A novel rechargeable zinc–copper battery without a separator
| Autor: | Ali Khazaeli, Dominik P. J. Barz, Sreemannarayana Mypati |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Battery (electricity)
Materials science Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Zinc Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 7. Clean energy Copper Energy storage 0104 chemical sciences chemistry Chemical engineering Self-healing hydrogels Electrode Electrical and Electronic Engineering 0210 nano-technology Separator (electricity) |
| Zdroj: | Journal of Energy Storage. 42:103109 |
| ISSN: | 2352-152X |
| Popis: | Rechargeable zinc–copper batteries attract considerable interest due to their relatively-high theoretical energy density, low cost, and inherent safety. However, their practical applications are restricted by different factors, such as the need of a separator preventing copper ion crossover or zinc dendrite growth. In this work, a novel rechargeable zinc–copper battery concept is proposed where the electrolytes are made from hydrogels. One hydrogel is formulated such that it coordinates the copper ions but allows for unhindered transfer of sodium ions which are exchanged between the electrodes to maintain electro-neutrality. Hence, the battery does not need a separator but still can be repeatedly charged and discharged. Testing of the separator-less battery shows a maximum specific capacity of 280 mAh g−1 at a current density of 1 mA cm − 2 . Characterization of the battery components after 100 charge–discharge cycles reveals that there is no dendrite growth and the hydrogels inhibit copper ion crossover due to the coordination in the gel matrix. The battery can be easily bend indicating the potential as a flexible energy storage system. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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