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Citation: WANG Guo-Ping, ZHANG Qing-Tang, QU Mei-Zhen, YU Zuo-Long. Effects of Different Kinds of Nano-Carbon Conductive Additives on the Electrochemical Character of LiCoO₂[J]. Chinese Journal of Applied Chemistry, ;2006, 23(12): 1385-1390. shu

Effects of Different Kinds of Nano-Carbon Conductive Additives on the Electrochemical Character of LiCoO₂

1.
a College of Chemical Engineering, Nanhua University, Hengyang 421001;
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b Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041

Corresponding author: WANG Guo-Ping,
Received Date: 14 December 2005
Available Online: 28 April 2006

After comparing the effects of three kinds of nano-carbon materials,namely,carbon nanotubes(CNTs),carbon black and chemical vapor deposit carbon fibers on the LiCoO₂ cathode,the results indicate that the kind of nano-carbon conductive additives plays an important role in the electrochemical behavior of the cathode.Spherical carbon black prevent the formation of conductive network and therefore leads to a serious polarization.In contrast,wire-like conductive additives,especially CNTs,exhibit better electrontransfer ability,forms better conductive network in the cathode and hence alleviate the degree of cathode polarization owing to their high crystallinity,well ordered one-dimensional and cylindrical structure.Much amount of conductive additives and binder could be saved by utilizing CNTs, and the cathode with only 3% of conductive additive CNTs shows excellent rate capacity.At the discharge rate of 2.0C,the LiCoO₂ cathode with CNTs still holds 95% of the discharge capacity shown at the discharge rate of 0.5C.
- carbon nanotube,
- lithium ion battery,
- cathode,
- rate capacity,
- conductive additive
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Effects of Different Kinds of Nano-Carbon Conductive Additives on the Electrochemical Character of LiCoO2

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通讯作者: 陈斌, bchen63@163.com

Effects of Different Kinds of Nano-Carbon Conductive Additives on the Electrochemical Character of LiCoO₂