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同质兴奋剂向高度导电和稳定的Li₁₀GeP₂S₁₂固体电解质用于全固态电池

Nini Zhang^1,2, Qinsheng He^1,3, Lu Zhang^1,2

¹Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|July 20, 2024

概括

兴奋剂增强Li10GeP2S12固体电解质,改善耐湿性和电化学稳定性,使更安全,高性能全固态电池.

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:

10GeP2S12具有高离子导电性,但具有较差的防潮性和电化学不兼容性.
这些局限性阻碍了其在全固态电池中的实际应用.

研究的目的:

为了提高Li10GeP2S12作为固体电解质的稳定性和性能.
研究兴奋剂对水分和电化学稳定性的机制.

主要方法:

通过固态化物兴奋剂合成化功能化Li10GeP2S12.
密度函数理论 (DFT) 计算以阐明原子尺度机制.
制造和测试Li-Li对称电池和LiCoO2,全固态电池.

主要成果:

表面剂显著降低水友性,在暴露于水分后保持离子导电性 (2.21 mS cm-1).
大量化促进了空缺,使稳定的涂/剥离能够实现,临界电流密度为2.1 mA cm-2.
全固态电池表现出更好的循环稳定性,在1C的600个循环后保持80.1%的容量.

结论:

兴奋剂是一种有效的策略,可以克服Li10GeP2S12的湿度敏感性和电化学限制.
改造的固体电解质显示出开发稳定和高性能全固态电池的前景.

关键词:

Li10GeP2S1212 的使用情况所有固态电池都是固态电池.化物兴奋剂化物兴奋剂金属的兼容性金属的兼容性湿度稳定性湿度稳定性

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Ionic Bonding and Electron Transfer

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Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.