离子工程用于稳定化物固体电解质中的间位,用于全固态电池.
Kern-Ho Park1, Se Young Kim2,3, Mina Jung1
1Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam 13509, South Korea.
ACS applied materials & interfaces
|December 11, 2023
概括
硬基替代,如Li2ZrCl6中的氧,显著提高了化物固体电解质的离子导电性. 这种方法稳定了离子迁移路径,提高了电池的性能.
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
- 固态化学 固态化学
背景情况:
- 化物固体电解质 (SE) 以其高压稳定性而闻名,这对于先进的电池技术至关重要.
- 在化物SE的离子导电性方面,先前的改进涉及到有价金属的替代或采用特定的晶体结构 (例如,单临C2/m与ccp离子排列).
研究的目的:
- 引入和研究一种新的"硬基替代"方法,以提高化物 SEs.中的离子导电性.
- 阐明负责导电性改进的潜在机制.
- 评估氧化SEs在实用的全固态电池应用中的潜力.
主要方法:
- 合成和特征Li2ZrCl6用氧气,硫和进行替代.
- 测量合成材料的离子导电性.
- 进行了系统的比较研究,以了解离子子格子结构和间位点稳定作用.
主要成果:
- 在Li2ZrCl6 (三角形,hcp) 中的氧气替代形成Li3.1ZrCl4.9O1.1 (单临床,ccp) 的离子导电率从0.33到1.3mS cm−1.1.增加了.
- 硫和的替代并没有显著改善离子导电性.
- 离子迁移间位点的能量稳定被确定为增强导电性的关键因素,而不仅仅是ccp类离子子子网.
结论:
- 硬基替代,特别是氧气结合,是提高化物中离子导电性的有效策略.
- 在实现高离子导电性方面,迁移路径的稳定性比单独的离子排列更为关键.
- 氧化SE显示未来全固态电池开发的希望.
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