高压固态电池的增强循环性能通过现场阴极-电解质接口建设
Shiyu Cao1,2, Zhangmancang Xu2, Wenfeng Shi1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
ACS applied materials & interfaces
|March 10, 2025
概括
聚合物电解质中的残留溶剂会影响电池性能. 添加二酸 (LDFP) 形成了一层保护层,增强固态电池的稳定性和循环.
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
- 聚合物科学 聚合物科学
背景情况:
- 基于聚乙烯化物 (PVDF) 的聚合物电解质与溶剂-Li+复合物提供快速离子导电.
- 然而,由于残留溶剂效应,这些电解质与高压阴极的兼容性不佳.
研究的目的:
- 为了研究残留溶剂对离子运输和聚合物电解质界面稳定性的影响.
- 制定一种策略,以提高基于PVDF的电解质与高压阴极的兼容性.
主要方法:
- 使用了计算模拟和实验分析.
- 二酸 (LDFP) 被引入为复合式阴极中的牺牲添加剂.
- 固态电池接口的表征和性能评估.
主要成果:
- 剩余溶剂的分解导致LiNi0.8Co0.1Mn0.1O2 (NCM) /Li电池中不均和不稳定的阴极-电解质介面 (CEI).
- 在现场,LDFP添加剂形成了一个强大的,均的,富含无机物CEI层.
- 通过LDFP吸附NCM催化部位的被动化可以提高界面稳定性.
结论:
- 控制残留溶剂含量对于优化聚合物电解质性能至关重要.
- LDFP作为构建稳定的CEI层的有效添加剂,使固态电池能够长期循环使用.
相关概念视频
Batteries and Fuel Cells
26.8K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
26.8K
Voltaic/Galvanic Cells
56.0K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
56.0K


