SiSe2用于高级硫化物固体电解质和离子电池
Ki-Hun Nam1,2, Vinoth Ganesan3, Do-Hyeon Kim2,3
1Energy Storage & Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
二化物 (SiSe2) 在储能方面表现有前途. 这种分层材料增强了所有固态电池的固体电解质,并在离子电池中充当阳极,显示出高性能和稳定性.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 层状化 (SiSe2) 由于其结构具有独特的特性,但仍未被用于能源应用.
- 现有的储能技术需要先进的材料来提高性能和安全性.
研究的目的:
- 用一个简单的固态路径合成分层SiSe2.
- 研究SiSe2作为完全固态电池 (ASSB) 中硫化物固体电解质的添加剂的潜力.
- 评估SiSe2作为离子电池 (LIB) 的阳极材料.
主要方法:
- 层层的SiSe2.2的固态合成.
- 制造和电化学评估SiSe2替代的Li-argyrodites作为ASSBs的固体电解质.
- 测试SiSe2作为LIBs中的阳极材料,并进行现场分析.
主要成果:
- SiSe2 替代的 Li-argyrodites 显示出高的离子导电性,低的激活能,以及出色的空气稳定性.
- 使用SiSe2修饰电解质的ASSB全细胞实现了高容量 (202/169 mAh g-1) 和稳定的循环.
- SiSe2纳米复合材料阳极表现出高容量 (950/775 mAh-1),高初始库伦比效率 (81.6%),以及强大的循环稳定性.
结论:
- 层状SiSe2是一种用于储能应用的多功能材料.
- SiSe2显示出作为ASSB的固体电解质添加剂和LIB的阳极材料的巨大潜力.
- 易于合成和有前途的电化学性能突显了SiSe2对未来能源设备的可行性.
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