储能科学与技术 ›› 2016, Vol. 5 ›› Issue (4): 527-531.doi: 10.12028/j.issn.2095-4239.2016.04.018

• 研究及进展 • 上一篇    下一篇

3D-honeycomb carbons for high performance electrical double layer capacitors electrodes

QIAO Zhijun, RUAN Dianbo, YUAN Jun, FU Guansheng, YANG Bin   

  1. Institute of Supercapacitors, Ningbo CSR New Energy Technology Co., Ltd., Ningbo 315112, Zhejiang, China
  • 收稿日期:2016-01-28 出版日期:2016-07-01 发布日期:2016-07-01

3D-honeycomb carbons for high performance electrical double layer capacitors electrodes

QIAO Zhijun, RUAN Dianbo, YUAN Jun, FU Guansheng, YANG Bin   

  1. Institute of Supercapacitors, Ningbo CSR New Energy Technology Co., Ltd., Ningbo 315112, Zhejiang, China
  • Received:2016-01-28 Online:2016-07-01 Published:2016-07-01
  • Contact: RUAN Dianbo PhD, Senior Engineer, fields of research: development, manufacturing and application of the supercapacitor, E-mail：ruandianbo@csrcap.com.
  • About author: Qiao Zhijun (1985—), PhD, fields of research: carbon material and super capacitor, E-mail：zjqiao@csrcap.com
  • Supported by:
     This study was supported by the Ningbo’s Industrial Technology Innovation and Industrialization of Scientific and Technological Achievements Program (2013B6003)

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摘要：

 Sodium fulvic acid based hierarchical porous carbons (SFA-HPCs) with a specific surface area of 1919 m2/g and total volume of 1.7 cm3·g–1 has been synthesized by a simple self-template method. The carbon skeleton can be formatted by the decomposition process of sodium fulvic acid (SFA) in a N2 atmosphere. The sodium compund in SFA is used as a self-template to create the hierarchical porous structure. The unique hierarchical structure of SFA-HPCs provides an efficient pathway for electrolyte ions to be diffused into the internal surfaces of bulk electrode particles. It results in a high charge storage capacitance of 186 F·g–1 at current load of 40 A·g–1. The capacitance 230 F·g–1 at 0.05 A·g–1 and 186 F·g–1 at 40 A·g–1 show its high rate capability. Besides, it also achieves desirable cycling stability, 99.4% capacitance remained after 10000 cycles at 40 A·g–1.

关键词: sodium fulvic acid, hierarchical porous carbons, self-template method, high rate capability

Abstract:

 Sodium fulvic acid based hierarchical porous carbons (SFA-HPCs) with a specific surface area of 1919 m2/g and total volume of 1.7 cm3·g–1 has been synthesized by a simple self-template method. The carbon skeleton can be formatted by the decomposition process of sodium fulvic acid (SFA) in a N2 atmosphere. The sodium compund in SFA is used as a self-template to create the hierarchical porous structure. The unique hierarchical structure of SFA-HPCs provides an efficient pathway for electrolyte ions to be diffused into the internal surfaces of bulk electrode particles. It results in a high charge storage capacitance of 186 F·g–1 at current load of 40 A·g–1. The capacitance 230 F·g–1 at 0.05 A·g–1 and 186 F·g–1 at 40 A·g–1 show its high rate capability. Besides, it also achieves desirable cycling stability, 99.4% capacitance remained after 10000 cycles at 40 A·g–1.

Key words: sodium fulvic acid, hierarchical porous carbons, self-template method, high rate capability