Sol–gel synthesis and impedance characteristics of networked nanocrystalline olivine cathode for Li-ion full cells
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Sol–gel synthesis and impedance characteristics of
networked nanocrystalline olivine cathode for Li-ion
full cells
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| Creator |
Manikandan, P.
Periasamy, P. Jagannathan, R. |
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| Subject |
Fuel Cells
Lithium batteries Electrochemical Power Sources |
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| Description |
A sol–gel synthesis using adipic acid yielded small particles of around 20 nm in size of olivine LiFePO4/C
cathode materials. In the characterization of cathode system(s), solid state impedance spectra of the
pristine LiFePO4/C cathode revealed clear localization of charge through charge build-up.
When networked with MWCNT, this material facilitates enhancement in charge mobility, eventually
explaining the capacity enhancement of the LiFePO4/C–MWCNT electrode, which yields a high capacity
of 163 mA h g�1 at C/10. On the other hand, the lower capacity of 125 mA h g�1 found for the pristine
LiFePO4/C electrode material can be explained in terms of charge becoming localized/trapped in the
vicinity of inter- and intra-granular regions of the cathode particles. To get a broader view of the
application potential (in terms of cell voltages of �3 V, 2 V, and safety aspects) of the networked
cathode materials, two kinds of Li-ion full cells using mesocarbon microbeads (MCMB) and Li4Ti5O12 as
anodes were fabricated, which yielded capacities of 1.94 and 2.1 mA h respectively
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| Publisher |
The Royal Society of Chemistry
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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/3115/1/082-2013.pdf
Manikandan, P. and Periasamy, P. and Jagannathan, R. (2013) Sol–gel synthesis and impedance characteristics of networked nanocrystalline olivine cathode for Li-ion full cells. Journal of Materials Chemistry A, 1. pp. 15397-15405. ISSN 0959-9428 |
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| Relation |
http://cecri.csircentral.net/3115/
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