Table 6 Li-ion battery impedance analysis of a-VOx films
Film | State | Rsf (Ω) | Rct (Ω) | Rb (Ω) | CPEsf (μF) | CPEdl (μF) | CPEb (μF) | Ci (mF) |
|---|---|---|---|---|---|---|---|---|
a-VOx-6 Pa | OCV | 198.1 | 415.5 | 4369 | 20.6 | 444.2 | 285.9 | 54.2 |
1.5 V | 158.4 | 451.6 | 4483 | 34.4 | 265.9 | 283.3 | 78.3 | |
4.0 V | 144.4 | 433.5 | 4838 | 45.2 | 155.0 | 272.7 | 12.2 | |
a-VOx-13 Pa | OCV | 39.6 | 16 × 10−6 | 122.3 | 8.6 | 723.6 | 388.3 | 40.6 |
1.5 V | 44.6 | 2.2 × 10−6 | 130 | 10.1 | 731.0 | 259.2 | 39.5 | |
4.0 V | 50.5 | 2.0 × 10−6 | 148.5 | 17.2 | 840.6 | 70.0 | 42.4 | |
a-VOx-30 Pa | OCV | 43.8 | 11.2 | 16.5 | 9.2 | 3 × 10−6 | 315.2 | 75.0 |
1.5 V | 76.0 | 6.6 | 43.6 | 30.7 | 1 × 10−4 | 196.5 | 149.5 | |
4.0 V | 64.8 | 15.3 | 41.0 | 4.5 | 1 × 10−3 | 47.1 | 58.3 |