基于硫酸盐的电解质化学与离子双极相互作用和强大的相间实现宽温度离子电池
Hao-Jie Liang1,2, Wen-Yu Qian1, Han-Hao Liu1
1Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China.
Journal of the American Chemical Society
|May 17, 2025
概括
一种新的基于硫酸盐的循环电解质可使离子电池 (SIB) 在零下60°C至60°C的温度下运行. 这一突破促进了全天候储能系统的发展.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 传统的以太和碳酸盐电解质在恶劣的环境中难以适应广泛的温度.
- 开发高温和低温电解质仍然是离子电池 (SIB) 的一个重大挑战.
研究的目的:
- 制造一种基于环状硫酸盐的新型电解质,用于在SIB中实现广泛的温度操作.
- 通过离子协调和相间形成,研究使高温和低温兼容的机制.
主要方法:
- 一种基于硫酸盐的循环电解质的配方.
- 调节离子双极相互作用以控制离子协调状态.
- 对离子和添加物的协同分解进行分析,以形成强大的介面相.
- 在60°C至60°C的温度下测试SIB的电化学性能.
主要成果:
- 循环硫酸盐电解质使SIB在-60°C工作.
- Na3V2 ((PO4) 2O2F 阴极在 - 50 °C 显示 58 mA hg-1,在 60 °C 300 个循环后保持 80%.
- 其他阴极 (Na3V2(PO4) 3,NaFe1/3Ni1/3Mn1/3O2) 在-60°C时具有50和65 mA hg-1的电容.
- 一个Ah级袋式电池在-40°C下保持了56%的容量.
结论:
- 新的电解质配方成功实现了SIB的广泛温度操作.
- 精确控制离子协调和相间工程是高温和低温性能的关键.
- 这项工作为开发强大的全天候SIB系统铺平了道路.
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