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Solar-rechargeable battery based on photoelectrochemical water oxidation: Solar water battery
As an alternative to the photoelectrochemical water splitting for use in the fuel cells used to generate electrical power, this study set out to develop a solar energy rechargeable battery system based on photoelectrochemical water oxidation. We refer to this design as a “solar water battery”. The s...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5024119/ https://www.ncbi.nlm.nih.gov/pubmed/27629362 http://dx.doi.org/10.1038/srep33400 |
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author | Kim, Gonu Oh, Misol Park, Yiseul |
author_facet | Kim, Gonu Oh, Misol Park, Yiseul |
author_sort | Kim, Gonu |
collection | PubMed |
description | As an alternative to the photoelectrochemical water splitting for use in the fuel cells used to generate electrical power, this study set out to develop a solar energy rechargeable battery system based on photoelectrochemical water oxidation. We refer to this design as a “solar water battery”. The solar water battery integrates a photoelectrochemical cell and battery into a single device. It uses a water oxidation reaction to simultaneously convert and store solar energy. With the solar water battery, light striking the photoelectrode causes the water to be photo-oxidized, thus charging the battery. During the discharge process, the solar water battery reduces oxygen to water with a high coulombic efficiency (>90%) and a high average output voltage (0.6 V). Because the reduction potential of oxygen is more positive [E(0) (O(2)/H(2)O) = 1.23 V vs. NHE] than common catholytes (e.g., iodide, sulfur), a high discharge voltage is produced. The solar water battery also exhibits a superior storage ability, maintaining 99% of its specific discharge capacitance after 10 h of storage, without any evidence of self-discharge. The optimization of the cell design and configuration, taking the presence of oxygen in the cell into account, was critical to achieving an efficient photocharge/discharge. |
format | Online Article Text |
id | pubmed-5024119 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-50241192016-09-20 Solar-rechargeable battery based on photoelectrochemical water oxidation: Solar water battery Kim, Gonu Oh, Misol Park, Yiseul Sci Rep Article As an alternative to the photoelectrochemical water splitting for use in the fuel cells used to generate electrical power, this study set out to develop a solar energy rechargeable battery system based on photoelectrochemical water oxidation. We refer to this design as a “solar water battery”. The solar water battery integrates a photoelectrochemical cell and battery into a single device. It uses a water oxidation reaction to simultaneously convert and store solar energy. With the solar water battery, light striking the photoelectrode causes the water to be photo-oxidized, thus charging the battery. During the discharge process, the solar water battery reduces oxygen to water with a high coulombic efficiency (>90%) and a high average output voltage (0.6 V). Because the reduction potential of oxygen is more positive [E(0) (O(2)/H(2)O) = 1.23 V vs. NHE] than common catholytes (e.g., iodide, sulfur), a high discharge voltage is produced. The solar water battery also exhibits a superior storage ability, maintaining 99% of its specific discharge capacitance after 10 h of storage, without any evidence of self-discharge. The optimization of the cell design and configuration, taking the presence of oxygen in the cell into account, was critical to achieving an efficient photocharge/discharge. Nature Publishing Group 2016-09-15 /pmc/articles/PMC5024119/ /pubmed/27629362 http://dx.doi.org/10.1038/srep33400 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Kim, Gonu Oh, Misol Park, Yiseul Solar-rechargeable battery based on photoelectrochemical water oxidation: Solar water battery |
title | Solar-rechargeable battery based on photoelectrochemical water oxidation: Solar water battery |
title_full | Solar-rechargeable battery based on photoelectrochemical water oxidation: Solar water battery |
title_fullStr | Solar-rechargeable battery based on photoelectrochemical water oxidation: Solar water battery |
title_full_unstemmed | Solar-rechargeable battery based on photoelectrochemical water oxidation: Solar water battery |
title_short | Solar-rechargeable battery based on photoelectrochemical water oxidation: Solar water battery |
title_sort | solar-rechargeable battery based on photoelectrochemical water oxidation: solar water battery |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5024119/ https://www.ncbi.nlm.nih.gov/pubmed/27629362 http://dx.doi.org/10.1038/srep33400 |
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