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- Title
Synthesis of carbon-coated CoO composite with dendrite-like morphology and its electrochemical performance for lithium-ion batteries.
- Authors
Zhou, Shibo; Wang, Gang; Xie, Yinzhi; Wang, Hui; Bai, Jinbo
- Abstract
Carbon-coated CoO microparticles (CoO@C) with dendrite-like morphology are prepared by a low-temperature hydrothermal method and subsequent CH chemical vapor deposition (CVD) for the first time. The synthesized precursor CoO has a size of 8-10 μm, which is assembled by lots of aligned CoO wire with 4-5 μm in length. After carbon coating, CoO microparticles were proved to be coated in amorphous carbon of ~10 nm. A plausible formation process of the dendrite-like CoO and CoO@C is proposed based on the morphology and structure characterizations of the materials. As an anode material for lithium-ion batteries, the CoO@C composite electrode exhibits higher reversible capacity and better cycling performance than the unmodified CoO electrode. The reversible capacity of the CoO@C composite after 40 cycles is 500 mAh g, much higher than that of CoO (148 mAh g). Electrochemical impedance spectra and cyclic voltammogram indicate that the carbon layer coated on CoO by CVD can improve the electrochemical activity and enhance the reversibility of CoO during charge/discharge cycles.
- Subjects
COBALT oxides; LITHIUM-ion batteries; ELECTROCHEMICAL analysis; CHEMICAL vapor deposition; ANODES
- Publication
Journal of Nanoparticle Research, 2013, Vol 15, Issue 6, p1
- ISSN
1388-0764
- Publication type
Article
- DOI
10.1007/s11051-013-1740-0