Abstract
Olivine-structured LiMnPO 4 with uniform cluster-like and rod-like morphologies have been synthesized via a simple solvothermal process in water–organic solvent mixtures. The cluster-like LiMnPO 4 microstructures are composed of numerous nanoplates in thickness of ca. 35 nm and width of ca. 400 nm. Carbon is coated on the LiMnPO 4 surfaces by chemical vapor deposition (CVD) from methylbenzene and ball milling with acetylene black, respectively. The hierarchical LiMnPO 4 nanoplates deliver much higher discharge capacity and rate capability than the nanorods due to the larger interfacial area for electrochemical reaction and shorter lithium ion diffusion depth. Furthermore, carbon-coating via CVD approach leads to a significant improvement in the electrochemical performances compared to the ball milling process.
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