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http://dx.doi.org/10.5229/JKES.2011.14.1.027

Electrochemical Characteristics of Cr Added Li4Ti5O12 Prepared by Sol-gel Method  

Kim, Sun-Ah (Department of Chemical Engineering, Chungbuk National University)
Cho, Woo-Ram (Department of Chemical Engineering, Chungbuk National University)
Jeong, Koo-Hyun (Department of Chemical Engineering, Chungbuk National University)
Cho, Byung-Won (Battery Research Center, KIST)
Na, Byung-Ki (Department of Chemical Engineering, Chungbuk National University)
Publication Information
Journal of the Korean Electrochemical Society / v.14, no.1, 2011 , pp. 27-32 More about this Journal
Abstract
The electorchemical properties of $Li_4Ti_5O_{12}$ added with Cr was tested. The addition or substitution of atoms to $Li_4Ti_5O_{12}$ are expected to modify the crystal structure, and therefore to change the electrochemical performances of $Li_4Ti_5O_{12}$. After the spinel structure $Li_4Ti_{5-x}Cr_xO_{12}$ (x = 0~0.2) were obtained via sol-gel method, the gel was heated in a muffle furnace at $800{\sim}850^{\circ}C$ for 12 h in air. The physical properties of the samples were characterized by TG-DTA, XRD, SEM, FT-IR, and the electrochemical properties were tested with battery cycler at 0.01~2.0 V range. The $Li_4Ti_5O_{12}$ exhibited 169.9 mAh/g at 1C and capacity recovery was 97.5% of the initial capacity at 0.1C. $Li_4Ti_{4.9}Cr_{0.1}O_{12}$ (Cr 1% added) showed best performance of 193.8 mAh/g at 1C and the capacity recovery was increased to 98.8% of the initial capacity at 0.1C.
Keywords
Lithium ion battery; $Li_4Ti_5O_{12}$; Sol-gel method; Cr addition;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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