对于全固态金属电池的稳定氧化-化快速离子导体
Baochen Ma1, Ruhong Li1,2, Haotian Zhu1
1State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
Advanced materials (Deerfield Beach, Fla.)
|May 2, 2024
概括
研究人员开发了新的氧化化固体电解质 (ONSE),以防止固态电池中的树生长. 这些可持续的电解质表现出卓越的稳定性和导电性,使电动汽车和电网存储的电池寿命更长.
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:
- 可充电全固态金属电池 (ASSLMB) 对电动汽车和电网存储至关重要.
- 在固态电解质 (SSE) 中 (Li) 树突的生长阻碍了ASSLMB的实际应用.
- 有效的SSE需要与Li的化学稳定性,快速的Li传输和高的接口能量.
研究的目的:
- 设计和合成新型,低成本和可持续的氧化化固体电解质 (ONSE).
- 调查ASSLMB中的ONSE的树抑制能力.
- 为了评估在Li,R,Li对称电池和ASSLMB中的ONSE的电化学性能和稳定性.
主要方法:
- 合成LixN<0xE1><0xB5><0xA7>I<0xE2><0x82><0x9B>-qLiOH (x = 3y + z,0 ≤ q ≤ 0.75) 氧化化固体电解质 (ONSE) 的方法.
- 对的化学稳定性,接口能量和离子导电性进行ONSE的表征.
- 用LiCoO2阴极对立的Li干电池和ASSLMB中对ONSE进行电化学测试.
主要成果:
- 合成的ONSE表现出与Li的化学稳定性和高界面能量 (>43.08 meV Å-2),有效地抑制了Li的树突成长.
- 由于 Li-N 键的离子性增加,ONSE 显示出更好的热力学氧化稳定性 (>3 V 与 Li+/Li 相比).
- 优化的ONSE实现了0.52mS cm-1的离子导电性,使Li32dSiLi对称细胞能够在500多个小时内稳定循环.
- 毕莱尔ONSE/Li3InCl6电解质在500个循环中提供了90%的容量保留.
结论:
- 已开发的ONSE为抑制ASSLMBs中的树增长提供了一个有希望的解决方案.
- 这些可持续和稳定的电解质提高了固态电池的安全性和寿命.
- 这些发现为ASSLMB在苛刻的储能系统中的实际应用铺平了道路.
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