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Mesoporous Perforated Co3O4 Nanoparticles with a Thin Carbon Layer for High Performance Li-ion Battery Anodes
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- Authors
- Ji Sun Park, Dong Ok Shin, Churl Seung Lee, Young-Gi Lee, Ju Young Kim, Kwang Man Kim, Kwonwoo Shin
- Issue Date
- 2018-02
- Citation
- Electrochimica Acta, v.264, pp.376-385
- ISSN
- 0013-4686
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Project Code
- 17HB1900, Development of Shape/Function-controllable ICT Convergent Materials/Components for Next-generation Mobilities, Lee Kyu Sung
- Abstract
- A facile method for preparing mesoporous perforated Co3O4 nanoparticles with hollow channels and a thin carbon layer was newly designed and achieved with sacrificial carbon nanotube (CNT) templates. The threaded Co3O4 nanoparticles on the CNTs were fabricated through a hybridization process, and a subsequent calcination process produced mesoporous perforated Co3O4 nanoparticles. With a finely tuned calcination, CNTs were sacrificed to generate hollow channels in the Co3O4 nanoparticles and to provide a carbon source for the formation of a few nm-thick carbon layer on the surface of the Co3O4 nanoparticles simultaneously. The prepared mesoporous perforated Co3O4 nanoparticles with a robust electronic conductive layer enabled not only an enhanced electrochemical reactivity from the greatly increased contact area between the electrolyte and electrode but also a high electronic conductivity of the overall electrode so that excellent electrochemical performances (1115.1 mA h g?닋1 after 100 cycles; 595.9 mA h g?닋1 @ 5 C rate) were successfully achieved in the anode application of a lithium-ion battery.
- KSP Keywords
- Calcination process, Carbon layer, Carbon nano-tube(CNT), Carbon source, Conductive layer, Contact area, Electrochemical performance, Electrochemical reactivity, Facile method, High performance, Hollow channels