Carbon black as an alternative cathode material for electrical energy recovery and transfer in a microbial battery

Abstract Rather than the conventional concept of viewing conductive carbon black (CB) to be chemically inert in microbial electrochemical cells (MECs), here we confirmed the redox activity of CB for its feasibility as an electron sink in the microbial battery (MB). Acting as the cathode of a MB, the...

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Autores principales:	Xueqin Zhang, Kun Guo, Dongsheng Shen, Huajun Feng, Meizhen Wang, Yuyang Zhou, Yufeng Jia, Yuxiang Liang, Mengjiao Zhou
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/aa5c33bdbca84055a18159a69704e649
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spelling	oai:doaj.org-article:aa5c33bdbca84055a18159a69704e6492021-12-02T16:07:05ZCarbon black as an alternative cathode material for electrical energy recovery and transfer in a microbial battery10.1038/s41598-017-07174-z2045-2322https://doaj.org/article/aa5c33bdbca84055a18159a69704e6492017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07174-zhttps://doaj.org/toc/2045-2322Abstract Rather than the conventional concept of viewing conductive carbon black (CB) to be chemically inert in microbial electrochemical cells (MECs), here we confirmed the redox activity of CB for its feasibility as an electron sink in the microbial battery (MB). Acting as the cathode of a MB, the solid-state CB electrode showed the highest electron capacity equivalent of 18.58 ± 0.46 C/g for the unsintered one and the lowest capacity of 2.29 ± 0.48 C/g for the one sintered under 100% N2 atmosphere. The capacity vibrations of CBs were strongly in coincidence with the abundances of C=O moiety caused by different pretreatments and it implied one plausible mechanism based on CB’s surface functionality for its electron capturing. Once subjected to electron saturation, CB could be completely regenerated by different strategies in terms of electrochemical discharging or donating electrons to biologically-catalyzed nitrate reduction. Surface characterization also revealed that CB’s regeneration fully depended on the reversible shift of C=O moiety, further confirming the functionality-based mechanism for CB’s feasibility as the role of MB’s cathode. Moreover, resilience tests demonstrated that CB cathode was robust for the multi-cycles charging-discharging operations. These results imply that CB is a promising alternative material for the solid-state cathode in MBs.Xueqin ZhangKun GuoDongsheng ShenHuajun FengMeizhen WangYuyang ZhouYufeng JiaYuxiang LiangMengjiao ZhouNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xueqin Zhang Kun Guo Dongsheng Shen Huajun Feng Meizhen Wang Yuyang Zhou Yufeng Jia Yuxiang Liang Mengjiao Zhou Carbon black as an alternative cathode material for electrical energy recovery and transfer in a microbial battery
description	Abstract Rather than the conventional concept of viewing conductive carbon black (CB) to be chemically inert in microbial electrochemical cells (MECs), here we confirmed the redox activity of CB for its feasibility as an electron sink in the microbial battery (MB). Acting as the cathode of a MB, the solid-state CB electrode showed the highest electron capacity equivalent of 18.58 ± 0.46 C/g for the unsintered one and the lowest capacity of 2.29 ± 0.48 C/g for the one sintered under 100% N2 atmosphere. The capacity vibrations of CBs were strongly in coincidence with the abundances of C=O moiety caused by different pretreatments and it implied one plausible mechanism based on CB’s surface functionality for its electron capturing. Once subjected to electron saturation, CB could be completely regenerated by different strategies in terms of electrochemical discharging or donating electrons to biologically-catalyzed nitrate reduction. Surface characterization also revealed that CB’s regeneration fully depended on the reversible shift of C=O moiety, further confirming the functionality-based mechanism for CB’s feasibility as the role of MB’s cathode. Moreover, resilience tests demonstrated that CB cathode was robust for the multi-cycles charging-discharging operations. These results imply that CB is a promising alternative material for the solid-state cathode in MBs.
format	article
author	Xueqin Zhang Kun Guo Dongsheng Shen Huajun Feng Meizhen Wang Yuyang Zhou Yufeng Jia Yuxiang Liang Mengjiao Zhou
author_facet	Xueqin Zhang Kun Guo Dongsheng Shen Huajun Feng Meizhen Wang Yuyang Zhou Yufeng Jia Yuxiang Liang Mengjiao Zhou
author_sort	Xueqin Zhang
title	Carbon black as an alternative cathode material for electrical energy recovery and transfer in a microbial battery
title_short	Carbon black as an alternative cathode material for electrical energy recovery and transfer in a microbial battery
title_full	Carbon black as an alternative cathode material for electrical energy recovery and transfer in a microbial battery
title_fullStr	Carbon black as an alternative cathode material for electrical energy recovery and transfer in a microbial battery
title_full_unstemmed	Carbon black as an alternative cathode material for electrical energy recovery and transfer in a microbial battery
title_sort	carbon black as an alternative cathode material for electrical energy recovery and transfer in a microbial battery
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/aa5c33bdbca84055a18159a69704e649
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_version_	1718384736314851328

Carbon black as an alternative cathode material for electrical energy recovery and transfer in a microbial battery

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