高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (4): 959.doi: 10.7503/cjcu20120634

• 物理化学 • 上一篇    下一篇

阴离子嵌入型炭正极材料的制备及电容性能

李然1,2, 张浩1, 张香兰2, 曹高萍1   

  1. 1. 防化研究院, 北京 100191;
    2. 中国矿业大学(北京)化学与环境工程学院, 北京 100083
  • 收稿日期:2012-07-06 出版日期:2013-04-10 发布日期:2013-03-15
  • 通讯作者: 张浩,男,博士,副研究员,主要从事化学电源研究.E-mail:dr.h.zhang@hotmail.com E-mail:dr.h.zhang@hotmail.com
  • 基金资助:

    国家自然科学基金(批准号:50902149)资助.

Preparation and Capacitive Performance of the Anion Intercalation Graphite Materials as Positive Electrode Materials

LI Ran1,2, ZHANG Hao1, ZHANG Xiang-Lan2, CAO Gao-Ping1   

  1. 1. Research Institute of Chemical Defense, Beijing 100191, China;
    2. School of Chemical & Environmental Engineering, China University of Mining & Technology, Beijing 100083, China
  • Received:2012-07-06 Online:2013-04-10 Published:2013-03-15

摘要:

通过循环伏安、 恒流充放电和扫描电子显微镜等方法, 对在1500和2800℃下进行热处理的针状焦炭(NC)的微观结构及作为正极材料的储能特性进行研究, 考察了石墨化程度对材料储能性能的影响. 2种热处理NC在有机电解液中, 当电流密度为50 mA/g时, 放电比容量分别为70.1和90.6 mA·h/g; 当电流密度为5 A/g时, 2种NC的放电比容量为55 mA·h/g左右; 而商用活性炭当电流密度为50 mA/g时, 比容量只有35.9 mA·h/g. 2个NC在1 A/g的电流密度下循环1000次的保持率分别为95.7%和89.2%.

关键词: 电化学电容器, 正极, 石墨, 嵌入

Abstract:

Microstructure and energy storage performance of the needle coke heated at 1500 and 2800 ℃ were investigated by scanning electron micrograph(SEM), cyclic voltammetry(CV) and charge-discharge methods, and the influence of the degree of graphitization to the performance of graphite was studied. The specific discharge capacity of needle coke sintered at 1500 and 2800 ℃ were 70.1 and 90.6 mA·h/g in organic electrolyte when the current density was controlled at 50 mA/g. The specific capacity was 55 mA·h/g when the current density was raised to 5 A/g. However, the specific capacity of commercialization active carbon was only 35.9 mA·h/g when the current density was controlled at 50 mA/g. The retention of the capacitance after 1000 charge-discharge cycles were 95.7% and 89.2%, respectively, when the current density was controlled at 1 A/g.

Key words: Electrochemical capacitor, Positive electrode, Graphite, Insertion

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