Journal of Power Sources最新文献_第10页

A variation on the chemical design through cation deficiency: In the case of Sr2Fe1.5Mo0.5O6-δ as the most promising electrode for symmetrical SOFCs and SOECs

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-02-21 DOI: 10.1016/j.jpowsour.2025.236562

D.A. Osinkin

The prospective use of symmetrical electrochemical cells on solid electrolytes is extensive, encompassing fuel cells, electrolyzers, gas converters, gas separators, etc. However, the successful development of such cells faces a significant challenge: the search for electrode materials that exhibit high stability in oxidizing and reducing atmospheres, high electrode reaction rates, and resistance to redox cycling. In recent years, the complex oxide Sr₂Fe_1.5Mo_0.5O_6-δ has emerged as a promising candidate for use as an electrode material in symmetric cells. One approach to enhancing its performance is cation doping, although this strategy may not be optimal in certain cases due to the potential formation of impurity phases resulting from chemical interactions. An alternative and potentially more advantageous approach is to create a cation deficit. This study presents the initial findings of a comprehensive investigation into the electrochemical behavior of Sr_xFe_1.5Mo_0.5O_6-δ (where x = 2, 1.98, 1.95, 1.92, 1.9). The results demonstrate that strontium deficiency markedly influences the performance of the electrodes. The kinetics of oxygen reduction and hydrogen oxidation have been elucidated. The characteristics of electrochemical reactions in CH₄+CO₂ have been investigated. The outcomes of prolonged testing of electrodes have been presented. Many of the documented findings represent novel observations.

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引用次数: 0

Multi-objective optimal modular design of PEM electrolyzers for efficient and scalable green hydrogen production plants

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-02-21 DOI: 10.1016/j.jpowsour.2025.236510

Abdallah F. El-Hamalawy, Hany E.Z. Farag, Amir Asif

This paper develops a novel modular design for proton exchange membrane electrolyzer (PEME) that divides it into several Separately Controlled Modules (SCMs) to improve its efficiency, extend its operating range, and enhance its coupling with renewable energy sources (RES). The paper also introduces a multi-objective formulation that optimizes the proposed modular design in conjunction with PEME parameters (cathodic pressure, membrane thickness, cell area) and the ratings of the green hydrogen production plant (GHPP) equipment (PEME, AC/DC converter, compressor), aiming to minimize the levelized cost of hydrogen (LCOH) and maximize the hydrogen production. The developed GHPP modular design is numerically validated and compared with the conventional GHPP singular design, showing significant efficiency improvements and an extended operating range, particularly under low-loading conditions. The proposed multi-objective formulation is verified using real historical RES data. The Pareto frontiers are obtained for both modular and singular designs, demonstrating that the proposed modular design reduces the LCOH by 6% and increases hydrogen production by 11% compared to the conventional singular design. Finally, a comprehensive sensitivity analysis was conducted on the RES power profile feeding the GHPP to evaluate the impact of that profile on the optimal GHPP equipment ratings, PEME modular design, and parameters.

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引用次数: 0

Active and passive high-entropy shell enabling high rate and durable sodium manganese hexacyanoferrate cathode for sodium ion batteries

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-02-21 DOI: 10.1016/j.jpowsour.2025.236577

Jingbo Han , Chunyi Xu , Jinhui Zhao , Hongtao Sun , Xin Zhang , Gongkai Wang

Sodium manganese hexacyanoferrate (MnHCF) is a promising cathode material for sodium-ion batteries (SIBs) due to its high theoretical capacity, low cost, and ease of preparation. However, MnHCF typically suffer from poor rate performance and limited cycling stability, primarily due to low electrical conductivity and undesired Jahn-Teller distortions during sodiation and desodiation process. In this study, we successfully employ a co-precipitation method to coat MnHCF with a structurally stable high-entropy hexacyanoferrate (HE-HCF), forming a core-shell structured HE-MnHCF. The high-entropy shell enhances the diffusion kinetics of Na⁺, maintains high capacity even at high current, and significantly improves structural stability by mitigating the Jahn-Teller effect. As a result, HE-MnHCF demonstrates a high reversible capacity of 119.5 mAh g⁻¹ at 0.01 A g⁻¹ and excellent cycling stability, retaining 64.3 % of its capacity after 1000 cycles at 0.5 A g⁻¹. This approach offers a novel strategy for stabilizing electrode materials through high-entropy coatings, paving the way for the advancement of cathode materials in SIBs.

{"title":"Active and passive high-entropy shell enabling high rate and durable sodium manganese hexacyanoferrate cathode for sodium ion batteries","authors":"Jingbo Han , Chunyi Xu , Jinhui Zhao , Hongtao Sun , Xin Zhang , Gongkai Wang","doi":"10.1016/j.jpowsour.2025.236577","DOIUrl":"10.1016/j.jpowsour.2025.236577","url":null,"abstract":"<div><div>Sodium manganese hexacyanoferrate (MnHCF) is a promising cathode material for sodium-ion batteries (SIBs) due to its high theoretical capacity, low cost, and ease of preparation. However, MnHCF typically suffer from poor rate performance and limited cycling stability, primarily due to low electrical conductivity and undesired Jahn-Teller distortions during sodiation and desodiation process. In this study, we successfully employ a co-precipitation method to coat MnHCF with a structurally stable high-entropy hexacyanoferrate (HE-HCF), forming a core-shell structured HE-MnHCF. The high-entropy shell enhances the diffusion kinetics of Na<sup>+</sup>, maintains high capacity even at high current, and significantly improves structural stability by mitigating the Jahn-Teller effect. As a result, HE-MnHCF demonstrates a high reversible capacity of 119.5 mAh g<sup>−1</sup> at 0.01 A g<sup>−1</sup> and excellent cycling stability, retaining 64.3 % of its capacity after 1000 cycles at 0.5 A g<sup>−1</sup>. This approach offers a novel strategy for stabilizing electrode materials through high-entropy coatings, paving the way for the advancement of cathode materials in SIBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"636 ","pages":"Article 236577"},"PeriodicalIF":8.1,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464806","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

Exploring electrocatalysts for oxygen evolution: A comprehensive comparative review in alkaline and acidic medium

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-02-21 DOI: 10.1016/j.jpowsour.2025.236571

Amisha Soni , Sarvatej Kumar Maurya , Manisha Malviya

Water is electrochemically divided to produce hydrogen in an environmentally friendly manner. Two half-reactions contribute to the process of electrolyzing water, with the oxygen evolution reaction (OER) being the one that loses the most energy. Water electrolysis suffers significantly from poor reaction kinetics in its anodic process, making commercial use challenging. Compared to an acidic approach, the range of materials that remain durable under the specific requirements of alkaline water electrolysis is substantially broader. Therefore, identifying OER catalysts that are active, reliable, and economical in acidic media is crucial. Based on the reported overpotential at a current density of 10 mA cm⁻² (η₁₀), this evaluation systematically examines several material classes. A large number of studies are collected, and the OER catalysts documented in the literature to date are outlined. From this perspective, understanding the reaction mechanism and utilizing advanced anode catalysts are both essential, with the former providing insights for structural engineering of materials to enhance catalytic activity. A critical evaluation is then conducted on several recently reported acidic and basic OER electrocatalysts. Finally, a few recommendations for future research into OER catalysts are proposed.

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引用次数: 0

Oxygen vacancy-rich CuBi2O4/Bi2O3 heterostructure and flower-like NiCo layered double hydroxides electrodes for high-performance asymmetric supercapacitors

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-02-21 DOI: 10.1016/j.jpowsour.2025.236558

Wenxiao Zhang , Zize Zhao , Ziyang Zhu , Li Zhang , Xiaohui Xu , Xuemei Chen , Xinyan Wang , Min Lu

The rapid development of high-performance electrode materials for asymmetric supercapacitors (ASCs) needs to solve the bottleneck problem of low energy density. Compared with the positive electrode material, the development of the negative electrode material is relatively lagging and has become one of the key "short board" to limit the energy density of the supercapacitor device. In this study, the oxygen vacancy-rich CuBi₂O₄ nanoparticles are triumphantly anchored on the interface of rod-like Bi₂O₃ after calcination to prepare the heterostructure CuBi₂O₄/Bi₂O₃ (CBO/BO) composites by the combination of simple hydrothermal process and calcination. Due to the unique anchoring mode, heterogeneous structure, and oxygen vacancy introduction, the CBO/BO as the cathode processes the capacitance of 294.7 mAh g⁻¹ at 1 A g⁻¹. In addition, bimetallic NiCo layered double hydroxides (NCL) with the 3D flower-like structure prepared by a one-pot process is used as the positive electrode and the specific capacitance of 186.7 mAh g⁻¹ at 1 A g⁻¹. The assembled water-based NCL//CBO/BO ASC triumphantly amplifies the potential window to 1.7 V, achieves the ultrahigh energy density between 91.8 and 52.9 Wh kg⁻¹ at 850–8500 W kg⁻¹, and maintains the remarkable cycle consistency. Density functional theory calculation fully proves that oxygen vacancy and copper doping can significantly improve the electrochemical performance of electrode materials. Therefore, the research results in this paper afforded a feasible way to further develop asymmetric supercapacitors with ultrahigh energy density.

{"title":"Oxygen vacancy-rich CuBi2O4/Bi2O3 heterostructure and flower-like NiCo layered double hydroxides electrodes for high-performance asymmetric supercapacitors","authors":"Wenxiao Zhang , Zize Zhao , Ziyang Zhu , Li Zhang , Xiaohui Xu , Xuemei Chen , Xinyan Wang , Min Lu","doi":"10.1016/j.jpowsour.2025.236558","DOIUrl":"10.1016/j.jpowsour.2025.236558","url":null,"abstract":"<div><div>The rapid development of high-performance electrode materials for asymmetric supercapacitors (ASCs) needs to solve the bottleneck problem of low energy density. Compared with the positive electrode material, the development of the negative electrode material is relatively lagging and has become one of the key \"short board\" to limit the energy density of the supercapacitor device. In this study, the oxygen vacancy-rich CuBi<sub>2</sub>O<sub>4</sub> nanoparticles are triumphantly anchored on the interface of rod-like Bi<sub>2</sub>O<sub>3</sub> after calcination to prepare the heterostructure CuBi<sub>2</sub>O<sub>4</sub>/Bi<sub>2</sub>O<sub>3</sub> (CBO/BO) composites by the combination of simple hydrothermal process and calcination. Due to the unique anchoring mode, heterogeneous structure, and oxygen vacancy introduction, the CBO/BO as the cathode processes the capacitance of 294.7 mAh g<sup>−1</sup> at 1 A g<sup>−1</sup>. In addition, bimetallic NiCo layered double hydroxides (NCL) with the 3D flower-like structure prepared by a one-pot process is used as the positive electrode and the specific capacitance of 186.7 mAh g<sup>−1</sup> at 1 A g<sup>−1</sup>. The assembled water-based NCL//CBO/BO ASC triumphantly amplifies the potential window to 1.7 V, achieves the ultrahigh energy density between 91.8 and 52.9 Wh kg<sup>−1</sup> at 850–8500 W kg<sup>−1</sup>, and maintains the remarkable cycle consistency. Density functional theory calculation fully proves that oxygen vacancy and copper doping can significantly improve the electrochemical performance of electrode materials. Therefore, the research results in this paper afforded a feasible way to further develop asymmetric supercapacitors with ultrahigh energy density.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"638 ","pages":"Article 236558"},"PeriodicalIF":8.1,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509741","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

A multi-strategy attention regression network for joint prediction of state of health and remaining useful life of lithium-ion batteries using only charging data

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-02-20 DOI: 10.1016/j.jpowsour.2025.236507

Weiguo Feng, Zhongtian Sun, Yilin Han, Nian Cai, Yinghong Zhou

Accurately predicting the state of health (SOH) and remaining useful life (RUL) of lithium-ion batteries is crucial for battery management systems. Most of existing methods rely on complete charging-discharging data, which are possibly limited in the real scenarios since discharging data are easily affected by different operating conditions. To this end, a deep learning framework is designed for joint prediction of SOH and RUL of lithium-ion batteries using only charging data, involving a novel differential scheme for charging data structuring and an elaborately-designed multi-strategy attention regression network (MARN). The MARN is a hybrid dual-branch deep learning network with several self-attentions, consisting of the stages of shared feature extraction, task-specific feature extraction, and prediction. To comprehensively extract temporal features inherent existing in charging data, a multi-strategy attention mechanism is designed to construct three residual modules with different attentions to extract temporal features in different domains. Experiments on the public dataset demonstrate that our proposed method can perform well in joint prediction of SOH and RUL with the performance of coefficients of determination (

R^{2}

) of 0.99 and 0.94 for SOH and RUL tasks, respectively, which is superior to some existing single-state models and a joint prediction model.

{"title":"A multi-strategy attention regression network for joint prediction of state of health and remaining useful life of lithium-ion batteries using only charging data","authors":"Weiguo Feng, Zhongtian Sun, Yilin Han, Nian Cai, Yinghong Zhou","doi":"10.1016/j.jpowsour.2025.236507","DOIUrl":"10.1016/j.jpowsour.2025.236507","url":null,"abstract":"<div><div>Accurately predicting the state of health (SOH) and remaining useful life (RUL) of lithium-ion batteries is crucial for battery management systems. Most of existing methods rely on complete charging-discharging data, which are possibly limited in the real scenarios since discharging data are easily affected by different operating conditions. To this end, a deep learning framework is designed for joint prediction of SOH and RUL of lithium-ion batteries using only charging data, involving a novel differential scheme for charging data structuring and an elaborately-designed multi-strategy attention regression network (MARN). The MARN is a hybrid dual-branch deep learning network with several self-attentions, consisting of the stages of shared feature extraction, task-specific feature extraction, and prediction. To comprehensively extract temporal features inherent existing in charging data, a multi-strategy attention mechanism is designed to construct three residual modules with different attentions to extract temporal features in different domains. Experiments on the public dataset demonstrate that our proposed method can perform well in joint prediction of SOH and RUL with the performance of coefficients of determination (<span><math><msup><mrow><mi>R</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span>) of 0.99 and 0.94 for SOH and RUL tasks, respectively, which is superior to some existing single-state models and a joint prediction model.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"636 ","pages":"Article 236507"},"PeriodicalIF":8.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454219","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

Scalable integrated multilayer anode structure for stable lithium accommodation and enhanced cycling performance in lithium metal batteries

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-02-20 DOI: 10.1016/j.jpowsour.2025.236568

Taejun Kim, Suyeon Baek, Eunji Kim, Namhyeong Kim, Soyeong Choi, Yongseon Kim

The lithium metal anode (LMA) typically undergoes non-uniform lithium plating/stripping processes, causing the plated lithium to grow dendritically, and also suffers from significant variations in electrode thickness. This study addresses the technical challenges of lithium metal anodes by introducing a current collector/dual additives/nylon mesh spacer integrated multilayer anode structure. In this anode structure, the nylon mesh spacer provides lithium accommodation space within the mesh internal space, suppressing thickness variations in the lithium layer regardless of its plated or stripped state. Simultaneously, the two types of additives integrated into the anode structure serve a dual function of promoting uniform lithium plating and facilitating the formation of a stable Li-electrolyte interface, enhancing the operational performance of the LMA even when a carbonate-based ester electrolyte is used. Furthermore, the multilayer anode structure outperformed the commercial graphite anode in capacity, rapid-charging, and cycling operations. The anode can be fabricated with low-cost materials and scalable processes, allowing its potential application in commercial lithium secondary batteries.

锂金属阳极（LMA）通常会经历不均匀的锂电镀/剥离过程，导致电镀的锂呈树枝状生长，而且电极厚度也会出现显著变化。本研究通过引入集流器/双添加剂/尼龙网隔层集成多层阳极结构，解决了锂金属阳极的技术难题。在这种阳极结构中，尼龙网间隔物在网状内部空间提供了锂的容纳空间，从而抑制了锂层厚度的变化，无论其处于电镀或剥离状态。同时，集成到阳极结构中的两种添加剂具有双重功能，既能促进锂镀层的均匀性，又能促进形成稳定的锂电解质界面，即使在使用碳酸酯类电解质的情况下，也能提高 LMA 的工作性能。此外，多层阳极结构在容量、快速充电和循环操作方面都优于商用石墨阳极。这种负极可以用低成本材料和可扩展工艺制作，因此有可能应用于商用锂二次电池。

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引用次数: 0

BaCo0.4Fe0.4Ce0.1Gd0.1O3-δ as positive electrode for reversible protonic ceramic cells

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-02-20 DOI: 10.1016/j.jpowsour.2025.236561

Haoliang Tao , Guoxin Chen , Qiuju Zhang , Junfeng Cui , Fei Wu , Yu Chen , Yang Zhang , Qihang Ren , Wanbing Guan , Liangzhu Zhu

Reversible protonic ceramic cells (RePCC) have attracted significant research attention. We report a novel positive electrode, BaCo_0.4Fe_0.4Ce_0.1Gd_0.1O_3-δ (BCFCeGd), for RePCC applications in this study. Experimental results show the introduction of Ce and Gd in the B site of ABO₃ perovskite increases the capacity for oxygen vacancy formation. DFT calculations support these findings by confirming that the substitution of Ce and Gd lowers the oxygen vacancy formation energy. The measured total conductivity of BCFCeGd is1.91 S cm⁻¹, which is slightly higher than the widely recognized BaCo_0.4Fe_0.4Zr_0.1Y_0.1O_3-δ (BCFZY) electrode of 1.70 S cm⁻¹ at 650 °C. In terms of symmetrical cell test, the polarization resistance of BCFZY is about 30 % higher than the proposed BCFCeGd electrode under similar testing conditions. Moreover, a tested RePCC full cell with BCFCeGd electrode demonstrates a relatively low polarization resistance of 0.08 Ω cm² at 650 °C, thus enabling a peak power density of 935 mW cm⁻² in fuel cell mode. Short-term fuel cell stability test and a 95-cycle test under ±360 mA cm⁻² reversible operation both demonstrate high stability. The combined insights from experimental data and theoretical modeling suggest that BCFCeGd is a highly promising positive electrode for RePCC applications.

{"title":"BaCo0.4Fe0.4Ce0.1Gd0.1O3-δ as positive electrode for reversible protonic ceramic cells","authors":"Haoliang Tao , Guoxin Chen , Qiuju Zhang , Junfeng Cui , Fei Wu , Yu Chen , Yang Zhang , Qihang Ren , Wanbing Guan , Liangzhu Zhu","doi":"10.1016/j.jpowsour.2025.236561","DOIUrl":"10.1016/j.jpowsour.2025.236561","url":null,"abstract":"<div><div>Reversible protonic ceramic cells (RePCC) have attracted significant research attention. We report a novel positive electrode, BaCo<sub>0.4</sub>Fe<sub>0.4</sub>Ce<sub>0.1</sub>Gd<sub>0.1</sub>O<sub>3-δ</sub> (BCFCeGd), for RePCC applications in this study. Experimental results show the introduction of Ce and Gd in the B site of ABO<sub>3</sub> perovskite increases the capacity for oxygen vacancy formation. DFT calculations support these findings by confirming that the substitution of Ce and Gd lowers the oxygen vacancy formation energy. The measured total conductivity of BCFCeGd is1.91 S cm<sup>−1</sup>, which is slightly higher than the widely recognized BaCo<sub>0.4</sub>Fe<sub>0.4</sub>Zr<sub>0.1</sub>Y<sub>0.1</sub>O<sub>3-δ</sub> (BCFZY) electrode of 1.70 S cm<sup>−1</sup> at 650 °C. In terms of symmetrical cell test, the polarization resistance of BCFZY is about 30 % higher than the proposed BCFCeGd electrode under similar testing conditions. Moreover, a tested RePCC full cell with BCFCeGd electrode demonstrates a relatively low polarization resistance of 0.08 Ω cm<sup>2</sup> at 650 °C, thus enabling a peak power density of 935 mW cm<sup>−2</sup> in fuel cell mode. Short-term fuel cell stability test and a 95-cycle test under ±360 mA cm<sup>−2</sup> reversible operation both demonstrate high stability. The combined insights from experimental data and theoretical modeling suggest that BCFCeGd is a highly promising positive electrode for RePCC applications.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"636 ","pages":"Article 236561"},"PeriodicalIF":8.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445279","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

Investigation of fuel cell catalyst dispersion formulations for indirect roll-to-roll fabrication of catalyst coated membranes for proton exchange membrane fuel cells

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-02-20 DOI: 10.1016/j.jpowsour.2025.236457

L. Grebener , A.S. Odungat , Y. Zhu , O. Pasdag , I. Radev , E. Nürenberg , A. Kubina , V. Peinecke , S. Kohsakowski , D. Segets , F. Özcan

In this work, the viability of the indirect process route for the fabrication of catalyst coated membranes for hydrogen fuel cells is demonstrated. This route involves a catalyst dispersion that is cast onto a decal foil before calendering the subsequently obtained dry layer onto a membrane. Three different formulations for the catalyst dispersion were investigated. The results from observations along the whole process chain indicate that these formulations have a strong influence on the dispersion properties, as for the transferability from the decal foil to the catalyst layer and finally the performance of the catalyst in a fuel cell. Remarkable performance was achieved in the electrochemical testing in a realistic scenario with the catalyst layer from a low-viscous dispersion, with a high ionomer-to-catalyst and high alcohol-to-water ratio. The performance was on the same level of a high performance commercially available reference between 0 A/cm² at open circuit potential of 0.964 V for the CMC prepared in this study and 0.931 V for the commercial reference respectively and up to 2 A/cm² at 0.67 V cell voltage. Future potential for optimization lies in the preparation of the catalyst dispersion and calendering step that shapes the pore structures of the catalyst layer and consequently impacts the electrochemical performance.

{"title":"Investigation of fuel cell catalyst dispersion formulations for indirect roll-to-roll fabrication of catalyst coated membranes for proton exchange membrane fuel cells","authors":"L. Grebener , A.S. Odungat , Y. Zhu , O. Pasdag , I. Radev , E. Nürenberg , A. Kubina , V. Peinecke , S. Kohsakowski , D. Segets , F. Özcan","doi":"10.1016/j.jpowsour.2025.236457","DOIUrl":"10.1016/j.jpowsour.2025.236457","url":null,"abstract":"<div><div>In this work, the viability of the indirect process route for the fabrication of catalyst coated membranes for hydrogen fuel cells is demonstrated. This route involves a catalyst dispersion that is cast onto a decal foil before calendering the subsequently obtained dry layer onto a membrane. Three different formulations for the catalyst dispersion were investigated. The results from observations along the whole process chain indicate that these formulations have a strong influence on the dispersion properties, as for the transferability from the decal foil to the catalyst layer and finally the performance of the catalyst in a fuel cell. Remarkable performance was achieved in the electrochemical testing in a realistic scenario with the catalyst layer from a low-viscous dispersion, with a high ionomer-to-catalyst and high alcohol-to-water ratio. The performance was on the same level of a high performance commercially available reference between 0 A/cm<sup>2</sup> at open circuit potential of 0.964 V for the CMC prepared in this study and 0.931 V for the commercial reference respectively and up to 2 A/cm<sup>2</sup> at 0.67 V cell voltage. Future potential for optimization lies in the preparation of the catalyst dispersion and calendering step that shapes the pore structures of the catalyst layer and consequently impacts the electrochemical performance.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"635 ","pages":"Article 236457"},"PeriodicalIF":8.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453879","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

Fast-charging lithium-ion batteries: Synergy of carbon nanotubes and laser ablation

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2025-02-20 DOI: 10.1016/j.jpowsour.2025.236566

Geetika Vennam , Avtar Singh , Alison R. Dunlop , Saiful Islam , Peter J. Weddle , Bianca Yi Wen Mak , Ryan Tancin , Michael C. Evans , Stephen E. Trask , Eric J. Dufek , Andrew M. Colclasure , Donal P. Finegan , Kandler Smith , Andrew N. Jansen , Kevin L. Gering , ZhenZhen Yang , Tanvir R. Tanim

Advancing lithium-ion battery (LiB) technology to achieve 10–15-min extreme fast charging (XFC) while maintaining high energy density and longevity poses a significant challenge. Addressing Li-plating is crucial, as it depletes useable Li, causing deterioration and safety issues. This study explores a holistic approach incorporating Single-Wall Carbon Nanotubes (SWCNTs) and Laser Ablation (LA) to mitigate Li-plating while maintaining high charge acceptance under 10–15-min XFC. SWCNTs enhance the electrical conductivity and mechanical integrity of the positive electrode (PE), reducing overall cell overpotential at high charging rates. Concurrently, LA is applied to negative electrodes (NE) to reduce tortuosity of ion-diffusion pathways and increase surface wettability, improving Li-ion transport. Combining SWCNTs in the PE and LA on the NE, our experimental findings demonstrate a significant reduction in Li-plating and maintained high charge acceptance of ∼84.33 % after 800 5C (12 min) charge cycles for cells having PE with ∼3.3 mAh cm⁻² and NE with 3.9 mAh cm⁻² loadings. This study highlights the potential of combining SWCNTs and LA to address Li-plating in LiBs and opens new avenues for designing battery systems capable of achieving 10–15-min XFC.

{"title":"Fast-charging lithium-ion batteries: Synergy of carbon nanotubes and laser ablation","authors":"Geetika Vennam , Avtar Singh , Alison R. Dunlop , Saiful Islam , Peter J. Weddle , Bianca Yi Wen Mak , Ryan Tancin , Michael C. Evans , Stephen E. Trask , Eric J. Dufek , Andrew M. Colclasure , Donal P. Finegan , Kandler Smith , Andrew N. Jansen , Kevin L. Gering , ZhenZhen Yang , Tanvir R. Tanim","doi":"10.1016/j.jpowsour.2025.236566","DOIUrl":"10.1016/j.jpowsour.2025.236566","url":null,"abstract":"<div><div>Advancing lithium-ion battery (LiB) technology to achieve 10–15-min extreme fast charging (XFC) while maintaining high energy density and longevity poses a significant challenge. Addressing Li-plating is crucial, as it depletes useable Li, causing deterioration and safety issues. This study explores a holistic approach incorporating Single-Wall Carbon Nanotubes (SWCNTs) and Laser Ablation (LA) to mitigate Li-plating while maintaining high charge acceptance under 10–15-min XFC. SWCNTs enhance the electrical conductivity and mechanical integrity of the positive electrode (PE), reducing overall cell overpotential at high charging rates. Concurrently, LA is applied to negative electrodes (NE) to reduce tortuosity of ion-diffusion pathways and increase surface wettability, improving Li-ion transport. Combining SWCNTs in the PE and LA on the NE, our experimental findings demonstrate a significant reduction in Li-plating and maintained high charge acceptance of ∼84.33 % after 800 5C (12 min) charge cycles for cells having PE with ∼3.3 mAh cm<sup>−2</sup> and NE with 3.9 mAh cm<sup>−2</sup> loadings. This study highlights the potential of combining SWCNTs and LA to address Li-plating in LiBs and opens new avenues for designing battery systems capable of achieving 10–15-min XFC.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"636 ","pages":"Article 236566"},"PeriodicalIF":8.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445359","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