高扬模块Li6.4La3Zr1.4Ta0.6O12 - 基于固体电解质的间相调节沉积,用于无树的金属阳极
Ya-Wen Tian1, Zhi-Wen Yin1, Yi-Fei Wang1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China.
ACS applied materials & interfaces
|July 18, 2024
概括
使用LLZTO纳米颗粒的新型人工固体电解质介相 (SEI) 层增强了金属阳极的稳定性. 这种保护层可以防止腐蚀,并促进的均沉积,提高电池的性能和寿命.
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:
- 人工固体电解质间相 (SEI) 层对于保护 (Li) 金属阳极至关重要.
- 实现均的沉积和防止阳极腐蚀仍然是金属电池开发的关键挑战.
研究的目的:
- 设计和评估一个由Li$_{6.4}$La$_{3}$Zr$_{1.4}$Ta$_{0.6}$O$_{12}$ (LLZTO) 纳米粒子和聚合乙烯的新型人工SEI层.
- 为了研究这种基于LLZTO的SEI对Li阳极保护,Li沉积行为和电化学性能的影响.
主要方法:
- 使用LLZTO纳米粒子和聚合物粘合剂制造人工SEI膜.
- 使用基于LLZTO的SEI对Li对称电池和LiFePO4 (LFP) 电池的电化学测试.
- 分析沉积/剥离行为和长期循环稳定性的分析.
主要成果:
- 基于LLZTO的SEI表现出卓越的机械和化学稳定性,有效防止阳极腐蚀.
- 由于高的Li$^{+}$导电性,SEI引导了均的Li沉积,并加速了电化学反应动力学.
- 李对称细胞维持了600小时的25mV的稳定超电位.
- 在5C的800个循环后,LFP全电池实现了90%的容量保留.
结论:
- 具有高扬模量的人造SEI有效地抑制了树突的形成,并促进了均的涂/剥离.
- 这种基于LLZTO的SEI战略为开发高性能和稳定的金属电池提供了一个有希望的方法.
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