高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (6): 1242-1248.doi: 10.7503/cjcu20170763

• 物理化学 • 上一篇    下一篇

沥青改性稻壳基活性炭的制备及电化学性能

刘艳华, 金璐, 薛北辰, 郭玉鹏()   

  1. 吉林大学化学学院, 长春 130012
  • 收稿日期:2017-11-24 出版日期:2018-06-10 发布日期:2018-05-24
  • 基金资助:
    吉林省科技发展计划项目(批准号: 20150204063GX)资助.

Preparation and Electrochemical Properties of Rice Husk Based Activated Carbon Modified by Pitch

LIU Yanhua, JIN Lu, XUE Beichen, GUO Yupeng*()   

  1. College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2017-11-24 Online:2018-06-10 Published:2018-05-24
  • Contact: GUO Yupeng E-mail:guoyupeng@jlu.edu.cn
  • Supported by:
    † Supported by the Scientific and Technological Planning Project of Jilin Province, China(No.20150204063GX).

摘要:

以固定碳含量高、 导电性好的沥青为改性剂, 通过低温混匀、 中温固化的方法对稻壳基活性炭进行改性. 结果表明, 沥青与活性炭的最优质量比为1∶5, 沥青改性后的稻壳基活性炭在1 mol/L Et4NBF4/PC电解液中, 体积比电容由67.54 F/mL提升至84.34 F/mL. 在1 A/g电流密度下恒流充放电10000次后, 沥青改性的活性炭仍有91.52%的电容保持率, 远高于未改性活性炭的保持率(84.11%).

关键词: 改性, 稻壳基活性炭, 超级电容器, 沥青

Abstract:

Coal tar pitch with high carbon content and good conductivity were used as surface coating agents to modify rice husk-based activated carbon(RHAC) by low temperature mixing and medium temperature curing. The experimental results show that the optimum mixing mass ratio of pitch to RHAC is 1∶5, in the organic electrolyte 1 mol/L of Et4NBF4/PC system, the volumetric capacitance from the original 67.54 F/mL to 84.34 F/mL. The volumetric capacitance was significantly increased. In addition, in the cyclic stability test, the capacitance retention rate of pitch-coated activated carbon was 91.52%, which was higher than that of unmodified activated carbon(84.11%) after 10000 cycles at the current density of 1 A/g. This method has greatly improved the electrochemical performance of rice husk-based activated carbon, which is simple and easy, green and pollution-free, provides a feasible method for the industrial production.

Key words: Modification, Rice husk-based activated carbon, Volumetric capacitance, Pitch

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