微波法制备锂硫电池正极材料硫化镍

Synthesizing lithium sulfur battery cathode material nickel sulfide by microwave method

采用微波法制备纳米球形硫化镍(NiS),并用XRD、SEM和恒流充放电测试等方法进行分析。制备的NiS样品为纯相α-NiS,粒径均匀且没有明显的团聚。用微波反应时间为60 s的样品组装扣式电池,以0.5C在1.0～3.0 V循环的首次放电比容量为535 mAh/g,第100次循环的放电比容量为409 mAh/g,容量保持率为76%。

Nano-spherical nickel sulfide（NiS） was synthesized by microwave method. The products were analyzed by means of XRD and SEM and galvanostatic charge-discharge tests. The synthesized NiS was pure phase a-NiS, the particle size was uniform without significant agglomeration. When cycled in 1.0 - 3.0 V with 0.5 C, the initial specific discharge capacity of button cell as- sembled with the sample of 60 s microwave reaction time was 535 mAh/g, the specific discharge capacity at the 100th cycle was 409 mAh/g,the capacity retention was 76%.