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Hierarchical 3D Cobalt‐Doped Fe3O4 Nanospheres@NG Hybrid as an Advanced Anode Material for High‐Performance Asymmetric Supercapacitors

Hierarchical nanostructure, high electrical conductivity, extraordinary specific surface area, and unique porous architecture are essential properties in energy storage and conversion studies. A new type of hierarchical 3D cobalt encapsulated FeO nanosphere is successfully developed on N‐graphene sh... Full description

Journal Title: Small September 2017, Vol.13(33), pp.n/a-n/a
Main Author: Guo, Meng
Other Authors: Balamurugan, Jayaraman , Li, Xuyang , Kim, Nam Hoon , Lee, Joong Hee
Format: Electronic Article Electronic Article
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Subjects:
3d
ID: ISSN: 1613-6810 ; E-ISSN: 1613-6829 ; DOI: 10.1002/smll.201701275
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recordid: wj10.1002/smll.201701275
title: Hierarchical 3D Cobalt‐Doped Fe3O4 Nanospheres@NG Hybrid as an Advanced Anode Material for High‐Performance Asymmetric Supercapacitors
format: Article
creator:
  • Guo, Meng
  • Balamurugan, Jayaraman
  • Li, Xuyang
  • Kim, Nam Hoon
  • Lee, Joong Hee
subjects:
  • 3d
  • Anode
  • Cobalt Encapsulated Fe 3 O 4 Nanospheres
  • Graphene
  • Supercapacitors
ispartof: Small, September 2017, Vol.13(33), pp.n/a-n/a
description: Hierarchical nanostructure, high electrical conductivity, extraordinary specific surface area, and unique porous architecture are essential properties in energy storage and conversion studies. A new type of hierarchical 3D cobalt encapsulated FeO nanosphere is successfully developed on N‐graphene sheet (Co−FeO NS@NG) hybrid with unique nanostructure by simple, scalable, and efficient solvothermal technique. When applied as an electrode material for supercapacitors, hierarchical Co−FeO NS@NG hybrid shows an ultrahigh specific capacitance (775 F g at a current density of 1 A g) with exceptional rate capability (475 F g at current density of 50 A g), and admirable cycling performance (97.1% capacitance retention after 10 000 cycles). Furthermore, the fabricated Co−FeO NS@NG//CoMnO@NG asymmetric supercapacitor (ASC) device exhibits a high energy density of 89.1 Wh kg at power density of 0.901 kW kg, and outstanding cycling performance (89.3% capacitance retention after 10 000 cycles). Such eminent electrochemical properties of the Co−FeO NS@NG are due to the high electrical conductivity, ultrahigh surface area, and unique porous architecture. This research first proposes hierarchical Co−FeO NS@NG hybrid as an ultrafast charge−discharge anode material for the ASC device, that holds great potential for the development of high‐performance energy storage devices. is successfully fabricated by a one‐step solvothermal method and used as an anode for high‐energy asymmetric supercapacitors (ASCs). The fabricated CoMnO@NG//Co‐FeO NS@NG ASC delivers ultrahigh energy density of 89.1 Wh kg at power density of 901 W kg.
language:
source:
identifier: ISSN: 1613-6810 ; E-ISSN: 1613-6829 ; DOI: 10.1002/smll.201701275
fulltext: fulltext
issn:
  • 1613-6810
  • 16136810
  • 1613-6829
  • 16136829
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titleHierarchical 3D Cobalt‐Doped Fe3O4 Nanospheres@NG Hybrid as an Advanced Anode Material for High‐Performance Asymmetric Supercapacitors
creatorGuo, Meng ; Balamurugan, Jayaraman ; Li, Xuyang ; Kim, Nam Hoon ; Lee, Joong Hee
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subject3d ; Anode ; Cobalt Encapsulated Fe 3 O 4 Nanospheres ; Graphene ; Supercapacitors
descriptionHierarchical nanostructure, high electrical conductivity, extraordinary specific surface area, and unique porous architecture are essential properties in energy storage and conversion studies. A new type of hierarchical 3D cobalt encapsulated FeO nanosphere is successfully developed on N‐graphene sheet (Co−FeO NS@NG) hybrid with unique nanostructure by simple, scalable, and efficient solvothermal technique. When applied as an electrode material for supercapacitors, hierarchical Co−FeO NS@NG hybrid shows an ultrahigh specific capacitance (775 F g at a current density of 1 A g) with exceptional rate capability (475 F g at current density of 50 A g), and admirable cycling performance (97.1% capacitance retention after 10 000 cycles). Furthermore, the fabricated Co−FeO NS@NG//CoMnO@NG asymmetric supercapacitor (ASC) device exhibits a high energy density of 89.1 Wh kg at power density of 0.901 kW kg, and outstanding cycling performance (89.3% capacitance retention after 10 000 cycles). Such eminent electrochemical properties of the Co−FeO NS@NG are due to the high electrical conductivity, ultrahigh surface area, and unique porous architecture. This research first proposes hierarchical Co−FeO NS@NG hybrid as an ultrafast charge−discharge anode material for the ASC device, that holds great potential for the development of high‐performance energy storage devices. is successfully fabricated by a one‐step solvothermal method and used as an anode for high‐energy asymmetric supercapacitors (ASCs). The fabricated CoMnO@NG//Co‐FeO NS@NG ASC delivers ultrahigh energy density of 89.1 Wh kg at power density of 901 W kg.
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titleHierarchical 3D Cobalt‐Doped Fe3O4 Nanospheres@NG Hybrid as an Advanced Anode Material for High‐Performance Asymmetric Supercapacitors
descriptionHierarchical nanostructure, high electrical conductivity, extraordinary specific surface area, and unique porous architecture are essential properties in energy storage and conversion studies. A new type of hierarchical 3D cobalt encapsulated FeO nanosphere is successfully developed on N‐graphene sheet (Co−FeO NS@NG) hybrid with unique nanostructure by simple, scalable, and efficient solvothermal technique. When applied as an electrode material for supercapacitors, hierarchical Co−FeO NS@NG hybrid shows an ultrahigh specific capacitance (775 F g at a current density of 1 A g) with exceptional rate capability (475 F g at current density of 50 A g), and admirable cycling performance (97.1% capacitance retention after 10 000 cycles). Furthermore, the fabricated Co−FeO NS@NG//CoMnO@NG asymmetric supercapacitor (ASC) device exhibits a high energy density of 89.1 Wh kg at power density of 0.901 kW kg, and outstanding cycling performance (89.3% capacitance retention after 10 000 cycles). Such eminent electrochemical properties of the Co−FeO NS@NG are due to the high electrical conductivity, ultrahigh surface area, and unique porous architecture. This research first proposes hierarchical Co−FeO NS@NG hybrid as an ultrafast charge−discharge anode material for the ASC device, that holds great potential for the development of high‐performance energy storage devices. is successfully fabricated by a one‐step solvothermal method and used as an anode for high‐energy asymmetric supercapacitors (ASCs). The fabricated CoMnO@NG//Co‐FeO NS@NG ASC delivers ultrahigh energy density of 89.1 Wh kg at power density of 901 W kg.
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abstractHierarchical nanostructure, high electrical conductivity, extraordinary specific surface area, and unique porous architecture are essential properties in energy storage and conversion studies. A new type of hierarchical 3D cobalt encapsulated FeO nanosphere is successfully developed on N‐graphene sheet (Co−FeO NS@NG) hybrid with unique nanostructure by simple, scalable, and efficient solvothermal technique. When applied as an electrode material for supercapacitors, hierarchical Co−FeO NS@NG hybrid shows an ultrahigh specific capacitance (775 F g at a current density of 1 A g) with exceptional rate capability (475 F g at current density of 50 A g), and admirable cycling performance (97.1% capacitance retention after 10 000 cycles). Furthermore, the fabricated Co−FeO NS@NG//CoMnO@NG asymmetric supercapacitor (ASC) device exhibits a high energy density of 89.1 Wh kg at power density of 0.901 kW kg, and outstanding cycling performance (89.3% capacitance retention after 10 000 cycles). Such eminent electrochemical properties of the Co−FeO NS@NG are due to the high electrical conductivity, ultrahigh surface area, and unique porous architecture. This research first proposes hierarchical Co−FeO NS@NG hybrid as an ultrafast charge−discharge anode material for the ASC device, that holds great potential for the development of high‐performance energy storage devices. is successfully fabricated by a one‐step solvothermal method and used as an anode for high‐energy asymmetric supercapacitors (ASCs). The fabricated CoMnO@NG//Co‐FeO NS@NG ASC delivers ultrahigh energy density of 89.1 Wh kg at power density of 901 W kg.
doi10.1002/smll.201701275
pages1-12
date2017-09