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局部电解质谷物工程,以抑制全固态电池中的入侵

Han Su^1,2, Yang Hu², Minkang Wang¹

¹State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310027, China.

Advanced materials (Deerfield Beach, Fla.)

|March 6, 2025

概括

研究人员开发了一种用于固体电解质的新型谷物工程方法,以提高全固态金属电池的性能. 这种方法增强了离子的可逆性,并抑制了的入,使2000多个循环.

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:

(Li) 侵入显著降低了全固态金属电池的循环耐用性和速度能力.
传统的固体电解质 (SE) 工程,就像兴奋剂一样,在抑制入侵方面取得了有限的成功,原因是优化多个宏观性质的困难.
当前的方法往往涉及复杂的,试错过程SE修改.

研究的目的:

开发一种新的策略,在谷物聚合物层面设计固体电解质 (SE),超越传统的晶体尺度修改.
通过有效抑制Li入侵,提高全固态金属电池的循环耐用性和速率能力.
引入一种可扩展和高效的SE修改方法.

主要方法:

采用利用热力学有利的离子交换反应的可扩展化学方法,在 argyrodite 类型的电解质颗粒上创建无形金属化合物层.
引入了局部化的谷物工程概念,将修改和未修改的电解质粒结合起来,形成具有优化的宏观性质的聚合物.
这些局部化的谷物工程电解质聚合物的性能在全固态金属电池电池中进行了评估.

主要成果:

工程设计的无形金属化合物层有效地改变了电解质颗粒的表面特性.
局部化的谷物工程电解质聚合物显示显著增强了的可逆性.
在实际操作条件下,这些工程聚合物成功地抑制了Li的入,一个Li的干NCM电池在1.6mA cm-2.2时实现了2000多个稳定周期.

结论:

在谷物聚合物水平上优化固体电解质为抑制Li入侵提供了与传统晶体尺度工程相比有前途的替代方案.
开发的本地化谷物工程策略提供了一种高效和可扩展的方法来提高固态金属电池的性能.
这种方法显著提高了电池循环耐用性和速率能力,为实际应用铺平了道路.

关键词:

李入侵李入侵李入侵完全固态的金属电池.固体电解质工程固体电解质工程

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