Table 2.
The Csc values at different scan rates and current densities were calculated by CV and GCD test, respectively, and EIS analysis of the pristine C12A7 and all C12A7_GO electrodes is shown.
| Parameters | Electrodes | ||||
|---|---|---|---|---|---|
| C12A7 | C12A7_GO-1 | C12A7_GO-2 | C12A7_GO-3 | C12A7_GO-4 | |
| Csc (F g−1) by CV | |||||
| 10 mV s−1 | 6.764 | 11.686 | 9.604 | 17.006 | 18.512 |
| 20 mV s−1 | 5.330 | 7.837 | 5.926 | 11.639 | 16.024 |
| 50 mV s−1 | 3.974 | 4.727 | 3.964 | 6.872 | 11.917 |
| 100 mV s−1 | 2.781 | 3.157 | 2.818 | 4.580 | 8.804 |
| 200 mV s−1 | 1.618 | 1.568 | 1.660 | 2.173 | 5.508 |
| Csc (F g−1) by GCD | |||||
| 0.2 A g−1 | 5.291 | 13.259 | 11.646 | 21.100 | 21.514 |
| 0.5 A g−1 | 2.365 | 8.742 | 7.994 | 14.911 | 17.086 |
| 1 A g−1 | 1.218 | 5.890 | 5.961 | 10.846 | 13.241 |
| 2 A g−1 | 0.728 | 3.159 | 3.271 | 6.862 | 10.226 |
| 5 A g−1 | 0.492 | 1.221 | 1.378 | 3.030 | 6.010 |
| 10 A g−1 | 0.380 | 0.664 | 0.770 | 1.631 | 3.684 |
| EIS analysis | |||||
| Rs (Ω) (%error) | 1.019 (0.542) | 0.875 (0.474) | 0.952 (1.422) | 0.869 (1.596) | 0.869 (1.657) |
| Rct (Ω) (%error) | 0.793 (5.246) | 0.474 (5.151) | 0.419 (34.204) | 0.274 (26.993) | 0.217 (30.955) |