IF 9.4 1区工程技术

Energy Pub Date : 2025-09-27 DOI: 10.1016/j.energy.2025.138628

Carolin Ayasse, Julia Barbosa, Florian Steinke

{"title":"Optimal decarbonization of urban heating systems considering interdependencies between building retrofits and heat supplies","authors":"Carolin Ayasse, Julia Barbosa, Florian Steinke","doi":"10.1016/j.energy.2025.138628","DOIUrl":"10.1016/j.energy.2025.138628","url":null,"abstract":"<div><div>Optimal decarbonization paths of urban heating systems contain both heat demand- and supply-side related measures. Building retrofits, i.e., measures that increase buildings’ energy efficiency, affect the optimal choice of heat generation, which in turn influences optimal building retrofit decisions. Existing energy system models struggle to represent these interdependencies model-endogenously; either a high level of abstraction does not capture key characteristics of the heating system sufficiently accurately or the computational costs are too high if existing, detailed methods are applied at an urban scale. This paper presents mixed-integer linear programming-style optimization conditions that allow to treat these interdependencies model-endogenously at an urban scale with a heterogeneous residential building stock. The urban area is divided into districts, each with multiple archetype buildings representing various building types and energy standards. Retrofit decisions are determined within the model for each district, reducing heat demands and enabling lower heat supply temperatures and thereby more efficient heat generation units. Different existing mixed-integer linear programming-based energy system modeling frameworks can be extended using the proposed new conditions, with only five coupling constraints to the remainder of the system. The technical benefits of the methodology are demonstrated with an experimental case study featuring an urban area with three districts.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"338 ","pages":"Article 138628"},"PeriodicalIF":9.4,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145270787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative analysis of combustion and emission characteristics of diesel/alcohol dual-fuel in a pressure-difference controlled same needle injector system with synergistic EGR optimization 基于协同EGR优化的压差控制同针式喷油器柴油/酒精双燃料燃烧与排放特性对比分析

IF 9.4 1区工程技术

Energy Pub Date : 2025-09-27 DOI: 10.1016/j.energy.2025.138663

Zhi Tian , Xupeng Feng , Yang Wang , Xudong Zhen , Xiaoyan Li

{"title":"Comparative analysis of combustion and emission characteristics of diesel/alcohol dual-fuel in a pressure-difference controlled same needle injector system with synergistic EGR optimization","authors":"Zhi Tian , Xupeng Feng , Yang Wang , Xudong Zhen , Xiaoyan Li","doi":"10.1016/j.energy.2025.138663","DOIUrl":"10.1016/j.energy.2025.138663","url":null,"abstract":"<div><div>This study employs experimental and simulation methods to investigate a same-needle diesel-alcohol dual-fuel injector system based on pressure difference (ΔP) control. Under a 70 % load operating condition, a comparative analysis is conducted on the combustion and emission characteristics of three dual-fuel modes (diesel-methanol/ethanol/N-butanol (DMDF, DEDF, and DNDF)) and diesel in combination with exhaust gas recirculation (EGR). The results indicated that as the alcohol substitution ratio decreased (increased ΔP), CA10 occurred earlier, the combustion duration was prolonged. Among the four modes evaluated, the DMDF mode demonstrated the highest brake thermal efficiency (BTE) and the most significant emission reduction capabilities. Specifically, compared to conventional diesel operation, the BTE was improved by up to 9.77 %. Additionally, emissions of NO<sub>x</sub> and soot were significantly reduced by a maximum of 70.98 % and 99.7 %, respectively. These benefits are mainly due to methanol’s high oxygen content, rapid combustion rate, and substantial evaporative cooling effect, which together enhance combustion completeness and suppress pollutant formation. Moreover, the combination of DMDF and EGR effectively alleviated the NO<sub>x</sub>-soot trade-off. The study demonstrates that DMDF with the dual-fuel injector and EGR offers a highly promising pathway toward achieving high-efficiency, ultra-low emission engines applicable to transportation sectors.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"337 ","pages":"Article 138663"},"PeriodicalIF":9.4,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Frost suppression performance and degradation mitigation strategy of superhydrophobic air source heat pump 超疏水空气源热泵抑霜性能及退化减缓策略

IF 9.4 1区工程技术

Energy Pub Date : 2025-09-26 DOI: 10.1016/j.energy.2025.138690

Rui Tang , Wenzhe Wei , Yunfeng Wang , Wei Wang , Yuying Sun , Chuanmin Dai , Zhouyang Luo , Weiming Teng , Shen Wei

{"title":"Frost suppression performance and degradation mitigation strategy of superhydrophobic air source heat pump","authors":"Rui Tang , Wenzhe Wei , Yunfeng Wang , Wei Wang , Yuying Sun , Chuanmin Dai , Zhouyang Luo , Weiming Teng , Shen Wei","doi":"10.1016/j.energy.2025.138690","DOIUrl":"10.1016/j.energy.2025.138690","url":null,"abstract":"<div><div>The superhydrophobic coating exhibits excellent frosting suppression performance on a single surface or a full-scale heat exchanger. However, its suppression performance when used in air source heat pumps (ASHPs) is still unclear, owing to the more complex factors. To promote its application in ASHPs, the superhydrophobic coating with good durability was fabricated, and used to manufacture the superhydrophobic ASHP. Its space heating and frosting performance under different frosting conditions were investigated. Then, for its frost suppression performance degradation problem during continuous frosting-defrosting process, the reasons were analyzed and a solution was proposed. Experimental results showed that the frost suppression performance of superhydrophobic ASHP varies significantly under different frosting condition. Its frost suppression performance was excellent at the 2/1 °C condition, while failed at the −3/-4 °C condition. At 2/1 °C condition, its heating duration, average heating capacity and coefficient of performance were increased by 16.00 %, 10.91 %, and 6.35 %, compared to conventional hydrophilic ASHP. During the continue frosting-defrosting cycles, the frost suppression performance of the superhydrophobic ASHP degraded gradually, owing to the fan blade and fan shroud icing. By adopting the proposed control strategy combining fan reverse operation and electric heating film operation, the frost suppression performance degradation problem was addressed effectively.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"338 ","pages":"Article 138690"},"PeriodicalIF":9.4,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bi-level collaborative day-ahead optimization scheduling of manufacturing-energy system targeting energy cost reduction 以降低能源成本为目标的制造能源系统两级协同日前优化调度

IF 9.4 1区工程技术

Energy Pub Date : 2025-09-26 DOI: 10.1016/j.energy.2025.138672

Yong Chen, Xianping Huang, Wenchao Yi, Zhi Pei, Cheng Wang, Zuzhen Ji

{"title":"Bi-level collaborative day-ahead optimization scheduling of manufacturing-energy system targeting energy cost reduction","authors":"Yong Chen, Xianping Huang, Wenchao Yi, Zhi Pei, Cheng Wang, Zuzhen Ji","doi":"10.1016/j.energy.2025.138672","DOIUrl":"10.1016/j.energy.2025.138672","url":null,"abstract":"<div><div>Rising energy costs have become a critical factor in production planning and scheduling. This paper proposes a bi-level collaborative optimization scheduling approach to address the challenge of reducing energy cost in flexible manufacturing systems. The model is designed to find an optimal production and energy scheduling scheme that minimizes the total energy cost while respecting day-ahead scheduling constraints. The proposed framework uniquely integrates manufacturing and energy systems through a bi-level structure. Specifically, the outer level reconfigures flexible production schedules to enable load shifting, while the inner level optimizes distributed energy dynamics based on multi-energy complementarity within Virtual Power Plants (VPPs) and Time-of-Use (TOU) pricing. The results demonstrate that this approach achieves significant energy cost savings and exhibits high robustness against load fluctuations and uncertainties in wind power (WP) and photovoltaic (PV) generation. The developed framework provides a robust and practical solution for achieving economic objectives in manufacturing systems.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"338 ","pages":"Article 138672"},"PeriodicalIF":9.4,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145270447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shifting drivers of urban cooling energy demand in China (1978–2024): A spatiotemporal analysis 中国城市制冷能源需求变化驱动因素（1978-2024）：时空分析

IF 9.4 1区工程技术

Energy Pub Date : 2025-09-26 DOI: 10.1016/j.energy.2025.138650

Shaojing Jiang , Zhongwang Wei

{"title":"Shifting drivers of urban cooling energy demand in China (1978–2024): A spatiotemporal analysis","authors":"Shaojing Jiang , Zhongwang Wei","doi":"10.1016/j.energy.2025.138650","DOIUrl":"10.1016/j.energy.2025.138650","url":null,"abstract":"<div><div>Understanding cooling energy demand stress (CEDS) under urbanization and climate change is essential for sustainable energy planning. This study aims to examine the spatiotemporal evolution of CEDS in China from 1978 to 2024 and to disentangle the relative contributions of climatic and socioeconomic drivers. To achieve this objective, a multi-factor framework was developed, integrating both climatic factors (CDD extremes, CDD sums) and socioeconomic factors (population, building coverage) based on daily temperature records from 2310 stations and gridded population and land-cover data. Results indicate that the CEDS index increased rapidly across most of China (urban: 0.09, rural: 0.01, all: 0.02 per decade on average), with the sharpest rise at urban stations, where values rose from 0.40 to 0.74. The proportion of urban hotspot stations (CEDS >0.5) increased from 18.35 % in 1978–1988 to 92.66 % in 2014–2024, with CEDS hotspot coverage primarily concentrated in the southeastern (47.17 %) and northeastern (30.31 %) regions. Attribution analysis reveals climatic factors have consistently dominated CEDS in nonurban regions (86.16 % in 1978–1988; 77.67 % in 2014–2024), whereas urban areas shifted from climate-dominated CEDS in 1978–1988 (CDD extremes and CDD sums: 71.02 %) to socioeconomically driven CEDS in 2014–2024 (population and building coverage: 54.18 %; CDD extremes and CDD sums: 45.82 %). These findings highlight the necessity for region-specific strategies. Socioeconomically dominant urban hotspots are advised to adopt public energy-saving policies and promote energy-efficient building designs. In contrast, climatically driven nonurban areas are encouraged to leverage abundant land resources for renewable energy, such as solar and reservoir-based cooling, to mitigate persistent climate pressures.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"338 ","pages":"Article 138650"},"PeriodicalIF":9.4,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145270558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The graphene formation via flash Joule heating: The effect of cooling rate 闪蒸焦耳加热石墨烯的形成：冷却速率的影响

IF 9.4 1区工程技术

Energy Pub Date : 2025-09-26 DOI: 10.1016/j.energy.2025.138673

Mingfan Zhang , Dikun Hong , Tong Xu , Yao Zhang , Mengyang Sun , Chunbo Wang

{"title":"The graphene formation via flash Joule heating: The effect of cooling rate","authors":"Mingfan Zhang , Dikun Hong , Tong Xu , Yao Zhang , Mengyang Sun , Chunbo Wang","doi":"10.1016/j.energy.2025.138673","DOIUrl":"10.1016/j.energy.2025.138673","url":null,"abstract":"<div><div>Conventional graphene synthesis encounter significant challenges in scalability, cost, and efficiency, which hinder their industrial applicability. Although flash Joule heating (FJH) enables the efficient and cost-effective production of high-quality graphene, its underlying mechanism, particularly the effect of cooling rate, has not been thoroughly investigated. In this work, ReaxFF molecular dynamics (ReaxFF MD) simulations were utilized to investigate the conversion of natural rubber into graphene via FJH. The results demonstrated that the rapid cooling process played a critical role in flash graphene formation. Radial distribution function analysis confirmed that the products obtained under cooling were high-quality graphene, with further improvements observed at slower cooling rates (0.22 K/ps and 0.44 K/ps). Moreover, potential energy assessments indicated that cyclization occurred more rapidly under ultrafast cooling, resulting in lower-quality graphene. Two crucial mechanisms were revealed to govern graphene formation via FJH. Firstly, the carbon source underwent rapid pyrolysis at transient high temperatures, during which tar and gases were released, leaving behind a char residue that condensed into graphene during the subsequent rapid cooling stage. Secondly, the reduction in system potential energy during the cooling process facilitated cyclization, with the reaction initiating once the potential energy reached approximately 75000 kcal/mol.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"337 ","pages":"Article 138673"},"PeriodicalIF":9.4,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative analysis of unmanned rice production methods in China: an evaluation of energy and economic benefits 中国水稻无人化生产方式的比较分析：能源效益与经济效益评价

IF 9.4 1区工程技术

Energy Pub Date : 2025-09-25 DOI: 10.1016/j.energy.2025.138671

Haibin Zhu, Yuankun Gu, Yuan Feng, Kaiwei Zhang, Yang Wang, Zhipeng Xing, Hui Gao, Haiyan Wei, Hongcheng Zhang, Qun Hu

{"title":"Comparative analysis of unmanned rice production methods in China: an evaluation of energy and economic benefits","authors":"Haibin Zhu, Yuankun Gu, Yuan Feng, Kaiwei Zhang, Yang Wang, Zhipeng Xing, Hui Gao, Haiyan Wei, Hongcheng Zhang, Qun Hu","doi":"10.1016/j.energy.2025.138671","DOIUrl":"10.1016/j.energy.2025.138671","url":null,"abstract":"<div><div>To explore the potential application value of various unmanned rice planting methods, we performed quantitative comparisons of energy utilization and economic benefits for unmanned aerial seeding (UAS), unmanned dry direct seeding (UDDS), and unmanned carpet transplanting (UCT) from 2021 to 2023. The results showed that the total energy inputs in UAS and UDDS were significantly lower than that in UCT, reflecting decreases of 10.13 % and 13.84 %, respectively. UCT demanded considerably more diesel, water, plastics, and labor than the other methods, while UAS significantly reduced inputs of machinery, diesel, water, and labor but increased inputs of electricity, seeds, and farm chemicals. Meanwhile, UDDS further decreased diesel and water consumption despite more machinery input. Although both UAS and UDDS caused lower energy outputs of grain and straw yields, only UDDS showed a significant difference from UCT, while all methods exhibited similar net energy. Additionally, UAS and UDDS significantly outperformed UCT in energy use efficiency, profitability, and productivity, while also significantly reducing specific energy consumption. Both economic income and cost trends were UCT > UAS > UCT, with UAS and UCT differing significantly only in costs, while UDDS and UCT differed significantly in both indicators. However, there was no statical difference in net profit or net return rate among the methods. These findings suggest that UAS is promising for rice unmanned cultivation with the characteristics of low-cost and high-income and coordinating grain yield and food security.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"337 ","pages":"Article 138671"},"PeriodicalIF":9.4,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High potential of urban area originally inedible food waste for bioenergy to mitigate climate change 城市地区原本不可食用的食物垃圾转化为生物能源以缓解气候变化的巨大潜力

IF 9.4 1区工程技术

Energy Pub Date : 2025-09-25 DOI: 10.1016/j.energy.2025.138665

Weiguo Liu , Zemeng Ma , Kui Wang , Mingjie Fang , Xiaofan Gan , Bingqian Guo , Jingcong Xie , Changhui Peng

{"title":"High potential of urban area originally inedible food waste for bioenergy to mitigate climate change","authors":"Weiguo Liu , Zemeng Ma , Kui Wang , Mingjie Fang , Xiaofan Gan , Bingqian Guo , Jingcong Xie , Changhui Peng","doi":"10.1016/j.energy.2025.138665","DOIUrl":"10.1016/j.energy.2025.138665","url":null,"abstract":"<div><div>Original Inedible Food Waste (OIFW) represents a significant untapped resource that could generate considerable bioenergy and help combat climate change; however, the potential availability for bioenergy and associated mitigation effects has not been rigorously assessed. Here, we quantified the amount of OIFW available in urban areas worldwide, and evaluated the contribution to climate change and mitigation effect when OIFW was used for producing combined heat and power (CHP). Our analysis revealed that the world’s total potential available OIFW was 11.896–71.204 million ton carbon and could provide 239.911–1197.487 PJ bioenergy. The overall contribution to climate change ranged from −22.567 ± 0.265 to −420.332 ± 10.395 million ton CO<sub>2</sub> eq. The maximum possible mitigation effect is estimated at 554.94 ± 10.395 million tons CO<sub>2</sub> equivalent (up to 17.9 % of the global CO<sub>2</sub> emissions from natural gas-derived electricity and heat), with a minimum effect at around 47.769 ± 0.265 million ton CO<sub>2</sub> eq. Therefore, an early deployment of OIFW collection system for CHP is in need to harness OIFW as a resource for bioenergy and a solution for climate change mitigation.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"337 ","pages":"Article 138665"},"PeriodicalIF":9.4,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on combined cooling and heating supply of a transcritical CO2 heat pump based on high-temperature heating optimization 基于高温供热优化的跨临界CO2热泵冷热联供实验研究

IF 9.4 1区工程技术

Energy Pub Date : 2025-09-25 DOI: 10.1016/j.energy.2025.138660

Lingxiao Yang , Xin Wang , Bo Xu , Zhenqian Chen

{"title":"Experimental study on combined cooling and heating supply of a transcritical CO2 heat pump based on high-temperature heating optimization","authors":"Lingxiao Yang , Xin Wang , Bo Xu , Zhenqian Chen","doi":"10.1016/j.energy.2025.138660","DOIUrl":"10.1016/j.energy.2025.138660","url":null,"abstract":"<div><div>Transcritical CO<sub>2</sub> cycle has great advantages in the combined cooling and heating scenario requiring large heating temperature differences. With the research objective of combined cooling and high-temperature heating (CHH) by the transcritical CO<sub>2</sub> heat pump (TCHP), four parts of the study have been conducted sequentially, focusing on the operational characteristics of the system, the optimization of throttle opening benchmarks, the optimization of controllable parameters and the influence of internal heat exchanger (IHX) on the system. As the result shows: Raising the system heating temperature (<em>T</em><sub>h</sub>) will always reduce its operational performance, and adjusting the compressor speed has a relatively better effect on increasing <em>T</em><sub>h</sub>; A smaller throttle opening can significantly improve the CHH performance of the system, and up to 30.24 % elevation in combined system COP has been reported by optimizing throttle opening benchmarks; The synergistic control strategy of controllable parameters allow the system to achieve optimum operational performance. The optimum combined COP obtained at <em>T</em><sub>h</sub> levels of 80, 90 and 100 °C are 5.193, 4.475 and 3.905, respectively; Introducing IHX has a clear impact on enhancing system performance, with combined COP improvements ranging from 4.25 % to 17.82 % in this study.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"337 ","pages":"Article 138660"},"PeriodicalIF":9.4,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Co/Zn synergistic catalysis: Carbon nanotubes wrapped N-doped porous carbon derived from MOF as electrode materials for supercapacitors Co/Zn协同催化：碳纳米管包裹n掺杂多孔碳制备的MOF作为超级电容器电极材料

IF 9.4 1区工程技术

Energy Pub Date : 2025-09-25 DOI: 10.1016/j.energy.2025.138667

Run-Sheng Zhai , Chen-Yu Li , Hui Huang , Guang-Ping Zhang

{"title":"Co/Zn synergistic catalysis: Carbon nanotubes wrapped N-doped porous carbon derived from MOF as electrode materials for supercapacitors","authors":"Run-Sheng Zhai , Chen-Yu Li , Hui Huang , Guang-Ping Zhang","doi":"10.1016/j.energy.2025.138667","DOIUrl":"10.1016/j.energy.2025.138667","url":null,"abstract":"<div><div>The development of metal-organic framework (MOF)-derived porous carbon materials, specifically CoZn/NC, for supercapacitors is achieved through a one-step annealing process of the precursor ZIF-67@ZIF-8, which has a distinctive flower-like structure. The flower-like structure is formed under the influence of the introduced SO<sub>4</sub><sup>2−</sup>, which accelerates the nucleation of ZIF-67. This process enables the CoZn/NC material to combine the advantages of a balanced pore size distribution, a high specific surface area, and high nitrogen content. As a result, the electrical energy storage is improved and pseudocapacitance is introduced. Furthermore, characterization results indicate that moderate amounts of carbon nanotubes grow on the surface of the carbon material. This growth is facilitated by the catalysis of cobalt nanoparticles and the synergistic effects of zinc. These carbon nanotubes help form an excellent conductive network. Electrochemical tests reveal that the specific capacitance of the CoZn/NC carbon material reaches 324.1 F g<sup>−1</sup> at a current density of 0.5 A g<sup>−1</sup> and retains 98.8 % of its initial capacitance after 14000 cycles at 10 A g<sup>−1</sup>. Additionally, the CoZn/NC material, when assembled into symmetrical capacitors, achieves an energy density of 16 Wh kg<sup>−1</sup> at a power density of 300.8 W kg<sup>−1</sup>, surpassing the performance of most other electrode materials derived from MOF-based porous carbon reported in the literature.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"337 ","pages":"Article 138667"},"PeriodicalIF":9.4,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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