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Pyrene-Anderson-Modified CNTs as Anode Materials for Lithium-Ion Batteries
Lujiang Huang1, Jun Hu1, Yuanchun Ji1
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029 Beijing (P. R. China), Fax: (+86) 10-64411832.
Abstract:
An organo-functionalized polyoxometalate (POM)-pyrene hybrid (Py-Anderson) has been used for noncovalent functionalization of carbon nanotubes (CNTs) to give a Py-Anderson-CNT nanocomposite through π-π interactions. The as-synthesized nanocomposite was used as the anode material for lithium-ion batteries, and shows higher discharge capacities and better rate capacity and cycling stability than the individual components. When the current density was 0.5 mA cm(-2), the nanocomposite exhibited an initial discharge capacity of 1898.5 mA h g(-1) and a high discharge capacity of 665.3 mA h g(-1) for up to 100 cycles. AC impedance spectroscopy provides insight into the electrochemical properties and the charge-transfer mechanism of the Py-Anderson-CNTs electrode.
