Abstract
The surface modified Mn2O4 materials with Li-Fe composites were prepared by a sol-gel method to improve the electrochemical performance of Mn2O4 and were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), and transmission electron microscopy (TEM)-EDS. XRD results indicate that all the samples (modified and pristine samples) have cubic spinel structures, and XRD, XPS, and TEM-EDS data reveal the formation of Li(LixFexMn2-2x)O4 solid solution on the surface of particles. For the electrochemical properties, the modified material demonstrated dramatically enhanced reversibility and stability even at elevated temperature. These improvements are attributed to the formation of the solid solution, and thus-formed solid solution phase on the surface of Mn2O4 particle reduces the dissolution of Mn ion and suppresses the Jahn-Teller effect.
| Original language | English |
|---|---|
| Pages (from-to) | 309-314 |
| Number of pages | 6 |
| Journal | Bulletin of the Korean Chemical Society |
| Volume | 31 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2010 Feb 1 |
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Keywords
- Lithium ion batteries
- Lithium manganese oxide
- Solid solution
- Spinel
- Surface modification
ASJC Scopus subject areas
- Chemistry(all)
Cite this
Enhanced electrochemical properties of surface modified limn 2O4 by Li-Fe composites for rechargeable lithium ion batteries. / Shi, Jin Yi; Yi, Cheol Woo; Liang, Lianhua; Kim, Keon.
In: Bulletin of the Korean Chemical Society, Vol. 31, No. 2, 01.02.2010, p. 309-314.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Enhanced electrochemical properties of surface modified limn 2O4 by Li-Fe composites for rechargeable lithium ion batteries
AU - Shi, Jin Yi
AU - Yi, Cheol Woo
AU - Liang, Lianhua
AU - Kim, Keon
PY - 2010/2/1
Y1 - 2010/2/1
N2 - The surface modified Mn2O4 materials with Li-Fe composites were prepared by a sol-gel method to improve the electrochemical performance of Mn2O4 and were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), and transmission electron microscopy (TEM)-EDS. XRD results indicate that all the samples (modified and pristine samples) have cubic spinel structures, and XRD, XPS, and TEM-EDS data reveal the formation of Li(LixFexMn2-2x)O4 solid solution on the surface of particles. For the electrochemical properties, the modified material demonstrated dramatically enhanced reversibility and stability even at elevated temperature. These improvements are attributed to the formation of the solid solution, and thus-formed solid solution phase on the surface of Mn2O4 particle reduces the dissolution of Mn ion and suppresses the Jahn-Teller effect.
AB - The surface modified Mn2O4 materials with Li-Fe composites were prepared by a sol-gel method to improve the electrochemical performance of Mn2O4 and were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), and transmission electron microscopy (TEM)-EDS. XRD results indicate that all the samples (modified and pristine samples) have cubic spinel structures, and XRD, XPS, and TEM-EDS data reveal the formation of Li(LixFexMn2-2x)O4 solid solution on the surface of particles. For the electrochemical properties, the modified material demonstrated dramatically enhanced reversibility and stability even at elevated temperature. These improvements are attributed to the formation of the solid solution, and thus-formed solid solution phase on the surface of Mn2O4 particle reduces the dissolution of Mn ion and suppresses the Jahn-Teller effect.
KW - Lithium ion batteries
KW - Lithium manganese oxide
KW - Solid solution
KW - Spinel
KW - Surface modification
UR - http://www.scopus.com/inward/record.url?scp=77951833780&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77951833780&partnerID=8YFLogxK
U2 - 10.5012/bkcs.2010.31.02.309
DO - 10.5012/bkcs.2010.31.02.309
M3 - Article
AN - SCOPUS:77951833780
VL - 31
SP - 309
EP - 314
JO - Bulletin of the Korean Chemical Society
JF - Bulletin of the Korean Chemical Society
SN - 0253-2964
IS - 2
ER -