화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.47, 187-193, March, 2017
DOI10.1016/j.jiec.2016.11.030  Export Citation
Enhancement of the electrochemical capacitance of TiOF2 obtained via control of the crystal structure
Min-Jung Jung, Yesol Kim, and Young-Seak Lee†
  • Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
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TiOF2 was successfully prepared as an electrochemical capacitor electrode material by novel method, which is NF3 treatment of a TiO2 precursor at controlled reaction temperatures to modulate its structure and surface properties. The crystal phase of TiOF2 changed to fluorine-doped anatase TiO2 upon increasing the NF3 treatment temperature. This structural change was induced to reduce the Ti3+ ratio of the TiOF2 surface. The specific capacitance of the TiOF2 phase treated by fluorination with NF3 gas at 580 °C was sevenfold higher than that of anatase TiO2 in this study. The enhanced capacitance of TiOF2 is expected to lead to a higher conductivity and charge transfer of the TiOF2 phase in comparison to anatase TiO2, which is primarily attributed to the higher Ti3+ ratio.
Keywords:TiOF2;NF3;Crystal structure;Electrochemical capacitance
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