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对超高能量密度水性离子电池进行维度工程驱动的V/O缺陷调制

Zhihao Deng¹, Wu Shao¹, Jie Sheng¹

¹Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|October 6, 2025

概括

研究人员开发了一种新的缺陷丰富的瓦纳酸盐阴极,用于水性离子电池 (AZIB). 这种材料显著提高了能量密度和循环稳定性,为下一代能源存储提供了有希望的进步.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

水性离子电池 (AZIB) 在实现高能量密度,优化 Zn2+ 动力学和氧化还原活性方面面临挑战.
开发高效的阴极材料对于推进AZIB技术至关重要.

研究的目的:

为AZIBs设计一种具有增强性能的新型阴极材料.
调查现场结构和缺陷工程在改善电池特性中的作用.

主要方法:

利用谷氨酸作为结构调节剂在氨基瓦纳酸的热水合成.
诱导了维度转换,并在氨瓦纳酸盐结构中产生了高密度的V / O缺陷.
描述了该材料作为AZIB中的阴极的电化学性能.

主要成果:

富含缺陷的瓦纳酸 (V/O-NHVO) 阴极表现出高的特异容量 (567.9 mAh g-1 在0.1 A g-1 时) 和能量密度 (433 Wh kg-1).
该材料表现出极好的循环稳定性,在2000个循环中保持了87.9%的容量,峰值功率密度为3575W kg-1 .
这种工程材料在水性离子电池中也显示出有前途的性能.

结论:

使用谷氨酸的现场结构和缺陷工程是开发高性能AZIB阴极材料的有效策略.
V/O-NHVO材料为水性多价值离子电池提供了一个引人注目的设计范式.
工程缺陷和间层水显著提高了氧化还原动力学和反应可逆性.

关键词:

在 V/O 缺陷调制中.水性离子电池水性离子电池维度工程是指维度工程的工程.超高能量密度的超高能量密度

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