Three-dimensional rigidity-reinforced SiOx anodes with stabilized performance using an aqueous multicomponent binder technology

Three-dimensional (3D) rigidity-reinforced SiOx anodes are prepared by using the aqueous multicomponent binders to stabilize the performances of lithium-ion batteries (LIBs). Considering an elastic skeleton, adhesiveness, electrolyte absorption, etc., four kinds of binders (polyacrylamide (PAM), polytetrafluoroethylene (PTFE), carboxymethyl cellulose (CMC), and styrene butadiene rubber (SBR)) are selected to prepare aqueous multicomponent binders. The SiOx anodes with binder PAM/SBR/PTFE (PSP) exhibit 3D rigidity-reinforced structure, larger adhesive force and moderate electrolyte adsorption capacity compared to other anodes with single and multicomponent binders. Specifically, the electrochemical performances of the SiOx anodes with binder PSP663 are stabilized, and a retention capacity of 770 mAh g-1 at 500 mA g-1 after 300 cycles and a rate capacity of 993 mAh g-1 at 1200 mA g-1 are obtained. The enhanced performances are attributed to the good chemical stability of PTFE to protect SiOx particles from ...