长循环和高压固态金属电池由化和交联聚乙烯电解质启用
Jie Zhu1,2, Ruiqi Zhao1,2, Jinping Zhang1,2
1The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.
Angewandte Chemie (International ed. in English)
|March 5, 2024
概括
研究人员开发了一种用于固态金属电池的新型化凝聚合物电解质 (FGPE). 这种FGPE增强了安全性,并使更高的操作电压成为可能,为下一代储能铺平了道路.
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
- 聚合物化学 聚合物化学
背景情况:
- 固态金属电池 (LMB) 提供高能量密度和安全性,但受到聚合物电解质氧化稳定性的限制.
- 聚,通常使用的聚合物电解质,限制了高压电池中的应用.
研究的目的:
- 为高压LMB开发一种具有增强氧化稳定的新型聚合物电解质.
- 为了提高聚合物电解质与金属和高压阴极的兼容性.
主要方法:
- 在现场制造化和交联聚乙烯基凝聚合物电解质 (FGPE).
- 电化学表征包括氧化电位测量.
- 在各种条件下使用LiLiNi0.6Co0.2Mn0.2O2电池进行电池性能测试.
主要成果:
- FGPE具有5.1V的高氧化潜力.
- 带有FGPE的电池表现出极好的循环稳定性 (1000个循环,78%的保留率) 并以4.7V工作.
- 在实际条件下实现了稳定的性能,包括高阴极负载和18650型电池.
结论:
- 化聚乙烯电解质显著提高了氧化稳定性和界面兼容性.
- FGPE可实现实用的高压LMB,提高安全性和能量密度.
- 这项研究为开发下一代电池的先进聚合物电解质提供了洞察力.
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