没有金属的无性电解质,具有弱键,用于高速率和超稳定的离子电池
Hu Hong1, Jiaxiong Zhu1, Yiqiao Wang1
1Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, China.
Advanced materials (Deerfield Beach, Fla.)
|November 2, 2023
概括
离子 (NH4+) 电池提供可持续的,低成本的能源存储. 这项研究设计了弱溶解电解质,提高了先进的NH4+电池的稳定性和性能.
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
- 可持续能源 可持续能源
背景情况:
- 对可持续电池化学的需求日益增长.
- 离子 (NH4+) 电池具有低成本,无毒性和环境效益.
- 了解溶解相互作用是NH4+电池开发的关键.
研究的目的:
- 在NH4+和溶剂之间显露溶解相互作用.
- 提出NH4+弱溶解电解质的设计原则.
- 开发高性能和稳定的NH4+电池.
主要方法:
- 研究了基于结的NH4+溶解相互作用.
- 拟议的电解质设计原则侧重于溶剂的静电潜力.
- 使用 succinonitrile. 构建了一个无金属的超电解质 (MEE).
- 评估电池性能,包括速度能力和循环稳定性.
主要成果:
- 确定了溶剂静电电位作为NH4+溶解强度的关键因素.
- 开发了一种具有扩大电化学稳定性窗口的弱溶MEE.
- 实现了较低的溶解能量屏障和更快的电荷转移.
- 证明了卓越的可逆速率能力 (65Wh kg-1在600W kg-1上) 和长期循环稳定性 (在1000个循环后保持90.2%).
结论:
- 弱键电解质对于高性能NH4+电池至关重要.
- 拟议的设计方法为开发稳定和高速率的NH4+储能系统提供了指导方针.
- 这项工作推动了可持续的非金属电池化学领域的发展.
相关概念视频
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