Excellent oxygen evolution reaction of NiO with a layered nanosphere structure as the cathode of lithium-oxygen batteries.

ABSTRACT: A layered nanosphere structured NiO catalyst was successfully synthesized by a simple and efficient hydrothermal method as a cathode material for lithium-oxygen (Li-O₂) batteries. Cyclic voltammetry (CV), dual electrode voltammetry (DECV) and chronoamperometry (CA) by rotating ring-disk electrode (RRDE) were carried out to investigate the catalytic activity of this catalyst for the oxygen evolution reaction (OER). The results revealed that the layered nanosphere NiO exhibited excellent electrochemical performance, stability and a typical four-electron reaction as a cathode electrocatalyst for rechargeable nonaqueous Li-O₂ batteries. The overpotential of the NiO is only up to 0.61 V. X-ray photoelectron spectroscopy (XPS) characterization shows that the Li₂O

SUBMITTER: Dong H 

PROVIDER: S-EPMC9077675 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature