对负LiIn修饰阳极及其与β-Li3PS4固体电解质的相互作用进行计算研究,用于电池应用
Naiara Leticia Marana1, Fabrizio Silveri1,2, Eduardo de Oliveira Gomes3
1Chemistry Department, University of Torino, via P.Giuria 5, 10125 Torino, Italy. anna.ferrari@unito.it.
Physical chemistry chemical physics : PCCP
|May 20, 2024
概括
在所有固态电池中,-合金阳极表现出了显著的稳定性. 这项研究通过检查与固体电解质的批量和接口特性来解释它们在金属上的优越性能.
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
- 计算化学计算化学
背景情况:
- 全固态电池 (ASSLB) 提供更高的能量密度,但与 (Li) 金属阳极反应性面临挑战.
- 化层或合金阳极对于改善ASSLB中金属阳极的长期循环能力至关重要.
研究的目的:
- 为了阐明LiIn合金阳极在延长循环过程中的特殊稳定性.
- 为了比较LiIn合金与Li-金属阳极的散装和接口特性.
主要方法:
- 密度函数理论 (DFT) 用于深入分析.
- 研究了与β-Li3PS4固体电解质接口上的LiIn表面形成和结构稳定性.
- 分析了包括凝聚力能量,费米水平和带位置在内的散体特性.
主要成果:
- 几个LiIn面表现出显著的结构稳定性,其中 (110) 面是最稳定的.
- 在LiIn和β-Li3PS4之间的稳定接口表现出良好的粘附性和低张力能量.
- DFT分析揭示了影响阳极稳定的散装性质的关键差异.
结论:
- 在稳定的ASSLB中,LiIn合金阳极为Li-metal阳极提供了一个有希望的替代品.
- 了解接口特性和散装特性对于设计高性能固态电池至关重要.
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