作为双功能电解质添加剂的sec-butanol有效地提高了V2O5Zn电池的电化学性能
Shuo Yang1, Guangpeng Wu2, Jing Zhang2
1School of Physics, State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China, Chengdu 611731, China; Research Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China.
塞克-布坦醇 (SBT) 通过改善电解质相互作用和抑制树生长来增强水性离子电池 (AZIB). 这使得V2O5//Zn电池的循环稳定性和容量大大提高.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性离子电池 (AZIB) 提供安全,经济高效和环保的能源存储.
- 商业化受限于树突的生长和较差的阴极-电解质相互作用,导致容量减弱.
研究的目的:
- 为了提高AZIB的性能,使用sec-butanol (SBT) 作为双功能电解质添加剂.
- 为了研究SBT对Zn2+溶解和电极可湿度的影响.
主要方法:
- 将sec-butanol (SBT) 添加到1M Zn(ClO4) 2水性电解质中.
- 对Cu//Zn半电池和V2O5//Zn全电池进行电化学性能测试.
主要成果:
- SBT重塑了Zn2+溶解结构,并抑制了二维扩散.
- 在V2O5阴极上,SBT提高了电解质的湿透性.
- Cu//Zn细胞在1000个循环中表现出稳定的循环,在5 mA cm-2.
- V2O5//Zn电池实现了247.78 mAh g-1 在4 A g-1.
结论:
- 塞克-布坦醇有效地减轻了树的生长,并提高了AZIBs中的电化学性能.
- SBT 改善了 Zn2+ 离子管理和电极接口特性.
- 修改后的电解质使得水性离子电池具有高性能和稳定性.
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