富含碳烯的多功能化合物用于在高压金属电池中构建"耐腐蚀电极和电解质接口"
Qiang Wang1, Qian Wang2, Xinming Fan3
1College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China; Institute of Resource Recycling, Changsha 410083, China.
Journal of colloid and interface science
|November 10, 2024
概括
甲 (GA) 通过稳定阴极-电解质接口来提高离子电池的性能. 这种添加剂提高了高压金属电池的循环稳定性和容量保留.
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:
- 离子电池的进步主要集中在分层的氧化物阴极上.
- 增强阴极-电解质接口对于稳定性至关重要,但仍未得到充分研究.
- 电解质添加剂为界面修改提供了具有成本效益的解决方案.
研究的目的:
- 研究谷氨酸无水化物 (GA) 作为高压金属电池的电解质添加剂.
- 为了提高NaNi1 / 3Fe1 / 3Mn1 / 3O2 / Na (NFM / Na) 阴极的循环稳定性.
- 阐明GA在提高电池性能方面的机械作用.
主要方法:
- 用GA和没有GA的NFM/Na电池的电化学测试.
- 在高电压 (4.0V和4.1V) 中分析循环稳定性和容量保留.
- 理论计算以了解GA的作用机制.
主要成果:
- 带GA电解质的电池在200个周期以4.0V的电压后显示出80.51%的容量保留.
- 带GA电解质的电池在150个周期以4.1V的电压后显示了76.01%的容量保留.
- GA修改了溶解,并促进了具有OCO组的稳定,弹性阴极电解质接口 (CEI) 薄膜.
结论:
- 葡萄糖化物有效地提高了高压金属电池的循环稳定性.
- 来自GA的CEI膜保护了阴极的晶体结构,并抑制了过渡金属的溶解.
- GA是改善离子电池寿命和性能的一种有前途的添加剂.
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