Table 2. Specific conditions and results for the capacitors using saturated aqueous solutions of various metal perchlorate as electrolyte.
| Electrolyte | Separator | Operation Voltage (V) | Current density (mA cm−2) | Energy density (W h kg−1) | Power density (W kg−1) |
|---|---|---|---|---|---|
| LiClO4 | CEM | 3.2 | 10 | 0.42 | 138 |
| Mg(ClO4)2 | CEM | 3.0 | 40 | 1.2 | 472 |
| Ca(ClO4)2 | MF | 3.0 | 15 | 0.85 | 200 |
| Ba(ClO4)2 | MF | 3.0 | 15 | 0.64 | 209 |
| Al(ClO4)3 | FP | 2.8 | 20 | 0.81 | 172 |
Graphite mixture (GA) was used in both negative and positive electrodes. CEM: Cation exchange membrane; MF: Membrane filter; FP: Paper filter.