锂/硫电池用含硫聚磷腈正极材料

Sulfur-containing polyphosphazene as cathode material for Li/S battery

采用亲核取代的方法制备了含硫聚磷腈正极材料，并与金属锂组装成扣式电池。傅里叶变换红外（FTIR）光谱证明，材料中存在S-S键；恒流充放电测试表明：当电流为60mA／g时，含硫聚磷腈正极材料的初始放电比容量为754．5mAh／g，第30～50次循环的放电比容量稳定在120～100mAh／g；循环伏安测试表明：材料具有2．6V的阳极峰和2．4V、2．0V及1．0V的阴极峰。

Cathode material sulfur-containing polyphosphazene was synthesized by the methods of nucleophilic substitution and button ceils were assembled with metal lithium. Fourier transform infrared（FTIR） spectroscopy proved that S--S bond was existed in the material. Galvanostatic charge/discharge test showed that the initial specific discharge capacity of the sulfur-containing polyphosphazene was 754.SmAh/g at the current of 60 mA/g, the discharge specific capacity stab/lized at 120 - 100 mAh/g in the 30 - 50th cycle. Cyclic voltammetry test showed the material had an anodic peak at 2,6V and cathodic peaks at 2.4 V,2.0 V and 1.0V.