期刊
ADVANCED MATERIALS TECHNOLOGIES
卷 6, 期 3, 页码 -出版社
WILEY
DOI: 10.1002/admt.202000941
关键词
effects; high electrochemical performance; metal ions; supercapacitors; ultra‐ thin conductive metal‐ organic frameworks
资金
- Ministry of Science and Technology of China [2012CB933403]
- Beijing Natural Science Foundation [2182086]
- National Natural Science Foundation of China [51425302, 51302045]
- CAS-TWAS President's PhD Fellowship program
- Beijing Municipal Science and Technology Commission [Z121100006812003]
- Chinese Academy of Sciences
This study prepared two high-performance ultra-thin redox conductive 2D MOFs for supercapacitors, investigated the effects of metal ions on the capacitive performance of MOF electrodes, and found that different metal ions endow MOFs with different redox behaviors and conductivities.
Conductive metal-organic frameworks (MOFs) are promising electrode materials for supercapacitors (SCs) because of their tunable structures, high specific surface areas, and superior conductivity. However, it remains challenging to develop conductive MOFs for organic SCs and the role of metal ions in the electrochemical performance of MOFs is still unclear but is shown to be a key factor in determining MOFs performance. Herein, two high-performance ultra-thin redox conductive 2D MOFs (>6000 S m(-1)) for SCs are prepared, and the effects of metal ions on the capacitive performance of MOF electrodes are investigated. Co2+ and Mn2+ with the same ligand provide two MOFs featuring almost the same structures and specific surface areas but show great differences in electrochemical performance except that both MOFs exhibit outstanding electrochemical performance and good cycling stability with a capacity retention of >85% after 10 000 cycles. Different metal ions endow the two MOFs with different redox behaviors, conductivities, and energy levels, where Co-MOF shows superior specific capacity compared to Mn-MOF. This work expands the possibility of the use of MOFs in SCs and gives insight into the roles of metal ions in MOFs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据