在现场建造的螺旋层稳定上循环LiCoO2用于高性能离子电池
Sisheng Sun1, Ersha Fan1,2, Hongyi Wang1
1Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Small (Weinheim an der Bergstrasse, Germany)
|May 5, 2024
概括
这项研究提出了一种环保方法,用于再生离子电池中降解的氧化 (LiCoO2) 阴极. 上循环材料显示出增强的稳定性和性能,提供了一个有前途的回收策略.
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
- 可持续化学 可持续化学
背景情况:
- 对离子电池的需求不断增加,需要有效回收阴极材料.
- 退化的LiCoO2阴极限制了电池的性能,并产生浪费.
- 开发可持续的回收利用策略对于电池市场至关重要.
研究的目的:
- 为故障的LiCoO2阴极制定一个简单和环保的上循环再生战略.
- 为了提高回收的LiCoO2在高电压 (4.6V) 的电化学稳定性和性能.
- 调查现场螺旋涂层形成的潜力,以改善阴极回收利用.
主要方法:
- 固相烧结方法,用于同时重新化和表面重建.
- 对补充剂和谷物再结晶的系统研究.
- 上循环和原始阴极材料的电化学性能测试.
主要成果:
- 上循环的LiCoO2在4.6V时表现出增强的稳定性,这是由于LiCoxMn2-xO4旋表面涂层.
- 1%的表面涂层上循环样本实现了高排放能力 (207.9mAhg-1在0.1C) 和出色的循环性 (77.0%的保留300个循环后).
- 上循环材料的性能超过了原始阴极材料的性能.
结论:
- 拟议的易于固相烧结方法有效地恢复了降解的LiCoO2阴极.
- 在现场的旋涂层提供了卓越的电化学性能和稳定性.
- 这种上循环策略为回收使用的LiCoO2阴极提供了一种可行和有前途的方法.
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