Co2P wrapped Co3O4 grass-like nanowires for improved electrochemical performance in supercapacitors

As a new type of energy storage device, supercapacitor has gained a lot of popularity due to its superior power density than batteries. However, the poor energy density has become the impetus for the research of electrode materials with both high energy density and power density. In this paper, gras...

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Autores principales:	Wei Guo, Yamei Tian, Shuang Wang, Jinping Li
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Hydrothermal Co3O4@Co2P High energy density Supercapacitor Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/994505578b1a4bd49f15937ad71bf1cf
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spelling	oai:doaj.org-article:994505578b1a4bd49f15937ad71bf1cf2021-11-26T04:39:19ZCo2P wrapped Co3O4 grass-like nanowires for improved electrochemical performance in supercapacitors2590-140010.1016/j.cesx.2021.100114https://doaj.org/article/994505578b1a4bd49f15937ad71bf1cf2021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2590140021000277https://doaj.org/toc/2590-1400As a new type of energy storage device, supercapacitor has gained a lot of popularity due to its superior power density than batteries. However, the poor energy density has become the impetus for the research of electrode materials with both high energy density and power density. In this paper, grass-like Co3O4@Co2P nanowires are prepared by a facile two-step method comprised of hydrothermal process and high temperature solid phase phosphating. As expect, the as-prepared sample shows an enhanced electrochemical performance. The specific capacity of Co3O4@Co2P can reach 652.1 C/g (1304.2 F/g) at a current density of 1 A/g, which is much higher than that of Co3O4 (228.5C/g). The rate capability and the cycling stability of Co3O4@Co2P are 64.3% at 10 A/g and 84% after 4000 cycles, respectively. Moreover, a hybrid supercapacitor (HSCs) has been assembled with Co3O4@Co2P as positive electrode and active carbon (AC) as negative electrodes. The maximum energy density and power density of HSC device are 31.3 Wh/kg and 8018.4 W/kg, respectively. Furthermore, the HSC device shows a cycling stability of 100% at the current density of 7 A/g after 10,000 cycles. These excellent properties show the potential applications of Co3O4@Co2P in the field of supercapacitors with high energy and power density.Wei GuoYamei TianShuang WangJinping LiElsevierarticleHydrothermalCo3O4@Co2PHigh energy densitySupercapacitorChemical engineeringTP155-156ENChemical Engineering Science: X, Vol 12, Iss , Pp 100114- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Hydrothermal Co3O4@Co2P High energy density Supercapacitor Chemical engineering TP155-156
spellingShingle	Hydrothermal Co3O4@Co2P High energy density Supercapacitor Chemical engineering TP155-156 Wei Guo Yamei Tian Shuang Wang Jinping Li Co2P wrapped Co3O4 grass-like nanowires for improved electrochemical performance in supercapacitors
description	As a new type of energy storage device, supercapacitor has gained a lot of popularity due to its superior power density than batteries. However, the poor energy density has become the impetus for the research of electrode materials with both high energy density and power density. In this paper, grass-like Co3O4@Co2P nanowires are prepared by a facile two-step method comprised of hydrothermal process and high temperature solid phase phosphating. As expect, the as-prepared sample shows an enhanced electrochemical performance. The specific capacity of Co3O4@Co2P can reach 652.1 C/g (1304.2 F/g) at a current density of 1 A/g, which is much higher than that of Co3O4 (228.5C/g). The rate capability and the cycling stability of Co3O4@Co2P are 64.3% at 10 A/g and 84% after 4000 cycles, respectively. Moreover, a hybrid supercapacitor (HSCs) has been assembled with Co3O4@Co2P as positive electrode and active carbon (AC) as negative electrodes. The maximum energy density and power density of HSC device are 31.3 Wh/kg and 8018.4 W/kg, respectively. Furthermore, the HSC device shows a cycling stability of 100% at the current density of 7 A/g after 10,000 cycles. These excellent properties show the potential applications of Co3O4@Co2P in the field of supercapacitors with high energy and power density.
format	article
author	Wei Guo Yamei Tian Shuang Wang Jinping Li
author_facet	Wei Guo Yamei Tian Shuang Wang Jinping Li
author_sort	Wei Guo
title	Co2P wrapped Co3O4 grass-like nanowires for improved electrochemical performance in supercapacitors
title_short	Co2P wrapped Co3O4 grass-like nanowires for improved electrochemical performance in supercapacitors
title_full	Co2P wrapped Co3O4 grass-like nanowires for improved electrochemical performance in supercapacitors
title_fullStr	Co2P wrapped Co3O4 grass-like nanowires for improved electrochemical performance in supercapacitors
title_full_unstemmed	Co2P wrapped Co3O4 grass-like nanowires for improved electrochemical performance in supercapacitors
title_sort	co2p wrapped co3o4 grass-like nanowires for improved electrochemical performance in supercapacitors
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/994505578b1a4bd49f15937ad71bf1cf
work_keys_str_mv	AT weiguo co2pwrappedco3o4grasslikenanowiresforimprovedelectrochemicalperformanceinsupercapacitors AT yameitian co2pwrappedco3o4grasslikenanowiresforimprovedelectrochemicalperformanceinsupercapacitors AT shuangwang co2pwrappedco3o4grasslikenanowiresforimprovedelectrochemicalperformanceinsupercapacitors AT jinpingli co2pwrappedco3o4grasslikenanowiresforimprovedelectrochemicalperformanceinsupercapacitors
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Co2P wrapped Co3O4 grass-like nanowires for improved electrochemical performance in supercapacitors

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