将侧链固定在碳酸盐组上,用于恢复稳定的聚碳酸盐基固态金属电池
Hantao Xu1,2, Wei Deng1, Jingyuan Yu1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, P. R. China.
研究人员开发了一种新的聚碳酸电解质用于固态金属电池. 通过固侧链,他们创造了一个受限制的形状,防止界面降解,使1000多个小时的稳定循环.
科学领域:
- 材料科学
- 电化学
- 聚合物科学
背景情况:
- 聚碳酸电解质为固态金属电池 (LMB) 提供更宽的电化学窗口和更高的离子导电性.
- 一个主要的挑战是由于与金属阳极的副作用而导致的聚碳酸盐的界面降解.
- 这种降解限制了LMB的长期稳定性和性能.
研究的目的:
- 抑制基于聚碳酸的电解质在固态LMB的界面降解.
- 提高金属电池的稳定性和循环性能.
- 展示一种改善固态电池电解质的新策略.
主要方法:
- 设计了一种基于聚碳酸的电解质,在现场固定侧链以形成受限制的构造.
- 在聚碳酸结构中利用受限制的形状来屏蔽可降解的键.
- 在Li/Li细胞和LiNi0.8Co0.1Mn0.1O2/Li囊细胞中研究了电解质的性能.
主要成果:
- 保护的聚碳酸电解质在0.5mA cm-2下显示了超过1000小时的Li/Li电池稳定循环.
- 该策略有效地抑制了电解质和金属阳极之间的接口接触和降解.
- 组装的LiNi0.8Co0.1Mn0.1O2/Li袋式电池显示了循环性能的显著改善.
结论:
- 通过固定侧链构建受限构造是基于聚碳酸的高度稳定的固态LMB的可行策略.
- 这种方法有效地减轻了接口降解,为更强大的金属电池技术铺平了道路.
- 这些发现为开发先进的固态电池电解质提供了有希望的方向.
更多相关视频
07:20Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
Published on: January 20, 2023
07:55Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
Published on: April 17, 2018
相关概念视频
Anionic Chain-Growth Polymerization: Overview
Anionic Chain-Growth Polymerization: Mechanism
Cationic Chain-Growth Polymerization: Mechanism
Ionic Bonding and Electron Transfer
Complexation Equilibria: Factors Influencing Stability of Complexes
Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
