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Synthesis of cobalt oxide-reduced graphene nanocomposite and its enhanced electrochemical properties as negative material for alkaline secondary battery
- Source :
- Journal of Power Sources. 272:328-334
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- A potential negative electrode material Co3O4@rGO is synthesized via a facile reflux condensation route. The electrochemical performances of Co3O4@rGO composite for alkaline rechargeable Ni/Co batteries have been systemically investigated for the first time. The reduced-graphene can remarkably enhance the electrochemical activity of Co3O4 materials, leading to a notable improvement of discharge capacity, cycle stability and rate capability. Interestingly, the maximum discharge capacity of Co3O4@rGO-20 (additive amount of GO is 20 mg) electrode can reach 511.4 mAh g−1 with the capacity retention of 89.1% after 100 cycles at a discharge current of 100 mA g−1. A properly electrochemical reaction mechanism of Co3O4@rGO electrode is also constructed in detail.
- Subjects :
- Battery (electricity)
Materials science
Nanocomposite
Renewable Energy, Sustainability and the Environment
Graphene
Inorganic chemistry
Energy Engineering and Power Technology
Electrochemistry
Anode
law.invention
Electrochemical reaction mechanism
law
Electrode
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
Cobalt oxide
Subjects
Details
- ISSN :
- 03787753
- Volume :
- 272
- Database :
- OpenAIRE
- Journal :
- Journal of Power Sources
- Accession number :
- edsair.doi...........e1325dd8bacd0bd53923b65696530c3c