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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...

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Autores principales: Ma, Dui, Hu, Bo, Wu, Wenda, Liu, Xi, Zai, Jiantao, Shu, Chen, Tadesse Tsega, Tsegaye, Chen, Liwei, Qian, Xuefeng, Liu, T. Leo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
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.
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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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