Hybrid supercapacitor with nano-TiP2O7 as intercalation electrode
Reddy, M. V.
Mhaisalkar, Subodh Gautam
Rao, G. V. Subba
Chowdari, Bobba V. R.
Date of Issue2011
School of Materials Science and Engineering
Nano-size (≤ 100 nm) TiP2O7 is prepared by the urea assisted combustion synthesis, at 450 oC and 900 oC. The compound is characterized by powder X-ray diffraction, Rietveld refinement, high resolution transmission electron microscopy and surface area methods. Lithium cycling properties by way of galvanostaic cycling and cyclic voltammetry (CV) showed a reversible and stable capacity of 60 (± 3) mAh g–1 (0.5 mole of Li) up to 100 cycles, when cycled at 15 mA g–1 between 2-3.5 V vs. Li. Non-aqueous hybrid supercapacitor, TiP2O7 (as anode) and activated carbon (AC) (as cathode) has been studied by galvanostatic cycling and CV in the range, 0-3 V at 31 mA g–1 and exhibited a specific discharge capacitance of 29 (± 1) F g–1stable in the range, 100-500 cycles. The Ragone plot shows a deliverable maximum of 13 Wh kg–1 and 371 W kg–1 energy and power density, respectively.
DRNTU::Engineering::Materials::Microelectronics and semiconductor materials
Journal of power sources
© 2011 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Power Sources, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: http://dx.doi.org/10.1016/j.jpowsour.2011.05.074.