Table 4.
Summary of characteristics and electrochemical performance of polymer-coated separators
| Separator | Coating thickness (μm) | Porositya | Electrolyte contact angle | Electrolyte uptake | Ionic conductivity (mS cm–1) at RT | Cyclic performance | References |
|---|---|---|---|---|---|---|---|
| PE/PVDF-HFP | –b | – | – | 140% | 0.44 | – | [103] |
| PE/PMMA | 2 ~ 3 | – | – | 200% | 0.52 | – | [107] |
| PE/PDA | – | – | 39° | 126% | 0.41 | – | [27] |
| PE/EC | 2 ~ 3 | – | – | – | 0.68 | – | [108] |
| PE/AN-co-MMA | – | – | – | 150% | 2.06 | 83.0% after 50 cycles at 0.2C (original) 86.3% after 50 cycles at 0.2C (modified) | [109] |
| PP/PDA | – | – | < 20° (water) | 290% | 1.30 | 94.2% after 100 cycles at 0.2C | [110] |
| Cellulose/PVDF-HFP | – | 65% | 55° | 280% | 1.04 | 71.0% after 100 cycles at 0.5C (PP) 83.0% after 100 cycles at 0.5C (modified) | [111] |
| PE/PDA | – | – | 39° | 112% | 0.30 | 94.9% after 100 cycles at 0.5C | [40] |
| PE/PEO | – | – | – | 76% | 1.00 | – | [105] |
| PP/PI | 8.16 | 53.05% | 5° | 208% | 0.34 | 75.4% after 200 cycles at 1C (original) 80.1% after 200 cycles at 1C (modified) | [112] |
| PE/PBI | 4 | 54% | 10° | 225% | 0.60 | 93.9% after 100 cycles at 0.5C (original) 97.7% after 100 cycles at 0.5C (modified) | [113] |
| PE/PI | – | 60% | 0° | 400% | 1.34 | 96.4% after 100 cycles at 1C | [114] |
| PVDF/PMIA | – | 83.97% | – | – | 0.81 | 84.3% after 100 cycles at 0.2C 93.1% after 100 cycles at 0.2C | [115] |
| PEEK/PMMA | – | 64.1% | 0° | 173% | 1.03 | – | [116] |
a “Porosity” is the entire separator’s, instead of the coating’s. b “–” means not mentioned