A new double layer super-capacitor made by free-standing activated carbon membranes and highly concentrated potassium acetate solutions
| Autor: | Roberto Lorenzi, M. Tribbia, Riccardo Ruffo, Gabriele Brugnetti, N. Pianta |
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| Přispěvatelé: | Tribbia, M, Pianta, N, Brugnetti, G, Lorenzi, R, Ruffo, R |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Chemical Engineering Potassium Activated carbon chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry Electrochemistry 01 natural sciences Potassium acetate medicine Supercapacitor Water in salt electrolyte Aqueous solution 021001 nanoscience & nanotechnology 0104 chemical sciences Chemical engineering chemistry Gravimetric analysis 0210 nano-technology Carbon medicine.drug Electrochemical double layer capacitor |
| Popis: | Water in salt solutions are a new class of electrolytes developed with the aim of increasing the electrochemical stability of aqueous electrolytes without decreasing the transport properties. Among them, aqueous solutions of potassium acetate (CH3COOK, AcK) have received little attention, despite its large solubility in water at room temperature (25 mol kg−1) and the very low cost. With the idea of developing cost-effective and good performing Electrochemical Double Layer Capacitors (EDLCs), a symmetric device based on a low-cost coal derived carbon (F400) and highly concentrated AcK solutions as electrodes and electrolytes, respectively, was fabricated and optimized. The best results are obtained with the system F400/20 mol kg−1 AcK/F400 able to deliver a gravimetric energy density of 26 Wh kg−1 at an average power of 1.4 kW kg−1. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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