LiMnPO4 nanosquares with the edge size of 800-1000 nm and the thickness of 50-250 nin were hydrothermally prepared using 1.0 g of Na4P2O7 center dot 10H(2)O. Subsequently, the LiMnPO4 nanosquares were annealed with ascorbic acid (Vc) at 600 degrees C to prepare the LiMnPO4/C nanocomposites. The electrochemical performances of LiMnPO4 and LiMnPO4/C at 0.1 C demonstrated first run discharge capacities at 81.6 and 125.5 mA h g(-1), respectively. In addition, spindles, bows, and cubes composed of LiMnPO4 nanosquares have also been prepared.