离子液体对硫-超导炭黑复合材料电化学性能的影响

以热处理方法由单质硫与超导炭黑制备硫含量为59%的硫-超导炭黑复合材料.X射线衍射、扫描电镜测试表明,单质硫均匀地分散在高比表面积的超导炭黑中.如于电解液中添加室温离子液体,则可有效减弱复合材料中多硫化物在电解液的穿梭效应,提高硫复合材料的电化学性能.充放电测试表明,该硫-超导炭黑复合材料在含有离子液体的电解液中循环50周后,容量仍保持483.6mAh/g.

Performance of Sulfur-Super Conductive Carbon Black Composite in Electrolyte Mixed with Room Temperature Ionic Liquid

The sulfur-super conductive carbon black composite was prepared as cathode material of lithium/sulfur battery.The composite was characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),and electrochemical impedance spectroscopy(EIS).The sulfur composite shows a high discharge capacity and a good cycle performance in electrolyte mixed with 50% of room temperature ionic liquid.In particular,the discharge capacity of the composite was stabilized at 483.6 mAh/g after 50 cycles.