Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 31, Pages 16026-16031Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm32970k
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Funding
- National Research Foundation (NRF, Singapore) through the Competitive Research Programme (CRP) [NRF-CRP4-2008-03]
- Clean Energy Research Project (CERP) [NRF-2009-EWT-CERP001-036]
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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 (similar to 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 MLiPF6 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.
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