Physical and electrochemical properties of LiMnPO4/C composite cathode prepared with different conductive carbons
Physical and electrochemical properties of LiMnPO4/C composite cathode prepared with different conductive carbons
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DOI：
10.1016/j.jpowsour.2010.05.023
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发表时间：
2010-11-01
影响因子：
9.2
通讯作者：
Taniguchi, Izumi
中科院分区：
文献类型：
--
作者：
Bakenov, Zhumabay;Taniguchi, Izumi
以乙炔黑和科琴黑两种导电炭为原料，采用喷雾热解法和湿法球磨相结合的方法制备了橄榄石结构的LiMnPO 4/C复合材料。与其他导电炭相比，具有较大比表面积和邻苯二甲酸二丁酯吸收值的科琴黑更好。与其他LiMnPO 4/C复合材料相比，添加科琴黑的LiMnPO 4/C复合材料具有最大的比表面积，放电容量最大。在0.05C下，该复合阴极的最大放电容量为166 mAh·g（-1）.这是LiMnPO 4理论值的约97%。使用这种导电碳的性能改善归因于其极大的比表面积和高的吸收电解质的能力，这在复合阴极结构中提供了增强的电荷转移和锂离子传输。(C)2010爱思唯尔有限公司版权所有。
The olivine structured LiMnPO4/C composites were prepared by a combination of spray pyrolysis and wet ballmilling using different conductive carbons: acetylene black and two types of ketjen black. The ketjen black with a larger specific surface area and dibutyl phthalate absorption number was found to be more preferable compared with other conductive carbons studied in this work. The LiMnPO4/C composite cathode with ketjen black, which has the largest specific surface area, exhibited the largest discharge capacity compared with other LiMnPO4/C composites. The largest discharge capacity delivered by this composite cathode was 166 mAh g(-1) at 0.05 C. which is about 97% of the theoretical value for LiMnPO4. The performance improvement by using this conductive carbon was attributed to its extremely large specific surface area and high ability to absorb the electrolyte, which provide enhanced charge transfer and lithium ion transport in the composite cathode structure. (C) 2010 Elsevier B.V. All rights reserved.