TiO2 마이크로콘/CNT 복합체의 전기화학적 합성 및 리튬 이온 전지 음극 소재로의 응용

신나현; 김용태; 최진섭; Nahyun Shin; Yong-Tae Kim; Jinsub Choi

Applied Chemistry for Engineering, Vol.31, No.5, 509-513, October, 2020

DOI10.14478/ace.2020.1059 Export Citation

TiO2 마이크로콘/CNT 복합체의 전기화학적 합성 및 리튬 이온 전지 음극 소재로의 응용

Electrochemical Synthesis of TiO2 Microcones/CNT Composites as Anode Material for Lithium Ion Batteries

신나현, 김용태^†, 최진섭 ^†

인하대학교 화학공학과

Nahyun Shin, Yong-Tae Kim^†, and Jinsub Choi^†

Department of Chemistry and Chemical Engineering, Inha University, Incheon 22212, Korea

E-mail:,

초록

본 연구는 리튬이온 이차전지의 음극재로서 TiO2 마이크로콘/CNT 복합체를 제조하여 배터리의 성능을 측정하였다. 양극산화법을 통해 리튬이온이 저장될 수 있는 넓은 표면적의 나노조각으로 구성된 TiO2 마이크로콘 구조를 제조하였다. 이어서 polarization과 전기 영동법을 통해 CNT를 증착하였다. TiO2 마이크로콘/CNT 복합체 전극은 전기전도도와 리튬이온 전도도가 향상되어 순수한 TiO2 마이크로콘 전극 대비 더 높은 용량과 사이클 안정성을 보였다. 또한 TiO2 마이크로콘/CNT 복합체는 최대 20 C의 높은 전류밀도에서도 우수한 수명특성과 속도유지율을 보였다.

The performance of TiO2 microcones/CNT composites as an anode material for lithium ion batteries was investigated. TiO2 microcones/CNT composites were prepared by the polarization followed by electrophoretic deposition approaches on anodic TiO2 microcones, which were composed of individual nanofragments resulting in a large surface area where lithium ion can be stored. Compared to pristine TiO2 microcones, TiO2 microcones/CNT composite electrodes showed higher areal capacity with a stable cyclability due to an enhanced electrical and lithium ion conductivity. Furthermore, TiO2 microcones/CNT composite electrodes exhibited good cycle life characteristics and excellent rate retention under a high current density of up to 20 C.

Keywords:TiO2 microcones;CNT;Anodization;Electrophoretic deposition;Lithium ion batteries

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[Related Articles]

[1] Zu CX, Li H, J. Energy Environ. Sci., 4, 2614 (2011)

[2] Chianelli RR, J. Cryst. Growth, 34, 239 (1976)

[3] Tran TD, Feikert JH, Song X, Kinoshita K, J. Electrochem. Soc., 142(10), 3297 (1995)

[4] Winter M, Besenhard JO, Spahr ME, Novak P, Adv. Mater., 10(10), 725 (1998)

[5] Ortiz GF, Hanzu I, Djenizian T, Lavela P, Tirado JL, Knauth P, Chem. Mater., 21, 63 (2009)

[6] Zhu GN, Wang YG, Xia YY, Energy Environ. Sci., 5, 6652 (2012)

[7] Rhee O, Lee G, Choi J, ACS Appl. Mater. Interfaces, 8, 14558 (2016)

[8] Yen JP, Chang CC, Lin YR, Shen ST, Hong JL, J. Alloy. Compd., 598, 184 (2014)

[9] Terranova ML, Orlanducci S, Tamburri E, Guglielmotti V, Rossi M, J. Power Sources, 246, 167 (2014)

[10] Liu J, Feng H, Jiang J, Qian D, Li J, Peng S, Liu Y, J. Alloy. Compd., 603, 144 (2014)

[11] Su Z, Zhang L, Jiang F, Hong M, Prog. Nat. Sci., 23, 294 (2013)

[12] Jitianu A, Cacciaguerra T, Benoit R, Delpeux S, Beguin F, Bonnamy S, Carbon, 42, 1147 (2004)

[13] Ferrari AC, Solid State Commun., 143, 47 (2007)

[14] Kubiak P, Froschl T, Husing N, Hormann U, Kaiser U, Schiller R, Weiss CK, Landfester K, Wohlfahrt-Mehrens M, Small, 7, 1690 (2011)

[15] Wang YX, Xie J, Cao GS, Zhu TJ, Zhao XB, J. Mater. Res., 27, 417 (2012)

[16] Zhang P, Qiu JX, Zheng ZF, Liu G, Ling M, Martens W, Wang HH, Zhao HJ, Zhang SQ, Electrochim. Acta, 104, 41 (2013)

[17] Li X, Qu MZ, Huai YJ, Yu ZL, Electrochim. Acta, 55(8), 2978 (2010)