Integrated hybrid architecture of metal and biochar for high performance asymmetric supercapacitors

Abstract Two state-of-the-art electrodes were successfully synthesized and used to assemble both symmetric and asymmetric type supercapacitors. 3DFAB was fabricated by direct pyrolysis of green macroalgae in the presence of NaOH. Possible NaOH activation mechanisms are proposed, which explains the f...

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Autores principales:	Omid Norouzi, S. E. M. Pourhosseini, Hamid Reza Naderi, Francesco Di Maria, Animesh Dutta
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7f37de8389ca442a9b2b4a5325ca9603
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spelling	oai:doaj.org-article:7f37de8389ca442a9b2b4a5325ca96032021-12-02T11:35:40ZIntegrated hybrid architecture of metal and biochar for high performance asymmetric supercapacitors10.1038/s41598-021-84979-z2045-2322https://doaj.org/article/7f37de8389ca442a9b2b4a5325ca96032021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84979-zhttps://doaj.org/toc/2045-2322Abstract Two state-of-the-art electrodes were successfully synthesized and used to assemble both symmetric and asymmetric type supercapacitors. 3DFAB was fabricated by direct pyrolysis of green macroalgae in the presence of NaOH. Possible NaOH activation mechanisms are proposed, which explains the formation of oxygen functional groups through quick penetration of OH- and NaOH into the vacancies. To obtain CoTLM, the tile-like architecture of cobalt oxides was introduced to the 3D interconnected functional algal biochar (3DFAB) by a simple one-pot hydrothermal method under mild conditions. For the symmetric supercapacitors, the maximum specific capacitance of RAB, 3DFAB, and CoTLM were 158, 296, and 445 F g−1 at the current density of 1 A g−1. Regarding cobalt-based asymmetric systems, the maximum capacitance for the 3DFAB//CoTLM was 411 F g−1. This asymmetric supercapacitor device also retained 100.9% of its initial capacitance after 4000 cycles at the current density of 4 A g−1. Unbuffered aqueous electrolyte and the unique morphological structure used in this study might catapult forward commercialization of such advanced energy storage devices.Omid NorouziS. E. M. PourhosseiniHamid Reza NaderiFrancesco Di MariaAnimesh DuttaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Omid Norouzi S. E. M. Pourhosseini Hamid Reza Naderi Francesco Di Maria Animesh Dutta Integrated hybrid architecture of metal and biochar for high performance asymmetric supercapacitors
description	Abstract Two state-of-the-art electrodes were successfully synthesized and used to assemble both symmetric and asymmetric type supercapacitors. 3DFAB was fabricated by direct pyrolysis of green macroalgae in the presence of NaOH. Possible NaOH activation mechanisms are proposed, which explains the formation of oxygen functional groups through quick penetration of OH- and NaOH into the vacancies. To obtain CoTLM, the tile-like architecture of cobalt oxides was introduced to the 3D interconnected functional algal biochar (3DFAB) by a simple one-pot hydrothermal method under mild conditions. For the symmetric supercapacitors, the maximum specific capacitance of RAB, 3DFAB, and CoTLM were 158, 296, and 445 F g−1 at the current density of 1 A g−1. Regarding cobalt-based asymmetric systems, the maximum capacitance for the 3DFAB//CoTLM was 411 F g−1. This asymmetric supercapacitor device also retained 100.9% of its initial capacitance after 4000 cycles at the current density of 4 A g−1. Unbuffered aqueous electrolyte and the unique morphological structure used in this study might catapult forward commercialization of such advanced energy storage devices.
format	article
author	Omid Norouzi S. E. M. Pourhosseini Hamid Reza Naderi Francesco Di Maria Animesh Dutta
author_facet	Omid Norouzi S. E. M. Pourhosseini Hamid Reza Naderi Francesco Di Maria Animesh Dutta
author_sort	Omid Norouzi
title	Integrated hybrid architecture of metal and biochar for high performance asymmetric supercapacitors
title_short	Integrated hybrid architecture of metal and biochar for high performance asymmetric supercapacitors
title_full	Integrated hybrid architecture of metal and biochar for high performance asymmetric supercapacitors
title_fullStr	Integrated hybrid architecture of metal and biochar for high performance asymmetric supercapacitors
title_full_unstemmed	Integrated hybrid architecture of metal and biochar for high performance asymmetric supercapacitors
title_sort	integrated hybrid architecture of metal and biochar for high performance asymmetric supercapacitors
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7f37de8389ca442a9b2b4a5325ca9603
work_keys_str_mv	AT omidnorouzi integratedhybridarchitectureofmetalandbiocharforhighperformanceasymmetricsupercapacitors AT sempourhosseini integratedhybridarchitectureofmetalandbiocharforhighperformanceasymmetricsupercapacitors AT hamidrezanaderi integratedhybridarchitectureofmetalandbiocharforhighperformanceasymmetricsupercapacitors AT francescodimaria integratedhybridarchitectureofmetalandbiocharforhighperformanceasymmetricsupercapacitors AT animeshdutta integratedhybridarchitectureofmetalandbiocharforhighperformanceasymmetricsupercapacitors
_version_	1718395827930529792

Integrated hybrid architecture of metal and biochar for high performance asymmetric supercapacitors

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