用于具有低N/P比的稳定金属电池的双硫酸盐电解质
Kejia Zhang1, Qi Kang1, Junyi Hua2
1Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|November 10, 2025
概括
一种新的双硫酸盐电解质 (DSE) 在金属阳极上促进稳定,富含无机的固体电解质间相 (SEI),增强金属电池 (SMB) 的循环稳定性和性能.
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:
- 金属电池 (SMB) 是下一代储能电池的前景.
- 传统的碳酸盐电解质会在阳极上产生不稳定的固体电解质界面 (SEI),阻碍性能.
- 开发具有改善兼容性的电解质对于稳定的中小企业至关重要.
研究的目的:
- 开发一种新的电解质,用于在金属阳极上稳定形成SEI.
- 调查电解质化学在SEI组成和稳定性中的作用.
- 为了提高金属电池的循环性能和寿命.
主要方法:
- 双硫酸盐电解质 (DSE) 的设计和合成.
- 在阳极上SEI形成的电化学特征.
- 装配和测试使用DSE和高负荷阴极的SMB.
- 长期自行车性能评估.
主要成果:
- DSE促进形成具有硫化物复合物的溶剂衍生,无机主导的SEI.
- DSE加速了阳极被动化,并提高了SEI的稳定性.
- 患有DSE的中小企业在450个循环 (100μm Na) 后实现了85%的容量保留,在200个循环 (50μm Na) 后达到86%.
结论:
- 双硫酸盐电解质通过强大的无机SEI有效地稳定了金属阳极.
- DSE可使金属电池具有高性能和长周期寿命.
- 这种电解质设计为先进的基于的储能解决方案提供了途径.
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