Abstract
Aqueous-based LiFePO 4 particulates were investigated with respect to their use in fabrication of lithium-ion battery cathode as a function of degree of substitution (DS) on carboxymethyl cellulose (CMC). The dispersion properties of LiFePO 4 particulates were characterized using electroacoustic measurements, rheology, and microstructural observations at two different DS values on CMC. It was found that the LiFePO 4 suspensions with lower DS had better long-term dispersing efficiency and more compact microstructure than those with higher DS. Furthermore, the electrodes with lower DS (141 mAh) exhibited a better electrochemical cycling performance than those with higher DS (134 mAh) after the same number of cycles.
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