A hierarchical NiCo2O4 spinel nanowire array as an electrocatalyst for rechargeable Li–air batteries

Abstract

Hierarchical NiCo₂O₄ spinel nanowire array (H-NCO-NWA) electrocatalysts have been prepared through a facile template-free co-precipitation route. The as-prepared H-NCO-NWA exhibits a mesoporous (ca. 8 nm) structure and a high specific surface area of 124 m² g⁻¹. The assembled Li–air batteries presented lower overpotentials, reasonable specific capacity, and enhanced cyclability.