Abstract
With the widespread use of electric vehicles and smart houses, high-capacity lithium ion batteries are required increasingly. In this work, we attempted to fabricate thick-film silicon anodes for lithium-ion batteries by high-precision press sintering of waste silicon powder disposed from silicon ingot slicing processes using diamond wire saws. The waste silicon powder was mixed with polyacrylonitrile, which functions as both a binder and a conductive additive, and NaCl microcrystals as spacers to generate pores in the film. Sintering experiments were performed under high-temperature and high-pressure conditions and the properties of the resulting composite films were characterized. The feasibility of fabricating composite porous thick films for silicon anodes by press sintering was confirmed.
