在电解质中建造订购和快速的离子通道,用于Li-SPAN电池
Chenran Hao1, Huichao Lu1, Jiqiong Liu1
1Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
ACS applied materials & interfaces
|October 28, 2024
概括
一种新的凝电解质通过稳定接口和改善离子传输来提高硫 (Li-SPAN) 电池的性能. 这一突破解决了兼容性问题,为高能量密度应用铺平了道路.
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:
- 硫 (Li-S) 电池对于高能量密度应用具有前景.
- -S电池系统面临的挑战是阳极和碳酸盐电解质兼容性.
- 在硫化多烯 (Li-SPAN) 电池中,由于它们的固体-固体转换,所以没有穿效应.
研究的目的:
- 为Li-SPAN电池开发一种稳定的有机-无机凝碳酸盐电解质.
- 为了提高阳极和碳酸盐电解质之间的兼容性.
- 为了提高Li-SPAN电池的整体性能和周期寿命.
主要方法:
- 一种有机-无机的凝碳酸盐电解质被合成使用聚胺 (PI) 进行凝.
- 硫化 (ZnS) 纳米点被加载在二硫化 (MoS2) 片上,以增强离子扩散.
- 使用Li对称电池,LiCu电池和Li-SPAN电池配置来评估电解质的性能.
主要成果:
- 凝电解质有效地稳定了阳极和阴极的界面和结构.
- 对称电池实现了900多小时的稳定循环,5 mAh cm-1.1.
- LiCu细胞的寿命达800小时,库伦比克效率 (CE) 为98.3%.
- -SPAN电池表现出超过850个循环,容量保持率为85.1%.
结论:
- 拟议的凝电解质克服了Li-SPAN电池中的阳极/碳酸盐电解质不兼容性.
- 复合ZnS/MoS2结构促进了均的沉积,并改善了离子运动.
- 这项工作为开发利用碳酸盐基电解质的高能Li-SPAN电池提供了一种可行的方法.
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