The effect of carbonyl, carboxyl and hydroxyl groups on the capacitance of carbon nanotubes
文献类型：期刊论文
| 作者 | L. X. Li ; F. Li |
| 刊名 | New Carbon Materials
 |
| 出版日期 | 2011 |
| 卷号 | 26期号:3页码:224-228 |
| 关键词 | Carbon nanotubes Carbonyl Carboxyl Hydroxyl Pseudo-capacitance double-layer capacitance activated carbon electrodes oxygen supercapacitors purification oxidation sensors |
| ISSN号 | 1007-8827 |
| 中文摘要 | Concentrated H(2)SO(4):HNO(3) mixed acids, air, nitric acid and potassium permanganate were used to oxidize carbon nanotubes (CNTs) to introduce surface functional groups (SFGs) and the effects of the type and amount of SFGs on the electrochemical properties of CNT supercapacitors were investigated. XPS analysis shows that the mixed acid oxidation produces carbonyl (C=O) and the carboxyl (O-C=O) groups, the air oxidation results in hydroxyl and the smallest amount of carbonyl and carboxyl groups, and both the nitric acid and potassium permanganate treatments result in a moderate amount of carbonyl and carboxyl groups. It was found that the specific surface area and pore structures of the four samples are similar and carbonyl and carboxyl groups contribute the most to pseudo-capacitance through a Faradic reaction. In particular, the carbonyl group has a proportional relationship to the capacitance of CNTs. However, the hydroxyl group does not lead to an obvious increase of pseudo-capacitance, but can increase the electric double layer capacitance. The carbonyl and the carboxyl groups are advantageous for fast Faradic reactions to introduce pseudo-capacitance, owing to their lower charge transfer resistance than that of the hydroxyl group. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/30474]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | L. X. Li,F. Li. The effect of carbonyl, carboxyl and hydroxyl groups on the capacitance of carbon nanotubes[J]. New Carbon Materials,2011,26(3):224-228. |
| APA | L. X. Li,&F. Li.(2011).The effect of carbonyl, carboxyl and hydroxyl groups on the capacitance of carbon nanotubes.New Carbon Materials,26(3),224-228. |
| MLA | L. X. Li,et al."The effect of carbonyl, carboxyl and hydroxyl groups on the capacitance of carbon nanotubes".New Carbon Materials 26.3(2011):224-228. |
入库方式： OAI收割
来源：金属研究所
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