Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Kim, Gonu, Oh, Misol, Park, Yiseul
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
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
_version_ 1782453748969242624
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
work_keys_str_mv AT kimgonu solarrechargeablebatterybasedonphotoelectrochemicalwateroxidationsolarwaterbattery
AT ohmisol solarrechargeablebatterybasedonphotoelectrochemicalwateroxidationsolarwaterbattery
AT parkyiseul solarrechargeablebatterybasedonphotoelectrochemicalwateroxidationsolarwaterbattery