우레아 및 포름산을 이용한 바나듐 산화물 나노소재의 합성 및 전기화학적 특성

박수진; 이만호; 박희구; Su-Jin Park; Man-Ho Lee; Heai-Ku Park

Applied Chemistry for Engineering, Vol.21, No.2, 211-216, April, 2010

Export Citation

우레아 및 포름산을 이용한 바나듐 산화물 나노소재의 합성 및 전기화학적 특성

Vanadium Oxide Nanomaterials Prepared Using Urea and Formic Acid as Cathodes for Lithium Batteries

박수진, 이만호 , 박희구 ^{1, †}

경북대학교 공과대학 응용화학과
¹계명대학교 공과대학 화학시스템공학과

Su-Jin Park, Man-Ho Lee , and Heai-Ku Park^{1, †}

Department of Applied Chemistry, Kyungpook National University, Daegu 702-701, Korea
¹Department of Chemical System Engineering, Keimyung University, Daegu 704-701, Korea

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초록

우레아와 포름산을 이용한 균일침전법으로 (NH4)0.3V2O5 및 V2O5 나노소재를 합성한 후 TGA, SEM, FT-IR, XRD, 선형 전압전류법 등을 이용하여 물성과 전기화학적 특성을 조사하였다. 평균 층간 거리는 우레아 첨가 유무에 따라 10.7Å, 14.2 Å로 각각 나타났다. 또한 표면구조는 합성 시 우레아가 첨가된 소재는 나노로드, 포름산만 첨가된 시료는 나노쉬트 모양의 단위체가 형성되었다. 95 ℃에서 우레아를 첨가하여 제조한 (NH4)0.3V2O5 나노소재의 전지용량은 평균 280 mAh/g 이상이었다.

(NH4)0.3V2O5 nanorods and V2O5 nanosheets have been synthesized by the reaction of V2O5 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 (NH4)0.3V2O5 was about 10.7 Å, and that of V2O5 synthesized by using formic acid was 14.2 Å. The surface morphology of (NH4)0.3V2O5 and V2O5 showed features that looked like nanorods and nanosheets, respectively. Specific capacity of (NH4)0.3V2O5 nanorods prepared at 95 ℃ was at least 280 mAh/g at 10 mA/g discharge rate.

Keywords:lithium battery cathode;ammonium vanadium oxides;vanadium oxides

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[Related Articles]

[1] OZIN GA, Adv. Mater., 4(10), 612 (1992)

[2] lijima S, Nature, 56, 354 (1991)

[3] Cheetham AK, Grubstein PSH, Mater. Today, 6, 16 (2003)

[4] Abraham KM, Electrochim. Acta, 38, 1233 (1993)

[5] Guyomard D, Tarascon JM, J. Electrochem. Soc., 139, 937 (1992)

[6] Manev V, Momchilov A, Nassalevska A, Kozawa A, J. Power Source, 41, 305 (1993)

[7] Ajayan PM, Stephan O, Redlich P, Colliex C, Nature, 375(6532), 564 (1995)

[8] Pillai KS, Krumeich F, Muhr HJ, Niederberger M, Nesper R, Solid State Ionics, 185, 141 (2001)

[9] Li HX, Jiao KF, Yuan HT, Zhang M, Guo J, Wang LQ, Zhao M, Wang YM, Electrochem. Communications, 8, 1693 (2006)

[10] Fontenot CJ, Wiench JW, Pruski M, Schrader GL, J. Phys. Chem. B, 104(49), 11622 (2000)

[11] Shaw WHR, Bordeaux J, J. Am. Chem. Soc., 77, 4729 (1955)

[12] Subrt J, Stengl V, Bakardjieva S, Szatmary L, Powder Technol., 169(1), 33 (2006)

[13] Liu P, Moudrakovski IL, Liu J, Sayari A, Chem. Mater., 9, 2513 (1997)

[14] Park HK, Smyrl WH, Ward MD, J. Electrochem. Soc., 142(4), 1068 (1995)