一个预氧化策略,以建立稳定的氧化物阴极/化物固态电解质接口,用于高能量的所有固态电池

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Updated: May 25, 2025

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

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Published on: November 11, 2013

Hanzhou Liu¹, Yang Lu¹, Yanchen Liu¹

¹School of Metallurgy and Environment, Central South University, Changsha, 410083, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|February 28, 2025

概括

一种新的预氧化策略通过形成强大的Y-O键,稳定化物固态电解质,防止具有高能阴极的全固态金属电池 (ASSLB) 的降解.

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:

全固态金属电池 (ASSLB) 提供高能量密度和安全性.
化物固态电解质具有高离子导电性和广泛的电化学窗口.
不稳定的阴极-电解质接口 (CEI) 由于氧-离子相互作用限制了性能.

研究的目的:

开发一种基于Y的化物固态电解质的预氧化策略.
用氧化物阴极增强ASSLB中CEI的稳定性.
提高ASSLBs的电化学性能和循环寿命.

主要方法:

合成了一个预氧化化物固态电解质,Li2YCl2.5Br1.5O0.5 (2LO-0.5).
研究了电解质结构中强大的Y-O键的形成.
使用2LO-0.5和一个LiNi0.83Co0.11Mn0.06O2 (NCM83) 阴极组装的ASSLB.
评估了电化学性能和循环稳定性.

主要成果:

氧化前的策略成功地在2LO-0.5.5中形成了强大的Y-O键.
这防止了不稳定的YOCl的形成,并促进了稳定的基于Y2O3的CEI.
具有2LO-0.5和NCM83的ASSLB实现了208 mAhg-1.1的初始放电能力.
电池在1000个循环后保持了80.6%的容量.

结论:

氧化前策略有效调节化物固态电解质和氧化物阴极之间的界面反应.
强大的Y-O债券是形成稳定的CEI和防止退化的关键.
这种方法使高性能ASSLB的合理设计成为可能.

关键词:

所有固态电池都是固态电池.阴极 - 电解质接口接口中央金属化物基于化物的固态电解质.在氧化前进行氧化.

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