Cheng","doi":"10.1016/j.jpowsour.2024.235882","DOIUrl":"10.1016/j.jpowsour.2024.235882","url":null,"abstract":"<div><div>High-efficiency and low-pollution energy conversion devices as protonic ceramic fuel cells have attracted the interest of a wide range of researchers, and the air electrode materials play vital roles in the operation of fuel cell and also dominate the electrolysis of steam to hydrogen process. Here we report the triple conductor Ba<sub>0.95</sub>La<sub>0.05</sub>Fe<sub>0.8</sub>Zn<sub>0.2</sub>O<sub>3−δ</sub> (BLFZ) with high proton concentration as air electrode to evaluate its electrochemical performance. The BLFZ powder could remain its cubic structure with the lattice parameter of 4.063 Å in humid air at 700 °C. The electrical conductivity relaxation measurement proves that the proton uptake in BLFZ could be taken in hydrogenation method, but shows slower proton uptake kinetics than oxygen ion. And in symmetrical cell test, the BLFZ electrode exhibits obvious competition in oxygen and water molecular adsorption, where the addition of steam in air could result in higher polarization resistance and shows better electrochemical performance in humid pure O<sub>2</sub> atmosphere. When apply the BLFZ as air electrode in fuel cell, it shows 0.623 Wcm<sup>−2</sup> power density at 700 °C, and in electrolysis mode, the BLFZ air electrode shows good catalytic activity for water electrolysis with 0.5 Acm<sup>−2</sup> current density at 1.3 V under 600 °C.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235882"},"PeriodicalIF":8.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jae-Ho Park , Min-Young Kim , Jiwon Jeong , Mingony Kim , Hun-Gi Jung , Woo Young Yoon , Kyung Yoon Chung
{"title":"Surface modification effect of Li3NbO4 on LiNi0.5Co0.2Mn0.3O2 cathode material under varying voltage and temperature conditions","authors":"Jae-Ho Park , Min-Young Kim , Jiwon Jeong , Mingony Kim , Hun-Gi Jung , Woo Young Yoon , Kyung Yoon Chung","doi":"10.1016/j.jpowsour.2024.235845","DOIUrl":"10.1016/j.jpowsour.2024.235845","url":null,"abstract":"<div><div>Lithium-ion batteries (LIBs) play a key role in energy storage applications due to their high energy density and long cycle life. However, the structural and electrochemical degradation of cathode materials, especially under high-voltage and high-temperature conditions, remains a critical challenge. In this study, we address these issues by applying surface modification to LiNi<sub>0.5</sub>Co<sub>0.2</sub>Mn<sub>0.3</sub>O<sub>2</sub> (NCM523) using Li<sub>3</sub>NbO<sub>4</sub> (LNbO) through a solid-state coating method. This surface modification aims to suppress adverse side reactions, enhance structural stability, and improve both electrochemical performance and thermal stability. Our findings show LNbO coating effectively mitigates undesirable phase transitions, such as the formation of spinel and rock-salt structures, and significantly improves cycling stability. Furthermore, this study shows that the optimal LNbO coating ratio varies depending on specific operating conditions, and adjusting the coating thickness according to the voltage and temperature requirements is important. It also demonstrates that the coating improves thermal stability. This study highlights the potential of LNbO surface modification as a scalable and practical strategy to improve the performance and safety of NCM-based cathodes, particularly for high-performance LIBs in EV and ESS applications, where both high energy density and thermal stability are essential.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235845"},"PeriodicalIF":8.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Electrochemical characterization and discharge performance of AZ31, AZ61 and AZ91 alloys as anodes for seawater battery","authors":"Arya Sethu Madhavan , K.A. Thomas , Leena Rajith","doi":"10.1016/j.jpowsour.2024.235863","DOIUrl":"10.1016/j.jpowsour.2024.235863","url":null,"abstract":"<div><div>The abundance, environmental friendliness and high energy density of magnesium makes it an attractive option for eco-friendly battery development. This research article explores the performance of commercial magnesium alloys AZ31, AZ61 AZ91 in seawater battery applications, with a focus on corrosion resistance, discharge efficiency and long-term stability. The study highlights the role of aluminium concentration in these alloys, with a specific emphasis on how variations in concentration impact the performance metrics such as corrosion susceptibility, hydrogen evolution and anode utilization. Increasing the aluminium concentration to around 6 wt % in AZ61 not only boosts discharge activation but also enables the formation of protective magnesium aluminide (Mg<sub>17</sub>Al<sub>12</sub>), which acts as a barrier, preventing the self-peeling of corrosion products and enhancing stability during prolonged discharge. AZ61 emerges as the optimal alloy, balancing corrosion resistance, discharge efficiency, high anode utilization factor and long-term stability in highly corrosive seawater conditions. The results of electrochemical and discharge performance testing are supported by electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. The work offers a framework for future research that can boost the development on design of seawater battery with corrosion-resistant materials, high discharge efficiency and minimal adverse environmental impact.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235863"},"PeriodicalIF":8.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xiaoxing Yang , Guogang Yang , Hao Wang , Zhuangzhuang Xu , Shengzheng Ji , Han Sun , He Miao , Jinliang Yuan
{"title":"Pore-scale investigation of methane steam transport in porous anodes of solid oxide fuel cells with varying structures","authors":"Xiaoxing Yang , Guogang Yang , Hao Wang , Zhuangzhuang Xu , Shengzheng Ji , Han Sun , He Miao , Jinliang Yuan","doi":"10.1016/j.jpowsour.2024.235881","DOIUrl":"10.1016/j.jpowsour.2024.235881","url":null,"abstract":"<div><div>A pore-scale Lattice Boltzmann (LB) model has been developed to simulate multi-component mass transport in the porous anodes of solid oxide fuel cells (SOFCs) operating with methane steam. In this model, different porosities, carbon depositions, and gradients of anode microstructures are reconstructed through quartet structure generation set methods, and their impact on the local distribution of methane steam is thoroughly investigated both qualitatively and quantitatively. The relationship between anode microstructures and mass transfer has been clearly established. The results demonstrate that the localized porosity within the anode microstructure has a significant impact on mass transport. By modifying the anode structure into a gradient electrode, the transport effect can be effectively enhanced, and carbon deposition is slowed down. The LB model and the findings of this study are crucial for developing anode structures resistant to carbon deposition.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235881"},"PeriodicalIF":8.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}