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可充电碳化物电池的设计和反应机制
Wei Su1, Dongxiao Wang1, Yuanhang Li1,2
1Materials Genome Institute, Shanghai University, Shanghai 200444, China.
ACS nano
|August 20, 2024
概括
研究人员开发了一种具有高能量密度的可充电/碳化物 (CF) 电池. 使用一种新型电解质,他们实现了可逆容量,并促进了改进能源存储系统的转换反应.
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:
- 碳化物 (CF) 阴极具有高的特定容量和能量密度,对于先进的能量存储至关重要.
- 可充电主电池对于电动飞机等应用来说至关重要.
- 由于LiF结晶和高能障碍,Li/CF电池的可逆性受到阻碍.
研究的目的:
- 开发一种可充电的Li/CF电池,具有更高的能量密度和可逆性.
- 研究一种新型电解质在促进可逆电化学反应中的作用.
- 了解Li/CF电池的充放电循环的基础机制.
主要方法:
- 使用一种高压稳定的全化电解质与三三甲基酸 (TMSB).
- 采用*in situ*X射线衍射,*ex situ*软X射线吸收光谱和对分布函数分析.
- 进行密度函数理论计算和核磁共振光谱学.
主要成果:
- 实现了可充电Li/CF电池,可逆容量为465.9mAhg-1和能量密度为1183.9Whkg-1 (53%的第一次放电).
- 在循环过程中确认了Li-F和C-F债券的生成和分解.
- 已证明TMSB通过[TMSB-F]-复合体形成作为离子载体,协助转化反应.
结论:
- 通过使用含有TMSB的电解质,成功实现了可充电Li/CF电池.
- 这项研究为高能量密度,可逆性Li/CF电池提供了一种简单,低成本的方法.
- 这一进步对于开发下一代储能解决方案具有重要意义.
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