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Title: High power lithium-ion hybrid electrochemical capacitors using spinel LiCrTiO4 as insertion electrode
Authors: Aravindan, Vanchiappan
Chuiling, W.
Madhavi, Srinivasan
Keywords: DRNTU::Engineering::Materials
Issue Date: 2012
Source: Aravindan, V., Chuiling, W., & Madhavi, S. (2012). High power lithium-ion hybrid electrochemical capacitors using spinel LiCrTiO4 as insertion electrode. Journal of Materials Chemistry, 22(31), 16026-16031.
Series/Report no.: Journal of materials chemistry
Abstract: We report the synthesis and electrochemical performance of sub-micron size LiCrTiO4 particles prepared by a solid-state approach. X-ray diffraction and transmission electron microscopic studies are used to analyze the structural and morphological properties, respectively, of the synthesized powders. Electrochemical Li-insertion properties are evaluated in half-cell configurations (Li/LiCrTiO4) by means of both galvanostatic and potentiostatic modes between 1 and 2.5 V vs. Li. Reversible insertion of almost one mole of lithium (155 mA h g−1) is noted at a low current rate of 15 mA g−1 and rendered an excellent cycling profile as well. A non-aqueous Li-ion electrochemical hybrid capacitor (Li-HEC) is fabricated with an optimized mass loading of activated carbon (AC) cathode and synthesized LiCrTiO4 as anode in 1 M LiPF6 in ethylene carbonate–diethyl carbonate solution and cycled between 1 and 3 V under ambient conditions. The Li-HEC delivered maximum specific energy and power densities of 23 W h kg−1 and 4 kW kg−1, respectively.
DOI: 10.1039/c2jm32970k
Rights: © 2012 The Royal Society of Chemistry.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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