中间相沥青基活性炭的微观结构对电化学性能的影响

李宝华; 王　冠; 翟登云; 杜鸿达; 康飞宇

中间相沥青基活性炭的微观结构对电化学性能的影响

1. 清华大学深圳研究生院新材料研究所|广东深圳 518055;

2.
清华大学材料科学与工程系|北京 100084

基金项目: 国家自然基金(50632040，50802049，50972065和50902079), 广东省创新团队和深圳市科技计划项目（JP200806230010A，SG200810150054A）.

详细信息

作者简介:
李宝华（1974-）|男|山东临沭人,博士|副教授,硕士生导师,主要从事锂离子电池和电化学电容器电极材料研究. E-mail: libh@mail.sz.tsinghua.edu.cn

通讯作者:
康飞宇，教授，博士生导师. Tel/Fax: +86-755-2603-6118

中图分类号: TQ 127.1⁺1
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出版历程
- 收稿日期: 2011-04-10
- 录用日期: 2011-07-14
- 修回日期: 2011-05-30
- 刊出日期: 2011-06-20

The effect of the microstructure of mesophase-pitch-based activated carbons on their electrochemical performance for electric double layer capacitors

Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China|
2.
Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

Funds: National Natural Science Foundation of China(50632040, 50802049, 50972065 and 50902079), Guangdong Province Innovation R & D Team Plan and Shenzhen Technical Plan Project (JP200806230010A, SG200810150054A).

More Information

Author Bio:
LI Bao-hua(1974-), male, Associate Professor, engaged in the research of the electrode materials of lithium ion battery and electrochemical capacitor. E-mail: libh@mail.sz.tsinghua.edu.cn

Corresponding author: KANG Fei-yu, Professor. Tel/Fax: +86-755-2603-6118

摘要

摘要: 以中间相沥青(Mesophase pitch，MP)为前驱体、KOH作为活化剂，分别采用直接活化法、预炭化活化法制备出活性炭(Activated carbons, ACs)。采用N₂吸附法对所制ACs的比表面积、孔径分布进行分析。将所制ACs应用于电化学电容器电极材料，进行恒流充放电、循环伏安电化学分析。结果表明：电极的电化学性能不仅受活性炭比表面积、孔结构的影响，也与活性炭的微观形貌有关。其中预炭化活化法ACs颗粒具有片层结构，更有利于炭电极与电解液的浸润，提高微孔比表面积对比电容的贡献。
- 中间相沥青 /
- 直接活化 /
- 预炭化活化 /
- 活性炭 /
- 孔结构 /
- 微观形貌
Abstract: Activated carbons (ACs) prepared from mesophase pitch and carbonized mesophase pitch by KOH activation were used to fabricate electrodes for electric double layer capacitors. Nitrogen adsorption at 77K was used to characterize the specific surface area and pore structure of the ACs, which showed a bimodal pore size distribution. The performance of the ACs in an organic electrolyte (1mol/L of Et₄NBF₄ in propylene carbonate) was investigated with voltage sweep cyclic voltammetry and constant current charge-discharge cycling. Results show that the capacitance of the ACs not only depends on the surface area and pore size distribution, but also on carbonization treatment. SEM images show that the AC particles from carbonized pitch are formed by stacking of layered slices, which favors an infiltration of solvent into the inner surface of the carbon and improves the capacitance per unit area of micropores.
- Mesophase pitch /
- Direct activation /
- Pre-carbonization activation /
- Activated carbon /
- Pore structure /
- Microstructure

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中间相沥青基活性炭的微观结构对电化学性能的影响

作者简介:
李宝华（1974-）|男|山东临沭人,博士|副教授,硕士生导师,主要从事锂离子电池和电化学电容器电极材料研究. E-mail: libh@mail.sz.tsinghua.edu.cn

通讯作者:
康飞宇，教授，博士生导师. Tel/Fax: +86-755-2603-6118

计量

The effect of the microstructure of mesophase-pitch-based activated carbons on their electrochemical performance for electric double layer capacitors

Author Bio:
LI Bao-hua(1974-), male, Associate Professor, engaged in the research of the electrode materials of lithium ion battery and electrochemical capacitor. E-mail: libh@mail.sz.tsinghua.edu.cn

Corresponding author: KANG Fei-yu, Professor. Tel/Fax: +86-755-2603-6118

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中间相沥青基活性炭的微观结构对电化学性能的影响

作者简介: 李宝华（1974-）|男|山东临沭人,博士|副教授,硕士生导师,主要从事锂离子电池和电化学电容器电极材料研究. E-mail: libh@mail.sz.tsinghua.edu.cn

通讯作者: 康飞宇，教授，博士生导师. Tel/Fax: +86-755-2603-6118

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出版历程

The effect of the microstructure of mesophase-pitch-based activated carbons on their electrochemical performance for electric double layer capacitors

Author Bio: LI Bao-hua(1974-), male, Associate Professor, engaged in the research of the electrode materials of lithium ion battery and electrochemical capacitor. E-mail: libh@mail.sz.tsinghua.edu.cn

Corresponding author: KANG Fei-yu, Professor. Tel/Fax: +86-755-2603-6118

计量

出版历程

目录

作者简介:
李宝华（1974-）|男|山东临沭人,博士|副教授,硕士生导师,主要从事锂离子电池和电化学电容器电极材料研究. E-mail: libh@mail.sz.tsinghua.edu.cn

通讯作者:
康飞宇，教授，博士生导师. Tel/Fax: +86-755-2603-6118

Author Bio:
LI Bao-hua(1974-), male, Associate Professor, engaged in the research of the electrode materials of lithium ion battery and electrochemical capacitor. E-mail: libh@mail.sz.tsinghua.edu.cn