ZnxV2O5 xerogel 양극의 리튬이차전지 특성

이정윤; 박희구; Jung-Youn Lee; Heai-Ku Park

Journal of the Korean Industrial and Engineering Chemistry, Vol.15, No.3, 278-282, May, 2004

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Zn_xV₂O₅ xerogel 양극의 리튬이차전지 특성

Zn_0.10V₂O₅ xerogel Cathodes for Lithium Secondary Batteries

이정윤, 박희구 ^†

계명대학교 공과대학 화학시스템공학과

Jung-Youn Lee, and Heai-Ku Park^†

Department of Chemical System Engineering, College of Engineering, Keimyung University, Korea

E-mail:

초록

리튬2차전지의 양극소재로 이용 가능한 V₂O₅ 겔을 졸-겔법으로 합성한 후 미량의 아연을 도핑시켜 Zn_xV₂O₅ xerogel (x=0.01, 0.05, 0.10)을 합성한 후 리튬2차전지 양극 소재로서의 전기화학적 특성을 연구하였다. Zn의 도핑된 양에 따라 층간 거리는 13.1 ~ 14.2 Å로 증가하였다. Zn의 도핑된 양이 증가할수록 가역적인 전기화학적 반응을 보였으며, Zn_0.10V₂O₅ xerogel 전극에 10 mA/g의 방전전류를 인가하였을 때 140 mAh/g 이상의 비용량을 나타내었다. 셀에 50 mA/g의 인가전류로 20회 연속적으로 충·방전을 한 결과 Zn_0.10V₂O₅ xerogel은 91%의 초기용량을 유지하였다.

In order to improve the electrochemical properties of V₂O₅ xerogel, Zn_xV₂O₅ xerogels (x=0.01, 0.05, and 0.10) were synthesized by doping Zn into V₂O₅ gel that was prepared via the reaction of V₂ powder with hydrogen peroxide, and their electrochemical properties as cathodes of secondary lithium batteries were investigated. The interlayer distance of Zn_xV₂O₅ xerogels was in the ranges between 13.2 and 14.1 Å. Linear sweep voltammograms revealed that as the Zn concentration in Zn_xV₂O₅ xerogels increased, the reversibility improved. In the case of the Zn_0.10V₂O₅ electrode, the specific capacity was more than 140 mAh/g at 10 mA/g discharge rate. The Zn_0.10V₂O₅ electrode maintained 91% of the initial capacity after the 20th consecutive cycles.

Keywords:lithium battries;zinc vanadium oxides;vanadium pentoxides

[References]

Whittingham MS, Jacobson AJ, Intercalation Chemistry, xv, Academic Press, New York (1982)
Abraham KM, Electrochim. Acta, 38, 1233 (1993)
Guyomard D, Tarascon JM, J. Electrochem. Soc., 139, 937 (1992)
Momchilov A, Manev V, Nassalevska A, Kozawa A, J. Power Sources, 41, 305 (1993)
Aldebert P, Baffier N, Legendre J, Livage J, J. Rev. Chem. Miner., 19, 485 (1982)
Park HK, Smyrl WH, Ward MD, J. Electrochem. Soc., 142(4), 1068 (1995)
Gharbi N, Sanchez C, Livage J, Lemerle J, Nejem L, Lefebvre J, Inorg. Chem., 21, 2758 (1982)
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Aldebert P, Baffier N, Gharbi N, Livage J, Mater. Res. Bull., 16, 669 (1981)
Livage J, Jolivet JP, J. Non-Cryst. Solids, 121, 35 (1990)
Bullot J, Cordier P, Gallais O, Gauthier M, Livage J, J. Non-Cryst. Solids, 68, 123 (1984)
Livage J, Solid State Ion., 86, 935 (1996)
Pereira-Ramos JP, J. Power Sources, 54, 120 (1995)
Murphy DW, Christian PA, Science, 205, 651 (1979)
Livage J, Chem. Mater., 3, 578 (1991)
Granqvist CG, Handbook of Inorganic Electrochromic Materials, 128, Elsevier, Amsterdam (1995)

[Related Articles]

[1] Whittingham MS, Jacobson AJ, Intercalation Chemistry, xv, Academic Press, New York (1982)

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

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

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

[5] Aldebert P, Baffier N, Legendre J, Livage J, J. Rev. Chem. Miner., 19, 485 (1982)

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

[7] Gharbi N, Sanchez C, Livage J, Lemerle J, Nejem L, Lefebvre J, Inorg. Chem., 21, 2758 (1982)

[8] Bates JB, Dudney NJ, Lubben DC, Gruzalski GR, Kwak BS, Yu X, Zuhr RA, J. Power Sources, 54, 58 (1995)

[9] Aldebert P, Baffier N, Gharbi N, Livage J, Mater. Res. Bull., 16, 669 (1981)

[10] Livage J, Jolivet JP, J. Non-Cryst. Solids, 121, 35 (1990)

[11] Bullot J, Cordier P, Gallais O, Gauthier M, Livage J, J. Non-Cryst. Solids, 68, 123 (1984)

[12] Livage J, Solid State Ion., 86, 935 (1996)

[13] Pereira-Ramos JP, J. Power Sources, 54, 120 (1995)

[14] Murphy DW, Christian PA, Science, 205, 651 (1979)

[15] Livage J, Chem. Mater., 3, 578 (1991)

[16] Granqvist CG, Handbook of Inorganic Electrochromic Materials, 128, Elsevier, Amsterdam (1995)