Influence of polymer binder structure on the properties of the graphite anode for lithium-ion batteries

Abstract

This paper discusses the impact of the structure and properties of three different polymer binders: polyvinylidene fluoride, sodium carboxymethyl cellulose and polyvinyl alcohol, on the electrochemical properties of spherical graphite anodes for Li‐ion batteries. Electrochemical tests indicate that the nature of polyvinylidene fluoride contributes in decreasing the cycle life of graphite electrodes in contrast to effective water‐based binders. This study demonstrates the possibility of manufacturing graphite‐based electrode for Li‐ion batteries that cycle longer and use water in the processing, instead of hazardous organic solvents like N‐methylpyrrolidone, thereby improving performance, reducing cost and protecting the environment.