Specific Electrolyte for Supercapacitor {3 V, -40℃~65℃}, 200 g/bottle, CSCSEDL3702
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Designing a supercapacitor (Electric Double-Layer Capacitor, EDLC) capable of a 3.0 V operating window across an extreme temperature range of -40 ℃ to +65 ℃ requires moving away from standard acetonitrile (which struggles with high-temperature vapor pressure/safety at 65℃) and pure ionic liquids (which freeze or suffer massive viscosity spikes at -40 ℃).The optimal strategy involves a co-solvent organic formulation or a solvent-plasticized ionic liquid engineered to maintain high ionic conductivity at sub-zero temperatures while resisting oxidative decomposition at 3.0 V and +65 ℃.
The recommended electrolyte recipe are shown below: (1) Salt Framework: 1.0 M Tetraethylammonium tetrafluoroborate (TEABF4) or 1.0 M Triethylmethylammonium spiro-bis(pyrrolidinium) tetrafluoroborate ({TEMABF4). TEABF4 is the industry standard for high-voltage carbon-based supercapacitors. It offers exceptional electrochemical stability up to and beyond 3.0 V when paired with high-surface-area activated carbon electrodes, alongside high thermal decomposition thresholds. (2) Solvent Architecture: (i) Core Solvents: Propylene Carbonate (PC) / Acetonitrile (AN) mixed at a volumetric ratio of PC : AN = 3 : 7 to 4 : 6 by volume. Pure acetonitrile provides the ultra-low viscosity and high conductivity required to reach -40 ℃ without freezing, but it has a high vapor pressure at 65 ℃. Pure propylene carbonate extends the high-temperature safety and boiling point, but is too viscous at -40 ℃. Blending them creates a synergistic medium that suppresses freezing points, maintains low Equivalent Series Resistance (ESR) at -40 ℃, and remains stable against gas generation or boiling at +65℃ under a 3.0 V load.
| Part Number |
CSCSEDL3702 (C-SC-SE-DL3702) |
| Appearance |
Colorless Liquid |
| Electrolyte Composition |
Undisclosed recipe from leading manufacturer that has been well demonstrated in pilot-scale supercapacitor project. |
| Humidity Level |
<20 ppm |
| Acid Level |
<100 ppm |
| Performance |
3 V, -40℃~65℃ |
| Package Size | 200 g/bottle |
Notes: Please store the specific supercapacitor electrolyte in the glovebox due to its sensitivity to humidity.
References:
- Moumita Saha, et al. A Comprehensive Review of Novel Emerging Electrolytes for Supercapacitors: Aqueous and Organic Electrolytes Versus Ionic Liquid-Based Electrolytes, Energy Fuels (2024) 38 (10): 8528–8552.
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X. Tian, et al. “Water-in-Salt” Electrolytes for Supercapacitors: A Review, ChemSusChem, 2021, 14, 2501-2515