对离子电池的多层金属氧化物阴极的阳离子诱导的统一和坚固的阴极-电解质介面
Minli Wu1, Bei Zhang1, Yonghuang Ye2
1Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
ACS applied materials & interfaces
|March 15, 2024
概括
将三氧化甲基 (TMSI) 添加到电解质中可以提高离子电池的阴极稳定性. 这创建了一个保护界面,增强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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 层层的金属氧化物对离子电池 (SIB) 显示出希望.
- 由于相位过渡和副作用,循环表现不佳阻碍了商业化.
- 开发稳定的阴极/电解质接口 (CEI) 对SIB至关重要.
研究的目的:
- 为了提高SIB中层层的金属氧化物阴极的循环稳定性.
- 为了研究三氧化甲基 (TMSI) 对阴极/电解质接口的影响.
- 通过电解质修改来提高SIB的整体性能.
主要方法:
- 使用trimethoxymethylsilane (TMSI) 进行电解质修饰.
- 调离子溶解结构形成一个稳定的CEI.
- 在改性电解质中对NaNi1 / 3Fe1 / 3Mn1 / 3O2 (NFM) 阴极进行电化学测试.
主要成果:
- 添加TMSI形成一个稳定的,含的CEI,抑制副作用.
- 在TMSI修饰的电解质中的NFM阴极在200个循环后显示了74.4%的容量保留率 (相对于裸体电解质的51.5%).
- 观察到更好的动力学,速度能力,库伦比克效率和高温性能.
结论:
- 在SIB中,TMSI有效地稳定了阴极/电解质接口.
- 使用TMSI进行电解质修改显著提高了NFM阴极的循环性能和耐用性.
- 这一战略为高性能离子电池的商业化提供了一个有前途的途径.
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