High-Energy MnO(2) Nanowire/Graphene and Graphene Asymmetric Electrochemical Capacitors
文献类型：期刊论文
| 作者 | Z. S. Wu ; W. C. Ren ; D. W. Wang ; F. Li ; B. L. Liu ; H. M. Cheng |
| 刊名 | Acs Nano
 |
| 出版日期 | 2010 |
| 卷号 | 4期号:10页码:5835-5842 |
| 关键词 | graphene manganese oxide composite asymmetric electrochemical capacitor activated carbon aqueous-electrolyte composite electrodes manganese-dioxide layer capacitor 2 v supercapacitors storage performance intercalation |
| ISSN号 | 1936-0851 |
| 中文摘要 | In order to achieve high energy and power densities, we developed a high-voltage asymmetric electrochemical capacitor (EC) based on graphene as negative electrode and a MnO(2) nanowire/graphene composite (MGC) as positive electrode in a neutral aqueous Na(2)SO(4) solution as electrolyte. MGC was prepared by solution-phase assembly of graphene sheets and alpha-MnO(2) nanowires. Such aqueous electrolyte-based asymmetric ECs can be cycled reversibly in the high-voltage region of 0-2.0 V and exhibit a superior energy density of 30.4 Wh kg(-1), which is much higher than those of symmetric ECs based on graphene//graphene (2.8 Wh kg(-1)) and MGC//MGC (5.2 Wh kg(-1)). Moreover, they present a high power density (5000 W kg(-1) at 7.0 Wh kg(-1)) and acceptable cycling performance of similar to 79% retention after 1000 cycles. These findings open up the possibility of graphene-based composites for applications in safe aqueous electrolyte-based high-voltage asymmetric ECs with high energy and power densities. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31590]  |
| 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 | Z. S. Wu,W. C. Ren,D. W. Wang,et al. High-Energy MnO(2) Nanowire/Graphene and Graphene Asymmetric Electrochemical Capacitors[J]. Acs Nano,2010,4(10):5835-5842. |
| APA | Z. S. Wu,W. C. Ren,D. W. Wang,F. Li,B. L. Liu,&H. M. Cheng.(2010).High-Energy MnO(2) Nanowire/Graphene and Graphene Asymmetric Electrochemical Capacitors.Acs Nano,4(10),5835-5842. |
| MLA | Z. S. Wu,et al."High-Energy MnO(2) Nanowire/Graphene and Graphene Asymmetric Electrochemical Capacitors".Acs Nano 4.10(2010):5835-5842. |
入库方式： OAI收割
来源：金属研究所
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