Abstract
A novel strategy to improve the electrochemical performance of Li 2MnO3 using transition metal doping by the mechanochemical process is proposed. Li2MnO3 precursors are treated with transition metal containing chemicals in the mechanochemical process, followed by heat treatment. Cr containing Li2MnO3, with only 1 mol% Cr doping, exhibits unique electrochemical properties with a large initial discharge capacity of 234.9 mAh g-1, which is superior to the 205.0 mAh g-1 of pristine Li2MnO3, and all other transition-metal containing oxides. The structures of Li2MnO 3 and Li2MnO3 with the transition metal element doping (TM-Li2MnO3) are studied by x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), and the electrochemical characteristics are further investigated using electrochemical impedance spectroscopy (EIS) measurements.
| Original language | English |
|---|---|
| Pages (from-to) | 159-165 |
| Number of pages | 7 |
| Journal | Journal of Electroceramics |
| Volume | 30 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2013 May 1 |
| Externally published | Yes |
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Keywords
- Doping
- LiMnO
- Lithium ion battery
- Mechanochemical process
- Surface treatment
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Mechanics of Materials
- Materials Chemistry
- Electrical and Electronic Engineering
Cite this
Effects of transition metal doping and surface treatment to improve the electrochemical performance of Li2MnO3 . / Kim, Soo; Noh, Jae Kyo; Yu, Seung-Ho; Chang, Wonyoung; Chung, Kyung Yoon; Cho, Byung Won.
In: Journal of Electroceramics, Vol. 30, No. 3, 01.05.2013, p. 159-165.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effects of transition metal doping and surface treatment to improve the electrochemical performance of Li2MnO3
AU - Kim, Soo
AU - Noh, Jae Kyo
AU - Yu, Seung-Ho
AU - Chang, Wonyoung
AU - Chung, Kyung Yoon
AU - Cho, Byung Won
PY - 2013/5/1
Y1 - 2013/5/1
N2 - A novel strategy to improve the electrochemical performance of Li 2MnO3 using transition metal doping by the mechanochemical process is proposed. Li2MnO3 precursors are treated with transition metal containing chemicals in the mechanochemical process, followed by heat treatment. Cr containing Li2MnO3, with only 1 mol% Cr doping, exhibits unique electrochemical properties with a large initial discharge capacity of 234.9 mAh g-1, which is superior to the 205.0 mAh g-1 of pristine Li2MnO3, and all other transition-metal containing oxides. The structures of Li2MnO 3 and Li2MnO3 with the transition metal element doping (TM-Li2MnO3) are studied by x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), and the electrochemical characteristics are further investigated using electrochemical impedance spectroscopy (EIS) measurements.
AB - A novel strategy to improve the electrochemical performance of Li 2MnO3 using transition metal doping by the mechanochemical process is proposed. Li2MnO3 precursors are treated with transition metal containing chemicals in the mechanochemical process, followed by heat treatment. Cr containing Li2MnO3, with only 1 mol% Cr doping, exhibits unique electrochemical properties with a large initial discharge capacity of 234.9 mAh g-1, which is superior to the 205.0 mAh g-1 of pristine Li2MnO3, and all other transition-metal containing oxides. The structures of Li2MnO 3 and Li2MnO3 with the transition metal element doping (TM-Li2MnO3) are studied by x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), and the electrochemical characteristics are further investigated using electrochemical impedance spectroscopy (EIS) measurements.
KW - Doping
KW - LiMnO
KW - Lithium ion battery
KW - Mechanochemical process
KW - Surface treatment
UR - http://www.scopus.com/inward/record.url?scp=84880701375&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84880701375&partnerID=8YFLogxK
U2 - 10.1007/s10832-012-9778-4
DO - 10.1007/s10832-012-9778-4
M3 - Article
VL - 30
SP - 159
EP - 165
JO - Journal of Electroceramics
JF - Journal of Electroceramics
SN - 1385-3449
IS - 3
ER -