Effects of PAA-NH[sub 4] Addition on the Dispersion Property of Aqueous LiCoO[sub 2] Slurries and the Cell Performance of As-Prepared LiCoO[sub 2] Cathodes

Abstract

The dispersion property of aqueous lithium cobalt oxide slurries and the corresponding cell performance of electrodes with and without dispersant additions were investigated. The influence of dispersant, ammonium polyacrylic acid , and polyacrylic latex binder (LA132) on the dispersion behaviors of in aqueous suspensions is characterized by zeta potential and rheology measurements. The results show that the can adsorb onto the powder to provide an electrosteric stabilization in aqueous suspensions, but LA132 does not show such function. For the as-prepared electrode without addition, the powder agglomerates and the binder accumulates around the powder. This unfavorable phenomenon can be diminished by increasing content. However, it is found that too much addition of is detrimental to the electrochemical properties of . To simultaneously obtain a well-dispersed and a electrode with a better electrochemical property, the appropriate amount of is about based upon weight.