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通过β-环极烯聚合物构建准单离子导体以稳定 Zn 阳极

Guoqun Zhang¹, Lulu Fu², Yuan Chen^1,3

¹School of Integrated Circuits Wuhan National Laboratory for Optoelectronics (WNLO) Key Laboratory of Material Chemistry for Energy Conversion and Storage, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China.

Angewandte Chemie (International ed. in English)

|August 29, 2024

概括

一种新型的环氧烯聚合物涂层稳定了水性离子电池中的阳极. 这种准单离子导体增强了离子传输,并显著改善了电池周期寿命和大规模能源存储的性能.

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 (AZIB) 是大规模储能的一个有前途的技术.
阳极的挑战,包括腐蚀和副作用,限制了AZIB的性能和寿命.
稳定阳极对于开发实用且耐用的AZIB至关重要.

研究的目的:

为AZIBs中的阳极开发一种保护性涂层.
创建一个准单离子导体,以改善离子运输和阳极稳定性.
为了提高AZIB的整体性能和周期寿命.

主要方法:

涂覆阳极与一个环氧烯聚合物 (P-CD).
研究P-CD层内的宿主-客人相互作用和键.
评估P-CD涂层Zn//Zn对称细胞和Zn//K1.1V3O8 (KVO) 全细胞的性能.

主要成果:

这种P-CD涂层有效地抑制了Zn阳极腐蚀和副作用.
P-CD 层形成了一个准单离子导体,使 Zn 离子转移数从 0.31 增加到 0.68.
涂有P-CD涂层的Zn//Zn细胞在高电流密度下,周期寿命提高了70.6倍.
P-CD涂层的Zn//KVO全细胞在10Ag-1下1000个周期后保持了94.5%的容量,超过未涂层的细胞.

结论:

环氧德克斯聚合物涂层为AZIBs中阳极稳定提供了一种实用策略.
准单离子导体有效地抑制不良的接口现象,提高电池的寿命.
这种方法为改善水性离子电池性能提供了一个新的视角.

关键词:

阳离子捕捉技术可以捕捉阳离子.水性Zn离子电池的使用方法循环德克斯特林聚合物的聚合物.几乎单个的离子导体.

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