采用高能球磨与高温固相烧结相结合的方法成功制备了二硫化钻材料.X-射线衍射(XRD)结果表明,球磨过程中硫与钴均仍以单质存在,焙烧后制得了单相CoS(1.97)材料.恒流充放电结果显示,当导电剂含量为30%时,CoS(1.97)材料具有较好的电化学性能.在3~0.02 V和50 mA/g下,其首周吸锂容量为1 600 mAh/g,20周后容量衰减为309.6 mAh/g.
Cobalt disulfide anode materials were prepared by a novel method of high-energy ball-milling technique followed by a sintering process. X-ray diffraction (XRD) results showed that there was no new phases existed after ball milling, and a single phase COS1.97 was prepared after the followed sintering process. Galvanostatic charge-discharge test results indicated that the cobalt disulfide anode with 30% conductive addictive had the best electrochemical performance. Its initial discharge capacity reached 1 600 mAh/g at 50 mA/g in the voltage range of 3 -0. 02 V. After 20 cycles, the discharge capacity was decayed to 309.6 mAh/g.