Hierarchical Carbon Microtube@Nanotube Core-Shell Structure for High-Performance Oxygen Electrocatalysis and Zn-Air Battery.

ABSTRACT: Zinc-air batteries (ZABs) hold tremendous promise for clean and efficient energy storage with the merits of high theoretical energy density and environmental friendliness. However, the performance of practical ZABs is still unsatisfactory because of the inevitably decreased activity of electrocatalysts when assembly into a thick electrode with high mass loading. Herein, we report a hierarchical electrocatalyst based on carbon microtube@nanotube core-shell nanostructure (CMT@CNT), which demonstrates superior electrocatalytic activity for oxygen reduction reaction and oxygen evolution reaction with a small potential gap of 0.678 V. Remarkably, when being employed as air-cathode in ZAB, the CMT@CNT presents an excellent performance with a high power density (160.6 mW cm^-2), specifi

SUBMITTER: Xie W 

PROVIDER: S-EPMC7770814 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature