Journal of Power Sources最新文献_第5页

Stable de/protonation-assisted hydrogen vanadium oxide cathodes for aqueous zinc-ion batteries 水锌离子电池用稳定的质子辅助氢钒氧化物阴极

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-05 DOI: 10.1016/j.jpowsour.2026.239792

Hye-Jin Kim , Yauhen Aniskevich , Junehyuk Son , Kyuwook lhm , Kug-Seung Lee , Hitoshi Yashiro , Eugene A. Streltsov , Seung-Taek Myung

{"title":"Stable de/protonation-assisted hydrogen vanadium oxide cathodes for aqueous zinc-ion batteries","authors":"Hye-Jin Kim , Yauhen Aniskevich , Junehyuk Son , Kyuwook lhm , Kug-Seung Lee , Hitoshi Yashiro , Eugene A. Streltsov , Seung-Taek Myung","doi":"10.1016/j.jpowsour.2026.239792","DOIUrl":"10.1016/j.jpowsour.2026.239792","url":null,"abstract":"<div><div>H<sub>2</sub>V<sub>3</sub>O<sub>8</sub> (denoted as HVO) is introduced to achieve high reversible capacity for aqueous zinc-ion batteries, and we investigate the fundamental charge-storage mechanism. Given the importance of the proton-associated reaction, the crystalline K<sub>2</sub>V<sub>3</sub>O<sub>8</sub> is ion exchanged in HCl aqueous solution to yield HVO nanowires. These nanowires ultimately result in an open porosity, thereby promoting the electrochemical reaction with protons by shortening the ion/electron transport pathways and reducing both the charge-transfer resistance and activation barrier. Comprehensive analyses indicate that the charge-storage process is governed by a reversible de/protonation reaction rather than conventional Zn<sup>2+</sup> intercalation. Notably, the HVO electrode delivers a reversible capacity of 467 mAh g<sup>−1</sup> at 0.1 A g<sup>−1</sup> and retains 96% of its initial capacity over 900 cycles at 1.5 A g<sup>−1</sup>, resulting in superior specific capacity, rate capability, and cyclability, which are attributed to the selected nanostructure. <em>Operando</em> and <em>ex situ</em> characterization confirm the formation and reversibility of intermediate phases such as zinc hydroxytriflate and vanadium oxides. The observed pH evolution during cycling further validates the key role of H<sup>+</sup> in enabling fast charge storage. This acid-engineered amorphous HVO thus demonstrates clear viability as a practical cathode for aqueous zinc-ion batteries.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239792"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387364","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

Ferrocene-catalyzed low-temperature graphitization for green regeneration of spent graphite anodes in lithium-ion batteries 二茂铁催化低温石墨化用于锂离子电池废石墨阳极绿色再生

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-04 DOI: 10.1016/j.jpowsour.2026.239740

Jiahe Liu, Huan Zhang, Jiahao Fan, Shuqi Ren, Ruili Liang, Li Song, Yachao Jin, Mingdao Zhang

{"title":"Ferrocene-catalyzed low-temperature graphitization for green regeneration of spent graphite anodes in lithium-ion batteries","authors":"Jiahe Liu, Huan Zhang, Jiahao Fan, Shuqi Ren, Ruili Liang, Li Song, Yachao Jin, Mingdao Zhang","doi":"10.1016/j.jpowsour.2026.239740","DOIUrl":"10.1016/j.jpowsour.2026.239740","url":null,"abstract":"<div><div>Graphite, as a non-renewable key anode material in lithium-ion batteries, requires efficient and green regeneration to ensure the sustainable development of the battery industry. Conventional recycling methods are hindered by the reliance on highly corrosive reagents or ultra-high temperatures, leading to significant environmental impacts. This study proposes a low-temperature graphitization repair strategy based on ferrocene catalysis. Through iron-based catalyst-promoted carbon layer ordering under mild conditions at 700 °C, the graphitization degree and interlayer structural integrity of the material are significantly enhanced. The regenerated graphite (R-Gra) exhibits excellent electrochemical performance, delivering an initial charge capacity of 359.8 mAh g<sup>−1</sup> at 0.05C, comparable to commercial materials, and retaining 222.7 mAh g<sup>−1</sup> at a high rate of 3C, with improved cycling stability. Systematic structural characterization and kinetic analysis reveal the intrinsic relationship between the catalytic graphitization process and the restoration of electrochemical properties. Furthermore, tracking the migration behavior of Fe species during long-term cycling confirms that Fe/Fe<sub>3</sub>C nanoparticles remain stably encapsulated within the graphite interlayers, without significant dissolution or migration, effectively avoiding side reactions and electrode interface contamination. This work provides an effective low-temperature and green regeneration route for spent graphite anodes, demonstrating both environmental and practical feasibility.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239740"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387368","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

Branched fiber architectures enable a hierarchical porous nanofiber separator for lithium-ion batteries 分支光纤结构使锂离子电池的分层多孔纳米纤维分离器成为可能

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-03 DOI: 10.1016/j.jpowsour.2026.239781

Bin Yang, Ping Xu, Sijia Ai, Na Hu, Jiale He, Yifan Wang, Zhao Zhang, Meiyun Zhang

{"title":"Branched fiber architectures enable a hierarchical porous nanofiber separator for lithium-ion batteries","authors":"Bin Yang, Ping Xu, Sijia Ai, Na Hu, Jiale He, Yifan Wang, Zhao Zhang, Meiyun Zhang","doi":"10.1016/j.jpowsour.2026.239781","DOIUrl":"10.1016/j.jpowsour.2026.239781","url":null,"abstract":"<div><div>Poly (p-phenylene benzobisoxazole) (PBO) nanofiber (PNF) holds great promise for high-safety lithium-ion battery separators due to its exceptional mechanical strength and thermal stability, as well as desirable solution processability derived from its rigid-rod molecular structure. However, the strong π-π interactions among PNFs often lead to excessively dense packing and low porosity in sol-gel derived PNF separators, which severely restricts Li<sup>+</sup> transport. Herein, we design a hierarchical micro-branched fiber architecture as a structural spacer to proactively engineer the pore microstructure. The introduced PBO branched fibers (PBF) effectively disrupt the dense stacking of nanofibers through physical entanglement and steric hindrance, yielding a PNF/branched (PNB) separator with a significantly enhanced porosity of 58%. Benefiting from this well-tailored structure, the PNB separator exhibits remarkable thermal stability with a decomposition temperature above 650 °C, high ionic conductivity of 0.59 mS cm<sup>−1</sup>, and an elevated Li<sup>+</sup> transference number of 0.64. In Li||LFP cells, the PNB separator enables excellent rate capability and cycling stability, retaining 95.6% of its initial capacity after 800 cycles at 0.3 C. This work presents a feasible strategy to optimize the porous structure of nanofibers, offering a promising route for the application of PBO nanofibers in LFP-based battery separators.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239781"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387404","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

Hydrogel-assisted in-situ encapsulation of transition metal sulfides: An effective strategy to significantly boost their electrochemical performance as an anode for sodium-ion batteries 水凝胶辅助过渡金属硫化物的原位封装：作为钠离子电池阳极，显著提高其电化学性能的有效策略

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-03 DOI: 10.1016/j.jpowsour.2026.239735

Peng Wang , Qinliang Li , Yan Zhang , Dandan Hu , Yuheng Sun , Zhi Li , Xiaoya Yuan

{"title":"Hydrogel-assisted in-situ encapsulation of transition metal sulfides: An effective strategy to significantly boost their electrochemical performance as an anode for sodium-ion batteries","authors":"Peng Wang , Qinliang Li , Yan Zhang , Dandan Hu , Yuheng Sun , Zhi Li , Xiaoya Yuan","doi":"10.1016/j.jpowsour.2026.239735","DOIUrl":"10.1016/j.jpowsour.2026.239735","url":null,"abstract":"<div><div>Transition metal sulfides (TMSs) have emerged as one of the most auspicious anode materials for sodium-ion batteries (SIBs), owing to their superior redox reversibility and high theoretical specific capacity. Nevertheless, substantial volume fluctuations during redox reactions often lead to structural degradation, resulting in rapid capacity fading and poor rate capability. Herein, we proposed an innovative strategy that employed the Chinese snack ice-powder derived hydrogel to fabricate a hard-carbon(HC) encapsulated Co<sub>9</sub>S<sub>8</sub> composite (Co<sub>9</sub>S<sub>8</sub>@HC). Microstructural characterizations revealed the formation of C-S covalent bonds at the carbon/cobalt-sulfide interface, which upgraded the interfacial contact from a conventional \"surface contact\" to a \"point-to-surface chemical rivet\" configuration. Electrochemical evaluations demonstrated that the sample carbonized at 800 °C (Co<sub>9</sub>S<sub>8</sub>@HC-800) delivered an outstanding sodium storage capacity of 598.41 mAh g<sup>−1</sup> at 100 mA g<sup>−1</sup>. After 300 cycles, the electrode still delivered a capacity of 578.19 mAh g<sup>−1</sup>, corresponding to a capacity retention of 96.61 %, and exhibited superior rate capability (426.70 mAh g<sup>−1</sup> at 5000 mA g<sup>−1</sup>). These remarkable properties are ascribed to the synergistic effect between the carbon shell and cobalt sulfide, which not only improves electronic conductivity but also effectively accommodates volume changes during repeated cycling, rendering Co<sub>9</sub>S<sub>8</sub>@HC-800 a highly promising advanced anode candidate for SIBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239735"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387405","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 dense and lithiophilic nitrogen-doped carbon nanotube macrofilm as a stable host for Li metal anodes 一种致密的亲锂氮掺杂碳纳米管大膜作为锂金属阳极的稳定宿主

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-04 DOI: 10.1016/j.jpowsour.2026.239700

Menghui Qiu , Yi Liu , Jinhua Xiao , Yanhong Yin , Xianbin Liu , Ting Liu , Yesheng Li

{"title":"A dense and lithiophilic nitrogen-doped carbon nanotube macrofilm as a stable host for Li metal anodes","authors":"Menghui Qiu , Yi Liu , Jinhua Xiao , Yanhong Yin , Xianbin Liu , Ting Liu , Yesheng Li","doi":"10.1016/j.jpowsour.2026.239700","DOIUrl":"10.1016/j.jpowsour.2026.239700","url":null,"abstract":"<div><div>The commercialization of lithium metal batteries is limited by dendrite growth and volume fluctuations. To address this, we designed a freestanding, three-dimensional nitrogen-doped carbon nanotube macrofilm (NCMF) as a lithiophilic host. Synthesized via ammonia-assisted nitridation, this process introduces uniform N functional groups and enhances the structural densification. The modification improves electrical conductivity (419 S cm<sup>−1</sup>) and lithiophilicity, as evidenced by a low nucleation overpotential of 28 mV. The three-dimensional hollow structure provides high conductivity and a large specific surface area to reduce the local current density and alleviates volume change. N-doping further promotes the formation of a stable and uniform solid electrolyte interphase (SEI). The Li–N compounds generated therein, acting synergistically with LiF, facilitate rapid Li<sup>+</sup> transport and inhibit parasitic reactions. Consequently, the NCMF enables uniform Li nucleation and deposition, effectively suppressing dendrite growth. The NCMF-Li symmetric cell exhibits cycling stability over 1200 h with a voltage hysteresis of 20 mV at 0.5 mA cm<sup>−2</sup>. When paired with a LiFePO<sub>4</sub> cathode, the full cell demonstrates improved performance, retaining 87.5 % capacity after 260 cycles at 2C and delivering 108 mAh g<sup>−1</sup> at 3C. This work highlights a strategy combining structural design and interfacial engineering for developing Li metal batteries.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239700"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387639","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

Robust SiC coated C/SiOx composites for high-performance lithium storage 高性能锂存储的坚固SiC涂层C/SiOx复合材料

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-04 DOI: 10.1016/j.jpowsour.2026.239772

Fan Yang , Fei Yin , Fei Zhu , Jing Zheng , Lu Dong , Jiaming Bian , Jian Li , Hua Wang , Zhouyue Jiang , Ping Hu

{"title":"Robust SiC coated C/SiOx composites for high-performance lithium storage","authors":"Fan Yang , Fei Yin , Fei Zhu , Jing Zheng , Lu Dong , Jiaming Bian , Jian Li , Hua Wang , Zhouyue Jiang , Ping Hu","doi":"10.1016/j.jpowsour.2026.239772","DOIUrl":"10.1016/j.jpowsour.2026.239772","url":null,"abstract":"<div><div>Silicon-oxygen-carbon (C/SiO<sub>x</sub>) composites show promising potential as anode materials for lithium-ion batteries due to their versatile synthesis methods, cost-effectiveness, and minimal volume expansion characteristics. However, persistent challenges such as poor cycle stability, conductivity issues, and low initial coulombic efficiency need to be addressed. In this research, a novel C/SiO<sub>x</sub>@SiC composite is developed for lithium-ion battery anodes through a two-stage process involving thermal stirring and composite coating. The high-temperature phase transition of carbon and silicon leads to the formation of SiC, intertwining with C/SiO<sub>x</sub> to effectively encase silicon particles. The resulting C/SiO<sub>x</sub>@SiC material demonstrates outstanding charge and discharge coulombic efficiencies, reaching 98.3%, 98.7%, 99.0%, and 99.6% at current densities of 0.2, 0.5, 1, and 2 A g<sup>−1</sup>, respectively, as well as excellent cycle stability, maintaining a stable capacity of 501.15 mAh·g<sup>−1</sup> after 500 charge-discharge cycles. This highlights the effectiveness of the stirring composite strategy and pitch-derived carbon coating technology in enhancing the overall performance of silicon-oxygen-carbon anodes. These advancements play a significant role in advancing the research and development of high-energy-density lithium-ion battery materials for next-generation applications.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239772"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387642","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

Acid-assisted synthesis of low-defect potassium hexacyanoferrate cathodes for long-lifetime potassium-ion batteries 长寿命钾离子电池用低缺陷六氰高铁酸钾阴极的酸辅助合成

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-06 DOI: 10.1016/j.jpowsour.2026.239809

Xiao Liu , Qisheng Zang , Defei Li , Tong Yuan , Fuqin Zhang , Ming-Chun Zhao

{"title":"Acid-assisted synthesis of low-defect potassium hexacyanoferrate cathodes for long-lifetime potassium-ion batteries","authors":"Xiao Liu , Qisheng Zang , Defei Li , Tong Yuan , Fuqin Zhang , Ming-Chun Zhao","doi":"10.1016/j.jpowsour.2026.239809","DOIUrl":"10.1016/j.jpowsour.2026.239809","url":null,"abstract":"<div><div>Potassium hexacyanoferrate (KFHCF) stands out among Prussian blue analogues (PBAs) as a promising cathode for potassium-ion batteries (PIBs) due to its high capacity and stable crystal structure. However, conventional coprecipitation synthesis often suffers from a rapid and disordered crystallization process, during which the hydrolysis of the <span><math><mrow><msup><mrow><mo>[</mo><mrow><mtext>Fe</mtext><msub><mrow><mo>(</mo><mtext>CN</mtext><mo>)</mo></mrow><mn>6</mn></msub></mrow><mo>]</mo></mrow><mrow><mn>4</mn><mo>‐</mo></mrow></msup></mrow></math></span> ligand introduces numerous lattice vacancies and coordinated water, severely impairing cycling stability and rate performance. To address this, we introduce a simple acid-assisted strategy by incorporating hydrochloric acid into the reaction system. The acidic environment modulates the nucleation and growth kinetics, promoting a dynamic recrystallization process that produces acid-assisted KFHCF, hereafter referred to as H-KFHCF, with high crystallinity and low defect density. This kinetic control not only enhances the structural stability of the crystal framework during cycling but also facilitates potassium-ion diffusion. As a result, H-KFHCF synthesized via this acid-assisted route exhibits excellent cycling stability, retaining a capacity of 70.28 mAh g<sup>−1</sup> after 700 cycles at 0.5C, which corresponds to an ultra-low capacity decay rate of only 0.053% per cycle. This work demonstrates a facile and effective acid-assisted approach that provides valuable insights into the synthesis of high-performance, low-defect PBAs cathode materials.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239809"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387659","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

Unraveling the Zn2+ and H+ ions storage co-insertion kinetics of MnO@rGO composites for high-rate aqueous Zn-ion batteries 高倍率水性锌离子电池MnO@rGO复合材料Zn2+和H+离子存储共插入动力学研究

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-07 DOI: 10.1016/j.jpowsour.2026.239765

Chaeweon Lee , Honggyu Seong , Youngho Jin , June Young Jang , Jaewon Choi

{"title":"Unraveling the Zn2+ and H+ ions storage co-insertion kinetics of MnO@rGO composites for high-rate aqueous Zn-ion batteries","authors":"Chaeweon Lee , Honggyu Seong , Youngho Jin , June Young Jang , Jaewon Choi","doi":"10.1016/j.jpowsour.2026.239765","DOIUrl":"10.1016/j.jpowsour.2026.239765","url":null,"abstract":"<div><div>Manganese oxides are regarded as promising candidates for rechargeable aqueous zinc-ion batteries (AZIBs) due to their high capacity, high operating voltage, low cost, and environmental friendliness. However, irreversible Mn dissolution, sluggish Zn<sup>2+</sup> diffusion kinetics, and poor electronic conductivity severely hinder their long-term cycling stability and rate performance. To address these issues, we adopt a composite strategy by introducing conductive reduced graphene oxide (rGO). The MnO@rGO electrode delivers a high specific capacity of 318 mAh g<sup>−1</sup> at 0.5 A g<sup>−1</sup> and an enhanced rate capability of 117 mAh g<sup>−1</sup> at 1 A g<sup>−1</sup>. Notably, the MnO@rGO exhibits an enhanced cycling stability with stable capacity retention during prolonged charge-discharge cycling. Comprehensive electrochemical analyses, including in situ electrochemical impedance spectroscopy with distribution of relaxation time analysis, capacitive contribution evaluation, and the galvanostatic intermittent titration technique, are conducted to investigate the co-insertion mechanism of Zn<sup>2+</sup> and H<sup>+</sup> ions, confirming enhanced reaction kinetics. This study provides an approach to designing advanced cathode materials for AZIBs and contributes to the development of electrochemical performance analysis for next-generation AZIBs systems.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239765"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387757","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

Near infrared-driven hydrogen evolution via copper bismuth selenide/reduced graphene oxide hybrid for enhanced photo(electro)catalysis 硒化铋铜/还原氧化石墨烯杂化物用于增强光（电）催化的近红外驱动析氢

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-06 DOI: 10.1016/j.jpowsour.2026.239783

Pavithra Rajaethirajlu , Nasrin Banu G , Sekar Karthikeyan , Masaya Matsuoka , Bernaurdshaw Neppolian

{"title":"Near infrared-driven hydrogen evolution via copper bismuth selenide/reduced graphene oxide hybrid for enhanced photo(electro)catalysis","authors":"Pavithra Rajaethirajlu , Nasrin Banu G , Sekar Karthikeyan , Masaya Matsuoka , Bernaurdshaw Neppolian","doi":"10.1016/j.jpowsour.2026.239783","DOIUrl":"10.1016/j.jpowsour.2026.239783","url":null,"abstract":"<div><div>Photoelectrochemical (PEC) water splitting represents a promising solution for sustainable hydrogen production, yet its practical application is constrained by the need for efficient, cost-effective, and durable photoelectrodes. This study introduces copper bismuth selenide (CBS), a binary metal chalcogenide and a p-type semiconductor, as a low-cost and facilely synthesized photoelectrode for PEC water splitting. Marking its first application in this domain, CBS demonstrates strong near-infrared (NIR) absorption, extending its spectral response beyond the visible range to enhance solar energy harvesting and conversion. To address the high recombination rates associated with its narrow bandgap, an in situ-formed reduced graphene oxide (rGO) is integrated into the material, forming a 2D-2D interface. This CBS/rGO composite significantly improves charge separation and carrier transport, mitigating recombination losses and enhancing overall photoelectrode performance. The composite achieved an impressive photocurrent density of −2.68 mA cm<sup>−2</sup> at −0 V<sub>RHE</sub>. Additionally, CBS exhibited strong potential as a bifunctional electrocatalyst for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in electrocatalytic water splitting. These findings establish CBS as a promising candidate for advancing PEC technology, offering a scalable and sustainable approach to clean hydrogen generation.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239783"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388087","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

Cu-doped hierarchical nickel-cobalt sulfide nanoflowers by microwave assisted heating for high-performance asymmetric supercapacitors 微波辅助加热制备cu掺杂层次化镍钴硫化纳米花用于高性能非对称超级电容器

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2026-05-15 Epub Date: 2026-03-03 DOI: 10.1016/j.jpowsour.2026.239757

Kefan Chen , Hetian Feng , Zhichao Li , Ping He , Kui Yang , Chao Li , Liu Liu , Fenglin Zhao , Wanxia Huang

{"title":"Cu-doped hierarchical nickel-cobalt sulfide nanoflowers by microwave assisted heating for high-performance asymmetric supercapacitors","authors":"Kefan Chen , Hetian Feng , Zhichao Li , Ping He , Kui Yang , Chao Li , Liu Liu , Fenglin Zhao , Wanxia Huang","doi":"10.1016/j.jpowsour.2026.239757","DOIUrl":"10.1016/j.jpowsour.2026.239757","url":null,"abstract":"<div><div>Nickel-cobalt sulfide (NCS) has been widely studied as an electrode material for supercapacitors due to its high theoretical specific capacity. However, its slow diffusion kinetics hindered its practical applications. In this work, hierarchical Cu-doped (Ni,Co)<sub>3</sub>S<sub>4</sub> nanoflowers were prepared with microwave assisted heating and Cu addition to address this issue. Through comprehensive experimental investigation and first-principles calculation, microwave radiations were found to accelerate and alter the precipitation kinetics so that Cu doping was realized in (Ni,Co)<sub>3</sub>S<sub>4</sub> lattice and that Cu<sub>9</sub>S<sub>5</sub> was obtained. Meanwhile, Cu ions enhanced the hierarchy of nanoflowers, further promoting the diffusion kinetics. First-principles calculation revealed that Cu doping promoted the adsorption activity of Co atoms and suppressed the Ni-S, Co-S Coulomb interactions, which agreed with the ex-situ XPS analysis in charge-discharge cycles. High specific capacity (259.6 mAh·g<sup>−1</sup> at 1 A g<sup>−1</sup>) and good rate performance (82.2% at 20 A g<sup>−1</sup>) were achieved with a Cu-doped NCS electrode. This work demonstrated an efficient and mild route for the fabrication of hierarchical NCS for supercapacitor applications and provided a comprehensive view of elemental doping effect on NCS supercapacitors. It shed new light on the microwave assisted heating in nanomaterials fabrication and the scaled production of high performance NCS supercapacitors.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"674 ","pages":"Article 239757"},"PeriodicalIF":7.9,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388081","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