Journal of Power Sources最新文献

英文中文

State of charge estimation with representative cells-based hybrid model for lithium-ion battery pack

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-01 DOI: 10.1016/j.jpowsour.2025.236911

Tian Tang , Xingtao Liu , Xun Sun , Yuan Zhang , Ji Wu

Electric vehicles (EVs) are central to achieving carbon neutrality, with the battery pack acting as the crucial energy storage system. However, applying models designed for single cells directly to battery packs can be problematic because of variations in electrochemical parameters such as capacity and internal resistance, even among cells from the same production batch. These discrepancies can lead to significant errors in the state of charge (SOC) estimation. To address this issue, we propose an algorithm combining the cell mean model (CMM) with a long short-term memory (LSTM) neural network for more accurate SOC estimation in battery packs. By analyzing the differences among individual cells, we identify those with the most pronounced variations and those that reach the cut-off voltage first as representative cells. The CMM is used to summarize the pack's overall characteristics, and an extended Kalman filter (EKF) is employed for preliminary SOC estimation. Finally, the LSTM model refines the SOC estimate by learning complex dynamics between initial SOC values, representative cell data, and the actual pack SOC. Experimental results show that this approach achieves a root mean square error and mean absolute error under 1 %, significantly improving SOC estimation accuracy in dynamic conditions compared to traditional methods.

{"title":"State of charge estimation with representative cells-based hybrid model for lithium-ion battery pack","authors":"Tian Tang , Xingtao Liu , Xun Sun , Yuan Zhang , Ji Wu","doi":"10.1016/j.jpowsour.2025.236911","DOIUrl":"10.1016/j.jpowsour.2025.236911","url":null,"abstract":"<div><div>Electric vehicles (EVs) are central to achieving carbon neutrality, with the battery pack acting as the crucial energy storage system. However, applying models designed for single cells directly to battery packs can be problematic because of variations in electrochemical parameters such as capacity and internal resistance, even among cells from the same production batch. These discrepancies can lead to significant errors in the state of charge (SOC) estimation. To address this issue, we propose an algorithm combining the cell mean model (CMM) with a long short-term memory (LSTM) neural network for more accurate SOC estimation in battery packs. By analyzing the differences among individual cells, we identify those with the most pronounced variations and those that reach the cut-off voltage first as representative cells. The CMM is used to summarize the pack's overall characteristics, and an extended Kalman filter (EKF) is employed for preliminary SOC estimation. Finally, the LSTM model refines the SOC estimate by learning complex dynamics between initial SOC values, representative cell data, and the actual pack SOC. Experimental results show that this approach achieves a root mean square error and mean absolute error under 1 %, significantly improving SOC estimation accuracy in dynamic conditions compared to traditional methods.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"641 ","pages":"Article 236911"},"PeriodicalIF":8.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747586","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}

引用次数: 0

Online fault detection and isolation of PEMFC based on EIS and data-driven methods: Feasibility study and prospects

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-01 DOI: 10.1016/j.jpowsour.2025.236915

Dan Yu , Xingjun Li , Fan Zhou , Samuel Simon Araya , Simon Lennart Sahlin , Venkat R. Subramanian , Vincenzo Liso

Electrochemical impedance spectroscopy (EIS) can be useful for the mechanism analysis and diagnosis of proton-exchange membrane fuel cell (PEMFC) performance degradation. This review summarizes the potential of using EIS for real-time fault detection and isolation of the PEMFC by data-driven methods from the following aspects. First, the data-driven diagnosis strategy of PEMFC based on EIS is overviewed; the typical faults and EIS measurement for data collection are briefly introduced. Then, the application of EIS in the online data-driven diagnosis of PEMFC is analyzed and discussed, focusing on feature extraction from EIS, diagnosis models employing various machine learning methods, and the corresponding EIS features for each machine learning method. Finally, the feasibility of using EIS for online data-driven fault diagnosis of PEMFC is briefly summarized, and the research challenges and prospects are proposed. This review aims to provide inspiration and new insights for future research on online PEMFC diagnosis, prognostics, and health management.

{"title":"Online fault detection and isolation of PEMFC based on EIS and data-driven methods: Feasibility study and prospects","authors":"Dan Yu , Xingjun Li , Fan Zhou , Samuel Simon Araya , Simon Lennart Sahlin , Venkat R. Subramanian , Vincenzo Liso","doi":"10.1016/j.jpowsour.2025.236915","DOIUrl":"10.1016/j.jpowsour.2025.236915","url":null,"abstract":"<div><div>Electrochemical impedance spectroscopy (EIS) can be useful for the mechanism analysis and diagnosis of proton-exchange membrane fuel cell (PEMFC) performance degradation. This review summarizes the potential of using EIS for real-time fault detection and isolation of the PEMFC by data-driven methods from the following aspects. First, the data-driven diagnosis strategy of PEMFC based on EIS is overviewed; the typical faults and EIS measurement for data collection are briefly introduced. Then, the application of EIS in the online data-driven diagnosis of PEMFC is analyzed and discussed, focusing on feature extraction from EIS, diagnosis models employing various machine learning methods, and the corresponding EIS features for each machine learning method. Finally, the feasibility of using EIS for online data-driven fault diagnosis of PEMFC is briefly summarized, and the research challenges and prospects are proposed. This review aims to provide inspiration and new insights for future research on online PEMFC diagnosis, prognostics, and health management.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"641 ","pages":"Article 236915"},"PeriodicalIF":8.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746984","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}

引用次数: 0

Unbiased photoelectrochemical tandem configuration for water splitting

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-01 DOI: 10.1016/j.jpowsour.2025.236917

Yanhong Lyu , Yang Zhou , Jianyun Zheng

The photoelectrochemical (PEC) water splitting is an effective approach to generate the Renewable hydrogen energy. However, the overpotential is always existing due to thermodynamic and kinetic losses and applied bias is helpful to promote separation and transportation of charge carriers.To achieve a real clean hydrogen production, it is necessary to design and construct unbiased PEC configuration. In this review, we overviewed the research status and preparation strategies of the PEC tandem configuration for unbiased water splitting. We first introduced the fundamental properties of semiconductors and the properties of the semiconductor-electrolyte interface to help us better understand the latter content of charge carriers’ generation, separation, transportation and reaction. Then, we list some widely learned semiconductor materials using as photoanode and photocathode, many researchers have done much work to design and fabricate well-performed photoelectrodes. Based on the presentation of these materials, we summarize how to make an efficient and stable unbiased PEC configuration. Finally, a summrize and an outlook of PEC tandem configuration for unbiased water splitting are given.

{"title":"Unbiased photoelectrochemical tandem configuration for water splitting","authors":"Yanhong Lyu , Yang Zhou , Jianyun Zheng","doi":"10.1016/j.jpowsour.2025.236917","DOIUrl":"10.1016/j.jpowsour.2025.236917","url":null,"abstract":"<div><div>The photoelectrochemical (PEC) water splitting is an effective approach to generate the Renewable hydrogen energy. However, the overpotential is always existing due to thermodynamic and kinetic losses and applied bias is helpful to promote separation and transportation of charge carriers.To achieve a real clean hydrogen production, it is necessary to design and construct unbiased PEC configuration. In this review, we overviewed the research status and preparation strategies of the PEC tandem configuration for unbiased water splitting. We first introduced the fundamental properties of semiconductors and the properties of the semiconductor-electrolyte interface to help us better understand the latter content of charge carriers’ generation, separation, transportation and reaction. Then, we list some widely learned semiconductor materials using as photoanode and photocathode, many researchers have done much work to design and fabricate well-performed photoelectrodes. Based on the presentation of these materials, we summarize how to make an efficient and stable unbiased PEC configuration. Finally, a summrize and an outlook of PEC tandem configuration for unbiased water splitting are given.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"641 ","pages":"Article 236917"},"PeriodicalIF":8.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747570","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}

引用次数: 0

Hybrid porous carbon/polypyrrole composite from recycled coffee grounds as an active electrode material for lithium-ion batteries

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-01 DOI: 10.1016/j.jpowsour.2025.236894

Byung-Ho Kang , Seulgi Shin , Zahid Husain Momin , Do-Yeon Kim , Kunwoo Nam , Won-Jin Kim , Jihui Oh , Dong-Won Lee , Jong-Min Oh , Joonwon Bae , Weon Ho Shin , Sung-Hoon Park

This study introduces a hybrid composite of carbonized coffee grounds (CCG) and polypyrrole (PPy) as a sustainable and high-performance electrode material for lithium-ion batteries (LIBs). The composite was synthesized using a simple wet method and a controlled carbonization process. The synthesized material was characterized using FTIR and Raman spectroscopy to confirm its structural features and interactions. The CCG/PPy hybrid composite demonstrated outstanding electrochemical properties, including a high specific capacity of 503 mAh g⁻¹ after 200 cycles at a current density of 1 A g⁻¹, surpassing other biomass-based anode materials. Furthermore, it exhibited rapid charge/discharge kinetics (up to 2 A g⁻¹) and exceptional long-term cycling stability. These results are attributed to the synergistic combination of CCG's porous structure, which enhances ion transport, and PPy's conductive network, which improves charge transfer. This work highlights the potential of biowaste-derived materials, such as CCG, in advancing next-generation energy storage technologies by providing sustainable and efficient solutions for LIB applications.

{"title":"Hybrid porous carbon/polypyrrole composite from recycled coffee grounds as an active electrode material for lithium-ion batteries","authors":"Byung-Ho Kang , Seulgi Shin , Zahid Husain Momin , Do-Yeon Kim , Kunwoo Nam , Won-Jin Kim , Jihui Oh , Dong-Won Lee , Jong-Min Oh , Joonwon Bae , Weon Ho Shin , Sung-Hoon Park","doi":"10.1016/j.jpowsour.2025.236894","DOIUrl":"10.1016/j.jpowsour.2025.236894","url":null,"abstract":"<div><div>This study introduces a hybrid composite of carbonized coffee grounds (CCG) and polypyrrole (PPy) as a sustainable and high-performance electrode material for lithium-ion batteries (LIBs). The composite was synthesized using a simple wet method and a controlled carbonization process. The synthesized material was characterized using FTIR and Raman spectroscopy to confirm its structural features and interactions. The CCG/PPy hybrid composite demonstrated outstanding electrochemical properties, including a high specific capacity of 503 mAh g<sup>−1</sup> after 200 cycles at a current density of 1 A g<sup>−1</sup>, surpassing other biomass-based anode materials. Furthermore, it exhibited rapid charge/discharge kinetics (up to 2 A g<sup>−1</sup>) and exceptional long-term cycling stability. These results are attributed to the synergistic combination of CCG's porous structure, which enhances ion transport, and PPy's conductive network, which improves charge transfer. This work highlights the potential of biowaste-derived materials, such as CCG, in advancing next-generation energy storage technologies by providing sustainable and efficient solutions for LIB applications.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"641 ","pages":"Article 236894"},"PeriodicalIF":8.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747003","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}

引用次数: 0

The novel use of foam-based solutions for the containment of thermal runaway sidewall rupture

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-04-01 DOI: 10.1016/j.jpowsour.2025.236822

Jonathan Peter Charles Allen, Zarin Miah, Simon Jones, James Marco

Prevention of thermal runaway propagation is a key requirement of battery pack safety across transport sectors, particularly for aerospace. Sidewall rupture is the most violent and likely failure to result in propagation but is less studied as it is difficult to initiate reliably and repeatably. Recent studies that reliably initiate sidewall rupture have allowed testing of interstitial materials under such failure modes. Our research studies the novel application of interstitial foam materials under sidewall rupture. Materials were found that successfully contain sidewall rupture and prevent thermal runaway propagation. Additionally, sufficient thermal insulation was provided to allow cells immediately proximate to a runaway to maintain their open circuit potential, potentially allowing recovery and continued future operation of adjacent cells. An additional study, documented here, was included on the effect of lid-plates on solutions to explore more representative experimental methods. Removing lid-plates was found to allow lower density foam materials to be competitive and outperform higher densities.

{"title":"The novel use of foam-based solutions for the containment of thermal runaway sidewall rupture","authors":"Jonathan Peter Charles Allen, Zarin Miah, Simon Jones, James Marco","doi":"10.1016/j.jpowsour.2025.236822","DOIUrl":"10.1016/j.jpowsour.2025.236822","url":null,"abstract":"<div><div>Prevention of thermal runaway propagation is a key requirement of battery pack safety across transport sectors, particularly for aerospace. Sidewall rupture is the most violent and likely failure to result in propagation but is less studied as it is difficult to initiate reliably and repeatably. Recent studies that reliably initiate sidewall rupture have allowed testing of interstitial materials under such failure modes. Our research studies the novel application of interstitial foam materials under sidewall rupture. Materials were found that successfully contain sidewall rupture and prevent thermal runaway propagation. Additionally, sufficient thermal insulation was provided to allow cells immediately proximate to a runaway to maintain their open circuit potential, potentially allowing recovery and continued future operation of adjacent cells. An additional study, documented here, was included on the effect of lid-plates on solutions to explore more representative experimental methods. Removing lid-plates was found to allow lower density foam materials to be competitive and outperform higher densities.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"641 ","pages":"Article 236822"},"PeriodicalIF":8.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747585","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}

引用次数: 0

Quenching of spent graphite: Upcycling regeneration with tailoring subsurface and in-plane defects towards high-rate properties

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-03-31 DOI: 10.1016/j.jpowsour.2025.236890

Jiexiang Li , Hanyu Zhou , Yasi Gou, Zihao Zeng, Bing Wang, Wei Sun, Yue Yang, Peng Ge

Attracted by short processes and low costs, strategies for directly regenerating spent electrode materials receive considerable attention. As the main anode of lithium-ion batteries, numerous spent graphite materials stack without suitable treatments, leading to serious environmental pollution and resource waste. Although progress has been made in recycling spent graphite, challenges such as high energy consumption and suboptimal sub-surface structural integrity remain unresolved. In this study, we successfully tailor the sub-surface traits, including pore distribution and in-plane defects, by employing short-time sintering and quenching techniques. As a Li-storage anode, the regenerated samples display a considerable capacity of approximately 300 mAh∙g⁻¹ after 500 cycles at 1.0C. Even at 5.0C, their fast-charge capacity reaches up to 258 mAh∙g⁻¹. Detailed electrochemical and kinetic analyses reveal that the introduction of interlayer gaps broadens ion-shuttling pathways by increasing the diffusion coefficient, while the designed in-plane defects provide effective growth sites for Li deposition. This facilitates the transformation from Li dendrites to Li particles, enhancing battery performance and safety. Consequently, this work sheds light on the role of sub-surface traits and offers effective strategies for the upcycling and regeneration of spent graphite, contributing to more sustainable lithium-ion battery technologies.

{"title":"Quenching of spent graphite: Upcycling regeneration with tailoring subsurface and in-plane defects towards high-rate properties","authors":"Jiexiang Li , Hanyu Zhou , Yasi Gou, Zihao Zeng, Bing Wang, Wei Sun, Yue Yang, Peng Ge","doi":"10.1016/j.jpowsour.2025.236890","DOIUrl":"10.1016/j.jpowsour.2025.236890","url":null,"abstract":"<div><div>Attracted by short processes and low costs, strategies for directly regenerating spent electrode materials receive considerable attention. As the main anode of lithium-ion batteries, numerous spent graphite materials stack without suitable treatments, leading to serious environmental pollution and resource waste. Although progress has been made in recycling spent graphite, challenges such as high energy consumption and suboptimal sub-surface structural integrity remain unresolved. In this study, we successfully tailor the sub-surface traits, including pore distribution and in-plane defects, by employing short-time sintering and quenching techniques. As a Li-storage anode, the regenerated samples display a considerable capacity of approximately 300 mAh∙g<sup>−1</sup> after 500 cycles at 1.0C. Even at 5.0C, their fast-charge capacity reaches up to 258 mAh∙g<sup>−1</sup>. Detailed electrochemical and kinetic analyses reveal that the introduction of interlayer gaps broadens ion-shuttling pathways by increasing the diffusion coefficient, while the designed in-plane defects provide effective growth sites for Li deposition. This facilitates the transformation from Li dendrites to Li particles, enhancing battery performance and safety. Consequently, this work sheds light on the role of sub-surface traits and offers effective strategies for the upcycling and regeneration of spent graphite, contributing to more sustainable lithium-ion battery technologies.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"641 ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737311","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}

引用次数: 0

Fabricating sustainable electrodes for symmetric supercapacitors using lignosulfonate with two-step CO2 activation and plasma-assisted treatments

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-03-31 DOI: 10.1016/j.jpowsour.2025.236887

You-Ren Lin , Jian-Zhang Chen , Cindy Rusly , Hsun-Yi Chen , Feng-Cheng Chang

In this study, lignosulfonate (LS) is utilized as a precursor to prepare lignosulfonate-activated carbon (LSAC) through a two-step CO₂ physical activation process. The LSAC is then employed as an electrode material and is assembled with PVA/H₂SO₄ gel electrolyte to fabricate supercapacitors. The experimental results reveal that the carbonization temperature, pre-oxidation treatment, and activation time considerably influence the pore characteristics of LSAC, thereby affecting its subsequent electrochemical performance. The optimal conditions, without pre-oxidation, carbonization at 700 °C, activation at 800 °C, and a 90 min activation time, LSAC achieves the highest specific surface area (1015.33 m²/g) and a carbon content of 83.110 %. The electrochemical testing demonstrates that the system attains the highest areal capacitance (646.78 mF/cm²) at a current of 0.25 mA, an energy density of 57.491 μWh/cm², a power density of 0.0667 mW/cm², and 99.13 % of capacitance retention after 4000 charge-discharge cycles. This research highlights the potential for LSAC to be applied in energy storage devices, thereby enhancing the recycling value of industrial lignin.

{"title":"Fabricating sustainable electrodes for symmetric supercapacitors using lignosulfonate with two-step CO2 activation and plasma-assisted treatments","authors":"You-Ren Lin , Jian-Zhang Chen , Cindy Rusly , Hsun-Yi Chen , Feng-Cheng Chang","doi":"10.1016/j.jpowsour.2025.236887","DOIUrl":"10.1016/j.jpowsour.2025.236887","url":null,"abstract":"<div><div>In this study, lignosulfonate (LS) is utilized as a precursor to prepare lignosulfonate-activated carbon (LSAC) through a two-step CO<sub>2</sub> physical activation process. The LSAC is then employed as an electrode material and is assembled with PVA/H<sub>2</sub>SO<sub>4</sub> gel electrolyte to fabricate supercapacitors. The experimental results reveal that the carbonization temperature, pre-oxidation treatment, and activation time considerably influence the pore characteristics of LSAC, thereby affecting its subsequent electrochemical performance. The optimal conditions, without pre-oxidation, carbonization at 700 °C, activation at 800 °C, and a 90 min activation time, LSAC achieves the highest specific surface area (1015.33 m<sup>2</sup>/g) and a carbon content of 83.110 %. The electrochemical testing demonstrates that the system attains the highest areal capacitance (646.78 mF/cm<sup>2</sup>) at a current of 0.25 mA, an energy density of 57.491 μWh/cm<sup>2</sup>, a power density of 0.0667 mW/cm<sup>2</sup>, and 99.13 % of capacitance retention after 4000 charge-discharge cycles. This research highlights the potential for LSAC to be applied in energy storage devices, thereby enhancing the recycling value of industrial lignin.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"641 ","pages":"Article 236887"},"PeriodicalIF":8.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747566","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}

引用次数: 0

Rapid synthesis of carbon-supported CoS2/CoSe2 heterostructures by magnetic induction heating for efficient hydrogen evolution reaction in acidic media

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-03-31 DOI: 10.1016/j.jpowsour.2025.236897

Bingzhe Yu , John Tressel , Tianchen Cui , Dingjie Pan , Davida Briana DuBois , Colton Jones , Bryan Hou , Kiley Mayford , Qiming Liu , Frank Bridges , Shaowei Chen

Transition metal dichalcogenides have been recognized as promising alternative electrocatalysts to precious metal-based benchmarks for hydrogen evolution reaction (HER), owing to their unique structures, tunable electronic properties and low costs. However, the performance is generally compromised by the sluggish electron-transfer kinetics and limited electrical conductivity. Herein, nanocomposites consisting of CoS₂/CoSe₂ heterostructures supported on N-doped carbon are prepared via magnetic induction heating at 200 A for only 10 s and display an apparent HER activity in 0.5 M H₂SO₄. Among the obtained CoS₂/CoSe₂/NC series, the sample with an S:Se atomic ratio of ca. 1:1 exhibits the best performance, requiring a low overpotential of −187 mV to reach the current density of 10 mA cm⁻², with a low Tafel slope of 40.7 mV dec⁻¹, markedly outperforming the CoS₂ and CoSe₂ counterparts. This is ascribed to the optimized electronic structure and enhanced electrical conductivity due to the formation of the CoS₂/CoSe₂ heterostructures, as evidenced in microscopic and spectroscopic measurements. Consistent results are obtained in theoretical studies based on density functional theory calculations. Results from this work highlight the unique potential of heterostructured materials as viable catalysts for electrochemical energy technologies.

{"title":"Rapid synthesis of carbon-supported CoS2/CoSe2 heterostructures by magnetic induction heating for efficient hydrogen evolution reaction in acidic media","authors":"Bingzhe Yu , John Tressel , Tianchen Cui , Dingjie Pan , Davida Briana DuBois , Colton Jones , Bryan Hou , Kiley Mayford , Qiming Liu , Frank Bridges , Shaowei Chen","doi":"10.1016/j.jpowsour.2025.236897","DOIUrl":"10.1016/j.jpowsour.2025.236897","url":null,"abstract":"<div><div>Transition metal dichalcogenides have been recognized as promising alternative electrocatalysts to precious metal-based benchmarks for hydrogen evolution reaction (HER), owing to their unique structures, tunable electronic properties and low costs. However, the performance is generally compromised by the sluggish electron-transfer kinetics and limited electrical conductivity. Herein, nanocomposites consisting of CoS<sub>2</sub>/CoSe<sub>2</sub> heterostructures supported on N-doped carbon are prepared via magnetic induction heating at 200 A for only 10 s and display an apparent HER activity in 0.5 M H<sub>2</sub>SO<sub>4</sub>. Among the obtained CoS<sub>2</sub>/CoSe<sub>2</sub>/NC series, the sample with an S:Se atomic ratio of ca. 1:1 exhibits the best performance, requiring a low overpotential of −187 mV to reach the current density of 10 mA cm<sup>−2</sup>, with a low Tafel slope of 40.7 mV dec<sup>−1</sup>, markedly outperforming the CoS<sub>2</sub> and CoSe<sub>2</sub> counterparts. This is ascribed to the optimized electronic structure and enhanced electrical conductivity due to the formation of the CoS<sub>2</sub>/CoSe<sub>2</sub> heterostructures, as evidenced in microscopic and spectroscopic measurements. Consistent results are obtained in theoretical studies based on density functional theory calculations. Results from this work highlight the unique potential of heterostructured materials as viable catalysts for electrochemical energy technologies.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"641 ","pages":"Article 236897"},"PeriodicalIF":8.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746983","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}

引用次数: 0

Recent advancements and perspectives in conductive hydrogel-based flexible all-in-one supercapacitors

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-03-31 DOI: 10.1016/j.jpowsour.2025.236902

Hui Song, Cheng Huang, Benping Zheng, Haotong Li

Flexible supercapacitors (FSCs) have been widely studied due to their advantages such as high power density, long cycle life, high safety, and excellent mechanical properties. Compared with the traditional "sandwich" structure FSCs, flexible all-in-one supercapacitors (FASCs) exhibit lower interface resistance and enhanced deformation resistance, making them more suitable for flexible wearable electronics. Conductive hydrogels (CHs), which combine high electrical conductivity with robust mechanical properties, show unique potential in supercapacitor (SC) applications. However, a comprehensive review of CH applications in FASCs remains lacking. This review summarizes recent preparation methods and multifunctional properties of typical CH-based FASCs. First, the fundamental concepts and preparation strategies of FASCs are introduced. Subsequently, their functional characteristics-including electrochemical performance, deformation tolerance, self-healing capability, wide-temperature adaptability, and biodegradability-are systematically discussed. Furthermore, applications of FASCs in wearable electronic devices are explored. Finally, challenges and future research directions for CH-based FASCs are outlined.

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引用次数: 0

Stablized PEO/covalent organic framework hybrids with improved Li+ transfer capability for solid state lithium metal batteries

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-03-31 DOI: 10.1016/j.jpowsour.2025.236900

Qi Li, Fayou Tian, Liping Lu, Qing Lv, Xinchao Shang, Zhongtao Li, Mingbo Wu

Polyethylene oxide (PEO) electrolytes are widely used in lithium metal batteries (LMBs) due to their high safety and good flexibility. However, poor ion transport performance and interfacial stability limit its practical application. In this study, a covalent organic polymer (CPTP) was designed as a multifunctional material to be combined with PEO-based electrolytes for the preparation of a high-performance solid polymer electrolyte. The addition of CPTP promotes the dissociation of lithium salt through the C=N sites in the structure, and reduces the crystallinity of PEO to provides additional lithium transport pathways, thus enhancing the kinetics of lithium ion migration. More importantly, CPTP significantly enhances the interfacial stability of PEO/CPTP composite electrolyte/Li anode, promoting the formation of a stable SEI layer on the surface of the lithium metal electrode. The PEO/CPTP electrolyte has a lithium ion migration number of 0.59, and the Li//PEO/CPTP//Li batteries can stably operate for more than 1000 h with a polarization voltage of less than 0.2 mV. The fabricated all-solid-state Li//PEO/CPTP//LiFePO₄ lithium metal batteries can run 300 cycles with 81 % capacity reservation at 0.2 C, which could ascribe to the regulat phase stability in lithium metal batteries.

{"title":"Stablized PEO/covalent organic framework hybrids with improved Li+ transfer capability for solid state lithium metal batteries","authors":"Qi Li, Fayou Tian, Liping Lu, Qing Lv, Xinchao Shang, Zhongtao Li, Mingbo Wu","doi":"10.1016/j.jpowsour.2025.236900","DOIUrl":"10.1016/j.jpowsour.2025.236900","url":null,"abstract":"<div><div>Polyethylene oxide (PEO) electrolytes are widely used in lithium metal batteries (LMBs) due to their high safety and good flexibility. However, poor ion transport performance and interfacial stability limit its practical application. In this study, a covalent organic polymer (CPTP) was designed as a multifunctional material to be combined with PEO-based electrolytes for the preparation of a high-performance solid polymer electrolyte. The addition of CPTP promotes the dissociation of lithium salt through the C=N sites in the structure, and reduces the crystallinity of PEO to provides additional lithium transport pathways, thus enhancing the kinetics of lithium ion migration. More importantly, CPTP significantly enhances the interfacial stability of PEO/CPTP composite electrolyte/Li anode, promoting the formation of a stable SEI layer on the surface of the lithium metal electrode. The PEO/CPTP electrolyte has a lithium ion migration number of 0.59, and the Li//PEO/CPTP//Li batteries can stably operate for more than 1000 h with a polarization voltage of less than 0.2 mV. The fabricated all-solid-state Li//PEO/CPTP//LiFePO<sub>4</sub> lithium metal batteries can run 300 cycles with 81 % capacity reservation at 0.2 C, which could ascribe to the regulat phase stability in lithium metal batteries.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"641 ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737758","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}

引用次数: 0

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