对CFX的KOH诱导的表面脱和化,用于超高功率密度初级电池
Ruiping Chen1,2, Yifan Jia1,3, Xiao Feng1,3
1State Key Laboratory of Structural Chemistry, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350108, China.
ChemSusChem
|October 23, 2025
概括
一种新的一步方法通过用KOH修改CFx表面来增强/碳 (Li/CFx) 电池. 这提高了导电性和反应动力学,大大提高了高性能电池的功率和能量密度.
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:
- 低功耗能力是/化碳 (Li/CFx) 电池的一个关键挑战.
- 表面修饰提高了CFx导电性和动力学,但目前的方法复杂,产生不均的产品.
研究的目的:
- 开发一种简单,有效的方法来修改CFx阴极的表面.
- 提高Li/CFx电池的电化学性能,重点关注功率和能量密度.
主要方法:
- 一个单阶段的液相反应,使用氧化 (KOH) 作为除剂.
- 在CFx材料上进行受控的表面除和-OH接种.
- 使用电化学测试对修改后的CFx进行表征.
主要成果:
- KOH处理在CFx上产生了超薄 (≈1 nm) 的石墨烯类导电涂层,增强了离子和电子传输.
- 接种的 -OH 组增加了半离子 C-F 键,促进了电化学活性.
- 与原始CFx相比,KOH修改的CFx阴极实现了70C的放电能力,98.42kW的kg-1功率密度,95%的能量密度在50C时更高.
结论:
- 一步式KOH方法为大规模制备高功率化碳阴极提供了一种实用方法.
- 这种表面修改策略显著提高了Li/CFx电池的性能.
- 这些发现促进了先进的储能材料的工业应用.
相关概念视频
Batteries and Fuel Cells
30.7K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
30.7K
Ion Exchange
1.1K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.1K


