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dc.contributor.author | Lindberg, Simon![]() |
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dc.contributor.author | Ndiaye, Ndeye Maty![]() |
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dc.contributor.author | Manyala, Ncholu I.![]() |
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dc.contributor.author | Johansson, Patrik![]() |
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dc.contributor.author | Matic, Aleksandar![]() |
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dc.date.accessioned | 2020-09-26T10:56:53Z | |
dc.date.available | 2020-09-26T10:56:53Z | |
dc.date.issued | 2020-06 | |
dc.description.abstract | In this work we demonstrate the application of a highly concentrated aqueous electrolyte to a hybrid supercapacitor cell. We combine an 8 m Sodium bis(trifluoromethanesulfonyl)imide (NaTFSI) aqueous electrolyte with a nanostructured VO2-cathode to enhance the voltage widow up to 2.4 V in a full cell. With the enhanced potential window, we are able to exploit the full contribution of the VO2 material, where a part is outside the stability window of standard alkaline aqueous electrolytes. We show that the VO2 material in the highly concentrated electrolyte provides a faradaic contribution even at the highest current density (25 A/g) and in this way increases the energy content also in high power conditions. The full cell shows a good efficiency but also a capacity fade over 500 cycles (39%) which is most likely related to dissolution of VO2. | en_ZA |
dc.description.department | Physics | en_ZA |
dc.description.librarian | hj2020 | en_ZA |
dc.description.sponsorship | The Swedish Energy Agency “Batterifonden” grant | en_ZA |
dc.description.uri | http://www.elsevier.com/locate/electacta | en_ZA |
dc.identifier.citation | Lindberg, S., Ndiaye, N.M., Manyala, N. et al. 2020, 'A VO2 based hybrid super-capacitor utilizing a highly concentrated aqueous electrolyte for increased potential window and capacity', Electrochimica Acta, vol. 345, art. 136225, pp. 1-6. | en_ZA |
dc.identifier.issn | 0013-4686 (print) | |
dc.identifier.issn | 1873-3859 (online) | |
dc.identifier.other | 10.1016/j.electacta.2020.136225 | |
dc.identifier.uri | http://hdl.handle.net/2263/76229 | |
dc.language.iso | en | en_ZA |
dc.publisher | Elsevier | en_ZA |
dc.rights | © 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). | en_ZA |
dc.subject | Highly concentrated electrolyte | en_ZA |
dc.subject | Supercapacitor | en_ZA |
dc.subject | Stability | en_ZA |
dc.subject | NaTFSI | en_ZA |
dc.subject | VO2 | en_ZA |
dc.title | A VO2 based hybrid super-capacitor utilizing a highly concentrated aqueous electrolyte for increased potential window and capacity | en_ZA |
dc.type | Article | en_ZA |