Structural optimization and electrocatalyst utilization in air cathodes have been identified as two major factors affecting the overall performance of a lithium-air battery. Herein, a cobalt@porous carbon composite, Co@C(700-1000) was obtained by facile annealing of a Co/Zn-bimetallic metal-organic framework (MOF). In the Co/Zn-MOF, cobalt cluster was used as a precursor of the catalyst and zinc cluster as a sacrificial template to generate meso- and macropores. The lithium-air battery with the assembled Co@C(700-1000) air cathode revealed a specific capacity as high as 4 mAh cm−2. Furthermore, the battery exhibited high cycling stability up to 67 cycles (limited capacity of 0.5 mAh cm−2). The high cell performance can be in relation to the catalytic activity of uniformly disseminated cobalt nanoparticles in the porous carbon matrix and the rapid diffusion and transport of Li+ and O2 owing to the optimized pore-distribution characteristics. Using a bimetallic MOF-derived material, this study sheds fresh light on the design of an air cathode for lithium-air batteries.
|Number of pages||11|
|Journal||International Journal of Energy Research|
|Publication status||Published - 2022 Jun 10|
Bibliographical noteFunding Information:
Ministry of Education, Grant/Award Number: 2019R1F1A1062290; National Research Foundation of Korea Funding information
This study was supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Education (MSIT) [grant number 2019R1F1A1062290].
© 2022 John Wiley & Sons Ltd.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Nuclear Energy and Engineering
- Fuel Technology
- Energy Engineering and Power Technology