Enhanced cyclability and thermal stability of LiCoO2 coated with cobalt oxides
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Enhanced cyclability and thermal stability of LiCoO2
coated with cobalt oxides
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| Creator |
Fey, G.T.
Lin, Y.Y. Premkumar, T. |
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| Subject |
Lithium batteries
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| Description |
Improved cycling properties and thermal stability of LiCoO2 coated with cobalt oxides by a wet chemical process are described. XRD
studies showed that the values of the lattice parameters, a and c, were altered by the coating, indicating that substitutional compounds might
have formed on the surface upon calcination. TEM studies on 0.3-wt.% cobalt oxide-coated LiCoO2 suggested that cobalt oxides formed a
uniform coating over the cathode material. SEM images, R-factor values from XRD studies and galvanostatic cycling studies indicated that a
coating level of 0.3 wt.% produced optimal performance in terms of capacity and cyclability. Cyclic voltammetric curves suggested that the
coating suppressed the cycle-limiting phase transitions that occur at potentials above 4.1 V vs. Li+/Li. Charge–discharge studies with a 0.3-
wt.% cobalt oxide-coated LiCoO2 material showed a 12-fold improvement in cyclability. Differential scanning calorimetric data revealed the
higher thermal stability of the coated cathode materials.
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| Publisher |
Elsevier
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| Date |
2005
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/187/1/096-2005.pdf
Fey, G.T. and Lin, Y.Y. and Premkumar, T. (2005) Enhanced cyclability and thermal stability of LiCoO2 coated with cobalt oxides. Surface & Coatings Technology, 191 (1). pp. 68-75. |
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| Relation |
http://cecri.csircentral.net/187/
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