对于全固态电池,诱导超离子导电性 Li6+ xP1- xGe xS5I
Marvin A Kraft1, Saneyuki Ohno1,2, Tatiana Zinkevich3,4
1Institute of Physical Chemistry , Justus-Liebig-University Giessen , Heinrich-Buff-Ring 17 , D-35392 Giessen , Germany.
Journal of the American Chemical Society
|November 2, 2018
概括
研究人员为更安全的电池增强了固体电解质. 在聚中替换显著提高了离子导电性,使稳定的厚电极固态电池具有最小的容量.
科学领域:
- 材料科学
- 电化学
- 固态化学
背景情况:
- 固态电池提供了比传统离子电池更安全的替代品.
- 固体电解质的较高离子导电性对于电池的高性能至关重要,尤其是在厚电极中.
- 氧化是固体电解质的有前途的材料.
研究的目的:
- 在Li$_{6+x}$P$_{1-x}$Ge$_{x}$S$_{5}$I中研究替代的效应.
- 为改善固态电池应用优化离子导电性.
- 了解结构变化和离子传输机制之间的关系.
主要方法:
- 在Li$_{6+x}$P$_{1-x}$Ge$_{x}$S$_{5}$I结构中进行系统的替代.
- 使用X射线衍射和中子衍射进行表征.
- 通过阻抗光谱和核磁共振 (NMR) 评估电化学性能.
主要成果:
- 增加的含量会导致位乱.
- 这种疾病显著降低了离子运动的激活屏障.
- 实现了5.4 ± 0.8毫秒的离子导电率 (冷压) 和18.4 ± 2.7毫秒的离子导电率 (烧结),为 argyrodites报告的最快.
- 在厚电极固态电池中成功应用,容量可忽略不计,超过150个周期.
结论:
- 替代是一种有效的策略来增强二氧化的离子导电性.
- 现场乱和激活能量减少之间的相关性为设计优质固体电解质提供了途径.
- 这些发现为高性能,安全的固态电池铺平了道路.
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