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http://dx.doi.org/10.5229/JKES.2010.13.2.103

Synthesis of Defective-Structure Li4Mn5O12 by Combustion Method and Its Application to Hybrid Capacitor  

Kim, Hun-Uk (Department of WCU Energy Engineering, Hanyang University)
Sun, Yang-Kook (Department of WCU Energy Engineering, Hanyang University)
Lee, Bum-Suk (Korea Institute of Energy Research)
Jin, Chang-Soo (Korea Institute of Energy Research)
Shin, Kyoung-Hee (Korea Institute of Energy Research)
Publication Information
Journal of the Korean Electrochemical Society / v.13, no.2, 2010 , pp. 103-109 More about this Journal
Abstract
$Li_4Mn_5O_{12}$ was synthesized by combustion method using $LiNO_3$, $Li(CH_3COO){\cdot}2H_2O$ and $Mn(CH_3COO)_2{\cdot}4H_2O$. $Li_4Mn_5O_{12}$ was obtained over $400^{\circ}C$, however, the sample calcined at $400^{\circ}C$ for any time was mixed phases of $Li_4Mn_5O_{12}$ and $Mn_2O_3$. $Li_4Mn_5O_{12}$ calcined at $400^{\circ}C$ for 5 h had larger first discharge capacity (41.5mAh/g) at 1C-rate for 3.7~4.4V than other calcined samples. Moreover, applying to hybrid capacitor, it had good discharge capacity (24.74 mAh/g or 10.46 mAh/cc) at 100 mA/g for 1~2.5 V and higher energy density (39Wh/kg or 16.49Wh/cc) at same condition.
Keywords
$Li_4Mn_5O_{12}$; Hybrid capacitor; Specific discharge capacitance; Energy density;
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