In situ construction of one-dimensional porous MnO@C nanorods for electrode materials

Abstract

Owing to cost-effectiveness, low conversion potential, and high theoretical capacity (756 mA h g⁻¹), MnO has been a potential candidate for LIB anode. Herein, a facile carbon modification route to prepare MnO@C nanorods with excellent capacity and long lifespan for LIB anode is presented, using MnOOH as a precursor after being annealed in Ar/C₂H₂ atmosphere. Notably, MnO@C displayed a superior capacity of 451 mA h g⁻¹ after 300 cycles at 2 A g⁻¹. The discharge capacity at 5 A g⁻¹ was 261 mA h g⁻¹. We found that the improved performance of MnO@C can contribute to the porous structure and the protection of carbon shell, which are confirmed by kinetic analysis and pseudocapacitance analysis.