期刊
SMALL
卷 18, 期 45, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202203917
关键词
Cu-based porphyrin; density functional theory; high-rate; Li-CO; (2) batteries
类别
资金
- Natural Science Foundation of Jiangsu Province [BK20210616]
- National Natural Science Foundation of China [51602153]
- National Defense Technology Innovation Special Zone Spark Project [2016300TS00911901]
- Jiangsu Key Laboratory of Electrochemical Energy-Storage Technologies [EEST2021-2]
- Postgraduate Research & Practice Innovation Program of NUAA [xcxjh20210605]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
In this study, Cu-TCPP nanosheets were successfully prepared through solvothermal method and applied as a catalyst in Li-CO2 batteries, leading to improved performance with higher discharge capacity and lower overpotential.
The lithium-carbon dioxide (Li-CO2) battery as a novel metal-air battery has a high specific energy density and unique CO2 conversion ability. However, its further development is limited by incomplete product decomposition resulting in poor cycling and rate performance. In this work, Cu-tetra(4-carboxyphenyl) porphyrin (Cu-TCPP) nanosheets are prepared through the solvothermal method successfully. An efficient Li-CO2 battery with Cu-TCPP as catalyst achieves a high discharge capacity of 20393 mAh g(-1) at 100 mA g(-1), a long-life cycle of 123 at 500 mA g(-1), and a lower overpotential of 1.8 V at 2000 mA g(-1). Density functional theory calculation reveals that Cu-TCPP has higher adsorption energy of CO2 and Li2CO3 compared with TCPP, and a large number of electrons gather near the Cu-N-4 active sites in Cu-TCPP. Therefore, the excellent CO2 capture ability of the porphyrin ligand and the synergic catalytic effect of Cu atom in Cu-TCPP promote the thermodynamics and kinetics of CO2 reduction and evolution processes.
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