电解质可以减少电阻阻,提高离子电池的快速充电
Chang-Xin Zhao1, Zeyi Wang1, David Jacobson2
1Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, USA.
概括
离子电池的快速充电受到溶剂退出的限制. 具有弱阴离子溶解的新电解质可以快速充电电动汽车的厚度,能量密度的电极.
科学领域:
- 电化学
- 材料科学
- 能量储存
背景情况:
- 快速充电对于电动汽车中的高能离子电池至关重要.
- 目前的优化方法通常通过改变电极结构来降低能量密度.
- 在厚电极中快速充电的障碍尚未完全理解.
研究的目的:
- 研究厚电极快充的局限性.
- 确定溶剂动力学和电阻在充电限制中的作用.
- 开发新的电解质策略来克服这些障碍.
主要方法:
- 在多孔电极中分析了溶剂吸收和电阻极化.
- 设计和合成具有量身定制的溶解性质的新型电解质.
- 在厚电极电池配置中测试这些电解质的性能.
主要成果:
- 证明溶剂吸收和电阻极化限制厚电极快速充电.
- 使用二化溶剂开发了弱阴离子溶解和强阴离子溶解的电解质.
- 在13分钟内实现80%的充电,
结论:
- 弱阴离子溶解和强阴离子溶解有效地减轻电阻极化.
- 设计的电解质可以显著地加快能量密度的电池的充电.
- 这种方法克服了电动汽车电池快充的关键障碍.
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