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碳化物作为金属固态电池阳极的添加剂,使强大而亲密的接口成为可能

Pavitra Srivastava¹, Yu-Kai Liao², Kevin Iputera¹

¹Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei, 106, Taiwan.

|July 28, 2023

概括

将碳化 (SiC) 添加到阳极中可以改善与石榴石固态电解质的接触. 这提高了固态金属电池 (SSLMB) 的稳定性和性能.

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
固态化学固态化学

背景情况:

石榴石型固态电解质,如Li6.75La3Zr1.75Ta0.25O12 (LLZTO),由于其稳定性,对固态金属电池 (SSLMB) 是有前途的.
金属阳极和固体电解质之间的接口接触较差,阻碍了SSLMB的实际应用.

研究的目的:

为了改善金属阳极和石榴电解质之间的接口接触和可湿性.
通过解决接口挑战来提高SSLMB的整体性能和稳定性.

主要方法:

将β-碳化物 (β-SiC) 作为阳极中的添加剂.
用于与LLZTO电解质接口工程的Li-SiC复合阳极的制造.
电化学特征的Li-SiCLL下载ZTO下载Li-SiC对称的细胞.

主要成果:

-SiC阳极表现出更好的湿透性和与LLZTO电解质的密切接触.
在接口上的性Li4SiO4相促进了亲密性,而SiC相提供了强度.
优化的电池表现出较低的界面阻抗 (10 Ω cm2) 和最高的循环稳定性高达5800小时.
在室温下实现了高临界电流密度 (4.6 mA cm−2) 和稳定的循环 (1000小时在3.5 mA cm−2).

结论:

使用SiC作为阳极中的复合添加剂,为基于石榴石的SSLMB提供了一个可行的策略.
改进的接口工程对于释放固态金属电池的全部潜力至关重要.
这种方法解决了当前SSLMB技术的关键局限性,为更安全,更有效的能源存储铺平了道路.

关键词:

金属阳极是一种金属阳极.临界电流密度临界电流密度石榴石电解质石榴石的电解质界面修改界面修改界面修改固态电池是一种固态电池.

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