Porous ZnMnO 3 plates prepared from Zn/Mn–sucrose composite as high‐performance lithium‐ion battery anodes

Abstract

Porous ZnMnO3 plates have been prepared by an initial formation of Zn/Mn–sucrose composite and subsequent calcination route. The influences of calcination temperatures on the structures and electrochemical performances of target ZnMnO3 are clearly studied. At an optimal calcination temperature of 500°C, the ZnMnO3 composed of numerous nanoparticles possesses an obvious plate-like structure and porous property, and a Brunauer–Emmett–Teller specific surface area of ∼25.50 m2 g−1 and average pore size of ∼19.69 nm can be reached. As lithium-ion battery anode, the optimal ZnMnO3 delivers a reversible (second) discharge capacity of 709.6 mAh g−1 at 0.4 A g−1. After 100 cycles, a discharge capacity of 560.0 mAh g−1 can be retained. Even at a high current density of 1.2 A g−1, the sample still shows a discharge capacity of 403.1 mAh g−1. The good electrochemical performance of as-prepared ZnMnO3 may be attributed to its unique porous structure.