晶体电解质提高了全固态离子电池的高性能
Junfeng Luo1, Yi Chang2, Jing-Wen Shi1
1School of Chemistry, National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs, Engineering Research Center of MTEES (Ministry of Education), and Key Lab of ETESPG (GHEI), South China Normal University, Guangzhou 510006, P. R. China.
我们开发了聚尼特 (Li-SN45),以改善固态离子电池 (SSB) 中的离子运输. 这种新型材料提高了电池性能和循环稳定性.
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
- 固态化学 固态化学
背景情况:
- 完全固态离子电池 (ASSB) 中的刚性固体-固体接口阻碍了离子运输.
- 开发有效的接口修改器对于提高ASSB性能至关重要.
研究的目的:
- 引入聚尼特 (Li-SN45) 作为ASSB的双边接口修饰剂.
- 调查Li-SN45对离子导电性,接口稳定性和电池整体性能的影响.
主要方法:
- -SN45.5的合成和表征.
- 使用Li-SN45作为接口修饰器的ASSB的制造和电化学测试.
- 对离子导电性和耐腐蚀性进行分析.
- 使用MALDI-TOF进行结构分析和结晶结构的确定.
主要成果:
- -SN45具有高离子导电性 (3.38 mS cm-1) 和对金属阳极的优异耐腐蚀性.
- 用Li-SN45组装的ASSB显示出高放电容量 (170 mAh g-1 @ 20 mA g-1) 和出色的循环稳定性 (在100个循环后保持97%).
- -SN45的晶体结构促进了高效的"无离子"+跳跃通路.
结论:
- -SN45是一种高效的ASSB接口修饰器,可以显著改善离子传输.
- 这些发现提供了关于固体电解质中运输机制的见解.
- 这项工作为设计下一代具有增强性能的ASSB铺平了道路.
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