有机-无机混合固体复合电解质用于高能量密度电池:结合可制造性,导电性和稳定性
Dries De Sloovere1,2, Jonas Mercken1,2, Jan D'Haen1
1Institute for Materials Research (imo-Imomec), UHasselt and Imec, Agoralaan, Building D, Diepenbeek, 3590, Belgium.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|November 14, 2024
概括
混合固体复合电解质可以提高金属电池的安全性和能量密度. 这些电解质具有高导电性和电极兼容性,可在100个周期内保持100%的容量,用于先进的电池开发.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 固体和准固体电解质是提高金属电池 (LMB) 能量密度和安全性的关键.
- 当前的电解质面临着稳定性,导电性和电极兼容性的挑战.
研究的目的:
- 开发和评估用于高性能LMB的混合固体复合电解质.
- 在新型电解质中结合功能性质,电极兼容性和可制造性.
主要方法:
- 混合固体复合电解质的制造,其中包含离子液体和有机-无机宿主结构.
- 电化学特征包括阳极稳定性,离子导电性和NMC811电极的循环性能.
- 评估电解质与金属和高压正电极的兼容性.
主要成果:
- 在室温下达到阳极稳定性>5V与Li+/Li,离子导电率高达2.7mS cm-1.
- 由于没有强酸,与多孔NMC811电极的兼容性得到证明.
- 使用优化的电解质 (TFSI-作为阴解质,FSI-/TFSI-作为无解质) 的NMC811/Li硬币电池在100个循环后保持了100%的容量.
结论:
- 混合固体复合电解质提供了高性能,安全性和可制造性的独特组合.
- 这些电解质是下一代金属电池的有希望的候选人.
- 定制离子组合 (TFSI- vs. FSI-/TFSI-) 优化了特定电池组件的兼容性.
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