在湿度辅助的Li-O中对化LiOH的脱进/进化过程的操作观测
Hyunjin Kim1, Hyunpyo Lee1, Wonsung Choi1
1Battery Material TU, Samsung Advanced Institute of Technology, Samsung Electronics, Suwon, Gyeonggi-do 16678, Republic of Korea.
ACS applied materials & interfaces
|June 9, 2023
概括
研究人员通过利用加湿氧来增强全固态氧 (Li-O2) 电池. 这种方法通过促进排放产品的水化,从而提高了排放能力和电压,从而导致了高能量密度.
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:
- 带有陶电解质的全固态Li-O2电池为有机电解质提供了替代品,但由于Li2O2的电子导电性差,其放电容量低,超电位高.
- 目前固态Li-O2电池技术的局限性阻碍了它们在高能量密度应用中的潜力.
研究的目的:
- 实时调查全固态Li-O2电池中的放电/充电过程.
- 为了澄清排放产品的水化机制及其对细胞性能的影响.
- 制定提高固态-O2电池能量密度的策略.
主要方法:
- 使用阳极,Li1.3Al0.3Ti1.7(PO4) (LATP) 固体电解质和Pt网格模式空气电极构建全固态平面型Li-O2电池.
- 在加湿的O2环境中实时观察排放/放电过程.
- 排放产品水化及其对离子运输和电化学性能的影响的分析.
主要成果:
- 该研究表明,排放产品 (LiOH) 在加湿的O2中受水,从而促进离子运输.
- 化增加了放电容量和电压 (从2.96到3.4V与Li/Li+相比).
- -O2电池实现了高能量密度,其电极容量为3600 mAh/g,使用平面Pt图案电极在加湿的O2.中实现了高能量密度.
结论:
- 这是首次在化O2条件下的Li-O2电池中证明排放产品的水化.
- 了解水化现象为开发高能量密度全固态-O2电池提供了新的策略.
- 一个简单,易于制造的平面Pt图案阴极在加湿的O2中是先进的Li-O2电池开发的有前途的方法.
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