Three-dimensional strutted graphene loading manganese oxide for supercapacitor

LI Xinjian; WANG Baolu; GAO Tian; WANG Qi; WANG Xuebin

doi:10.11949/0438-1157.20200797

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Three-dimensional strutted graphene loading manganese oxide for supercapacitor

Celebration Column for School of Chemistry and Chemical Engineering\, Nanjing University | 更新时间：2026-07-24

- Three-dimensional strutted graphene loading manganese oxide for supercapacitor
- CIESC Journal Vol. 71, Issue 11, Pages: 5025-5034(2020)
- 作者机构：
  
  固体微结构物理国家重点实验室，人工微结构科学与技术协同创新中心，江苏省功能材料设计原理与应用技术重点实验室，南京大学现代工程与应用科学学院，江苏南京 210093
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20200797
  CLC： TQ 031.2
- Received：22 June 2020，
  
  Revised：2020-09-08，
  
  Online First：03 November 2020，
  
  Published：05 November 2020
- 稿件说明：
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李鑫健, 王保禄, 高天, 王旗, 王学斌. 三维筋撑石墨烯负载氧化锰的超级电容器[J]. 化工学报, 2020, 71(11): 5025-5034

LI Xinjian, WANG Baolu, GAO Tian, WANG Qi, WANG Xuebin. Three-dimensional strutted graphene loading manganese oxide for supercapacitor[J]. CIESC Journal, 2020, 71(11): 5025-5034
李鑫健, 王保禄, 高天, 王旗, 王学斌. 三维筋撑石墨烯负载氧化锰的超级电容器[J]. 化工学报, 2020, 71(11): 5025-5034 DOI： 10.11949/0438-1157.20200797.

LI Xinjian, WANG Baolu, GAO Tian, WANG Qi, WANG Xuebin. Three-dimensional strutted graphene loading manganese oxide for supercapacitor[J]. CIESC Journal, 2020, 71(11): 5025-5034 DOI： 10.11949/0438-1157.20200797.

摘要

石墨烯基超级电容器，其功率密度较高，但能量密度受限。开发以三维石墨烯材料为载体的复合型赝电容多孔电极，是解决方案之一。本文采用铵盐辅助化学发泡法，制备了三维筋撑石墨烯泡沫体（SG）；以SG为载体，采用水热还原法在其表面生长二氧化锰（MnO

）纳米棒阵列，从而构建了MnO

/SG自支撑多孔材料。利用MnO

/SG复合电极，组装了超级电容器，在0.5 A·g

-1

的电流密度下，比电容达343.6 F·g

-1

；经5000次循环，其容量保持率为83.8%；在500 W·kg

-1

的功率密度下，其能量密度达11.93 W·h·kg

-1

。因此，MnO

/SG复合电极是一种性能优异的赝电容材料，在电化学储能领域有良好的应用前景。

Abstract

Graphene has shown superiorit

y for advanced carbon electrodes in supercapacitors， characterized by high power density but limited energy density. Combining pseudocapacitive materials with graphene can alleviate the problem. This work synthesized the three-dimensional strutted graphene (SG)

via

the ammonium-salt-assisted sugar-blowing method

and the self-supporting MnO

/SG porous monolith was then constructed

via

growing manganese oxide (MnO

) nanorod array on the SG support in hydrothermal process. When tested in supercapacitor， the MnO

/SG hybrid electrode achieved a high specific capacitance of 343.6 F·g

-1

at a current density of 0.5 A·g

-1

， exhibiting excellent cycling stability with 83.8% capacitance retention after 5000 cycles. The symmetric supercapacitor further showed a high energy density of 11.93 W·h·kg

-1

at a power density of 500 W·kg

-1

. The impressive result indicates a promising prospect of the excellent MnO

/SG hybrid to be applied to electrochemical energy storage.

关键词

Keywords

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