作为钠硫电池正极的碳约束NiS2纳米结构中钠离子的储运特性

周抒予,靳晓哲,刘佳,田瑞雪,吴爱民,黄昊

Storage and Transport Properties of Sodium-ions of Carbon-constraint NiS2 Nanostructure as Cathode for Na-S Batteries

Shuyu ZHOU,Xiaozhe JIN,jia LIU,Ruixue TIAN,Aimin WU,Hao HUANG

表1 NiS2正极材料的等效电路参数

Table 1 Equivalent circuit parameters of NiS2 cathode materials

Sample CPE1/F CPE2/F R2/Ω·cm2 R3/Ω·cm2 IF/mA·cm-2 NiS2 initial 4.34×10-5 -- 189.50 -- 2.24×10-5 1st cycle 7.41×10-4 9.18×10-5 67.04 7.31 6.34×10-5 3rd cycle 8.51×10-5 4.71×10-5 39.92 7.19 1.06×10-4 5th cycle 7.59×10-5 3.43×10-5 24.38 7.03 1.74×10-4 10th cycle 5.05×10-5 2.79×10-5 23.15 6.22 1.84×10-4