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http://dx.doi.org/10.9713/kcer.2014.52.1.52

Electrochemical Characteristics of Hybrid Capacitor using Core-shell Structure of MCMB/Li4Ti5O12 Composite  

Ko, Hyoung Shin (POSCO ESM)
Choi, Jeong Eun (Department of Chemical Engineering, Chungbuk National Universtiy)
Lee, Jong Dae (Department of Chemical Engineering, Chungbuk National Universtiy)
Publication Information
Korean Chemical Engineering Research / v.52, no.1, 2014 , pp. 52-57 More about this Journal
Abstract
The MCMB-$Li_4Ti_5O_{12}$ with core-shell structure was prepared by sol-gel process to improve low cycle capability of MCMB in this study. The electrochemical characteristics were investigated for hybrid capacitor using MCMB-$Li_4Ti_5O_{12}$ as the negative electrode and $LiMn_2O_4$, Active carbon fiber as the positive electrode. The electrochemical behaviors of hybrid capacitor using organic electrolytes ($LiPF_6$, EC/DMC/EMC) were characterized by charge/discharge, cyclic voltammetry, cycle and impedance tests. The hybrid capacitor using MCMB-$Li_4Ti_5O_{12}/LiMn_2O_4$ electrodes had better capacitance than MCMB hybrid systems and was able to deliver a specific energy with 67 Wh/kg at a specific power of 781 W/kg.
Keywords
Meso Carbon Microbeads; $Li_4Ti_5O_{12}$; Core-shell Structure; Surface Modification; Hybrid Capacitor;
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