用于超长寿命离子电池的微量酒精电解质具有双位键和调节的溶解结构
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Updated: Jun 14, 2025

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Published on: September 29, 2020
Yijun Zhai1, Bin Xie1, Chaohe Zheng2
1College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, PR China.
甲基醇 (THFA) 通过定水分子来抑制水性离子电池中的树突. 这使得超长寿命的,无树的阳极能够更安全,更具成本效益的储能.
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) 提供安全性和成本优势,但受到树突和副作用的影响.
- 树突的形成和寄生性反应限制了AZIBs的循环寿命和实际应用.
研究的目的:
- 开发一种有效的策略,以减轻AZIBs中的树突和副作用.
- 为了实现AZIB的超长周期寿命,使用酒精电解质.
主要方法:
- 作为一个电解质添加剂使用的四基醇 (THFA).
- 进行理论计算和实验验证.
- 研究了THFA与水分子的相互作用及其对离子溶解和沉积的影响.
主要成果:
- THFA通过双站式键定水分子,限制水的活动.
- THFA 增强了离子溶解动力学,并改善了沉积动态.
- 使用2%THFA的 Zn 对称电池实现了8800小时的循环寿命.
- 一个含有2%THFA的Zn//VO2全细胞在2000个循环后在5A g-1下保持了80.03%的容量.
结论:
- THFA有效地抑制树突和AZIBs中的不良反应.
- 具有双部位键的酒精化合物为无树的AZIB提供了一种实际的方法.
- 开发的战略带来了具有成本效益,高效率和稳定的水性能量储存系统.
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