Kinetics and Electrochemical Studies of Fe-substituted LiMnPO4

A simple sol-gel method was applied to synthesize LiMn(1-x)FexPO4 (x=0-0.5). The kinetics of LiMn(1-x)FexPO4 was studied by chemical delithiation experiment and EIS measurements. The results showed that the LiMn0.6Fe0.4PO4 has the fastest conversion rate from LiMn(1-x)FexPO4 to Mn(1-x)FexPO4 which might be related to the best rate capability among all these samples. The electrochemical tests showed that the discharge capacity for it is about 130 mAhg-1, 100 mAhg-1, 80 mAhg-1and 60 mAhg-1 at 0.1 C, 0.5 C, 1 C, and 2 C respectively.