You don't have to use it at the same time. According to the relevant public information, it is not necessary to use styrene-butadiene latex and cmc at the same time in lithium batteries, and the best effect can be achieved by using them at the same time. Styrene-butadiene latex is used to enhance the adhesion and mechanical strength of cathode materials, while cmc is used to improve the viscosity and viscosity of electrolyte to prevent liquid flow during electrochemical reaction of batteries.