增强的LiMn2O4薄膜电极稳定性在离子液体电解质:抑制Mn溶解的途径
ACS applied materials & interfaces
|July 12, 2023
概括
离子液体显著提高了离子电池的稳定性,防止溶解从旋LiMn2O4阴极,与传统的电解质不同. 这提高了循环性能和电池寿命.
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
- 电池技术 电池技术
背景情况:
- 离子电池 (LIB) 中的螺旋式氧化 (LiMn2O4) 阴极因溶解而面临稳定性问题.
- 溶解的离子降低了阴极结构,加速了阳极容量的衰减,限制了电池的性能.
研究的目的:
- 研究单晶LiMn2O4 (111) 薄膜在循环过程中的结构和界面演变.
- 为了比较LiMn2O4阴极在离子液和常规碳酸盐电解质中在广泛的电压范围内的稳定性.
主要方法:
- 用同步in situ X射线衍射和反射率来监测结构变化.
- 循环电压测量是在2.5-4.3V Li/Li+之间进行的.
- 分析包括感应合等离子体质谱和传输电子显微镜.
主要成果:
- 在imidazolium离子液体电解质中循环运行的LiMn2O4阴极表现出了特殊的稳定性.
- 在离子液体电解质中观察到微不足道的溶解和物质损失.
- 传统的碳酸盐电解质显示了大量的溶解和容量衰减.
结论:
- 离子液有效抑制在LiMn2O4LIB阴极中的溶解.
- 使用离子液体提供了一个有前途的策略,以提高基于LMO的LIB的周期稳定性和寿命.
关键词:
在LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB,LIB这就是LiMn2O4的含量.表面表面的薄膜.在现场 (in situ) 进行.离子液体是一种离子液体.的溶解是的溶解更多相关视频
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