固体电解质接口膜成型和表面稳定双功能1,2-Bis((trimethylsilyl) oxy) 为基离子电池的新型电解质添加剂
Weijiang Cheng1, Na Li2, Jingcheng Liu2
1The State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
ACS applied materials & interfaces
|October 25, 2023
概括
一种新的电解质添加剂,1,2-bis((trimethylsil) oxy) (BTMSB),通过形成强大的固体电解质介相 (SEI) 来稳定离子电池 (LIB) 中的阳极. 这提高了电池性能和周期寿命.
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:
- 阳极为离子电池 (LIB) 提供高容量,但受到体积膨胀的影响,导致性能降低.
- 电极-电解质间相的不稳定性是基于的LIBs的一个主要挑战.
研究的目的:
- 研究1,2-bis((trimethylsil) oxy) (BTMSB) 作为基于的LIBs的双功能电解质添加剂.
- 通过减轻体积膨胀和稳定固体电解质间相 (SEI) 来提高阳极的稳定性和性能.
主要方法:
- 合成和表征BTMSB作为一个电解质添加剂.
- 用BTMSB对LIB半电池中的SiO/C阳极进行电化学测试.
- 评估NCM523SiO/C囊细胞与BTMSB的周期性能和速率能力.
主要成果:
- 在阳极表面上,BTMSB形成了统一,坚固,富含LiF的SEI,适应体积膨胀.
- BTMSB有效地清除酸 (HF),进一步稳定了SEI.
- 使用2%BTMSB的SiO/CLi电池在400个循环后保持了69%的容量,显示出更好的循环性能和速率能力.
- 基于Si的阳极细胞和NCM523SiO/C囊细胞表现出卓越的循环性能.
结论:
- BTMSB是一种有前途的双功能电解质添加剂,用于基LIBs.
- 开发的添加剂增强了电极的稳定性,并促进了离子运输,这对于商业化至关重要.
- 这项研究为开发带有阳极的高能量密度LIB提供了宝贵的见解.
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