通过电解质添加剂工程构建高+导电电极电解质介面,用于4.6V电池和LiCoO2电池
Girum Girma Bizuneh1, Chunlei Zhu1, Junda Huang1
1School of Physics and Electronics, Hunan University, Changsha, 410082, P. R. China.
Small methods
|May 31, 2023
概括
研究人员使用4 - 尼特罗乙烯化物增强了高压 - 氧化物 (LiCoO2) 电池. 这种添加剂稳定接口,使4.6V的稳定运行成为可能,从而提高了能量密度.
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:
- 高压运行是提高电池的能量密度的关键.
- 电极 - 电解质界面的不稳定性,包括Li树突的生长和LiCoO2的结构降解,限制了碳酸盐电解质的高压性能.
研究的目的:
- 制定一项战略,用于构建高压电池的稳定界面.
- 为了提高4.6V运行的Li,dSi,LiCoO2电池的稳定性和能量密度.
主要方法:
- 使用4 - - 尼托甲化物作为电解质添加剂.
- 在阳极上形成了含有LiNxOy的阴极电解质介面 (CEI) 和富含LiF的固体电解质介面 (SEI).
主要成果:
- 在4.6V的电压下,实现了Lithium-ionLiCoO2电池的稳定运行.
- 显示了216.9 mAh g-1.的高初始特异性容量.
- 在0.3°C的200个循环后保持了167.1mAhg-1的容量保留.
结论:
- 电解质添加剂的策略有效地提高了高压电池的稳定性.
- 形成含有LiNxOy的保护CEI和富含LiF的SEI对于稳定的高压性能至关重要.
- 这项工作提出了一种可行的方法,用于实际应用高压LiH电池LiCoO2电池.
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