素电化学使得补充/素双离子电池具有增强的容量和循环能力
Kaiqiang Zhang1,2, Qianchuan Yu1, Jingjie Sun1
1State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Clean Energy Catalysis and Intelligent Green Chemical Engineering, Suzhou Key Laboratory of Green Intelligent Manufacturing of New Energy Materials and Devices, Tianchang New Materials and Energy Technologies Research Center, Institute of Green Chemistry and Engineering, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, P. R. China.
研究人员为可充电双离子电池开发了一种新的素电化学策略. 这种方法使用小离子,如化物,以提高电池性能,为传统离子电池提供了有希望的替代品.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 可充电的双离子电池为快速充电和电网存储提供了潜力.
- 目前的局限性包括缓慢的动力学,低容量和由于体积大的离子而导致的耐用性差.
研究的目的:
- 引入一种新的素电化学策略,以提高双离子电池性能.
- 为了利用小型素离子作为电荷载体进行高效的离子氧化还原反应.
主要方法:
- 使用小素离子,特别是化物离子,作为电荷载体.
- 研究了石墨,Co-BDC和ZIF-67作为阴极材料.
- 进行了电化学和光谱分析,以了解电荷存储机制.
主要成果:
- 化物离子表现出优越的电化学性能.
- 使用石墨,Co-BDC和ZIF-67阴极分别实现了197 226 和291 mAh g-1的特定容量.
- 通过用小素离子取代大离子,证实了增强的离子储存和氧化还原动力学.
结论:
- 素电化学为高性能双离子电池提供了一种新方法.
- 小型素离子克服了与大型离子相关的限制.
- 这一战略使可扩展和高效的储能解决方案成为可能.
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