Nonaqueous synthesis of nano-sized LiMnPO4@C as a cathode material for high performance lithium ion batteries

A nano-sized LiMnPO4@C core@shell structure was prepared through a facile two-step method. Oleylamine was introduced in the synthesis process using as both solvent and carbon source. The LiMnPO4@C structure has a particle size smaller than 40 nm with uniform 2–3 nm carbon coating layers, which interweave to form a secondary micrometer-sized mesoporous structure. The as-prepared LiMnPO4@C showed a high capacity of 168 mAh g−1 at 0.1 C and 105 mAh g−1 at 5 C applied as a cathode electrode for lithium ion batteries. The thin layer carbon coating not only increases LiMnPO4 in electronic and ionic conductivity, but also enhances its cycling ability by stabilizing the solid electrolyte interface.

Graphical abstractA hierarchical nano-sized and uniform carbon coated LiMnPO4@C was fabricated via an oleylamine-mediated method, which showed excellent electrochemical performance.Figure optionsDownload full-size imageDownload as PowerPoint slide