Electrochemistry Communications最新文献

In-situ synthesis of zeolitic imidazolate framework-67 (ZIF-67) derived phosphorous-doped cobalt composites as bifunctional catalyst for photo-assisted water electrolysis 原位合成咪唑酸分子筛框架-67 （ZIF-67）衍生的磷掺杂钴复合材料作为光辅助水电解双功能催化剂

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-02-05 DOI: 10.1016/j.elecom.2026.108122

Chun-I Lee , Jhao-Hua Zeng , Jia-He Peng , Yi-Yu Chen , Bing-Joe Hwang , Chun-Jern Pan

A phosphorus modified ZIF-67@TiO₂ photo assisted electrocatalytic heterostructure is developed to elucidate the structure performance relationship and the underlying reaction mechanism in alkaline water electrolysis. The in-situ growth of ZIF-67 on TiO₂ followed by controlled phosphorization induces partial framework reconstruction, generating CoP active sites and Ti³⁺ associated defect states while preserving the CoN coordination network of the MOF. This unique structural evolution enables efficient charge separation, accelerated interfacial electron transfer, and improved utilization of photogenerated carriers.

Electrochemical and optical characterizations reveal that TiO₂ primarily functions as a photogenerated charge supplier, while phosphorized ZIF-67 serves as the dominant electrocatalytic component. Suppressed photoluminescence intensity and enhanced transient photocurrent responses confirm efficient inhibition of charge recombination and rapid photoinduced charge extraction across the heterointerface. As a result, the P-ZIF-67@TiO₂ electrode exhibits markedly reduced overpotentials and charge-transfer resistance for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under illumination.

Mechanistic analysis indicates that CoP sites act as the primary HER active centers following a Volmer-Heyrovsky pathway, whereas in-situ surface reconstruction of CoP into high valence CoOOH species governs OER activity. Consequently, the optimized P-ZIF-67@TiO₂ catalyst delivers a low cell voltage of 1.75 V at 10 mA cm⁻² under illumination and maintains stable operation at 100 mA cm⁻² for over 5717 h. This work demonstrates that rational phosphorization induced structural modulation, providing mechanistic insights for designing noble-metal-free photo-assisted electrocatalysts for efficient alkaline water splitting.

{"title":"In-situ synthesis of zeolitic imidazolate framework-67 (ZIF-67) derived phosphorous-doped cobalt composites as bifunctional catalyst for photo-assisted water electrolysis","authors":"Chun-I Lee , Jhao-Hua Zeng , Jia-He Peng , Yi-Yu Chen , Bing-Joe Hwang , Chun-Jern Pan","doi":"10.1016/j.elecom.2026.108122","DOIUrl":"10.1016/j.elecom.2026.108122","url":null,"abstract":"<div><div>A phosphorus modified ZIF-67@TiO<sub>2</sub> photo assisted electrocatalytic heterostructure is developed to elucidate the structure performance relationship and the underlying reaction mechanism in alkaline water electrolysis. The <em>in-situ</em> growth of ZIF-67 on TiO<sub>2</sub> followed by controlled phosphorization induces partial framework reconstruction, generating Co<img>P active sites and Ti<sup>3+</sup> associated defect states while preserving the Co<img>N coordination network of the MOF. This unique structural evolution enables efficient charge separation, accelerated interfacial electron transfer, and improved utilization of photogenerated carriers.</div><div>Electrochemical and optical characterizations reveal that TiO<sub>2</sub> primarily functions as a photogenerated charge supplier, while phosphorized ZIF-67 serves as the dominant electrocatalytic component. Suppressed photoluminescence intensity and enhanced transient photocurrent responses confirm efficient inhibition of charge recombination and rapid photoinduced charge extraction across the heterointerface. As a result, the P-ZIF-67@TiO<sub>2</sub> electrode exhibits markedly reduced overpotentials and charge-transfer resistance for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under illumination.</div><div>Mechanistic analysis indicates that Co<img>P sites act as the primary HER active centers following a Volmer-Heyrovsky pathway, whereas <em>in-situ</em> surface reconstruction of Co<img>P into high valence CoOOH species governs OER activity. Consequently, the optimized P-ZIF-67@TiO<sub>2</sub> catalyst delivers a low cell voltage of 1.75 V at 10 mA cm<sup>−2</sup> under illumination and maintains stable operation at 100 mA cm<sup>−2</sup> for over 5717 h. This work demonstrates that rational phosphorization induced structural modulation, providing mechanistic insights for designing noble-metal-free photo-assisted electrocatalysts for efficient alkaline water splitting.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"185 ","pages":"Article 108122"},"PeriodicalIF":4.2,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Aluminum metaphosphate-derived CEI suppresses interfacial degradation of NCM811 at 4.5 V and 60 °C 偏磷酸铝衍生的CEI抑制了NCM811在4.5 V和60℃下的界面降解

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-01-19 DOI: 10.1016/j.elecom.2026.108114

Mingming Shi , Jianyu Yu , Wenqiang Xie , Mengjie Huang , Xing Wang , Zihao Li , Chao Shen , Gauhar Mussabek , Gulmira Yar-Mukhamedova , Keyu Xie

To enhance the energy density of lithium-ion batteries, increasing the operating voltage is crucial; however, this poses challenges to electrolyte stability, particularly with catalytic cathodes such as NCM811. We propose the incorporation of aluminum metaphosphate and fluoroethylene carbonate into the electrolyte to stabilize the NCM811 interface. This modified electrolyte formulation significantly enhances cycling stability, achieving 96.5% capacity retention after 100 cycles at 0.5C under 4.5 V, as well as improves rate capability and high-temperature endurance at 60 °C for NCM811. Analytical results indicate that Al(PO₃)₃ decomposes on the cathode surface, forming a stable cathode electrolyte interphase (CEI) composed of inorganic constituents such as AlF₃ and Al₂O₃. This CEI effectively neutralizes hydrofluoric acid (HF), physically isolates the cathode from the electrolyte, reduces transition metal dissolution, minimizes Li⁺/Ni²⁺ disorder, and preserves the structural integrity of NCM811 with a CEI thickness of approximately 3.91 nm. This study provides a viable solution to interfacial degradation in high-voltage batteries by regulating the cathode interface.

提高锂离子电池的能量密度，提高工作电压至关重要；然而，这对电解质稳定性提出了挑战，特别是对于NCM811等催化阴极。我们建议在电解质中加入偏磷酸铝和氟乙烯碳酸酯来稳定NCM811界面。这种改进的电解质配方显著提高了循环稳定性，在4.5 V下0.5C下循环100次后，NCM811的容量保持率达到96.5%，并提高了NCM811的倍率能力和60°C高温耐久性。分析结果表明，Al(PO3)3在阴极表面分解，形成由AlF3和Al2O3等无机组分组成的稳定的阴极电解质界面（CEI）。该CEI有效中和氢氟酸（HF），使阴极与电解质物理隔离，减少过渡金属溶解，最大限度地减少Li+/Ni2+无序，并保持NCM811的结构完整性，CEI厚度约为3.91 nm。本研究提供了一种通过调节阴极界面来解决高压电池界面退化的可行方案。

{"title":"Aluminum metaphosphate-derived CEI suppresses interfacial degradation of NCM811 at 4.5 V and 60 °C","authors":"Mingming Shi , Jianyu Yu , Wenqiang Xie , Mengjie Huang , Xing Wang , Zihao Li , Chao Shen , Gauhar Mussabek , Gulmira Yar-Mukhamedova , Keyu Xie","doi":"10.1016/j.elecom.2026.108114","DOIUrl":"10.1016/j.elecom.2026.108114","url":null,"abstract":"<div><div>To enhance the energy density of lithium-ion batteries, increasing the operating voltage is crucial; however, this poses challenges to electrolyte stability, particularly with catalytic cathodes such as NCM811. We propose the incorporation of aluminum metaphosphate and fluoroethylene carbonate into the electrolyte to stabilize the NCM811 interface. This modified electrolyte formulation significantly enhances cycling stability, achieving 96.5% capacity retention after 100 cycles at 0.5C under 4.5 V, as well as improves rate capability and high-temperature endurance at 60 °C for NCM811. Analytical results indicate that Al(PO<sub>3</sub>)<sub>3</sub> decomposes on the cathode surface, forming a stable cathode electrolyte interphase (CEI) composed of inorganic constituents such as AlF<sub>3</sub> and Al<sub>2</sub>O<sub>3</sub>. This CEI effectively neutralizes hydrofluoric acid (HF), physically isolates the cathode from the electrolyte, reduces transition metal dissolution, minimizes Li<sup>+</sup>/Ni<sup>2+</sup> disorder, and preserves the structural integrity of NCM811 with a CEI thickness of approximately 3.91 nm. This study provides a viable solution to interfacial degradation in high-voltage batteries by regulating the cathode interface.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"184 ","pages":"Article 108114"},"PeriodicalIF":4.2,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Electrochemical cutting of microslits on metallic glass using cylindrical submicron tips 利用圆柱形亚微米尖端电化学切割金属玻璃上的微缝

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-01-15 DOI: 10.1016/j.elecom.2026.108112

Lingchao Meng , Hao Li , Zhicheng Ai , Pengxiang Yi

Metallic glass is a promising material for fabricating micro-nanostructures, yet the minimum feature size in electrochemical cutting is typically limited by the diameter of the wire electrode. To overcome this, a novel electrochemical cutting process using cylindrical submicron tips as tool electrodes is proposed. Cylindrical tips with an average diameter of 160 nm over an apical length of 5 μm were fabricated via liquid membrane electrochemical etching. Electrochemical cutting experiments were then performed on Ni-based metallic glass using the fabricated submicron tips. By decreasing the pulse-on time to 25 ns, a microslit with an average width of 2.6 μm were achieved, which is the minimum observed under these operating conditions in this paper.

金属玻璃是制造微纳米结构的一种很有前途的材料，但在电化学切割中，最小特征尺寸通常受到线电极直径的限制。为了克服这一问题，提出了一种利用圆柱形亚微米尖端作为刀具电极的新型电化学切削工艺。采用液膜电化学刻蚀法制备了平均直径为160 nm、尖端长度为5 μm的圆柱形尖端。利用所制备的亚微米尖端对镍基金属玻璃进行了电化学切割实验。通过将脉冲导通时间降低到25 ns，获得了平均宽度为2.6 μm的微缝，这是在上述工作条件下观察到的最小微缝。

引用次数: 0

A Review on Recent Advances in Carbon-Based Catalysts for Alcohol Electro-Oxidation 醇电氧化碳基催化剂研究进展

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-01-15 DOI: 10.1016/j.elecom.2026.108113

Mohammad Bagher Askari , Parisa Salarizadeh , Sadegh Azizi , Mohsen Shojaeifar , Milad Sani , Naser Jahanbakhshi Zadeh

The escalating global demand for sustainable energy technologies has driven significant interest in direct alcohol fuel cells (DAFCs) as efficient power sources. However, their widespread commercialization is hindered by the reliance on expensive platinum-group metal (PGM) catalysts, which suffer from high cost, susceptibility to CO poisoning, and limited stability. This creates a critical knowledge gap: the urgent need for developing high-performance, cost-effective, and durable catalytic systems that can efficiently facilitate the alcohol electro-oxidation reaction (AOR). This review addresses this gap by comprehensively examining the recent advances in carbon-based materials as transformative catalyst supports and PGM-free alternatives for AOR. The fundamental premise is that carbon nanostructures such as graphene, carbon nanotubes, and heteroatom-doped carbons offer a uniquely tunable platform. Their exceptional conductivity, high surface area, and versatile functionalization capabilities make them ideal for enhancing catalytic performance. We explore how the strategic integration of noble and transition metals with these carbon supports can create synergistic effects, significantly boosting catalytic activity, improving durability, and enhancing resistance to CO intermediate poisoning. By moving beyond conventional PGM catalysts, this review provides a roadmap for designing next-generation electrocatalysts. It highlights how advanced engineering of carbon supports and hybrid nanostructures can optimize catalyst performance, paving the way for more economically viable and efficient energy conversion devices. Ultimately, this body of work not only consolidates critical recent breakthroughs but also charts a course for developing sustainable catalytic systems crucial for the future of renewable energy technology.

全球对可持续能源技术的需求不断上升，促使人们对直接酒精燃料电池（DAFCs）作为高效能源产生了极大的兴趣。然而，它们的广泛商业化受到依赖昂贵的铂族金属（PGM）催化剂的阻碍，这些催化剂成本高，易受CO中毒影响，稳定性有限。这造成了一个关键的知识缺口：迫切需要开发高性能、低成本和耐用的催化系统，以有效地促进醇电氧化反应（AOR）。这篇综述通过全面研究碳基材料作为变革性催化剂载体和不含pgm的AOR替代品的最新进展来解决这一差距。基本前提是碳纳米结构，如石墨烯、碳纳米管和杂原子掺杂碳提供了一个独特的可调平台。其优异的导电性，高表面积和多功能功能化能力使其成为提高催化性能的理想选择。我们探讨了贵金属和过渡金属与这些碳载体的战略性整合如何产生协同效应，显著提高催化活性，提高耐久性，并增强对CO中间体中毒的抵抗力。通过超越传统的PGM催化剂，本综述为设计下一代电催化剂提供了路线图。它强调了碳支撑和混合纳米结构的先进工程如何优化催化剂性能，为更经济可行和高效的能量转换设备铺平了道路。最终，这项工作不仅巩固了最近的重大突破，而且为开发对可再生能源技术的未来至关重要的可持续催化系统指明了方向。

{"title":"A Review on Recent Advances in Carbon-Based Catalysts for Alcohol Electro-Oxidation","authors":"Mohammad Bagher Askari , Parisa Salarizadeh , Sadegh Azizi , Mohsen Shojaeifar , Milad Sani , Naser Jahanbakhshi Zadeh","doi":"10.1016/j.elecom.2026.108113","DOIUrl":"10.1016/j.elecom.2026.108113","url":null,"abstract":"<div><div>The escalating global demand for sustainable energy technologies has driven significant interest in direct alcohol fuel cells (DAFCs) as efficient power sources. However, their widespread commercialization is hindered by the reliance on expensive platinum-group metal (PGM) catalysts, which suffer from high cost, susceptibility to CO poisoning, and limited stability. This creates a critical knowledge gap: the urgent need for developing high-performance, cost-effective, and durable catalytic systems that can efficiently facilitate the alcohol electro-oxidation reaction (AOR). This review addresses this gap by comprehensively examining the recent advances in carbon-based materials as transformative catalyst supports and PGM-free alternatives for AOR. The fundamental premise is that carbon nanostructures such as graphene, carbon nanotubes, and heteroatom-doped carbons offer a uniquely tunable platform. Their exceptional conductivity, high surface area, and versatile functionalization capabilities make them ideal for enhancing catalytic performance. We explore how the strategic integration of noble and transition metals with these carbon supports can create synergistic effects, significantly boosting catalytic activity, improving durability, and enhancing resistance to CO intermediate poisoning. By moving beyond conventional PGM catalysts, this review provides a roadmap for designing next-generation electrocatalysts. It highlights how advanced engineering of carbon supports and hybrid nanostructures can optimize catalyst performance, paving the way for more economically viable and efficient energy conversion devices. Ultimately, this body of work not only consolidates critical recent breakthroughs but also charts a course for developing sustainable catalytic systems crucial for the future of renewable energy technology.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"184 ","pages":"Article 108113"},"PeriodicalIF":4.2,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of voltage on accuracy in electrochemical micromachining under two-tone sinusoidal signal 双音正弦信号下电压对电化学微加工精度的影响

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-01-01 DOI: 10.1016/j.elecom.2025.108097

Xin Wang, JianChao Xiong, JiPeng Wang, Xi Chen

Electrochemical micromachining (ECMM) is a non-traditional technology in the field of machining, which has excellent machining quality. Ultra short pulse power supply is widely used in electrochemical micro machining, and shortening the pulse width is the only effective strategy to improve machining accuracy. But it is costly, not suitable for practical production, also restricts the development of other signals. To solve this problem, this paper proposes using a two-tone sinusoidal signal instead of ultra short pulses, and establishes a three-dimensional model of electrochemical machining based on finite element method. The influence of input voltage on the surface contour evolution of the anode workpiece is analyzed, and the distribution law of input voltage on the inter electrode electrolyte potential and current density is also analyzed. Theoretical analysis shows that as the amplitude of the input signal voltage in the circuit gradually decreases, the contour formed on the surface of the anode workpiece becomes shallower, and the speed of material decomposition tends to slow down. The experimental results of micro hole processing also showed that with the decrease of input voltage, the processing accuracy significantly improved, reaching the sub-micron level. In addition, when machining microstructures on high-temperature nickel chromium alloys that are difficult to cut, the same level of superior machining accuracy can be achieved.

电化学微加工（ECMM）是机械加工领域的一项非传统技术，具有优异的加工质量。超短脉冲电源广泛应用于电化学微加工中，缩短脉冲宽度是提高加工精度的唯一有效策略。但成本高，不适合实际生产，也制约了其他信号的发展。为了解决这一问题，本文提出用双音正弦信号代替超短脉冲，并基于有限元法建立了电化学加工的三维模型。分析了输入电压对阳极工件表面轮廓演变的影响，分析了输入电压对电极间电解液电位和电流密度的分布规律。理论分析表明，随着电路中输入信号电压的幅值逐渐减小，阳极工件表面形成的轮廓变浅，材料分解的速度趋于减慢。微孔加工实验结果也表明，随着输入电压的降低，加工精度显著提高，达到亚微米级。此外，在难以切削的高温镍铬合金上加工微结构时，可达到同等水平的优越加工精度。

{"title":"The effect of voltage on accuracy in electrochemical micromachining under two-tone sinusoidal signal","authors":"Xin Wang, JianChao Xiong, JiPeng Wang, Xi Chen","doi":"10.1016/j.elecom.2025.108097","DOIUrl":"10.1016/j.elecom.2025.108097","url":null,"abstract":"<div><div>Electrochemical micromachining (ECMM) is a non-traditional technology in the field of machining, which has excellent machining quality. Ultra short pulse power supply is widely used in electrochemical micro machining, and shortening the pulse width is the only effective strategy to improve machining accuracy. But it is costly, not suitable for practical production, also restricts the development of other signals. To solve this problem, this paper proposes using a two-tone sinusoidal signal instead of ultra short pulses, and establishes a three-dimensional model of electrochemical machining based on finite element method. The influence of input voltage on the surface contour evolution of the anode workpiece is analyzed, and the distribution law of input voltage on the inter electrode electrolyte potential and current density is also analyzed. Theoretical analysis shows that as the amplitude of the input signal voltage in the circuit gradually decreases, the contour formed on the surface of the anode workpiece becomes shallower, and the speed of material decomposition tends to slow down. The experimental results of micro hole processing also showed that with the decrease of input voltage, the processing accuracy significantly improved, reaching the sub-micron level. In addition, when machining microstructures on high-temperature nickel chromium alloys that are difficult to cut, the same level of superior machining accuracy can be achieved.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"182 ","pages":"Article 108097"},"PeriodicalIF":4.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145920707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Advancements in lithium-ion battery materials for thermal runaway prevention 防止热失控的锂离子电池材料研究进展

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-01-01 DOI: 10.1016/j.elecom.2025.108098

Sk. Mohammad Shareef , G. Amba Prasad Rao

Lithium-ion (Li-ion) batteries are highly preferred choice for electric vehicles due to their high energy and power densities, but their performance is highly sensitive to temperature fluctuations from charging–discharging cycles and ambient conditions, which can trigger thermal runaway (TR). Effective thermal management is crucial and involves both external cooling and internal strategies. Advances in electrode materials enhance capacity, rate capability, and operating voltage, allowing more compact, efficient packs while remaining cost-effective. Safety depends on material design, electrolyte stability, and intrinsic resistance to TR. The review details current and developmental work on novel materials for LIBs to mitigate thermal runaway. Li-ion chemistries vary in thermal stability. Commercial 18,650 LiCoO₂ cells typically trigger TR near ∼148 °C, while Ni-rich NCM cells enter TR at 160–170 °C. LiFePO₄ (LFP) pouch and prismatic cells tolerate >200 °C even at high states of charge. TR severity also differs: LFP releases ∼200–400 J g⁻¹, whereas Ni-rich NCM releases 800–1500 J g⁻¹ along with >250 mL g⁻¹ of gas. This highlights a safety–performance trade-off: LFP provides superior thermal tolerance but lower energy density, whereas Ni-rich cathodes offer higher energy at reduced abuse resistance. Electrolyte composition strongly affects TR. Flame-retardant liquid electrolytes reduce flammability but may lower ionic conductivity. Solid polymer and hybrid electrolytes improve safety by resisting ignition and suppressing dendrites, though interfacial and manufacturing challenges remain. Continued advances in materials, safer electrolytes, and battery-management systems are vital for wider EV adoption and alignment with the UN's Sustainable Development Goals and global clean-energy targets.

锂离子（Li-ion）电池因其高能量和功率密度而成为电动汽车的首选，但其性能对充放电周期和环境条件的温度波动高度敏感，可能引发热失控（TR）。有效的热管理是至关重要的，包括外部冷却和内部策略。电极材料的进步提高了容量，速率能力和工作电压，允许更紧凑，高效的包装，同时保持成本效益。安全性取决于材料设计、电解质稳定性和对TR的固有电阻。本文详细介绍了用于lib的新型材料的当前和开发工作，以减轻热失控。锂离子化学物的热稳定性各不相同。商用18650 LiCoO₂电池通常在~ 148°C附近触发TR，而富镍NCM电池在160-170°C时进入TR。LiFePO₄（LFP）袋状和柱状电池即使在高电荷状态下也能承受200°C。TR的严重程度也有所不同：LFP释放约200-400 J g - 1，而富镍NCM释放800-1500 J g - 1以及>；250 mL g - 1的气体。这突出了安全性能的权衡：LFP提供了优越的耐热性，但能量密度较低，而富镍阴极在降低抗滥用能力的情况下提供了更高的能量。电解质成分对TR有很大影响。阻燃液体电解质降低可燃性，但可能降低离子电导率。固体聚合物和混合电解质通过抗点火和抑制枝晶来提高安全性，但界面和制造方面的挑战仍然存在。材料、更安全的电解质和电池管理系统的持续进步对于更广泛地采用电动汽车以及与联合国可持续发展目标和全球清洁能源目标保持一致至关重要。

{"title":"Advancements in lithium-ion battery materials for thermal runaway prevention","authors":"Sk. Mohammad Shareef , G. Amba Prasad Rao","doi":"10.1016/j.elecom.2025.108098","DOIUrl":"10.1016/j.elecom.2025.108098","url":null,"abstract":"<div><div>Lithium-ion (Li-ion) batteries are highly preferred choice for electric vehicles due to their high energy and power densities, but their performance is highly sensitive to temperature fluctuations from charging–discharging cycles and ambient conditions, which can trigger thermal runaway (TR). Effective thermal management is crucial and involves both external cooling and internal strategies. Advances in electrode materials enhance capacity, rate capability, and operating voltage, allowing more compact, efficient packs while remaining cost-effective. Safety depends on material design, electrolyte stability, and intrinsic resistance to TR. The review details current and developmental work on novel materials for LIBs to mitigate thermal runaway. Li-ion chemistries vary in thermal stability. Commercial 18,650 LiCoO₂ cells typically trigger TR near ∼148 °C, while Ni-rich NCM cells enter TR at 160–170 °C. LiFePO₄ (LFP) pouch and prismatic cells tolerate >200 °C even at high states of charge. TR severity also differs: LFP releases ∼200–400 J g<sup>−1</sup>, whereas Ni-rich NCM releases 800–1500 J g<sup>−1</sup> along with >250 mL g<sup>−1</sup> of gas. This highlights a safety–performance trade-off: LFP provides superior thermal tolerance but lower energy density, whereas Ni-rich cathodes offer higher energy at reduced abuse resistance. Electrolyte composition strongly affects TR. Flame-retardant liquid electrolytes reduce flammability but may lower ionic conductivity. Solid polymer and hybrid electrolytes improve safety by resisting ignition and suppressing dendrites, though interfacial and manufacturing challenges remain. Continued advances in materials, safer electrolytes, and battery-management systems are vital for wider EV adoption and alignment with the UN's Sustainable Development Goals and global clean-energy targets.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"182 ","pages":"Article 108098"},"PeriodicalIF":4.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145920955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Corrigendum to “Electrodeposition of p-type Cu2O on n-type TiO2 nanosheet arrays for enhanced photoelectrochemical water splitting” [Electrochem. Commun. 178 (2025) 108009] “在n型TiO2纳米片阵列上电沉积p型Cu2O以增强光电化学水分解”的更正[电化学]。common . 178 (2025) 108009]

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-01-01 DOI: 10.1016/j.elecom.2025.108078

Lin Wang , Hai Yu , YaXin Wang , Chun Miao , QianQian Lei , XinPing Yao , XiaoChen Yao , Xin Wei , JianGuo Lv , Yan Xue , JingWen Zhang , SiWen Zhou , DanDan Qu

引用次数: 0

A periodic reactivation strategy with redox mediator towards dead Lithium-free Lithium metal batteries 无锂锂金属电池的氧化还原介质周期性再激活策略

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-01-01 DOI: 10.1016/j.elecom.2025.108099

Dan Liu , Zetao Ren , Ziyi Kang , Zhengze Dang , Qianhong Da , Yunbo Zhang , Peizhi Yang

Dead lithium limits the application of lithium metal batteries, and reactivating it via redox mediators has been proven effective. However, the insufficient reaction time of redox mediators limits their reactivation efficiency. Here, a novel periodic reactivation strategy using 1,4-di-tert-butyl-2,5-dimethoxybenzene is proposed. The reactivation process is controlled by reducing the charging/discharging rate and is initiated periodically during cycling. DDB is then oxidized to DDB⁺ at 3.95 V, shuttles to the anode, and reacts with dead lithium to re-dissolve it as Li⁺, accomplishing periodical in situ reactivation. This strategy enables an order-of-magnitude reduction in dead lithium, effective cycling capacity recovery, and excellent long-term cycling performance of LiFePO₄-Li cells.

死锂限制了锂金属电池的应用，通过氧化还原介质使其重新激活已被证明是有效的。然而，氧化还原介质的反应时间不足限制了它们的再活化效率。本文提出了一种利用1,4-二叔丁基-2,5-二甲氧基苯进行周期性再活化的新方法。再激活过程通过降低充电/放电速率来控制，并在循环过程中周期性地启动。DDB在3.95 V下氧化为DDB+，穿梭至阳极，与死锂发生反应，将其再溶解为Li+，实现周期性原位再活化。该策略使lifepo4 -Li电池的死锂减少了数量级，有效的循环容量恢复，并具有优异的长期循环性能。

引用次数: 0

Voltage optimization strategy to reduce electric field non-uniformity and improve efficiency in electrodialysis systems 降低电场不均匀性，提高电渗析系统效率的电压优化策略

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-12-29 DOI: 10.1016/j.elecom.2025.108104

Shakeel Ahmad , Jinsong Tao , Rahat Ali , Yigang He , Yong Gu , Qing Liu

Electrodialysis (ED) is a membrane-based water treatment technology that uses electricity to move ions through ion exchange membranes (IEMs) for desalination and ionic purification. Anion exchange membranes (AEMs) and cation exchange membranes (CEMs) are commonly used in this process. However, the local differences in ion concentration distributions caused by the permeability of the IEM in ED systems lead to the emergence of secondary electrical fields (SEFs). This results in an increase in the local electric field strength, which degrades the efficiency of ED. This study traces the mechanism that creates non-uniformity due to SEF and derives an equation for the distribution properties governing the SEF. Field experiments and simulations were conducted to quantitatively assess the influence of the applied voltage on the performance of the ED process. In addition, the effects of various pulsed electric field (PEF) modes on electric field distribution and overall separation efficiency were investigated. Simulation results indicate that increasing the applied voltage promotes ion accumulation at membrane interfaces and strengthens the SEF. This results in increased non-uniformity in the electric field distribution, ultimately reducing the efficiency. Furthermore, field experiments confirm that the non-uniformity induced by the SEF in the ED system can be reduced by using PEF, thus improving ED efficiency.

电渗析（ED）是一种基于膜的水处理技术，利用电力使离子通过离子交换膜（IEMs）进行脱盐和离子净化。该工艺常用阴离子交换膜（AEMs）和阳离子交换膜（CEMs）。然而，由于电畴的渗透性导致离子浓度分布的局部差异，导致二次电场的产生。这导致局部电场强度增加，从而降低了ED的效率。本研究追踪了由于SEF而产生不均匀性的机制，并推导了控制SEF分布特性的方程。通过现场实验和模拟，定量评估了外加电压对放电过程性能的影响。此外，还研究了不同脉冲电场（PEF）模式对电场分布和整体分离效率的影响。模拟结果表明，施加电压的增加促进了离子在膜界面的积累，增强了SEF。这导致电场分布的不均匀性增加，最终降低了效率。此外，现场实验还证实，使用PEF可以降低SEF在ED系统中引起的不均匀性，从而提高ED效率。

{"title":"Voltage optimization strategy to reduce electric field non-uniformity and improve efficiency in electrodialysis systems","authors":"Shakeel Ahmad , Jinsong Tao , Rahat Ali , Yigang He , Yong Gu , Qing Liu","doi":"10.1016/j.elecom.2025.108104","DOIUrl":"10.1016/j.elecom.2025.108104","url":null,"abstract":"<div><div>Electrodialysis (ED) is a membrane-based water treatment technology that uses electricity to move ions through ion exchange membranes (IEMs) for desalination and ionic purification. Anion exchange membranes (AEMs) and cation exchange membranes (CEMs) are commonly used in this process. However, the local differences in ion concentration distributions caused by the permeability of the IEM in ED systems lead to the emergence of secondary electrical fields (SEFs). This results in an increase in the local electric field strength, which degrades the efficiency of ED. This study traces the mechanism that creates non-uniformity due to SEF and derives an equation for the distribution properties governing the SEF. Field experiments and simulations were conducted to quantitatively assess the influence of the applied voltage on the performance of the ED process. In addition, the effects of various pulsed electric field (PEF) modes on electric field distribution and overall separation efficiency were investigated. Simulation results indicate that increasing the applied voltage promotes ion accumulation at membrane interfaces and strengthens the SEF. This results in increased non-uniformity in the electric field distribution, ultimately reducing the efficiency. Furthermore, field experiments confirm that the non-uniformity induced by the SEF in the ED system can be reduced by using PEF, thus improving ED efficiency.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"183 ","pages":"Article 108104"},"PeriodicalIF":4.2,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145897997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Lithium deposition-guided pore stabilization in bioprotein separators: Insights from synchrotron radiation ultra-small angle X-ray scattering evidence 锂沉积引导的生物蛋白分离器孔隙稳定：来自同步辐射超小角x射线散射证据的见解

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-12-25 DOI: 10.1016/j.elecom.2025.108103

Ning Wu , Junhao Wang , Jinxi Bao , Haiting Shi , Xianyan Wu , Feng Tian , Bo Zhu , Zhiwei Xu

Bioproteins have been demonstrated as effective modifiers for lithium anode interfaces due to their abundant functional group structures and porous architectures with high specific surface areas. However, the relationship between the evolution of pore structure and lithium ions (Li⁺) transport during battery cycling remains unclear. In this study, we propose that the abundant functional group sites on the protein surface can interact with the pores to homogenize the deposition of Li⁺, while the uniform deposition of Li⁺ is synergistically coupled with the stabilization of the porous structure through this reorganization process. To investigate the structural evolution of the separator's pore architecture during cycling, we integrated a silk fibroin (SF) network with commercial PP separators and performed ex situ characterization using synchrotron radiation ultra small angle X-ray scattering (SR-USAXS) at different cycling intervals. The results indicate that the integrity of the pore structure remains uncompromised, correlating with effective suppression of lithium dendrite growth. SR-USAXS analysis further reveals the underlying mechanism: the SF modified layer undergoes a subtle, electrochemically induced structural reorganization. This process leads to a stabilization of the nanoporous framework, which is essential for maintaining uniform ion transport. This work highlights the critical role of protein-modified porous architectures in electrolyte modification and cycling stability for lithium metal batteries, while providing insights for developing bioprotein-based electrolyte separators.

生物蛋白由于其丰富的官能团结构和具有高比表面积的多孔结构而被证明是锂阳极界面的有效改性剂。然而，电池循环过程中孔隙结构的演化与锂离子（Li+）输运之间的关系尚不清楚。在本研究中，我们提出蛋白质表面丰富的官能团位点可以与孔隙相互作用，使Li+的沉积均匀化，而Li+的均匀沉积又通过这一重组过程与多孔结构的稳定协同耦合。为了研究隔膜在循环过程中孔隙结构的演变，我们将丝素（SF）网络与商用PP隔膜整合在一起，并在不同的循环间隔使用同步辐射超小角x射线散射（SR-USAXS）进行了非原位表征。结果表明，孔隙结构的完整性没有受到损害，这与有效抑制锂枝晶生长有关。SR-USAXS分析进一步揭示了潜在的机制：SF修饰层经历了微妙的电化学诱导的结构重组。这一过程导致纳米孔框架的稳定，这对于保持均匀的离子传输是必不可少的。这项工作强调了蛋白质修饰多孔结构在锂金属电池电解质修饰和循环稳定性中的关键作用，同时为开发基于生物蛋白的电解质分离器提供了见解。

{"title":"Lithium deposition-guided pore stabilization in bioprotein separators: Insights from synchrotron radiation ultra-small angle X-ray scattering evidence","authors":"Ning Wu , Junhao Wang , Jinxi Bao , Haiting Shi , Xianyan Wu , Feng Tian , Bo Zhu , Zhiwei Xu","doi":"10.1016/j.elecom.2025.108103","DOIUrl":"10.1016/j.elecom.2025.108103","url":null,"abstract":"<div><div>Bioproteins have been demonstrated as effective modifiers for lithium anode interfaces due to their abundant functional group structures and porous architectures with high specific surface areas. However, the relationship between the evolution of pore structure and lithium ions (Li<sup>+</sup>) transport during battery cycling remains unclear. In this study, we propose that the abundant functional group sites on the protein surface can interact with the pores to homogenize the deposition of Li<sup>+</sup>, while the uniform deposition of Li<sup>+</sup> is synergistically coupled with the stabilization of the porous structure through this reorganization process. To investigate the structural evolution of the separator's pore architecture during cycling, we integrated a silk fibroin (SF) network with commercial PP separators and performed ex situ characterization using synchrotron radiation ultra small angle X-ray scattering (SR-USAXS) at different cycling intervals. The results indicate that the integrity of the pore structure remains uncompromised, correlating with effective suppression of lithium dendrite growth. SR-USAXS analysis further reveals the underlying mechanism: the SF modified layer undergoes a subtle, electrochemically induced structural reorganization. This process leads to a stabilization of the nanoporous framework, which is essential for maintaining uniform ion transport. This work highlights the critical role of protein-modified porous architectures in electrolyte modification and cycling stability for lithium metal batteries, while providing insights for developing bioprotein-based electrolyte separators.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"183 ","pages":"Article 108103"},"PeriodicalIF":4.2,"publicationDate":"2025-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145897968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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