Ant-Cave-Structured Nanopore-Embedded Comn2o4 Microspheres With Stable Electrochemical Reaction For Li-Air Battery

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 similar to 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+ reversible arrow LiOx reaction and facilitate effective lithium ion (for LIBs) and oxygen diffusion (for LABs) in the porous electrode. (C) 2020 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.