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Controllable preparation of Co₃O₄ nanosheets and their electrochemical performance for Li-ion batteries
- Hao, Qin, Li, Menghua, Jia, Suzhen, Zhao, Xiaoyun, Xu, Caixia
- RSC advances 2013 v.3 no.21 pp. 7850-7854
- alloys, ambient temperature, anodes, coal, cobalt, cobalt oxide, electrochemistry, lithium batteries, nanosheets
- Co₃O₄ nanosheets were prepared by selectively dealloying CoAl alloys at room temperature, and their thicknesses could be easily controlled to be ∼6 nm, ∼100 nm and ∼500 nm. Then they were employed as anodes for lithium-ion batteries to study the electrochemical performance as a function of the thickness of the nanosheets. The results showed that the thinner they were, the better performance they presented, especially at high current density. Thereinto, the obtained ∼6 nm-thick Co₃O₄ sheets demonstrated an initial capacity of 1259.5 mA h g⁻¹ as well as an excellent capacity stability.