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- Publisher Website: 10.1016/j.electacta.2019.07.037
- Scopus: eid_2-s2.0-85069855246
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Article: Exploring the ionic interfaces of three-electrolyte pH differential power sources
Title | Exploring the ionic interfaces of three-electrolyte pH differential power sources |
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Authors | |
Keywords | Energy storage Cation-exchange membrane Anion-exchange membrane Rechargeable battery Flow battery |
Issue Date | 2019 |
Publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/electacta |
Citation | Electrochimica Acta, 2019, v. 320, p. article no. 134526 How to Cite? |
Abstract | Three-electrolyte configuration with two oppositely charged ion-exchange membranes can be used to yield various promising pH differential power sources. pH change, ion transport and potential profiles across the membranes and electrode/electrolyte interfaces of a three-electrolyte pH differential lead dioxide-metal hydride system are therefore systematically investigated for the first time. We find that i) pH changes of the acid and alkaline chambers are dependent on the combined effect of the electrode reaction and the ion transport. In addition, the pH change of the middle chamber is also affected by the crossover of protons from acid chamber if the anion-exchange membrane has a low permselectivity; ii) the electrical potential gradient mainly controls the ion transport with current flows; iii) the high overall cell voltage is attributed to the large pHacid-alkaline, while the potential across the membranes and electrode/electrolyte interfaces is affected by both pH and the concentration gradient. Key issues and proposed solutions are discussed to improve the electrochemical performance of this three-electrolyte pH differential electrochemical system. This work offers new opportunities to develop promising energy storage technologies. |
Persistent Identifier | http://hdl.handle.net/10722/289658 |
ISSN | 2023 Impact Factor: 5.5 2023 SCImago Journal Rankings: 1.159 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Weng, GM | - |
dc.contributor.author | Li, CY | - |
dc.contributor.author | Chan, KY | - |
dc.date.accessioned | 2020-10-22T08:15:39Z | - |
dc.date.available | 2020-10-22T08:15:39Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Electrochimica Acta, 2019, v. 320, p. article no. 134526 | - |
dc.identifier.issn | 0013-4686 | - |
dc.identifier.uri | http://hdl.handle.net/10722/289658 | - |
dc.description.abstract | Three-electrolyte configuration with two oppositely charged ion-exchange membranes can be used to yield various promising pH differential power sources. pH change, ion transport and potential profiles across the membranes and electrode/electrolyte interfaces of a three-electrolyte pH differential lead dioxide-metal hydride system are therefore systematically investigated for the first time. We find that i) pH changes of the acid and alkaline chambers are dependent on the combined effect of the electrode reaction and the ion transport. In addition, the pH change of the middle chamber is also affected by the crossover of protons from acid chamber if the anion-exchange membrane has a low permselectivity; ii) the electrical potential gradient mainly controls the ion transport with current flows; iii) the high overall cell voltage is attributed to the large pHacid-alkaline, while the potential across the membranes and electrode/electrolyte interfaces is affected by both pH and the concentration gradient. Key issues and proposed solutions are discussed to improve the electrochemical performance of this three-electrolyte pH differential electrochemical system. This work offers new opportunities to develop promising energy storage technologies. | - |
dc.language | eng | - |
dc.publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/electacta | - |
dc.relation.ispartof | Electrochimica Acta | - |
dc.subject | Energy storage | - |
dc.subject | Cation-exchange membrane | - |
dc.subject | Anion-exchange membrane | - |
dc.subject | Rechargeable battery | - |
dc.subject | Flow battery | - |
dc.title | Exploring the ionic interfaces of three-electrolyte pH differential power sources | - |
dc.type | Article | - |
dc.identifier.email | Li, CY: cyvli@hku.hk | - |
dc.identifier.email | Chan, KY: hrsccky@hku.hk | - |
dc.identifier.authority | Li, CY=rp02122 | - |
dc.identifier.authority | Chan, KY=rp00662 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.electacta.2019.07.037 | - |
dc.identifier.scopus | eid_2-s2.0-85069855246 | - |
dc.identifier.hkuros | 317572 | - |
dc.identifier.volume | 320 | - |
dc.identifier.spage | article no. 134526 | - |
dc.identifier.epage | article no. 134526 | - |
dc.identifier.isi | WOS:000483341100004 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.issnl | 0013-4686 | - |