期刊
NANOSCALE
卷 6, 期 12, 页码 6772-6781出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr00771a
关键词
-
类别
资金
- National Natural Science Foundation of China [50972091]
- Shanghai Municipal Science & Technology Commission key supporting project [12120502900]
- industrial research fund from Wuhu Token Sciences Co., Ltd.
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
We report a facile strategy to prepare 3D core-shell nanowire heterostructures with microporous hydrogenated CoOx (H-CoOx) nanowires as the conducting scaffold to support Ni(OH)(2) nanosheets. Benefiting from the H-CoOx nanowire core to provide the effective pathway for charge transport and the core-shell heterostructures with synergistic effects, the H-CoOx@Ni(OH)(2) core-shell nanowire electrode achieved the specific capacitance of 2196 F g(-1) (areal capacitance of 5.73 F cm(-2)), which is approximately a 1.4-fold enhancement compared with the Co3O4@Ni(OH)(2) core-shell nanowires. An aqueous asymmetric supercapacitor (ASC) device was fabricated by using H-CoOx@Ni(OH)(2) nanowires as the positive electrode and reduced graphene oxide @Fe3O4 nanocomposites as the negative electrode. The ASCs achieved high energy density (similar to 45.3 W h kg(-1) at 1010 W kg(-1)), high power density (similar to 7080 W kg(-1) at 23.4 W h kg(-1)) and high cycling stability. Furthermore, after charging for similar to 1 min, one such 22 cm(2) ASC device demonstrated to be able to drive a small windmill (0.8 V, 0.1 W) for 20 min. Two such ASCs connected in series can power up a seven-color LED (3.2 V) efficiently.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据