Synthesis and Characterization of Lithium Manganese Phosphate by a Precipitation Method

is synthesized from a precursor precipitated via a spontaneous reaction. These nanoplates react quickly with the lithium source and form a pure phase of that has good electrochemical properties. Thermogravimetric analysis was used to determine the optimum synthesis temperature. The crystallization of occurs before . After full nucleation at , the samples exhibit a discharge capacity of (C/20 rate, 2.5–4.4 V) in the first cycle. The coulomb efficiency is maintained at near 100% after the first few cycles. When the synthesis temperature decreases to , the particle size of is further reduced to 10–50 nm with a reversible capacity of more than . For the synthesized , 73% of the initial capacity was retained at the 60th cycle. After the high rate (5C) discharge, the reversible capacity of can be recovered to nearly the original value of at the C/20 rate. This precipitation method is a cost-effective approach for manufacturing high performance cathode materials.