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작성일 : 17-03-22 16:25
Titanium carbide wire type solid state supercapacitors_JMC A (IF:8.3)
 글쓴이 : supervisor
조회 : 1,002  
   2017_Karthi_JMCA_TitaniumCarbideWiretypeSC.pdf (1.4M) [1] DATE : 2017-03-22 16:25:09
Titanium carbide sheet based high performance wire type solid state supercapacitors†
        Karthikeyan Krishnamoorthy, Parthiban Pazhamalai, Surjit Sahoo, and Sang-Jae Kim
        J. Mater. Chem. A, 2017, 5, 5726–5736

Two dimensional sheets based on transition metal carbides have attracted much attention in
electrochemical energy storage sectors. In this work, we demonstrated the fabrication and performance
of titanium carbide based wire type supercapacitors (WSCs) towards next generation energy storage
devices. The layered titanium carbide sheets were prepared via selective extraction of Al from the
precursor Ti2AlC using hydrofluoric acid and are extensively characterized using X-ray diffraction, field
emission scanning electron microscopy, high resolution transmission electron microscopy, Fourier
transform-infrared spectroscopy, and laser Raman spectral analyses, respectively. The X-ray
photoelectron spectroscopy studies confirmed the presence of oxygen and fluorinated functional
groups attached on the surface of titanium carbide. The electrochemical studies of the fabricated
titanium carbide WSC devices showed ideal capacitive properties with a specific length capacitance of
3.09 mF cm1 (gravimetric capacitance of about 4.64 F g1), and specific energy density of about 210
nW h cm1 (in length) or 315 mW h kg1 (in gravimetric) with excellent cycling stability. Further,
a detailed examination of the capacitive and charge-transfer behavior of titanium carbide WSCs has been
investigated via electrochemical impedance analysis using Nyquist and Bode plots. Additionally, we have
also demonstrated the practical application of the titanium carbide WSCs, highlighting the path for their
huge potential in energy storage and management sectors.