Electrochemical performance of nanocomposite LiMnPO4/C cathode materials for lithium batteries

A LiMnPO4/C composite cathode was prepared by a combination of spray pyrolysis and wet ball milling. The cathode showed stable performance at various cutoff voltages up to 4.9 V. The cutoff voltage increase up to 4.9 V allowed the achievement of a high discharge capacity in galvanostatic charge-discharge tests. The discharge capacities of 153 mAh g(-1) at 0.05 C and 149 mAh g(-1) at 0.1 C were achieved at room temperature; the trickle-mode discharge capacities at room temperature were 132, 120 and 91 mAh g(-1) at 0.1, 1 and 5 C discharge rates, respectively. The cell exhibited a good rate capability in the galvanostatic cycling up to 5 C discharge rates at both ambient temperature and 50 degrees C. (C) 2009 Elsevier B.V. All rights reserved.