Ant-cave-structured nanopore-embedded CoMn2O4 microspheres with stable electrochemical reaction for Li+-air battery
- Journal
- J. Electrochem. Soc.
- Status
- published
- Vol
- 167
- Page
- 080537
- Year
- 2020
- Link
- http://doi.org/10.1149/1945-7111/ab9188 751회 연결
Herein, nanopore-embedded CoMn2O4 microspheres were successfully synthesized, and their electrochemical behavior as an anode for lithium-ion batteries (LIBs) and as a catalyst for oxygen-reduction/evolution reactions of lithium-air batteries (LABs) cathodes was investigated. The electrodes composed of specifically designed particles exhibited enhanced capacity retention with stable charge-transfer impedance change during the overall lithium conversion reactions as compared to the electrodes composed of conventional particulate nanoparticles. The LAB cathodes with the as-prepared porous compounds exhibit better reversibility with a ∼10% higher oxygen-evolution reactions efficiency and stable capacity retention than those of the Ketjen black-only electrodes. We believe that these novel performance is achieved due to the rational design of the pore-embedded/interconnected CoMn2O4 nanoparticles, which mitigate the detrimental volume change during the repetitive Li+ LiOx reaction and facilitate effective lithium ion (for LIBs) and oxygen diffusion (for LABs) in the porous electrode.