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对Li_6.6Si_0.6Sb_0.4S₅I电解质进行选择性氧气兴奋,以提高空气稳定性和电化学性能

Qiyue Luo¹, Siwu Li², Lin Li¹

¹State Key Laboratory of Advanced Electromagnetic Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China.

|September 18, 2025

概括

氧气兴奋剂增强了阿尔吉罗代特固体电解质,以提高电池的稳定性. 这项研究优化了氧气源和分离器配置,实现了800多个周期,保持了80.2%的容量.

科学领域:

固态电解质固态电解质
材料科学是一种材料科学.
电化学电化学电化学

背景情况:

阿吉罗代特固体电解质,如Li6.6Si0.6Sb0.4S5I,具有高离子导电性,但稳定性不佳.
这限制了它们在先进电池技术中的实际应用.
制定改善电解质稳定性的策略对于下一代能源存储至关重要.

研究的目的:

研究氧气兴奋剂作为一种提高Li6.6Si0.6Sb0.4S5I的化学和电化学稳定性的方法.
为了比较不同氧源 (Li2O和Sb2O5) 对电解质性能的影响.
优化分离器配置,以提高电池循环稳定性.

主要方法:

使用Li2O和Sb2O5作为来源进行氧气兴奋剂的比较分析.
复合电解质和分离器配置的制造.
电化学测试,包括长期循环稳定性和衰老测试.

主要成果:

氧气兴奋剂显著提高了阿吉罗酸电解质的稳定性.
2O兴奋剂增强了电化学稳定性,而Sb2O5兴奋剂提高了空气稳定性.
确定了一个最佳的分离器配置 (Li3.25InCl5.75O0.25/Li6.6Si0.6Sb0.4S4.9IO0.1-Li2O).
带有优化分离器的电池在3.9V (与Li-In相比) 的800个周期中表现稳定,性能稳定.

结论:

氧气兴奋剂是一种有效的策略,可以克服 argyrodite 固体电解质的稳定性限制.
选择氧气源对实现的稳定性增强的类型具有关键影响.
开发的复合材料分离器配置使固态电池具有高性能和长周期寿命.

关键词:

二氧化 (Li2O) 是一种 6.6Si0.6Sb0.4S5I 6.6Si0.6Sb0.4S5I 6.6Si0.6Sb0.4S5I 6.6Si0.6Sb0.4S5I 6.6Si0.6Sb0.4S5I 6.6Si0.6Sb0.4S5I 6.6Si0.6Sb0.4S5I 6.6Si0.6Sb0.4S5I 6.6Si0.6Sb0.4S5I 6.6Si0.6Sb0.4Sb0.4S5I 6.6Si0.6Sb0.4Sb0.4Sb0.4Sb0.5I 6.6Si0.6Sb0.4Sb0.4Sb0.4Sb0.4Sb0.4Sb0.4Sb0.4Sb0.4Sb 没有使用兴奋剂.这就是Sb2O5O5的含量.空气耐用性耐空气耐用性电化学稳定性电化学稳定性

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Ionic Bonding and Electron Transfer

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