| High-Energy MnO2 Nanowire/Graphene and Graphene Asymmetric Electrochemical Capacitors | |
| Wu, Zhong-Shuai1; Ren, Wencai1; Wang, Da-Wei2; Li, Feng1; Liu, Bilu1; Cheng, Hui-Ming1 | |
| 通讯作者 | Ren, Wencai(wcren@imr.ac.cn) |
| 2010-10-01 | |
| 发表期刊 | ACS NANO
 |
| ISSN | 1936-0851 |
| 卷号 | 4期号:10页码:5835-5842 |
| 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 MnO2 nanowire/graphene composite (MGC) as positive electrode in a neutral aqueous Na2SO4 solution as electrolyte. MGC was prepared by solution-phase assembly of graphene sheets and alpha-MnO2 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. |
| 关键词 | graphene manganese oxide composite asymmetric electrochemical capacitor |
| 资助者 | Ministry of Science and Technology of China ; National Science Foundation of China ; Chinese Academy of Sciences |
| DOI | 10.1021/nn101754k |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Ministry of Science and Technology of China[2006CB932703] ; National Science Foundation of China[50872136] ; National Science Foundation of China[50921004] ; National Science Foundation of China[50632040] ; Chinese Academy of Sciences[KJCX2-YW-231] |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| WOS类目 | Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| WOS记录号 | WOS:000283453700048 |
| 出版者 | AMER CHEMICAL SOC |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/103121 |
| 专题 | 中国科学院金属研究所 |
| 通讯作者 | Ren, Wencai |
| 作者单位 | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Queensland, ARC Ctr Excellence Funct Nanomat, AIBN, Brisbane, Qld 4072, Australia |
| 推荐引用方式 GB/T 7714 | Wu, Zhong-Shuai,Ren, Wencai,Wang, Da-Wei,et al. High-Energy MnO2 Nanowire/Graphene and Graphene Asymmetric Electrochemical Capacitors[J]. ACS NANO,2010,4(10):5835-5842. |
| APA | Wu, Zhong-Shuai,Ren, Wencai,Wang, Da-Wei,Li, Feng,Liu, Bilu,&Cheng, Hui-Ming.(2010).High-Energy MnO2 Nanowire/Graphene and Graphene Asymmetric Electrochemical Capacitors.ACS NANO,4(10),5835-5842. |
| MLA | Wu, Zhong-Shuai,et al."High-Energy MnO2 Nanowire/Graphene and Graphene Asymmetric Electrochemical Capacitors".ACS NANO 4.10(2010):5835-5842. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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