Effect of particle size on LiMnPO4 cathodes
Effect of particle size on LiMnPO4 cathodes
复制标题
DOI：
10.1016/j.jpowsour.2007.06.203
复制
发表时间：
2007-12-06
影响因子：
9.2
通讯作者：
Exnar, Ivan
中科院分区：
文献类型：
--
作者：
Drezen, Thierry;Kwon, Nam-Hee;Exnar, Ivan
采用溶胶-凝胶法合成了LiMnPO 4，并作为锂离子电池正极材料进行了测试。在520至600 ℃的温度下煅烧后，获得140-220 nm范围内的初级粒度。随后的干球磨将初级颗粒直径从130 nm减小到90 nm，这取决于球磨的时间。在C/100和134 mAh g（-1）在C/10的可逆容量的测量。分别为理论值的92%和79%，这是该材料迄今为止报告的最高值。在更快的充电速率下，发现当使用较小的LiMnPO 4颗粒时，电化学性能得到改善。(c)2007 Elsevier B. V.保留所有权利。
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.