화학공학소재연구정보센터
Journal of Power Sources, Vol.412, 670-676, 2019
Sulfurized - poly(acrylonitrile) wrapped carbon-sulfur composite cathode material for high performance rechargeable lithium-sulfur batteries
Sulfurized - poly(acrylonitrile) composite cathode materials provide high specific capacity, deprive the dissolution of polysulfides and shuttling effect. However, these materials have intrinsic problems such as low sulfur loading and poor rate capability at high C - rate due to the moderate conductivity of the composites. Here, we synthesize a wrapped S/rSP@SPAN composite using a dissolution-reprecipitation method followed by the thermal treatment. The idea is that the dissolution-reprecipitation of SP@PAN augments the surface area of the composite, which provides high sulfur loading and improves the composite - electrolyte contact, and conductivity of cathode material. As a result, the electrochemical performance of the as-fabricated S/rSP@SPAN cathode material yields excellent cyclability and high rate capability of 492 mAh g(-1) even at a high C - rate (10 degrees C) with high sulfur loading (54.5%).