In situ activation graphitization to fabricate hierarchical porous graphitic carbon for supercapacitor

Abstract In situ activation–graphitization method based on the atomically dispersed K and Fe in organic salts is developed to synthesize hierarchical porous graphitic carbon by directly pyrolysis potassium citrate and iron citrate. Moreover, (NH4)2C2O4 is also employed as both N dopant and porogen t...

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Autores principales:	Yanling Zhao, Xiaohua Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3b9daa8325af45e6b5f2287b750de4c5
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spelling	oai:doaj.org-article:3b9daa8325af45e6b5f2287b750de4c52021-12-02T11:45:01ZIn situ activation graphitization to fabricate hierarchical porous graphitic carbon for supercapacitor10.1038/s41598-021-85661-02045-2322https://doaj.org/article/3b9daa8325af45e6b5f2287b750de4c52021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-85661-0https://doaj.org/toc/2045-2322Abstract In situ activation–graphitization method based on the atomically dispersed K and Fe in organic salts is developed to synthesize hierarchical porous graphitic carbon by directly pyrolysis potassium citrate and iron citrate. Moreover, (NH4)2C2O4 is also employed as both N dopant and porogen to open up internal structure and regulate pore structure. The inside-out activation leads to the homogeneous reaction and interconnected hierarchical porous structure with few dead pores. Accompanied by high specific surface area, appropriate pore distribution, good conductivity, and N/O functional groups, the sample exhibits high capacitance of 322.6 F g−1 at 0.5 A g−1, good rate capability, and excellent cycling stability with 101.5% capacitance retention after 15,000 cycles. The supercapacitor shows an energy density of 21.3 W h kg−1 at 456.7 W kg−1 in 1 M Na2SO4. Easy synthesis, cost-effective, and environmentally benign, the work provides a promising strategy to produce hierarchical porous graphitic carbon applied in energy storage.Yanling ZhaoXiaohua ZhangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yanling Zhao Xiaohua Zhang In situ activation graphitization to fabricate hierarchical porous graphitic carbon for supercapacitor
description	Abstract In situ activation–graphitization method based on the atomically dispersed K and Fe in organic salts is developed to synthesize hierarchical porous graphitic carbon by directly pyrolysis potassium citrate and iron citrate. Moreover, (NH4)2C2O4 is also employed as both N dopant and porogen to open up internal structure and regulate pore structure. The inside-out activation leads to the homogeneous reaction and interconnected hierarchical porous structure with few dead pores. Accompanied by high specific surface area, appropriate pore distribution, good conductivity, and N/O functional groups, the sample exhibits high capacitance of 322.6 F g−1 at 0.5 A g−1, good rate capability, and excellent cycling stability with 101.5% capacitance retention after 15,000 cycles. The supercapacitor shows an energy density of 21.3 W h kg−1 at 456.7 W kg−1 in 1 M Na2SO4. Easy synthesis, cost-effective, and environmentally benign, the work provides a promising strategy to produce hierarchical porous graphitic carbon applied in energy storage.
format	article
author	Yanling Zhao Xiaohua Zhang
author_facet	Yanling Zhao Xiaohua Zhang
author_sort	Yanling Zhao
title	In situ activation graphitization to fabricate hierarchical porous graphitic carbon for supercapacitor
title_short	In situ activation graphitization to fabricate hierarchical porous graphitic carbon for supercapacitor
title_full	In situ activation graphitization to fabricate hierarchical porous graphitic carbon for supercapacitor
title_fullStr	In situ activation graphitization to fabricate hierarchical porous graphitic carbon for supercapacitor
title_full_unstemmed	In situ activation graphitization to fabricate hierarchical porous graphitic carbon for supercapacitor
title_sort	in situ activation graphitization to fabricate hierarchical porous graphitic carbon for supercapacitor
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3b9daa8325af45e6b5f2287b750de4c5
work_keys_str_mv	AT yanlingzhao insituactivationgraphitizationtofabricatehierarchicalporousgraphiticcarbonforsupercapacitor AT xiaohuazhang insituactivationgraphitizationtofabricatehierarchicalporousgraphiticcarbonforsupercapacitor
_version_	1718395274839195648

In situ activation graphitization to fabricate hierarchical porous graphitic carbon for supercapacitor

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