Unravel the influences of Ni substitution on Co-based electrodes for rechargeable alkaline Zn–Co batteries

This study aims at improving the electrochemical performance of the battery via substituting Ni on the Co3O4 electrode. A novel multiple self-assembled nanowire-nanosheet structure is constructed. More importantly, the capacity decay mechanism is proposed as the decreased low valence species, microstructure collapse, and irreversible phase transition with an increase of the Ni substitution ratio.

November 2020