期刊
CHEMSUSCHEM
卷 7, 期 7, 页码 1881-1887出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201400148
关键词
hybrid materials; interfaces; nickel cobaltate; nanostructures; supercapacitors
资金
- National Natural Science Foundation of China [21353003]
- Special Innovation Talents of Harbin Science and Technology [2013RFQXJ145]
- Fundamental Research Funds of the Central University (HEUCFZ)
- Natural Science Foundation of Heilongjiang Province [B201316]
- International S&T Cooperation special project [2013DFA50480]
Pseudocapacitors bridge the gap between supercapacitors and batteries. Controllable microstructures grown on substrates have achieved success with regard to energy storage. However, traditional designs have only focused on the surface of scaffolds, which results in high specific capacitance values for the electroactive material rather than the electrodes. Inspired by slurry-casting, a dual-scale shell-structured NiCo2O4 on nickel foam was assembled by using a simple and flexible solution-based strategy. First, NiCo2O4 nanosheets covering the Ni foam skeleton surface loosely (the sample is denoted as 'pasted') is obtained by a solution-grown and 'dip-and-dry' process (in a cobalt-nickel hydroxide solution) followed by annealing. Secondly, the NiCo2O4 nanosheets are filled in the pores of the Ni scaffold (the obtained material is denoted as 'tailored') through chemical bath deposition process followed by annealing. The capacitance per weight of electroactive materials is not outstanding (1029 Fg(-1) at 10 mAcm(-2)), but is competitive with regard to area (3.23 Fcm(-2) at 10 mAcm(-2)). However, features in the cycling performance imply that the electrode exhibits a hybrid supercapacitor-battery behavior and that thermodynamic hysteresis promotes the 'breaking' and 'fusing' behavior of the material. The overall design highlights a new pathway to step out from surface to space.
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