Mn3O4@C core–shell composites as an improved anode for advanced lithium ion batteries

摘要: Rationally designed nanocomposites with effective surface modification are important to improve the electrochemical performance of Li-ion batteries. Carbon coatings as an economical and practically feasible approach, which would provide good conductivity promote diffusion, leading improved performance. Mn3O4@C core–shell nanorods were prepared using synchronous reduction decomposition acetylene. The resulting possess a one dimensional shape, porous structure uniform carbon layer (∼3 nm), result in stability. When tested anodes, they deliver specific capacity 765 mA h g−1 after 100 cycles at current density 500 g−1, is considerably higher than pure Mn3O4 nanorods. Even 2 A can maintain 380 g−1. Their excellent lithium storage be ascribed coating well their unique structure.