Phthalic acid assisted nano-sized spinel LiMn2O4 and LiCrxMn2xO4 (x = 0.00–0.40) via sol–gel synthesis and its electrochemical behaviour for use in Li-ion-batteries
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Phthalic acid assisted nano-sized spinel LiMn2O4 and
LiCrxMn2xO4 (x = 0.00–0.40) via sol–gel synthesis and its
electrochemical behaviour for use in Li-ion-batteries
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| Creator |
Thirunakaran, R.
Sivashanmugam, A. Gopukumar, S. Dunnill, C.W. Gregory, D.H. |
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| Subject |
Lithium batteries
Electrochemical Power Sources |
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| Description |
Nano-sized particles of spinel LiMn2O4 and LiCrxMn2xO4 (x = Cr; 0.00–0.40) have been synthesized using phthalic acid as chelating agent for the first time by sol–gel method. When compared to solid-state synthesis method, the sol–gel route reduces heating time of synthesize and to obtain particles of uniform surface morphology. The synthesized samples were characterized through thermo-gravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). SEM images of the parent compounds show nanospherical grains of LiMn2O4 when compared to chromium-doped ones. XRD patterns of LiMn2O4 ascertain amorphous nature and for high calcined LiCrxMn2�xO4 single phase highly crystalline patterns were obtained. TEM images of the parent and chromium-doped spinel particles depict individual grain morphology with well-separated grain boundaries. LiCr0.10Mn1.90O4 excels in discharge and cycling behaviour and offer higher
columbic efficiency, when compared to un-doped LiMn2O4. Cyclic voltammograms of LiMn2O4 and LiCrxMn2�xO4 exhibit
oxidation and reduction peaks corresponding to Mn3+/Mn4+ and Cr3+/Cr4+.
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| Publisher |
Elsevier Ltd.
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| Date |
2008
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/433/1/141-2008.pdf
Thirunakaran, R. and Sivashanmugam, A. and Gopukumar, S. and Dunnill, C.W. and Gregory, D.H. (2008) Phthalic acid assisted nano-sized spinel LiMn2O4 and LiCrxMn2xO4 (x = 0.00–0.40) via sol–gel synthesis and its electrochemical behaviour for use in Li-ion-batteries. Materials Research Bulletin, 43 (8-9). pp. 2119-2129. ISSN 0025-5408 |
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| Relation |
http://cecri.csircentral.net/433/
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