Effect of surface modifiers in improving the electrochemical behavior of LiNi0.4Mn0.4Co0.2O2 cathode
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Effect of surface modifiers in improving the electrochemical behavior of LiNi0.4Mn0.4Co0.2O2 cathode
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| Creator |
Bhuvaneswari, D.
Gangulibabu, . Kalaiselvi, N. |
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| Subject |
Lithium batteries
Electrochemical Power Sources |
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| Description |
Surface modification of LiNi0.4Mn0.4Co0.2O2 (4 4 2) compound with certain metal oxides viz., Al2O3, Bi2O3
and In2O3 has been attempted with a view to improve the structural and cycling stability, especially upon
high voltage and high rate cycling conditions. In addition to HF scavenging effect, the protective metal
oxide inter-connect layer restricts the number of oxide ion vacancies eliminated during the initial cycling
of cathode, resulting in the reduced irreversible capacity loss of the first cycle. Among the surface modified
cathodes, Bi2O3 coated LiNi0.4Mn0.4Co0.2O2 cathode exhibits appreciable specific capacity values of
196 mAh g−1 (Qdc1) and 175 mAh g−1 (Qdc100) with 89% capacity retention, thus evidencing the superiority
of Bi2O3 modifier in improving the electrochemical behavior of pristine LiNi0.4Mn0.4Co0.2O2 cathode.
Further, suitability of Bi2O3 coated LiNi0.4Mn0.4Co0.2O2 cathode for high voltage (5.0 V) and high rate (3 C)
lithium intercalation and de-intercalation applications has been demonstrated up to 100 cycles. Based
on the extent of improvement in electrochemical behavior, the cathodes under investigation could be
arranged in the order: Bi2O3 coated > Al2O3 coated > In2O3 coated > uncoated LiNi0.4Mn0.4Co0.2O2 oxide.
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| Publisher |
Elsevier
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| Date |
2013
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3057/1/051-2013.pdf
Bhuvaneswari, D. and Gangulibabu, . and Kalaiselvi, N. (2013) Effect of surface modifiers in improving the electrochemical behavior of LiNi0.4Mn0.4Co0.2O2 cathode. Electrochimica Acta, 109. pp. 684-693. ISSN 0013-4686 |
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| Relation |
http://www.elsevier.com/locate/electacta
http://cecri.csircentral.net/3057/ |
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