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http://dx.doi.org/10.5229/JECST.2015.6.2.59

Synthesis and Electrochemical Characteristics of Spherical Li4Ti5O12/CNT Composite Materials for Hybrid Capacitors  

Yang, Joeng-Jin (Department of Industrial Engineering Chemistry, Chungbuk National UniversityWaseda University)
Kim, Yu-Ri (Department of Industrial Engineering Chemistry, Chungbuk National University)
Jeong, Moon-Gook (Waseda University)
Yuk, Yong-Jae (PureEChem Co., Ltd.)
Kim, Han-Joo (PureEChem Co., Ltd.)
Park, Soo-Gil (Department of Industrial Engineering Chemistry, Chungbuk National University)
Publication Information
Journal of Electrochemical Science and Technology / v.6, no.2, 2015 , pp. 59-64 More about this Journal
Abstract
Spherical Li4Ti5O12 and Li4Ti5O12 carbon nanotube (CNT) composites were synthesized using a colloid system. The electrochemical properties of the composites were thoroughly examined to determine their applicability as hybrid capacitor anodes. The electrical conductivity of the spherical Li4Ti5O12-CNT composite was improved over that of the spherical Li4Ti5O12 composite. The synthesized composites were utilized as the anode of a hybrid capacitor, which was assembled with an activated carbon (AC) positive electrode. The CNTs attached on the spherical Li4Ti5O12 particles contributed to a 51% reduction of the equivalent series of resistance of the Li4Ti5O12-CNTs/AC hybrid capacitor compared to the Li4Ti5O12/AC hybrid capacitor. Moreover, the Li4Ti5O12-CNTs/AC hybrid capacitor showed a larger capacitance than the Li4Ti5O12/AC hybrid capacitor; specifically, the Li4Ti5O12-CNT/AC hybrid capacitor showed 1.6 times greater capacitance at 40 cycles with a 10 mA cm−2 loading current density.
Keywords
Spherical $Li_4Ti_5O_{12}$; $Li_4Ti_5O_{12}$-CNT composite; $Li_4Ti_5O_{12}$/AC hybrid capacitors;
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