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Highly active nanostructured CoS(2)/CoS heterojunction electrocatalysts for aqueous polysulfide/iodide redox flow batteries
Aqueous polysulfide/iodide redox flow batteries are attractive for scalable energy storage due to their high energy density and low cost. However, their energy efficiency and power density are usually limited by poor electrochemical kinetics of the redox reactions of polysulfide/iodide ions on graph...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6662769/ https://www.ncbi.nlm.nih.gov/pubmed/31358738 http://dx.doi.org/10.1038/s41467-019-11176-y |
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author | Ma, Dui Hu, Bo Wu, Wenda Liu, Xi Zai, Jiantao Shu, Chen Tadesse Tsega, Tsegaye Chen, Liwei Qian, Xuefeng Liu, T. Leo |
author_facet | Ma, Dui Hu, Bo Wu, Wenda Liu, Xi Zai, Jiantao Shu, Chen Tadesse Tsega, Tsegaye Chen, Liwei Qian, Xuefeng Liu, T. Leo |
author_sort | Ma, Dui |
collection | PubMed |
description | Aqueous polysulfide/iodide redox flow batteries are attractive for scalable energy storage due to their high energy density and low cost. However, their energy efficiency and power density are usually limited by poor electrochemical kinetics of the redox reactions of polysulfide/iodide ions on graphite electrodes, which has become the main obstacle for their practical applications. Here, CoS(2)/CoS heterojunction nanoparticles with uneven charge distribution, which are synthesized in situ on graphite felt by a one-step solvothermal process, can significantly boost electrocatalytic activities of I(−)/I(3)(−) and S(2−)/S(x)(2−) redox reactions by improving absorptivity of charged ions and promoting charge transfer. The polysulfide/iodide flow battery with the graphene felt-CoS(2)/CoS heterojunction can deliver a high energy efficiency of 84.5% at a current density of 10 mA cm(−2), a power density of 86.2 mW cm(−2) and a stable energy efficiency retention of 96% after approximately 1000 h of continuous operation. |
format | Online Article Text |
id | pubmed-6662769 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-66627692019-07-29 Highly active nanostructured CoS(2)/CoS heterojunction electrocatalysts for aqueous polysulfide/iodide redox flow batteries Ma, Dui Hu, Bo Wu, Wenda Liu, Xi Zai, Jiantao Shu, Chen Tadesse Tsega, Tsegaye Chen, Liwei Qian, Xuefeng Liu, T. Leo Nat Commun Article Aqueous polysulfide/iodide redox flow batteries are attractive for scalable energy storage due to their high energy density and low cost. However, their energy efficiency and power density are usually limited by poor electrochemical kinetics of the redox reactions of polysulfide/iodide ions on graphite electrodes, which has become the main obstacle for their practical applications. Here, CoS(2)/CoS heterojunction nanoparticles with uneven charge distribution, which are synthesized in situ on graphite felt by a one-step solvothermal process, can significantly boost electrocatalytic activities of I(−)/I(3)(−) and S(2−)/S(x)(2−) redox reactions by improving absorptivity of charged ions and promoting charge transfer. The polysulfide/iodide flow battery with the graphene felt-CoS(2)/CoS heterojunction can deliver a high energy efficiency of 84.5% at a current density of 10 mA cm(−2), a power density of 86.2 mW cm(−2) and a stable energy efficiency retention of 96% after approximately 1000 h of continuous operation. Nature Publishing Group UK 2019-07-29 /pmc/articles/PMC6662769/ /pubmed/31358738 http://dx.doi.org/10.1038/s41467-019-11176-y Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Ma, Dui Hu, Bo Wu, Wenda Liu, Xi Zai, Jiantao Shu, Chen Tadesse Tsega, Tsegaye Chen, Liwei Qian, Xuefeng Liu, T. Leo Highly active nanostructured CoS(2)/CoS heterojunction electrocatalysts for aqueous polysulfide/iodide redox flow batteries |
title | Highly active nanostructured CoS(2)/CoS heterojunction electrocatalysts for aqueous polysulfide/iodide redox flow batteries |
title_full | Highly active nanostructured CoS(2)/CoS heterojunction electrocatalysts for aqueous polysulfide/iodide redox flow batteries |
title_fullStr | Highly active nanostructured CoS(2)/CoS heterojunction electrocatalysts for aqueous polysulfide/iodide redox flow batteries |
title_full_unstemmed | Highly active nanostructured CoS(2)/CoS heterojunction electrocatalysts for aqueous polysulfide/iodide redox flow batteries |
title_short | Highly active nanostructured CoS(2)/CoS heterojunction electrocatalysts for aqueous polysulfide/iodide redox flow batteries |
title_sort | highly active nanostructured cos(2)/cos heterojunction electrocatalysts for aqueous polysulfide/iodide redox flow batteries |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6662769/ https://www.ncbi.nlm.nih.gov/pubmed/31358738 http://dx.doi.org/10.1038/s41467-019-11176-y |
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