Novel chelating agent assisted dual doped spinel via sol–gel method for lithium rechargeable batteries
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Novel chelating agent assisted dual doped spinel via sol–gel method for lithium rechargeable batteries
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| Creator |
Thirunakaran, R
Lew, Gil Hwan Yoon, Won-Sub |
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| Subject |
Electrochemical Power Sources
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| Description |
LiMn2O4 and LiCuxAlyMn2 − x − yO4 (x=0.50; y=0.05–0.50) powders have been synthesized via sol–gel method
for the first time using Margaric acid as chelating agent. The synthesized samples have been used to physical
and electrochemical characterization such as thermo gravimetric analysis (TG/DTA), X-ray diffraction (XRD),
Fourier-transform infrared spectroscopy (FT-IR), field-emission scanning electron microscopy (FESEM), transmission
electron microscopy (TEM) and electrochemical characterization viz., electrochemical galvanostatic cycling
studies, electrochemical impedance spectroscopy (EIS) and differential capacity curves (dQ/dE). XRD
patterns of LiMn2O4 and LiCuxAlyMn2−x−yO4 confirm high degree of crystallinitywith better phase purity of synthesized
materials. FESEM images of parent LiMn2O4 depict the most of the particles that are in 0.5 μm while
LiCu0.5Al0.05Mn1.45O4 powders exhibiting ice-cube surface morphology with good agglomerated less particle
size of 50 nm. TEM images of spinel LiMn2O4 and LiCu0.5Al0.05Mn1.45O4 corroborate that all the synthesized particles
are nano-sized with uniformspherical and cloudy particlemorphology. LiMn2O4 samples calcined at 850 °C
deliver the high discharge capacity of 130 mA h g−1 in the first cyclewhile LiCu0.5Al0.05Mn1.45O4 samples deliver
120 mA h g−1 during the first cycle. Inter alia all the dopant compositions investigated, LiCu0.5Al0.05Mn1.45O4 delivers
the stable cycling performance of 119 and 115mAh g−1 in the 5th and 10th cyclewith lowcapacity fade of
0.1 and 0.1 mA h g−1 cycle−1 corresponding to columbic efficiency of 99 and 99%.
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| Publisher |
Elsevier B.V.
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| Date |
2016
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3165/1/092-2016.pdf
Thirunakaran, R and Lew, Gil Hwan and Yoon, Won-Sub (2016) Novel chelating agent assisted dual doped spinel via sol–gel method for lithium rechargeable batteries. Journal of Electroanalytical Chemistry, 767. pp. 141-152. ISSN 1572-6657 |
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| Relation |
http://www.elsevier.com/locate/jelechem
http://cecri.csircentral.net/3165/ |
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