Korean Chemical Engineering Research, Vol.46, No.1, 69-75, February, 2008
Mechanochemical Process로 제조된 LiCoO2의 전기화학적 특성
Electrochemical Properties of LiCoO2 Prepared by Mechanochemical Process
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초록
Mechanochemical process로 제조된 LiCoO2 전극의 경우에 4.3 V 이상의 전위영역에서 용량감소현상이 두드러지게 나타난 반면에, Zr을 피복한 LiCoO2의 경우에는 4.5 V의 전위에서도 안정성을 유지하였다. 본 연구에서 제작한 Zr이 피복된 LiCoO2 전극은 3.0~4.5 V 구간에서 197 mAh/g의 용량을 나타내었으며, 50 사이클 후에 96%의 방전용량을 유지하므로 전지의 안정성을 확보하였다.
Discharge capacity of LiCoO2 in preparation by mechanochemical process decreased
remarkably over 4.3V. However, Zr coating of LiCoO2 showed very stable electrochemical properties up to 4.5V. Zr coating of LiCoO2 in this experiment showed the discharge capacity of 197 mAh/g at 3.0-4.5V, and it maintained 96% of the initial discharge capacity after 50 cycle of charge/discharge.
- Mizushima K, Jones PC, Wiseman PC, Goodenough JB, Mater. Res. Bull., 15(6), 783 (1980)
- Nagaura T, Tozawa K, Prog. Batt. Solar Cells, 9, 209 (1990)
- Antaya M, Dahn JR, Preston JS, Rossen E, Reimers JN, J. Electrochem. Soc., 140(3), 575 (1993)
- Wang B, Bates JB, Hart FX, Sales BC, Zuhr RA, Robertson JD, J. Electrochem. Soc., 143(10), 3203 (1996)
- Myung ST, Kumagai N, Komaba S, Chung HT, Solid State Ion., 139(1-2), 47 (2001)
- Kim YJ, Kim TJ, Shin JW, Park B, Cho JP, J. Electrochem. Soc., 149(10), a1337 (2002)
- Cho J, Kim CS, Yoo SI, Electrochem. Solid State Lett., 3(8), 362 (2000)
- Wang ZX, Wu CA, Liu LJ, Wu F, Chen LQ, Huang XJ, J. Electrochem. Soc., 149(4), a466 (2002)
- Chen ZH, Dahn JR, Electrochem. Solid State Lett., 5(10), a213 (2002)
- Saadoune I, Delmas C, J. Solid State Chem., 136(1), 8 (1998)
- Stoyanova R, Zhecheva E, Zarkova L, Solid State Ion., 73(3-4), 233 (1994)
- Jang YI, Huang BY, Wang HF, Sadoway DR, Ceder G, Chiang YM, Liu H, Tamura H, J. Electrochem. Soc., 146(3), 862 (1999)
- Alcantara R, Lavela P, Tirado JL, J. Solid State Chem., 134(2), 265 (1997)
- Guyomard D, Tarascon JM, Solid State Ion., 69(3-4), 222 (1994)
- Tarascon JM, Guyomard D, Solid State Ion., 69(3-4), 293 (1994)
- Castro-Garcia S, Castro-Couceiro A, Senaris-Rodriguez MA, Soulette F, Julien C, Solid State Ion., 156(1-2), 15 (2003)