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Fabrication of NiO-ZnO/RGO composite as an anode material for lithium-ion batteries
- Source :
- Ceramics International. 44:22664-22670
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- NiO-ZnO/RGO composite was obtained by the annealing of an Ni (OH) 2 -Zn (OH) 2 /RGO precursor, which has been fabricated by in situ ultrasonic agitation. Moreover, the NiO-ZnO nanoflakes are evenly distributed on the RGO sheets based on the scanning electron microscope (SEM) and transmission electron microscope (TEM) characterization results. When the NiO-ZnO/RGO composite was used as an anode material in lithium-ion batteries (LIBs), the electrodes exhibited a high reversible capacity of 1017 mA h/g at a current density of 100 mA/g after 200 cycles and a specific capacity of 458 mA h/g at 500 mA/g even after 400 cycles. The electrode even reached a capacity of 185 mA h/g at a current density of 2000 mA/g. The excellent electrochemical properties of the NiO-ZnO/RGO composite might be attributable to the NiO-ZnO nanoflakes offering rich electrochemical reaction sites and shortening the diffusion length for lithium ion (Li + ), as well as the RGO sheets improving the transfer rates of Li + and electron during the charge-discharge process.
- Subjects :
- Materials science
Scanning electron microscope
Annealing (metallurgy)
Process Chemistry and Technology
Non-blocking I/O
Composite number
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Anode
Chemical engineering
Transmission electron microscopy
Electrode
Materials Chemistry
Ceramics and Composites
0210 nano-technology
Subjects
Details
- ISSN :
- 02728842
- Volume :
- 44
- Database :
- OpenAIRE
- Journal :
- Ceramics International
- Accession number :
- edsair.doi...........40b99bc293b54cc6f1261a2b18d8cc6a