Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors.

The cycling performance of supercapacitors sometimes becomes limited when electrode materials slough off during frequent charge-discharge cycles, due to weak bonding between the active material and the current collector. In this work, a flexible graphite foil substrate was successfully used as the c...

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Autores principales:	Shahrzad Arshadi Rastabi, Rasoul Sarraf-Mamoory, Ghadir Razaz, Nicklas Blomquist, Magnus Hummelgård, Håkan Olin
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/72e74622724541af994f938eea086950
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spelling	oai:doaj.org-article:72e74622724541af994f938eea0869502021-12-02T20:09:41ZTreatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors.1932-620310.1371/journal.pone.0254023https://doaj.org/article/72e74622724541af994f938eea0869502021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0254023https://doaj.org/toc/1932-6203The cycling performance of supercapacitors sometimes becomes limited when electrode materials slough off during frequent charge-discharge cycles, due to weak bonding between the active material and the current collector. In this work, a flexible graphite foil substrate was successfully used as the current collector for supercapacitor electrodes. Graphite foil substrates were treated in different ways with different acid concentrations and temperatures before being coated with an active material (NiMoO4/nanographite). The electrode treated with HNO3 (65%) and H2SO4 (95%) in a 1:1 ratio at 24°C gave better electrochemical performance than did electrodes treated in other ways. This electrode had capacitances of 441 and 184 Fg-1 at current densities of 0.5 and 10 Ag-1, respectively, with a good rate capability over the current densities of the other treated electrodes. SEM observation of the electrodes revealed that NiMoO4 with a morphology of nanorods 100-120 nm long was properly accommodated on the graphite surface during the charge-discharge process. It also showed that treatment with high-concentration acid created an appropriately porous and rough surface on the graphite, enhancing the adhesion of NiMoO4/nanographite and boosting the electrochemical performance.Shahrzad Arshadi RastabiRasoul Sarraf-MamooryGhadir RazazNicklas BlomquistMagnus HummelgårdHåkan OlinPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 7, p e0254023 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shahrzad Arshadi Rastabi Rasoul Sarraf-Mamoory Ghadir Razaz Nicklas Blomquist Magnus Hummelgård Håkan Olin Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors.
description	The cycling performance of supercapacitors sometimes becomes limited when electrode materials slough off during frequent charge-discharge cycles, due to weak bonding between the active material and the current collector. In this work, a flexible graphite foil substrate was successfully used as the current collector for supercapacitor electrodes. Graphite foil substrates were treated in different ways with different acid concentrations and temperatures before being coated with an active material (NiMoO4/nanographite). The electrode treated with HNO3 (65%) and H2SO4 (95%) in a 1:1 ratio at 24°C gave better electrochemical performance than did electrodes treated in other ways. This electrode had capacitances of 441 and 184 Fg-1 at current densities of 0.5 and 10 Ag-1, respectively, with a good rate capability over the current densities of the other treated electrodes. SEM observation of the electrodes revealed that NiMoO4 with a morphology of nanorods 100-120 nm long was properly accommodated on the graphite surface during the charge-discharge process. It also showed that treatment with high-concentration acid created an appropriately porous and rough surface on the graphite, enhancing the adhesion of NiMoO4/nanographite and boosting the electrochemical performance.
format	article
author	Shahrzad Arshadi Rastabi Rasoul Sarraf-Mamoory Ghadir Razaz Nicklas Blomquist Magnus Hummelgård Håkan Olin
author_facet	Shahrzad Arshadi Rastabi Rasoul Sarraf-Mamoory Ghadir Razaz Nicklas Blomquist Magnus Hummelgård Håkan Olin
author_sort	Shahrzad Arshadi Rastabi
title	Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors.
title_short	Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors.
title_full	Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors.
title_fullStr	Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors.
title_full_unstemmed	Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors.
title_sort	treatment of nimoo4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/72e74622724541af994f938eea086950
work_keys_str_mv	AT shahrzadarshadirastabi treatmentofnimoo4nanographitenanocompositeelectrodesusingflexiblegraphitesubstrateforaqueoushybridsupercapacitors AT rasoulsarrafmamoory treatmentofnimoo4nanographitenanocompositeelectrodesusingflexiblegraphitesubstrateforaqueoushybridsupercapacitors AT ghadirrazaz treatmentofnimoo4nanographitenanocompositeelectrodesusingflexiblegraphitesubstrateforaqueoushybridsupercapacitors AT nicklasblomquist treatmentofnimoo4nanographitenanocompositeelectrodesusingflexiblegraphitesubstrateforaqueoushybridsupercapacitors AT magnushummelgard treatmentofnimoo4nanographitenanocompositeelectrodesusingflexiblegraphitesubstrateforaqueoushybridsupercapacitors AT hakanolin treatmentofnimoo4nanographitenanocompositeelectrodesusingflexiblegraphitesubstrateforaqueoushybridsupercapacitors
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Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors.

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