Journal
JOURNAL OF POWER SOURCES
Volume 174, Issue 2, Pages 949-953Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2007.06.203
Keywords
LiMnPO4; sol-gel synthesis; lithium ion battery; cathode material; specific energy storage; rate capacity and particle size effects
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LiMnPO4 was synthesized using a sol-gel method and tested as a cathode material for lithium ion batteries. After calcination at temperatures between 520 and 600 degrees C, primary particle sizes in the range of 140-220 nm were achieved. Subsequent dry ball milling reduced the primary particle diameters from 130 to 90 nm, depending on time of ball milling. Reversible capacities of 156 mAh g(-1) at C/100 and 134 mAh g(-1) at C/10 were measured. At 92% and 79% of the theoretical values, respectively, these are the highest values reported to date for this material. At faster charging rates, the electrochemical performance was found to be improved when smaller LiMnPO4 particles were used. (c) 2007 Elsevier B.V. All rights reserved.
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