用于高压金属电池的半溶解电解质
Zhihong Piao1, Xinru Wu1, Hong-Rui Ren1
1Tsinghua-Berkeley Shenzhen Institute & Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
Journal of the American Chemical Society
|October 27, 2023
概括
一种新的半溶解电解质提高了高压金属电池 (LMB) 的稳定性. 这一突破提高了温度和循环的性能,使得更安全,高能量密度的能量储存成为可能.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 高压金属电池 (LMB) 具有丰富的阴极对于高能量密度至关重要.
- 目前局部高度电解质 (LHCE) 显示出良好的阳极可逆性,但热和电化学稳定性较差.
研究的目的:
- 通过设计局部化高度电解质 (LHCE) 溶解结构,开发用于高压LMB的稳定电解质.
- 克服使用单一双功能溶剂的传统LHCE的局限性.
主要方法:
- 设计和合成一种新型半溶解单溶液电解质.
- 对电解质对金属阳极和丰富阴极的稳定性的电化学评估.
- 在各种温度和电压条件下测试LiadosaNi0.8Co0.1Mn0.1O2电池的性能.
主要成果:
- 设计的电解质成功模仿了LHCE溶解结构,增强了稳定性.
- 抑制树脂的生长,电极降解 (相位过渡,微裂变) 和过渡金属溶解.
- 电池在20°C至60°C稳定运行,在100次循环后保持95.6%的电容,在180次循环后保持80%的电容.
结论:
- 半溶解的单溶剂电解质为先进的电解质工程提供了新的策略.
- 这种方法显著提高了高压金属电池的稳定性和安全性.
- 能够开发下一代高密度储能解决方案.
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