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- Title
Mesoporous three dimension NiCoO/graphene composites fabricated by self-generated sacrificial template method for a greatly enhanced specific capacity.
- Authors
Yao, Mengqi; Wang, Ni; Yin, Jialin; Hu, Wencheng
- Abstract
We reported a facile self-generated sacrificial template method for fabricating mesoporous three dimension NiCoO/graphene electrode material. Nickel, cobalt, and zinc ions dissolved in ethylene glycol reacted with potassium hydroxide solution to co-deposit onto graphene at 140 °C under atmospheric environment. With further addition of potassium hydroxide, zinc hydroxide as a self-generated sacrificial template was dissolved in situ, leading to the formation of mesoporous morphology. Structure and morphology characteristics were determined by X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, and N adsorption experiments. Electrochemical properties were analyzed by AC impedance spectroscopy, cycling voltammetry, and charge/discharge test in 2 M KOH. Results showed that the as-prepared NiCoO/graphene electrode possessed a large specific surface area of 281.4 m g, an ultrahigh specific capacity of 1024.99 and 662.12 C g at current density of 1 and 50 A g respectively, and a long-term cycling life of 10,000 charge/discharge tests.
- Subjects
MESOPOROUS materials; ETHYLENE glycol derivatives; POTASSIUM hydroxide; X-ray diffraction; SCANNING electron microscopy
- Publication
Journal of Materials Science: Materials in Electronics, 2017, Vol 28, Issue 15, p11119
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-017-6898-2