用于超低温氢电池的三元共晶电解质中的局部水限制。

IF 16.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Ziyue Li, Yuxiao Lin, Jiafeng Ruan, Mochou Liao, Fengmei Wang, Ruohan Jiang, Xuelian Qu, Qin Li, Jinyu Yang, Xinjie Li, Zihao Zhang, Yunsong Li, Dalin Sun, Fang Fang, Fei Wang
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引用次数: 0

摘要

质子电池的离子半径小,质子传输效率高,因此有望在极端条件下实现下一代大规模能量存储。氢气具有低工作电位、快速动力学和稳定性等特点,可进一步提高质子电池的性能,但需要开发具有低凝固点和低腐蚀性的新型电解质。这项研究通过加入一种与水分子形成强键的高供体数三级成分,引入了一种局部限水策略。这种方法限制了自由水分子,降低了氢键的平均比例和强度。制备的三元共晶电解质将冰点降至-103 °C,明显低于传统的二元电解质(9.5 m H3PO4,-93 °C)。这种电解液与 Cu0.79Co0.21[Fe(CN)6]0.64-4H2O (CoCuHCF) 阴极高度兼容,可减少材料溶解和集流器腐蚀。使用这种电解质的 H2||CoCuHCF 电池显示出 23664.3 W kg-1 的高功率密度、在 -80 °C 下的卓越性能以及在 -50 °C 下 1000 次循环(大于 30 天)的稳定循环性。这些发现为质子电解质提供了一个框架,凸显了氢电池在挑战性环境中的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Localized Water Restriction in Ternary Eutectic Electrolytes for Ultra-Low Temperature Hydrogen Batteries.

Proton batteries are promising candidates for next-generation large-scale energy storage in extreme conditions due to the small ionic radius and efficient transport of protons. Hydrogen gas, with its low working potentials, fast kinetics, and stability, further enhances the performance of proton batteries but necessitates the development of novel electrolytes with low freezing points and reduced corrosion. This work introduces a localized water restriction strategy by incorporating a tertiary component with a high donor number, which forms strong bonds with water molecules. This approach restricts free water molecules and reduces the average hydrogen bond ratio and strength. As-prepared ternary eutectic electrolytes lowered the freezing point to -103 °C, significantly lower than the traditional binary electrolyte (9.5 m H3PO4, -93 °C). This electrolyte is highly compatible with the Cu0.79Co0.21[Fe(CN)6]0.64 ⋅ 4H2O (CoCuHCF) cathode, reducing material dissolution and current collector corrosion. The H2||CoCuHCF battery using this electrolyte demonstrated a high-power density of 23664.3 W kg-1, excellent performance at -80 °C, and stable cyclability over 1000 cycles (>30 days) at -50 °C. These findings provide a framework for proton electrolytes, highlighting the potential of hydrogen batteries in challenging environments.

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来源期刊
CiteScore
26.60
自引率
6.60%
发文量
3549
审稿时长
1.5 months
期刊介绍: Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.
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