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用桥为实用海水电池的紧型接口屏蔽

Wenjie Fan¹, Huicai Wang¹, Xingjie Wang¹

¹School of Materials Science and Engineering, Ocean University of China, Qingdao, 266404, China.

Angewandte Chemie (International ed. in English)

|September 13, 2025

概括

在离子电池中使用天然海水可以降低成本,但会导致腐蚀. 一种新的宿主-客户添加剂创建了一个保护屏蔽,将阳极寿命延长到400小时,并提高电池性能.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
储能储能储能储能储能储能

背景情况:

水性离子电池提供了一个具有成本效益的储能解决方案.
作为电解质的天然海水降低了制造成本,但由于离子和水,引入了严重的阳极腐蚀.
开发用于天然海水电解质中的阳极的保护策略对于实际应用至关重要.

研究的目的:

用天然海水为离子电池设计一种新的电解质系统.
为了减轻天然海水电解质中阳极的腐蚀.
为了提高阳极和全电池的循环稳定性和性能.

主要方法:

一种天然海水电解质与宿主-客体复杂添加剂 (2-mercaptobenzothiazole客体和循环德克斯主体) 的配方.
对添加剂在电解质中的持续释放行为进行调查.
分析添加剂在阳极接口上的保护机制,使用离子的桥梁效应.
电化学测试Zn的对称细胞和Zn的V3O8·1.5H2O全细胞.
一个Ah级袋式电池的性能评估.

主要成果:

宿主-客人添加剂在阳极上形成一个紧的屏蔽,形成一个化物/缺水的微环境.
阳极在42.7%放电深度的对称电池中实现了400小时的延长循环寿命.
完整细胞的Zn下载器NaV3O8·1.5H2O在0.5A g-1.1的600个循环后显示出99%的容量保留.
一个Ah级袋式电池维持了50个周期的稳定循环,初始放电容量为1.21Ah.

结论:

设计的天然海水电解质与宿主-客人添加剂有效抑制阳极腐蚀.
这种方法显著提高了水性离子电池的循环寿命和稳定性.
这些发现为低成本,高性能离子电池,利用天然海水电解质铺平了道路.

关键词:

腐蚀是一种腐蚀.海水的电解质是海水的电解质.超分子化学超分子化学持续释放的释放是一种持续释放.金属阳极是一种金属阳极.

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