| Nomenclature | |
| A | Ampere |
| As | surface area |
| C | capacitor |
| Cdl | double layer capacitance |
| ci | ionic concentration of electrolyte |
| CT | total capacitance |
| CW | Warburg capacitance |
| DS | diffusion coefficient |
| E | energy |
| ECM | equivalent circuit model |
| EDLC | electrochemical double layer capacitor |
| EIS | electrochemical impedance spectroscopy |
| F | Farads |
| Fc | Faraday’s constant |
| g | gram |
| G | external circuit |
| i | current |
| id | current density |
| io | exchange current |
| k | kilo |
| K | Kelvin |
| l | electrode active layer thickness |
| ls | separator thickness |
| L | inductor |
| LIB | lithium-ion battery |
| LIC | lithium-ion capacitor |
| m | milli |
| M | noles |
| ne | number of electrons per ion |
| P | power |
| r | particle radius |
| R | resistor |
| Ru | universal gas constant |
| Rct | charge transfer resistance |
| Rs | series resistance |
| RW | Warburg impedance |