添加纳西康电解质与石墨涂层,用于稳定的全固态金属电池
Jing Jia1,2, Tinghu Liu2, Yunming Li2
1Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Laboratory of Zhongyuan Light, Zhengzhou University, Zhengzhou, Henan, 450001, P. R. China.
ChemSusChem
|April 4, 2024
概括
这项研究通过将Ca2+添加到固体电解质中,并添加石墨接口来增强全固态电池. 这提高了离子导电性和电池性能,克服了更安全的电池的关键挑战.
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:
- 全固态金属电池对储能充满希望,但面临着固体电解质低离子导电性和与阳极差的接口接触的挑战.
- 这些局限性阻碍了有效的离子传输,并可能导致树岩的形成,损害电池的安全性和性能.
研究的目的:
- 为了提高Na3Zr2Si2PO12固体电解质的离子导电性和接口特性,用于全固态金属电池.
- 为了改善固体电解质和金属阳极之间的固体-固体接触,以实现均的/脱落,并抑制树的生长.
主要方法:
- 合Na3Zr2Si2PO12固体电解质与Ca2+以提高离子导电性.
- 在Ca2+合电解质 (Na3.4Zr1.8Ca0.2Si2PO12-G) 上涂上基于石墨的接口层,以增强与阳极的接口接触.
- 使用Na3V2(PO4)3作为阴极组装一个完整的电池并评估电化学性能.
主要成果:
- 用Ca2+合的Na3Zr2Si2PO12在室温下达到2.09×10-3 S cm-1的高离子导电率.
- 石墨接口层显著提高了临界电流密度,达到3.5mA cm-2,是未使用过的电解质的三倍.
- 组装的Na3V2(PO4)3/Na3.4Zr1.8Ca0.2Si2PO12-G/Na电池在1C时显示了81.47mAhg-1的可逆容量,并在500个循环后保持了97.75%的容量.
结论:
- 2+兴奋剂和石墨接口工程是克服全固态金属电池局限性的有效策略.
- 开发的固体电解质和接口使金属阳极能够稳定高效地运行,为更安全,高性能电池铺平了道路.
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