Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Vanadium Oxide Nanomaterials Prepared Using Urea and Formic Acid as Cathodes for Lithium Batteries

우레아 및 포름산을 이용한 바나듐 산화물 나노소재의 합성 및 전기화학적 특성

  • Park, Su-Jin (Department of Applied Chemistry, Kyungpook National University) ;
  • Lee, Man-Ho (Department of Applied Chemistry, Kyungpook National University) ;
  • Park, Heai-Ku (Department of Chemical System Engineering, Keimyung University)
  • 박수진 (경북대학교 공과대학 응용화학과) ;
  • 이만호 (경북대학교 공과대학 응용화학과) ;
  • 박희구 (계명대학교 공과대학 화학시스템공학과)
  • Received : 2009.12.30
  • Accepted : 2010.01.22
  • Published : 2010.04.10
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Abstract

$(NH_4)_{0.3}V_2O_5$ nanorods and $V_2O_5$ nanosheets have been synthesized by the reaction of $V_2O_5$ gel via homogeneous precipitation process employing urea and formic acid. The electrochemical and chemical characteristics of these nanomaterials have been investigated using TGA, SEM, FT-IR, XRD, and LSV. The interlayer distance of $(NH_4)_{0.3}V_2O_5$ was about $10.7{\AA}$, and that of $V_2O_5$ synthesized by using formic acid was $14.2{\AA}$. The surface morphology of $(NH_4)_{0.3}V_2O_5$ and $V_2O_5$ showed features that looked like nanorods and nanosheets, respectively. Specific capacity of $(NH_4)_{0.3}V_2O_5$ nanorods prepared at $95^{\circ}C$ was at least 280 mAh/g at 10 mA/g discharge rate.

우레아와 포름산을 이용한 균일침전법으로 $(NH_4)_{0.3}V_2O_5$ 및 $V_2O_5$ 나노소재를 합성한 후 TGA, SEM, FT-IR, XRD, 선형 전압전류법 등을 이용하여 물성과 전기화학적 특성을 조사하였다. 평균 층간 거리는 우레아 첨가 유무에 따라 $10.7{\AA}$, $14.2{\AA}$로 각각 나타났다. 또한 표면구조는 합성 시 우레아가 첨가된 소재는 나노로드, 포름산만 첨가된 시료는 나노쉬트 모양의 단위체가 형성되었다. $95^{\circ}C$에서 우레아를 첨가하여 제조한 $(NH_4)_{0.3}V_2O_5$ 나노소재의 전지용량은 평균 280 mAh/g 이상이었다.

Keywords

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