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通过功能性纳米钻石修饰分离器调节离子行为,用于高速耐用水性离子电池

Qiuxia Zhang¹, Linfeng Wan¹, Xuan Gao^2,3

¹State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, PR China.

ACS applied materials & interfaces

|December 9, 2024

概括

纳米钻石修改了玻璃纤维分离器,以防止水性离子电池中的树突. 这一创新为先进的电池技术提供了稳定的循环和高性能.

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 (AZIBs) 是有前途的,但受到树生长和电极-电解质接口 (EEI) 的副作用反应的限制.
商用玻璃纤维 (GF) 分离器具有大而不均的孔隙,导致离子传输不均,并加剧了这些问题.

研究的目的:

为无树和高性能AZIB开发先进的分离器.
利用纳米钻石 (NDs) 调节分离器孔结构并控制 Zn2+ 运输.

主要方法:

使用纳米钻石 (NDs) 修改玻璃纤维分离器.
用NDs修改的GF分离器的孔隙结构和离子传输性能的表征.
用修改的分离器测试Zn的对称细胞和Zn的完整细胞.

主要成果:

经NDs修改的GF分离器由于ND表面功能组而表现出受控的Zn²⁺传输.
对称的Zn细胞在5 mA cm-2和240小时在10 mA cm-2下表现出近1800小时的稳定循环.
完整的细胞在1000个循环后在1Ag-1时显示出高容量保留.

结论:

纳米钻石修饰有效地抑制了AZIBs中的树形成.
开发的NDs-GF分离器显著提高了AZIB的循环稳定性和性能.
本研究为水性离子电池技术中先进的分离器设计提出了一个可行的策略.

关键词:

水性离子电池的水性离子电池电极 - 电解质接口接口一个纳米钻石.分离器的修改分离器的修改 Zn2+ 的运输特性.

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