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2 NiS2@C正极材料的等效电路参数

Table 2 Equivalent circuit parameters of NiS2@C cathode materials

Sample CPE1/F CPE2/F CPE3/F R2/Ω·cm2 R3/Ω·cm2 IF/mA·cm-2 NiS2@C initial 5.14×10-5 1.06×10-4 - 392.30 283.00 1.08×10-5 5th cycle 4.07×10-5 9.16×10-4 7.75×10-5 108.90 128.10 3.90×10-5 10th cycle 3.78×10-5 7.96×10-5 5.44×10-5 11.04 75.70 3.85×10-4 20th cycle 1.40×10-5 6.13×10-5 2.40×10-5 6.79 71.21 6.26×10-4 50th cycle 1.26×10-5 2.42×10-5 1.71×10-5 5.43 3.50 7.82×10-4