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一种符合规范的保护皮肤,产生稳定的阴极-电解质接口,用于长寿命离子电池

Yan Huang¹, Xinyuan Zhang², Nan Chen²

¹Key Laboratory of Automobile Materials (Ministry of Education), College of Materials Science and Engineering, Jilin University, Changchun, 130012, China.

Small (Weinheim an der Bergstrasse, Germany)

|June 1, 2023

概括

用无形FePO4涂层保护离子电池 (PIB) 提高了阴极的稳定性. 这一突破将K0.5Ni0.1Mn0.9O2阴极的周期寿命延长到2500个周期,用于电网规模的能量存储.

科学领域:

材料科学与工程材料科学与工程
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:

离子电池 (PIB) 对于电网规模的能源存储至关重要.
基于K的分层氧化物阴极由于接口不稳定性而面临有限的使用寿命.
了解和缓解这些接口问题是推动GDP技术发展的关键.

研究的目的:

为基于K的分层氧化物阴极开发一个稳定的接口.
提高离子电池的循环寿命和整体性能.
为了研究使用保护性涂层的界面稳定机制.

主要方法:

用无形FePO4 (a-FP) 涂层K0.5Ni0.1Mn0.9O2 (KNMO) 阴极.
研究无形FePO4涂层对应变放松和K离子传输的特性.
分析在阴极表面形成强大的介相的过程.
评估涂层阴极的电化学性能和循环寿命.

主要成果:

无形FePO4涂层提供了弹性和K离子导电保护层.
涂层有效地抑制了机械裂纹和过渡金属溶解.
该KNMO@a-FP阴极表现出卓越的K-运输能力.
对于KNMO@a-FP阴极,实现了2500个周期的突破周期寿命.

结论:

无形FePO4涂层是稳定基于K的分层氧化物阴极的可行策略.
开发的表面保护层显著提高了离子电池的耐用性.
这项工作为设计稳定的基于K的分层阴极用于储能应用提供了洞察力.

关键词:

这种电池是K-离子电池.阴极-电解质接口接口符合表面保护的表面保护骑自行车的稳定性骑自行车的稳定性层层的阴极材料是多层的.

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