液体电解质结构的三维异质性促进了离子电池中离子运输和储存性能
Mengying Ma1, Binbin Chen1,2,3, Huilin Pan1,4
1Department of Chemistry, Zhejiang University Hangzhou 310012 China panhuilin@zju.edu.cn.
Chemical science
|June 9, 2023
概括
研究人员使用碳稀释剂控制了离子电池的电解质结构. 这提高了离子 (Na+) 运输和电池性能,使在室内和高温下能够稳定循环运行.
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
- 解决方案化学 解决方案化学
背景情况:
- 电池中的电解质溶液通常被认为具有同位素分子结构.
- 了解和控制电解质结构对于提高电池性能至关重要.
研究的目的:
- 为了证明电解质溶液结构的可控调节,用于离子电池.
- 研究溶剂相互作用和稀释剂对电解质异质性和Na+运输的影响.
主要方法:
- 在缩酸盐电解质中使用低溶解化碳作为稀释剂.
- 研究了酸盐溶剂和稀释剂之间的分子间力量.
- 分析了电解质异质性对Na+溶解和运输的影响.
主要成果:
- 通过操纵溶剂相互作用与碳稀释剂,引入可调节的电解质异质性.
- 优化的三托烯 (PhCF3) 稀释剂削弱了Na+溶解,创造了局部高Na+度和3D运输路径.
- 证明了溶解结构,Na+储存性能和相间之间强烈的相关性.
结论:
- CF3稀释的缩电解质使离子电池在各种温度下能够更好地运行.
- 实现了硬碳阳极的高可逆容量 (300 mA h g-1) 和卓越的循环寿命 (>1200 循环).
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