储能科学与技术

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Graphene-supported ultra-small Co3O4 nanoparticles for high-performance supercapacitors

LIU Zheng, LI Ji, WU Xiaoliang, WEI Tong, FAN Zhuangjun   

  1. Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Scence and Chemical Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China
  • 收稿日期:2016-07-18 出版日期:2016-11-01 发布日期:2016-11-01
  • 通讯作者: FAN Zhuangjun,professor,E-mail:fanzhj666 @163.com.
  • 作者简介:LIU Zheng (1990—),male,E-mail:liuzhengbeyond @163.com;
  • 基金资助:
    Natural Science Foundation of Heilonjiang Province (E201416); the Natural Science Foundation of China (51672055), Ph.D.Programs Foundation of Ministry of Education of China (201223 04110020).

Graphene-supported ultra-small Co3O4 nanoparticles for high-performance supercapacitors

LIU Zheng, LI Ji, WU Xiaoliang, WEI Tong, FAN Zhuangjun   

  1. Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Scence and Chemical Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China
  • Received:2016-07-18 Online:2016-11-01 Published:2016-11-01
  • Contact: FAN Zhuangjun,professor,E-mail:fanzhj666 @163.com.
  • About author:LIU Zheng (1990—),male,E-mail:liuzhengbeyond @163.com;
  • Supported by:
    Natural Science Foundation of Heilonjiang Province (E201416); the Natural Science Foundation of China (51672055), Ph.D.Programs Foundation of Ministry of Education of China (201223 04110020).

摘要: Ultra-small Co3O4 nanoparticles/graphene hybrid material had been synthesized by a facile hydrothermal route and consequent calcination process. The as-obtained ultra-small Co3O4 nanoparticles with their sizes of 5–8 nm are tightly anchored on the surface of graphene (GNS). Benefiting from the ultra-small size of Co3O4 nanoparticles, the high interconnectivity of hybrid material as well as the high conductive networks constructed by GNS, which can provide a fast and efficient transportation of electron and electrolyte ions for the overall electrode, the as-prepared hybrid material exhibits a high specific capacitance of 462 F•g1 at 5 mV•s1 compared with pure Co3O4 (193 F•g1), and retained 88.2% of its initial capacitance after 2000 cycles, indicating a promising electrode material for supercapacitors.

关键词: ultra-small nanoparticles, cobalt oxides, graphene, supercapacitors

Abstract: Ultra-small Co3O4 nanoparticles/graphene hybrid material had been synthesized by a facile hydrothermal route and consequent calcination process. The as-obtained ultra-small Co3O4 nanoparticles with their sizes of 5–8 nm are tightly anchored on the surface of graphene (GNS). Benefiting from the ultra-small size of Co3O4 nanoparticles, the high interconnectivity of hybrid material as well as the high conductive networks constructed by GNS, which can provide a fast and efficient transportation of electron and electrolyte ions for the overall electrode, the as-prepared hybrid material exhibits a high specific capacitance of 462 F•g1 at 5 mV•s1 compared with pure Co3O4 (193 F•g1), and retained 88.2% of its initial capacitance after 2000 cycles, indicating a promising electrode material for supercapacitors.

Key words: ultra-small nanoparticles, cobalt oxides, graphene, supercapacitors