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Title: Carbon coated nano-LiTi 2(PO 4) 3 electrodes for non-aqueous hybrid supercapacitors
Authors: Aravindan, V.
Chuiling, W.
Reddy, M.V. 
Rao, G.V.S.
Chowdari, B.V.R. 
Madhavi, S.
Issue Date: 28-Apr-2012
Citation: Aravindan, V., Chuiling, W., Reddy, M.V., Rao, G.V.S., Chowdari, B.V.R., Madhavi, S. (2012-04-28). Carbon coated nano-LiTi 2(PO 4) 3 electrodes for non-aqueous hybrid supercapacitors. Physical Chemistry Chemical Physics 14 (16) : 5808-5814. ScholarBank@NUS Repository.
Abstract: The Pechini type polymerizable complex decomposition method is employed to prepare LiTi 2(PO 4) 3 at 1000 °C in air. High energy ball milling followed by carbon coating by the glucose-method yielded C-coated nano-LiTi 2(PO 4) 3 (LTP) with a crystallite size of 80(±5) nm. The phase is characterized by X-ray diffraction, Rietveld refinement, thermogravimetry, SEM, HR-TEM and Raman spectra. Lithium cycling properties of LTP show that 1.75 moles of Li (∼121 mA h g -1 at 15 mA g -1 current) per formula unit can be reversibly cycled between 2 and 3.4 V vs. Li with 83% capacity retention after 70 cycles. Cyclic voltammograms (CV) reveal the two-phase reaction mechanism during Li insertion/extraction. A hybrid electrochemical supercapacitor (HEC) with LTP as negative electrode and activated carbon (AC) as positive electrode in non-aqueous electrolyte is studied by CV at various scan rates and by galvanostatic cycling at various current rates up to 1000 cycles in the range 0-3 V. Results show that the HEC delivers a maximum energy density of 14 W h kg -1 and a power density of 180 W kg -1. © the Owner Societies 2012.
Source Title: Physical Chemistry Chemical Physics
ISSN: 14639076
DOI: 10.1039/c2cp40603a
Appears in Collections:Staff Publications

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