有碳酸盐-硫酸盐混合结构的添加剂使高电压和长寿命的离子电池成为可能
Ludan Zhang1, Jingle Du2, Fangzheng Liu2,3
1Shenzhen CAPCHEM Technology Co., Ltd., Shenzhen, 518118, China.
Small (Weinheim an der Bergstrasse, Germany)
|August 16, 2025
概括
一种新的碳酸盐-硫酸盐混合电解质添加剂可以提高高压离子电池的性能. 它稳定电极,使1000多个循环能够保持90%的容量并提高安全性.
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:
- ,,,氧化 (NCM) 阴极的高压运行增加了能量密度,但导致了材料降解.
- 电解质分解,气体生成和结构损坏限制NCM阴极性能和安全.
研究的目的:
- 为高压NCM阴极设计一种新的电解质添加剂.
- 为了提高离子电池的稳定性和能量密度.
- 为了提高电池在恶劣条件下的安全性.
主要方法:
- 一个碳酸盐-硫酸盐混合电解质分子的合成.
- 使用添加剂对石墨水电池的电化学测试.
- 分析电极相间形成和稳定性的分析.
- 在高温下进行热稳定性和老化试验.
主要成果:
- 混合添加剂在阳极上形成一个强大的固体电解质介相 (SEI).
- 在4.4V的1000个循环中,石墨的LiNi0.6Co0.1Mn0.3O2电池实现了90%的容量保留.
- 电池显示出出色的热稳定性,耐老化 (在60°C保持90%),并推迟了热失控.
- 该添加剂在LiCoO2和LiMn0.6Fe0.4PO4系统中具有广泛的适用性.
结论:
- 碳酸盐 - 硫酸盐混合添加剂有效抑制电解质分解,并保持电极完整性.
- 这种方法显著提高了高压离子电池的循环寿命,能量密度和安全性.
- 该添加剂对下一代高性能和安全的储能解决方案显示出希望.
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