高导电性阿吉罗代特电解质,具有单电解质全固态电池的自我被动稳定性
Xin Wu1, Lixin Liang2, Bingxuan Du1
1Center of Energy Storage Materials & Technology, Department of Energy Science and Engineering, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, P.R. China.
这项研究为所有固态电池引入了一种新的固态电解质,以提高安全性和性能,提高离子导电性和稳定性,用于下一代储能.
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:
- 全固态电池 (ASSLB) 提供了更高的安全性和能量密度.
- 阿尔吉罗迪特型固态电解质 (SSEs) 具有成本效益,但在离子导电性和稳定性方面存在局限性.
研究的目的:
- 设计一种具有双化物占用和Ta5+替代的新型SSE.
- 改进ASSLB中的离子导电性和接口兼容性.
主要方法:
- 合成了一个新的SSE:Li5.5P0.94Ta0.06S4.5Cl0.75Br0.75.
- 研究了它的离子导电性和电化学稳定性.
- 制造并经过测试的ASSLB设备.
主要成果:
- 在室温下达到高离子导电性 (12 mS cm-1).
- 在现场展示了自我被动化的接口层,以确保对金属阳极和高压阴极的稳定性.
- 展示了出色的循环性能:在200个循环 (0.2C) 上保持100%,在1200个循环 (0.5C) 上保持81%.
结论:
- 新的SSE为高性能,可扩展的ASSLB提供了一条可行的路线.
- 单消极电解质增强了电池的安全性和寿命.
- 这项研究推动了下一代储能解决方案的开发.
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