Pub Date : 2026-05-01Epub Date: 2026-02-05DOI: 10.1016/j.jelechem.2026.119929
Yinlong Huang , Jie He , Lei Zhou , Jiaxin He , Yongjiang Wang , Lin Li , Dingyu Yang , Xumei Cui , Peng Cao , Yanwei Sui , Wen Zhang
Low-temperature combustion synthesis (LTCS) enables a scalable, energy-efficient route for synthesizing high-performance cathode materials, yet its optimization for LiNi0.5Mn1.5O4 (LNMO) – A high-voltage cathode material – Remains underexplored. We employed LTCS, guided by propellant thermochemistry, to synthesize pristine and Ti-doped LNMO (LiNi0.5Mn1.5-xTixO4, x = 0.01, 0.03, 0.05), investigating the effects of annealing (700–900 °C, 5–7 h) and Ti doping on structural and electrochemical properties. Annealing at 800 °C for 6 h yielded pristine LNMO with a disordered Fdm spinel structure, delivering 92.51 mAh/g at 20C. Ti doping at x = 0.03 produced uniform octahedral grains (152 nm) and reduced Mn3+ content (25%), achieving 132.9 mAh/g at 0.1C and 91.1% capacity retention after 200 cycles at 1C. These enhancements stem from the substitution of Ti4+ in the lattice, which stabilizes the structure and mitigates the dissolution of Mn3+. This optimized LTCS protocol provides a cost-effective and scalable approach for high-voltage LNMO cathodes, advancing the development of next-generation lithium-ion batteries
{"title":"Enhancing high-voltage LiNi0.5Mn1.5O4 cathodes via low-temperature combustion and Ti doping","authors":"Yinlong Huang , Jie He , Lei Zhou , Jiaxin He , Yongjiang Wang , Lin Li , Dingyu Yang , Xumei Cui , Peng Cao , Yanwei Sui , Wen Zhang","doi":"10.1016/j.jelechem.2026.119929","DOIUrl":"10.1016/j.jelechem.2026.119929","url":null,"abstract":"<div><div>Low-temperature combustion synthesis (LTCS) enables a scalable, energy-efficient route for synthesizing high-performance cathode materials, yet its optimization for LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> (LNMO) – A high-voltage cathode material – Remains underexplored. We employed LTCS, guided by propellant thermochemistry, to synthesize pristine and Ti-doped LNMO (LiNi<sub>0.5</sub>Mn<sub>1.5-x</sub>Ti<sub>x</sub>O<sub>4</sub>, x = 0.01, 0.03, 0.05), investigating the effects of annealing (700–900 °C, 5–7 h) and Ti doping on structural and electrochemical properties. Annealing at 800 °C for 6 h yielded pristine LNMO with a disordered Fd<span><math><mover><mn>3</mn><mo>¯</mo></mover></math></span>m spinel structure, delivering 92.51 mAh/g at 20C. Ti doping at x = 0.03 produced uniform octahedral grains (152 nm) and reduced Mn<sup>3+</sup> content (25%), achieving 132.9 mAh/g at 0.1C and 91.1% capacity retention after 200 cycles at 1C. These enhancements stem from the substitution of Ti<sup>4+</sup> in the lattice, which stabilizes the structure and mitigates the dissolution of Mn<sup>3+</sup>. This optimized LTCS protocol provides a cost-effective and scalable approach for high-voltage LNMO cathodes, advancing the development of next-generation lithium-ion batteries</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1008 ","pages":"Article 119929"},"PeriodicalIF":4.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-05-01Epub Date: 2026-02-04DOI: 10.1016/j.jelechem.2026.119925
Jinkun Bai , Chongyang Zhao , Kangrong Lai , Guoqing Zhao , Guowei Chen , Lijie Ci , Lin Zhang
Solid-state lithium metal batteries (SSLMBs) are regarded as promising next-generation energy storage systems due to their high energy density and improved safety. Compared with liquid electrolytes, solid-state electrolytes effectively suppress lithium dendrite growth and offer superior thermal and electrochemical stability. However, polymer solid electrolytes suffer from low ionic conductivity, while sulfide electrolytes are limited by poor air stability and interfacial incompatibility. Herein, a novel sulfide composite electrolyte (CSE) is developed by incorporating a glass–ceramic sulfide electrolyte, Li7P3S11 (LPS), into a poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) matrix with LiTFSI, forming a flexible LPS/PVDF-HFP/LiTFSI composite film. This composite structure simultaneously enhances air stability, mechanical flexibility, and electrochemical stability. The introduction of LPS promotes lithium salt dissociation and increases the amorphous phase content of the polymer, resulting in improved lithium-ion transport. An optimal ionic conductivity of 3.01 × 10−4 S cm−1 is achieved at an LPS content of 3 wt%. The optimized CSE enables stable cycling of a Li|Li symmetric cell for over 1200 h at 0.1 mA cm−2 and delivers a reversible capacity of 160 mAh g−1 after 150 cycles in a LiFePO4|Li full cell.
固态锂金属电池（sslmb）由于其高能量密度和更高的安全性，被认为是有前途的下一代储能系统。与液体电解质相比，固态电解质有效地抑制了锂枝晶的生长，并提供了更好的热稳定性和电化学稳定性。然而，聚合物固体电解质的离子电导率较低，而硫化物电解质则受到空气稳定性差和界面不相容的限制。本文通过将玻璃陶瓷硫化物电解质Li7P3S11 （LPS）掺入含有LiTFSI的聚偏氟乙烯-共六氟丙烯（PVDF-HFP）基质中，形成柔性的LPS/PVDF-HFP/LiTFSI复合膜，制备了一种新型的硫化物复合电解质（CSE）。这种复合结构同时提高了空气稳定性、机械柔韧性和电化学稳定性。LPS的引入促进了锂盐的解离，增加了聚合物的非晶相含量，从而改善了锂离子的输运。在LPS含量为3 wt%时，离子电导率达到3.01 × 10−4 S cm−1。优化后的CSE能够在0.1 mA cm−2下稳定循环1200h以上，并在LiFePO4|Li充满电池中循环150次后提供160 mAh g−1的可逆容量。
{"title":"Stable Li7P3S11 Sulfide/PVDF-HFP composited solid-state electrolyte for solid-state Lithium metal batteries","authors":"Jinkun Bai , Chongyang Zhao , Kangrong Lai , Guoqing Zhao , Guowei Chen , Lijie Ci , Lin Zhang","doi":"10.1016/j.jelechem.2026.119925","DOIUrl":"10.1016/j.jelechem.2026.119925","url":null,"abstract":"<div><div>Solid-state lithium metal batteries (SSLMBs) are regarded as promising next-generation energy storage systems due to their high energy density and improved safety. Compared with liquid electrolytes, solid-state electrolytes effectively suppress lithium dendrite growth and offer superior thermal and electrochemical stability. However, polymer solid electrolytes suffer from low ionic conductivity, while sulfide electrolytes are limited by poor air stability and interfacial incompatibility. Herein, a novel sulfide composite electrolyte (CSE) is developed by incorporating a glass–ceramic sulfide electrolyte, Li<sub>7</sub>P<sub>3</sub>S<sub>11</sub> (LPS), into a poly (vinylidene fluoride-<em>co</em>-hexafluoropropylene) (PVDF-HFP) matrix with LiTFSI, forming a flexible LPS/PVDF-HFP/LiTFSI composite film. This composite structure simultaneously enhances air stability, mechanical flexibility, and electrochemical stability. The introduction of LPS promotes lithium salt dissociation and increases the amorphous phase content of the polymer, resulting in improved lithium-ion transport. An optimal ionic conductivity of 3.01 × 10<sup>−4</sup> S cm<sup>−1</sup> is achieved at an LPS content of 3 wt%. The optimized CSE enables stable cycling of a Li|Li symmetric cell for over 1200 h at 0.1 mA cm<sup>−2</sup> and delivers a reversible capacity of 160 mAh g<sup>−1</sup> after 150 cycles in a LiFePO<sub>4</sub>|Li full cell.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1008 ","pages":"Article 119925"},"PeriodicalIF":4.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
High efficiency and corrosion resistant oxygen evolution reaction (OER) electrocatalysts for seawater electrolysis are still key challenges. Here, ascorbic acid (AA) is used to modify NiFe-LDH to inhibit the chlorine evolution reaction (CER) in alkaline seawater. The nickel‑iron layered double hydroxide composite material modified by ascorbic acid molecules shows excellent electrocatalytic oxygen evolution reaction activity. In a 1 M concentration potassium hydroxide alkaline electrolyte system, when the current density of this material reaches 50 mA cm−2, the overpotential is only 241 mV, while in alkaline seawater environment, the corresponding overpotential slightly increases to 276 mV. It is worth noting that this catalytic system exhibits excellent long-term operation stability. Under the current density condition of 50 mA cm−2, its catalytic activity can be stably maintained for more than one hundred hours. The significant enhancement of this performance is mainly attributed to the better electrochemical reaction kinetics characteristics at the interface, as well as the effective chloride ion shielding layer constructed by introducing ascorbic acid, the latter of which can effectively prevent corrosive ions from attacking the catalytic active sites. The dual roles accelerate the OER of seawater electrolysis and prevent side reactions. The research results help in designing surface engineering electrocatalysts with high OER activity and chloride corrosion resistance.
高效耐腐蚀的析氧反应（OER）电催化剂仍然是海水电解的关键挑战。本研究利用抗坏血酸（AA）修饰NiFe-LDH，抑制碱性海水中的析氯反应（CER）。抗坏血酸修饰的镍铁层状双氢氧化物复合材料表现出优异的电催化析氧活性。在1 M浓度的氢氧化钾碱性电解质体系中，当该材料的电流密度达到50 mA cm−2时，过电位仅为241 mV，而在碱性海水环境中，相应的过电位略有增加，达到276 mV。值得注意的是，该催化体系表现出优异的长期运行稳定性。在电流密度为50 mA cm−2的条件下，其催化活性可稳定保持100小时以上。该性能的显著增强主要得益于界面处更好的电化学反应动力学特性，以及引入抗坏血酸构建有效的氯离子屏蔽层，后者可以有效地阻止腐蚀离子对催化活性位点的攻击。双重作用加速了海水电解的OER，防止了副反应的发生。研究结果有助于设计具有高OER活性和耐氯化物腐蚀的表面工程电催化剂。
{"title":"Molecularly anchored ascorbic acid on NiFe-LDH by shielding effect for efficient seawater electrolysis","authors":"Jihao Liu, Qianqian Dong, Yaru Wen, Yuhao Li, Junjie Wang, Yiming Liu, Yansheng Liu, Zijun Sun, Jinghua Liu, Xiong He","doi":"10.1016/j.jelechem.2026.119927","DOIUrl":"10.1016/j.jelechem.2026.119927","url":null,"abstract":"<div><div>High efficiency and corrosion resistant oxygen evolution reaction (OER) electrocatalysts for seawater electrolysis are still key challenges. Here, ascorbic acid (AA) is used to modify NiFe-LDH to inhibit the chlorine evolution reaction (CER) in alkaline seawater. The nickel‑iron layered double hydroxide composite material modified by ascorbic acid molecules shows excellent electrocatalytic oxygen evolution reaction activity. In a 1 M concentration potassium hydroxide alkaline electrolyte system, when the current density of this material reaches 50 mA cm<sup>−2</sup>, the overpotential is only 241 mV, while in alkaline seawater environment, the corresponding overpotential slightly increases to 276 mV. It is worth noting that this catalytic system exhibits excellent long-term operation stability. Under the current density condition of 50 mA cm<sup>−2</sup>, its catalytic activity can be stably maintained for more than one hundred hours. The significant enhancement of this performance is mainly attributed to the better electrochemical reaction kinetics characteristics at the interface, as well as the effective chloride ion shielding layer constructed by introducing ascorbic acid, the latter of which can effectively prevent corrosive ions from attacking the catalytic active sites. The dual roles accelerate the OER of seawater electrolysis and prevent side reactions. The research results help in designing surface engineering electrocatalysts with high OER activity and chloride corrosion resistance.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1008 ","pages":"Article 119927"},"PeriodicalIF":4.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-15Epub Date: 2026-02-08DOI: 10.1016/j.jelechem.2026.119914
Taeyeon Yoo , Minhwa Oh , Jihyeon Kim, Seonhwa Park, Ponnusamy Nandhakumar, Haesik Yang
We report a low-potential, stable electrochemical biosensor for 3-hydroxybutyrate (BHB) comprising a poly(ethyleneimine) (PEI) layer covalently conjugated with an amine-reactive phenazine ethosulfate mediator (arPES), a 3-hydroxybutyrate dehydrogenase (HBD) layer, and a chitosan overcoat. Screening four redox mediators (arPES, methylene blue, toluidine blue O, and 1,10-phenanthroline-5,6-dione) identified arPES as providing the largest catalytic charge gain, enabling operation at 0.0 V vs Ag/AgCl to suppress interference. Among architectures pairing arPES-conjugated PEI or poly-l-lysine with chitosan or poly(sodium 4-styrenesulfonate) overcoats, the configuration of arPES-conjugated poly(ethyleneimine) and chitosan delivered the highest signal-to-background ratios and superior stability. After optimizing PEI loading, HBD level, and operating potential, the sensor achieved a limit of detection of ∼200 nM and a broad working range (10 nM–10 mM). In spiked human serum, the integrated charge scaled with BHB across clinically relevant concentrations, demonstrating practical applicability. Low-potential operation, covalent mediator conjugation, and the bioprotective chitosan layer collectively minimized mediator loss and enzyme deactivation. This platform affords sensitive and stable BHB quantification suitable for point-of-care testing applications.
我们报道了一种低电位、稳定的3-羟基丁酸（BHB）电化学生物传感器，包括聚乙亚胺（PEI）层与胺反应性苯那嗪乙硫酸盐介质（arPES）共价偶联，3-羟基丁酸脱氢酶（HBD）层和壳聚糖涂层。筛选四种氧化还原介质（arPES、亚甲基蓝、甲苯胺蓝O和1,10-菲罗啉-5,6-二酮）发现，arPES提供最大的催化电荷增益，能够在0.0 V vs Ag/AgCl下工作，抑制干扰。在将arpes偶联PEI或聚赖氨酸与壳聚糖或聚（4-苯乙烯磺酸钠）涂层配对的体系结构中，arpes偶联聚（乙烯亚胺）和壳聚糖的构型具有最高的信本比和优越的稳定性。在优化PEI负载、HBD水平和工作电位后，该传感器的检测限为~ 200 nM，工作范围宽（10 nM - 10 mM）。在加标的人血清中，综合电荷随BHB在临床相关浓度的变化而变化，证明了实际的适用性。低电位操作、共价介体偶联和生物保护壳聚糖层共同减少了介体损失和酶失活。该平台提供敏感和稳定的BHB定量，适用于护理点测试应用。
{"title":"Low-potential, stable electrochemical detection of 3-hydroxybutyrate using phenazine ethosulfate-conjugated poly(ethyleneimine) and a chitosan overcoat","authors":"Taeyeon Yoo , Minhwa Oh , Jihyeon Kim, Seonhwa Park, Ponnusamy Nandhakumar, Haesik Yang","doi":"10.1016/j.jelechem.2026.119914","DOIUrl":"10.1016/j.jelechem.2026.119914","url":null,"abstract":"<div><div>We report a low-potential, stable electrochemical biosensor for 3-hydroxybutyrate (BHB) comprising a poly(ethyleneimine) (PEI) layer covalently conjugated with an amine-reactive phenazine ethosulfate mediator (arPES), a 3-hydroxybutyrate dehydrogenase (HBD) layer, and a chitosan overcoat. Screening four redox mediators (arPES, methylene blue, toluidine blue O, and 1,10-phenanthroline-5,6-dione) identified arPES as providing the largest catalytic charge gain, enabling operation at 0.0 V vs Ag/AgCl to suppress interference. Among architectures pairing arPES-conjugated PEI or poly-<span>l</span>-lysine with chitosan or poly(sodium 4-styrenesulfonate) overcoats, the configuration of arPES-conjugated poly(ethyleneimine) and chitosan delivered the highest signal-to-background ratios and superior stability. After optimizing PEI loading, HBD level, and operating potential, the sensor achieved a limit of detection of ∼200 nM and a broad working range (10 nM–10 mM). In spiked human serum, the integrated charge scaled with BHB across clinically relevant concentrations, demonstrating practical applicability. Low-potential operation, covalent mediator conjugation, and the bioprotective chitosan layer collectively minimized mediator loss and enzyme deactivation. This platform affords sensitive and stable BHB quantification suitable for point-of-care testing applications.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1007 ","pages":"Article 119914"},"PeriodicalIF":4.1,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-15Epub Date: 2026-01-31DOI: 10.1016/j.jelechem.2026.119894
Shuai Gao , Juan Wei , Liu Zhou , Huanhuan Shan , Yuxuan Hu , Zhenxian Wen , Shaoheng Liu , Zhi Zhang , Rui Tan , Zimo Huang , Jie Li , Hong Bo
Gel polymer electrolytes (GPEs) are pivotal for advancing lithium-ion batteries (LIBs), as they uniquely combine the high ionic conductivity of liquid electrolytes with the enhanced stability of all-solid-state electrolytes. However, conventional GPEs often suffer from poor electrode/electrolyte interfacial compatibility under high voltages, which severely hampers their practical implementation in high-voltage LIBs. In this work, we develop an innovative strategy to synthesize a stable fluorine-based gel polymer electrolyte (HPGPEs) via in-situ thermally initiated polymerization: 1,1,1,3,3,3-hexafluoroisopropyl methacrylate (HFIPMA) and pentaerythritol tetraacrylate (PETEA) are copolymerized in a pristine liquid electrolyte (LE) to form a cross-linked polymer network. The fluorine-containing groups of HFIPMA in HPGPEs are crucial for constructing a robust fluorine-rich cathode electrolyte interphase (CEI) layer, which effectively suppresses interfacial degradation during long-term cycling. HPGPEs exhibit superior electrochemical performance, with an ionic conductivity of 3.97 × 10−3 S cm−1 and an expanded electrochemical oxidation stability window of 4.54 V. Consequently, the LiNi0.6Co0.1Mn0.3O2||HPGPEs||graphite pouch full battery retains a high-capacity retention of 90.7% after 500 cycles at 4.35 V and 35 °C, outperforming the commercial LE-based battery (83.3%). This work provides an effective strategy for designing and developing high-performance GPEs, paving the way for the advancement of high-voltage LIBs.
凝胶聚合物电解质（gpe）是发展锂离子电池（lib）的关键，因为它们独特地结合了液体电解质的高离子电导率和全固态电解质的增强稳定性。然而，传统的gpe在高压下往往存在电极/电解质界面相容性差的问题，这严重阻碍了它们在高压lib中的实际应用。在这项工作中，我们开发了一种创新的策略，通过原位热引发聚合来合成稳定的氟基凝胶聚合物电解质（HPGPEs）： 1,1,1,3,3,3-六氟甲基丙烯酸异丙酯（HFIPMA）和季戊四醇四丙烯酸酯（PETEA）在原始液体电解质（LE）中共聚形成交联聚合物网络。HFIPMA在HPGPEs中的含氟基团对于构建坚固的富氟阴极电解质界面（CEI）层至关重要，该层可以有效抑制长期循环过程中的界面降解。HPGPEs具有优异的电化学性能，离子电导率为3.97 × 10−3 S cm−1，扩展的电化学氧化稳定窗口为4.54 V。因此，在4.35 V和35°C下，经过500次循环后，LiNi0.6Co0.1Mn0.3O2|| hhpgpes ||石墨袋电池的高容量保留率为90.7%，优于商用le基电池（83.3%）。这项工作为高性能gpe的设计和开发提供了有效的策略，为高压lib的发展铺平了道路。
{"title":"In-situ fabrication of a stable fluorine-based gel polymer electrolyte for high-voltage lithium-ion batteries","authors":"Shuai Gao , Juan Wei , Liu Zhou , Huanhuan Shan , Yuxuan Hu , Zhenxian Wen , Shaoheng Liu , Zhi Zhang , Rui Tan , Zimo Huang , Jie Li , Hong Bo","doi":"10.1016/j.jelechem.2026.119894","DOIUrl":"10.1016/j.jelechem.2026.119894","url":null,"abstract":"<div><div>Gel polymer electrolytes (GPEs) are pivotal for advancing lithium-ion batteries (LIBs), as they uniquely combine the high ionic conductivity of liquid electrolytes with the enhanced stability of all-solid-state electrolytes. However, conventional GPEs often suffer from poor electrode/electrolyte interfacial compatibility under high voltages, which severely hampers their practical implementation in high-voltage LIBs. In this work, we develop an innovative strategy to synthesize a stable fluorine-based gel polymer electrolyte (HPGPEs) via in-situ thermally initiated polymerization: 1,1,1,3,3,3-hexafluoroisopropyl methacrylate (HFIPMA) and pentaerythritol tetraacrylate (PETEA) are copolymerized in a pristine liquid electrolyte (LE) to form a cross-linked polymer network. The fluorine-containing groups of HFIPMA in HPGPEs are crucial for constructing a robust fluorine-rich cathode electrolyte interphase (CEI) layer, which effectively suppresses interfacial degradation during long-term cycling. HPGPEs exhibit superior electrochemical performance, with an ionic conductivity of 3.97 × 10<sup>−3</sup> S cm<sup>−1</sup> and an expanded electrochemical oxidation stability window of 4.54 V. Consequently, the LiNi<sub>0.6</sub>Co<sub>0.1</sub>Mn<sub>0.3</sub>O<sub>2</sub>||HPGPEs||graphite pouch full battery retains a high-capacity retention of 90.7% after 500 cycles at 4.35 V and 35 °C, outperforming the commercial LE-based battery (83.3%). This work provides an effective strategy for designing and developing high-performance GPEs, paving the way for the advancement of high-voltage LIBs.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1007 ","pages":"Article 119894"},"PeriodicalIF":4.1,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Against the backdrop of the global energy transition toward renewable sources, sodium-ion batteries (SIBs) are regarded as an ideal candidate for large-scale energy storage due to the low cost of sodium. Binary metal sulfides as anode material exhibit superior electrochemical performance compared to their single-metal counterparts; however, they still suffer from rapid capacity degradation due to substantial volume variations during cycling. To address this issue, this study proposes the stabilization of Ni3Bi2S2 on hard carbon fragments (Ni3Bi2S2-C) as a strategy to enhance the structural integrity and prolong the cyclability of the electrode material. Hard carbon not only constructs a high-speed electron conduction network and buffers volume strain but also modulates the electronic structure of Ni3Bi2S2 through interfacial electron interactions, thereby significantly enhancing Na+ transport efficiency and reaction reversibility. The initial reversible capacity of the Ni3Bi2S2-C electrode reaches 350 mAh/g, and after 220 cyclesat 0.5 A/g, it remains at 466.3 mAh/g, exceptional long-term cycling stability of approximately 250 mAh/g capacity after 230 cycles at 2 A/g. This study provides a feasible approach for designing advanced binary metal sulfide/carbon composite anode materials, also offering a generalizable method for developing other transition metal chalcogenide-based energy storage materials.
{"title":"Ni3Bi2S2/C as an advanced sodium-ion batteries anode","authors":"Yang Liu, Liwen Zhang, Shandong Huang, Ting Yue, Yihong Ding, Huilei Jin, Tianbiao Zeng","doi":"10.1016/j.jelechem.2026.119938","DOIUrl":"10.1016/j.jelechem.2026.119938","url":null,"abstract":"<div><div>Against the backdrop of the global energy transition toward renewable sources, sodium-ion batteries (SIBs) are regarded as an ideal candidate for large-scale energy storage due to the low cost of sodium. Binary metal sulfides as anode material exhibit superior electrochemical performance compared to their single-metal counterparts; however, they still suffer from rapid capacity degradation due to substantial volume variations during cycling. To address this issue, this study proposes the stabilization of Ni<sub>3</sub>Bi<sub>2</sub>S<sub>2</sub> on hard carbon fragments (Ni<sub>3</sub>Bi<sub>2</sub>S<sub>2</sub>-C) as a strategy to enhance the structural integrity and prolong the cyclability of the electrode material. Hard carbon not only constructs a high-speed electron conduction network and buffers volume strain but also modulates the electronic structure of Ni<sub>3</sub>Bi<sub>2</sub>S<sub>2</sub> through interfacial electron interactions, thereby significantly enhancing Na<sup>+</sup> transport efficiency and reaction reversibility. The initial reversible capacity of the Ni<sub>3</sub>Bi<sub>2</sub>S<sub>2</sub>-C electrode reaches 350 mAh/g, and after 220 cyclesat 0.5 A/g, it remains at 466.3 mAh/g, exceptional long-term cycling stability of approximately 250 mAh/g capacity after 230 cycles at 2 A/g. This study provides a feasible approach for designing advanced binary metal sulfide/carbon composite anode materials, also offering a generalizable method for developing other transition metal chalcogenide-based energy storage materials.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1007 ","pages":"Article 119938"},"PeriodicalIF":4.1,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-15Epub Date: 2026-01-31DOI: 10.1016/j.jelechem.2026.119878
Han Shen , Lijun Chen , Yue Jing , Xiaorong Meng , Xiaopeng Ma , Lu Li , Yuhang Wang
Designing zinc-affinity copper substrate materials is an effective strategy for creating dendrite-free and zinc-deposition-free anodes for anode-free zinc-ion batteries (AF-AZIB). To further enhance the stability of anode-free copper substrates, a CuxBiy@Ti alloy electrode with a three-dimensional network structure was constructed on titanium foil via constant-current electrodeposition. The effects of electrolyte composition on the morphology, chemical composition, structure, and electrochemical performance of the CuxBiy@Ti electrode were investigated, and the preparation conditions for the CuxBiy@Ti anode were optimized. The results reveal that the CuxBiy@Ti surface comprises a Cu-Bi alloy matrix together with metal oxides; an excess of Bi3+ suppresses the preferential deposition of Cu2+, and a 1:1 Cu2+/Bi3+ ratio in the electrolyte yields the highest alloying degree (CuBi@Ti). In half-cell tests, CuBi@Ti exhibits rapid Zn2+ adsorption/stripping kinetics, excellent hydrogen-evolution suppression and corrosion resistance, enabling stable operation for nearly 2000 h at 1 mA·cm−2. A full CuBi@Ti//MnO2 cell demonstrates robust cycling stability at 2 A·g−1. This work offers a new avenue for designing high-performance electrode materials for anode-free aqueous zinc-ion batteries.
{"title":"Study on highly stable CuxBiy@Ti alloy electrode and its application performance in anode-free zinc ion batteries","authors":"Han Shen , Lijun Chen , Yue Jing , Xiaorong Meng , Xiaopeng Ma , Lu Li , Yuhang Wang","doi":"10.1016/j.jelechem.2026.119878","DOIUrl":"10.1016/j.jelechem.2026.119878","url":null,"abstract":"<div><div>Designing zinc-affinity copper substrate materials is an effective strategy for creating dendrite-free and zinc-deposition-free anodes for anode-free zinc-ion batteries (AF-AZIB). To further enhance the stability of anode-free copper substrates, a Cu<sub>x</sub>Bi<sub>y</sub>@Ti alloy electrode with a three-dimensional network structure was constructed on titanium foil via constant-current electrodeposition. The effects of electrolyte composition on the morphology, chemical composition, structure, and electrochemical performance of the Cu<sub>x</sub>Bi<sub>y</sub>@Ti electrode were investigated, and the preparation conditions for the Cu<sub>x</sub>Bi<sub>y</sub>@Ti anode were optimized. The results reveal that the Cu<sub>x</sub>Bi<sub>y</sub>@Ti surface comprises a Cu-Bi alloy matrix together with metal oxides; an excess of Bi<sup>3+</sup> suppresses the preferential deposition of Cu<sup>2+</sup>, and a 1:1 Cu<sup>2+</sup>/Bi<sup>3+</sup> ratio in the electrolyte yields the highest alloying degree (CuBi@Ti). In half-cell tests, CuBi@Ti exhibits rapid Zn<sup>2+</sup> adsorption/stripping kinetics, excellent hydrogen-evolution suppression and corrosion resistance, enabling stable operation for nearly 2000 h at 1 mA·cm<sup>−2</sup>. A full CuBi@Ti//MnO<sub>2</sub> cell demonstrates robust cycling stability at 2 A·g<sup>−1</sup>. This work offers a new avenue for designing high-performance electrode materials for anode-free aqueous zinc-ion batteries.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1007 ","pages":"Article 119878"},"PeriodicalIF":4.1,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-15Epub Date: 2026-02-11DOI: 10.1016/j.jelechem.2026.119940
Noto Susanto Gultom , Ji-En Liu , Dong-Hau Kuo
Zinc-air batteries (ZABs) represent a promising alternative energy storage solution owing to their elevated energy density, superior safety, and economic nature. This research explores a one-step hydrothermal synthesis of oxygen-incorporated, defect-rich spinel-type (Ni,Co)₃(O,S)₄₋ᵧ, facilitated by a trimetallic Co–Mn–Ni precursor system and in situ CNT integration. XRD and Raman analyses confirmed that the predominant crystal structure was the spinel-type NiCo2S4 phase. Nonetheless, EDS and XPS analyses indicated partial oxygen substitution within the sulfide lattice, associated with the molecular configuration of (Ni, Co)3(O, S)4 for the mixed spinel-type and oxygen-substituted (Ni, Co)3S4. Elemental studies verified that the Mn precursor failed to integrate into the compounds due to its diminished reactivity under moderate hydrothermal conditions; however, its participation in synthesis significantly enhanced catalytic activity by interfering with the precipitation step. The integration of carbon nanotubes did not influence the crystal structure but significantly enhanced electrical conductivity and interfacial charge transport. However, electrochemical evaluations revealed that CMN-S-CNT-10, which incorporated 10 mg of CNT, exhibits superior electrode performance, with a discharge power density of 126.9 mW/cm2, specific capacity of 820 mAh/gZn, and extremely high energy density of 966 mWh/gZn. It exhibits remarkable stability, as evidenced by a 60-h long-term cycling test, during which the charge-discharge voltage gap increased only 0.09 V, indicating exceptional structural stability after incorporating CNTs. This research presents a distinct synthesis strategy that combines defect engineering, oxygen incorporation, and CNT integration in a single step, offering markedly enhanced electrochemical performance of rechargeable ZABs.
{"title":"Hydrothermal integration of carbon nanotube (CNT) into NiCo oxysulfide electrocatalysts for improved rechargeable zinc–air battery performance","authors":"Noto Susanto Gultom , Ji-En Liu , Dong-Hau Kuo","doi":"10.1016/j.jelechem.2026.119940","DOIUrl":"10.1016/j.jelechem.2026.119940","url":null,"abstract":"<div><div>Zinc-air batteries (ZABs) represent a promising alternative energy storage solution owing to their elevated energy density, superior safety, and economic nature. This research explores a one-step hydrothermal synthesis of oxygen-incorporated, defect-rich spinel-type (Ni,Co)₃(O,S)₄₋ᵧ, facilitated by a trimetallic Co–Mn–Ni precursor system and in situ CNT integration. XRD and Raman analyses confirmed that the predominant crystal structure was the spinel-type NiCo<sub>2</sub>S<sub>4</sub> phase. Nonetheless, EDS and XPS analyses indicated partial oxygen substitution within the sulfide lattice, associated with the molecular configuration of (Ni, Co)<sub>3</sub>(O, S)<sub>4</sub> for the mixed spinel-type and oxygen-substituted (Ni, Co)<sub>3</sub>S<sub>4</sub>. Elemental studies verified that the Mn precursor failed to integrate into the compounds due to its diminished reactivity under moderate hydrothermal conditions; however, its participation in synthesis significantly enhanced catalytic activity by interfering with the precipitation step. The integration of carbon nanotubes did not influence the crystal structure but significantly enhanced electrical conductivity and interfacial charge transport. However, electrochemical evaluations revealed that CMN-S-CNT-10, which incorporated 10 mg of CNT, exhibits superior electrode performance, with a discharge power density of 126.9 mW/cm<sup>2</sup>, specific capacity of 820 mAh/g<sub>Zn</sub>, and extremely high energy density of 966 mWh/g<sub>Zn</sub>. It exhibits remarkable stability, as evidenced by a 60-h long-term cycling test, during which the charge-discharge voltage gap increased only 0.09 V, indicating exceptional structural stability after incorporating CNTs. This research presents a distinct synthesis strategy that combines defect engineering, oxygen incorporation, and CNT integration in a single step, offering markedly enhanced electrochemical performance of rechargeable ZABs.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1007 ","pages":"Article 119940"},"PeriodicalIF":4.1,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-15Epub Date: 2026-02-11DOI: 10.1016/j.jelechem.2026.119939
Shuo Li , Zhaoqi Zhang , Junsheng Zhu
To enhance the lithium storage performance of SiOx, a facile ball milling and calcination approach has been developed to prepare a novel SiOx/graphite/nitrogen-doped pitch carbon composite (SiOx/G/N-PC). In this design, graphite and SiOx particles are in close contact, thereby improving the electronic conductivity and mitigating the structural stress effectively. The nitrogen-doped pitch carbon (N-PC) layer can further enhance the structural integrity of the composite. Electrochemical tests show that SiOx/G/N-PC achieves an initial discharge capacity of 658.8 mAh g−1 and an initial Coulombic efficiency of 70.3% at 0.5 A g−1. After 200 cycles, it retains a reversible capacity of 681.1 mAh g−1, which is superior to SiOx, SiOx/graphite (SiOx/G) and SiOx/graphite/pitch carbon (SiOx/G/PC). This work proposes an innovative approach for the systematic design of SiOx-based C composite anodes and contributes meaningful guidance for advanced lithium-ion batteries.
为了提高SiOx的锂存储性能，采用球磨和煅烧的方法制备了一种新型SiOx/石墨/氮掺杂沥青碳复合材料（SiOx/G/N-PC）。在本设计中，石墨和SiOx颗粒紧密接触，从而有效地提高了电子导电性，减轻了结构应力。氮掺杂沥青碳（N-PC）层可以进一步提高复合材料的结构完整性。电化学测试表明，SiOx/G/N-PC在0.5 A G−1条件下的初始放电容量为658.8 mAh G−1，初始库仑效率为70.3%。经过200次循环后，其可逆容量为681.1 mAh g−1，优于SiOx、SiOx/石墨（SiOx/ g）和SiOx/石墨/沥青碳（SiOx/ g /PC）。本研究为siox基C复合阳极的系统设计提供了一种创新的方法，对先进的锂离子电池具有重要的指导意义。
{"title":"Novel design of SiOx/graphite/nitrogen-doped pitch carbon composite for superior lithium storage","authors":"Shuo Li , Zhaoqi Zhang , Junsheng Zhu","doi":"10.1016/j.jelechem.2026.119939","DOIUrl":"10.1016/j.jelechem.2026.119939","url":null,"abstract":"<div><div>To enhance the lithium storage performance of SiO<sub><em>x</em></sub>, a facile ball milling and calcination approach has been developed to prepare a novel SiO<sub><em>x</em></sub>/graphite/nitrogen-doped pitch carbon composite (SiO<sub><em>x</em></sub>/G/N-PC). In this design, graphite and SiO<sub><em>x</em></sub> particles are in close contact, thereby improving the electronic conductivity and mitigating the structural stress effectively. The nitrogen-doped pitch carbon (N-PC) layer can further enhance the structural integrity of the composite. Electrochemical tests show that SiO<sub><em>x</em></sub>/G/N-PC achieves an initial discharge capacity of 658.8 mAh g<sup>−1</sup> and an initial Coulombic efficiency of 70.3% at 0.5 A g<sup>−1</sup>. After 200 cycles, it retains a reversible capacity of 681.1 mAh g<sup>−1</sup>, which is superior to SiO<sub><em>x</em></sub>, SiO<sub><em>x</em></sub>/graphite (SiO<sub><em>x</em></sub>/G) and SiO<sub><em>x</em></sub>/graphite/pitch carbon (SiO<sub><em>x</em></sub>/G/PC). This work proposes an innovative approach for the systematic design of SiO<sub><em>x</em></sub>-based C composite anodes and contributes meaningful guidance for advanced lithium-ion batteries.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1007 ","pages":"Article 119939"},"PeriodicalIF":4.1,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-15Epub Date: 2026-02-03DOI: 10.1016/j.jelechem.2026.119913
Mingfang Zhang, Fengxia Wang, Liang Ma, Xuewen Li, Yan Tang, Guang Yang
L-tryptophan (L-Trp) is the second essential amino acid and is involved in the protein biosynthesis and expression, while its enantiomer of D-tryptophan (D-Trp) exhibits different or opposite biological effects. Hence, the chiral identification of Trp enantiomers is practically significant in life science. Currently, electrochemical technologies have gained increasing interest in enantioselective recognition because of their unique merits of low price, good sensitivity, fast response speed, simple preparation and convenient operation. Herein, we present a review to summarize recent advances in the fabrication of chiral sensors for the electrochemical identification of Trp enantiomers and expound the general design strategies and sensing principles. Moreover, different kinds of chiral selectors for the design of chiral sensing platforms are comprehensively discussed. In addition, challenges and perspectives were also predicted in the design of electrochemical chiral sensors for the enantioselective recognition and detection of Trps.
l -色氨酸（L-Trp）是第二必需氨基酸，参与蛋白质的生物合成和表达，而其对映体d -色氨酸（D-Trp）表现出不同或相反的生物学效应。因此，色氨酸对映体的手性鉴定在生命科学中具有重要的实际意义。目前，电化学技术以其价格低廉、灵敏度好、响应速度快、制备简单、操作方便等独特优点，在对映体选择性识别领域受到越来越多的关注。本文综述了电化学识别色氨酸对映体的手性传感器的研究进展，并阐述了一般的设计策略和传感原理。此外，还全面讨论了用于手性传感平台设计的各种手性选择器。此外，展望了用于Trps对映选择性识别和检测的电化学手性传感器的设计面临的挑战和前景。
{"title":"Recent advances in the fabrication of electrochemical sensing platforms for the enantioselective recognition of tryptophan enantiomers","authors":"Mingfang Zhang, Fengxia Wang, Liang Ma, Xuewen Li, Yan Tang, Guang Yang","doi":"10.1016/j.jelechem.2026.119913","DOIUrl":"10.1016/j.jelechem.2026.119913","url":null,"abstract":"<div><div>L-tryptophan (L-Trp) is the second essential amino acid and is involved in the protein biosynthesis and expression, while its enantiomer of D-tryptophan (D-Trp) exhibits different or opposite biological effects. Hence, the chiral identification of Trp enantiomers is practically significant in life science. Currently, electrochemical technologies have gained increasing interest in enantioselective recognition because of their unique merits of low price, good sensitivity, fast response speed, simple preparation and convenient operation. Herein, we present a review to summarize recent advances in the fabrication of chiral sensors for the electrochemical identification of Trp enantiomers and expound the general design strategies and sensing principles. Moreover, different kinds of chiral selectors for the design of chiral sensing platforms are comprehensively discussed. In addition, challenges and perspectives were also predicted in the design of electrochemical chiral sensors for the enantioselective recognition and detection of Trps.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1007 ","pages":"Article 119913"},"PeriodicalIF":4.1,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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