稻壳基介孔炭的制备及其在超级电容器中的应用

吴明铂; 李玲燕; 刘军; 李杨; 艾培培; 吴文婷; 郑经堂

doi:10.1016/S1872-5805(15)60201-3

稻壳基介孔炭的制备及其在超级电容器中的应用

doi: 10.1016/S1872-5805(15)60201-3

1.
中国石油大学重质油国家重点实验室, 山东青岛 266580;
2.
中建安装工程有限公司, 江苏南京 210046

基金项目: 国家自然科学基金(51172285, 51372277, 21302224);中央高校基本科研业务费专项资金(CX-1217, 14CX06045A, 14CX02060A).

详细信息

作者简介:
吴明铂,教授,博士.E-mail:wumb@upc.edu.cn.

中图分类号: TQ127.1⁺1
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出版历程
- 收稿日期: 2015-04-05
- 录用日期: 2015-11-10
- 修回日期: 2015-09-28
- 刊出日期: 2015-10-28

Template-free preparation of mesoporous carbon from rice husks for use in supercapacitors

1.
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China;
2.
China Construction Installation Engineering Co., Ltd, Nanjing 210046, China

Funds: National Natural Science Foundation of China(51172285,51372277,21302224);Fundamental Research Funds for the Central Universities(CX-1217,14CX06045A,14CX02060A).

摘要

摘要: 以量大价廉的稻壳为原料,先后经NaOH脱硅处理、预氧化、磷酸活化,在无模板的情况下制备出介孔炭材料。NaOH脱硅处理可有效除去稻壳中的硅并破坏纤维素的晶体结构,脱硅过程中形成的孔隙亦有利于高比表面积和高中孔率介孔炭的制备。所制介孔炭比表面积和中孔率分别高达2 009 m²·g^-1和90.8%。其在50 mA·g^-1电流密度下的比电容达176 F·g^-1,即使在1 000 mA·g^-1的大电流下,其比电容仍保持在126 F·g^-1,表现出优异的倍率能力。所制介孔炭具有良好的循环稳定性,在200·mA g^-1电流密度下的比电容高达150 F·g^-1, 1 000次循环无容量衰减。稻壳基介孔炭在超级电容器领域具有良好的应用前景。
- 稻壳 /
- 介孔炭 /
- 碱预处理 /
- 超级电容器
Abstract: Mesoporous carbon (MC) was prepared from rice husk (RH) by a simple and template-free method which combines H₃PO₄ activation with a pretreatment of the RH with a NaOH solution and pre-oxidation in air. The pretreatment of RH with NaOH removes silicon and damages the crystal structure of the cellulose in the RH, both of which are beneficial to the preparation of MC with a high surface area and high mesoporosity. The MC has a specific surface area of 2 009 m²·g^-1 and a mesoporosity of 90.8%. Its specific capacitance can reach 176 F·g^-1 at a current density of 50 mA·g^-1, and a value of 126 F·g^-1 is retained at 1 000 mA·g^-1, indicating an excellent rate capability. A MC electrode has a stable specific capacitance of about 150 F/g at 200 mA·g^-1 with no apparent capacitance fade after 1 000 cycles, indicating good electrochemical stability.
- Rice husk /
- Mesoporous carbon /
- Alkali pretreatment /
- Supercapacitor

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参考文献(20)

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