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Jie Feng¹, Xinyang Li¹, Yuxin Ouyang¹

¹School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education, and National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, Xi'an Jiaotong University, No.28, West Xianning Road, Xi'an, 710049, P. R. China.

Angewandte Chemie (International ed. in English)

|May 31, 2024

概括

使用PAPE@Zn层的新策略通过优化离子扩散来改善水性离子电池,防止树的生长和副作用. 这提高了电池的稳定性和性能,用于实际应用.

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 (ZIB) 面临着诸如寄生性副作用和阳极上的树生长等挑战,限制了它们的寿命.
控制Zn2+的迁移和扩散对于改善ZIB性能和稳定性至关重要.

研究的目的:

开发一种自发级联优化策略,以调节 Zn2+ 在阳极的迁移-扩散行为.
为了提高水性离子电池的稳定性和循环寿命.

主要方法:

在阳极上在现场构建PAPE@Zn层,具有分离-重建特性.
使用易溶性聚乙烯氧化物 (PEO) 通过削弱H2O-Zn2+协调来进行初始优化.
采用难溶性聚合4-烯基亚 (PACMO) 来形成疏水性,性阵列,用于二次优化 Zn2+ 的脱溶和扩散.

主要成果:

级联优化有效调节了Zn2+的迁移-扩散,显著抑制了树的生长和副作用.
对称的细胞表现出了显著的稳定性,超过4000小时在1 mA cm−2.2.
PAPE@Zn//NH4+-V2O5全电池在15 A g−1的12000个周期中实现了72.2%的容量保留,并且在低N/P比率 (0.6) 和高质量负载 (~17 mg cm−2) 中表现出色.

结论:

自发级联优化策略为实现高性能和实用的水性离子电池提供了一条新的途径.
开发的PAPE@Zn层有效地解决了阳极的关键局限性,为先进的储能解决方案铺平了道路.

关键词:

界面的修改界面的修改低的N/P比率低的N/P比率聚合物阵列是一种聚合物阵列.自发级联优化自发级联优化阳极是一种阳极.

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