Table 1.
Comparison of Different Energy Storage Devices Involving Zn-Br2 Redox Couple or Based on Bromine Chemistry
| Battery Type | Maximum Energy Density (Wh kg−1) | Maximum Power Density (W kg−1) | Coulombic Efficiency (%) | Energy Efficiency (%) | Cycling Life | Reference |
|---|---|---|---|---|---|---|
| Zn-Br2 (flow) | 135 | NA | 95 | 75 | 1,000 | (Biswas et al., 2017) |
| Zn-Br2 (single) | NA | NA | 92 | 82 | 70 | (Lai et al., 2013) |
| Zn-Br2 (supercapattery) | 90 | 3,100 | 99 | NA | 7,000 | (Yu et al., 2020) |
| EV-Br2 hybrid supercapacitor | 64 | 3,000 | 97 | 84 | 7,000 | (Yoo et al., 2017) |
| AQDS-Br2 flow battery | 50 | NA | 95 | NA | 15 | (Huskinson et al., 2014) |
| Zn-Br2 (static) | 142 | 13,000 | 99.9 | 94 | 11,000 | This work |
For comparison, all energy densities were converted using the total weight of the positive, negative electrodes and the active material mass.