Abstract Paper
| Title | : Probing the Electrochemical Reactions in Li Battery Materials Employing Magnetization Measurements |
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| Author(s) | : Collin Issac Thomas, K. Kamala Bharathi |
| Article Information | : Volume 1 - Issue 1 (April - 2017) , 40–44 |
| Affiliation(s) | : 1 Department of Physics and Nanotechnology, Research Institute, SRM University, Kattankulathur, Chennai 603203, India |
Abstract :
We report on utilization of magnetization measurements as a tool to investigate the cathode/anode materials after they are electrochemically charged and discharged. We have performed the ex-situ magnetic studies on the CoFe2O4 electrodes after 1st discharge, 1st cycle, 20 and 30 cycles to understand the chemical reactions taking place during the electrochemical cycling. Nanocrystalline cobalt ferrite particles were synthesized by a sol–gel combustion method. CoFe2O4 is found to crystallize in inverse spinel structure belonging to Fd-3m space group without any impurity phase. CoFe2O4 electrodes were prepared with PVDF and alginate binders separately and electrochemical cycling was performed on all of them. RT magnetization measurements were carried out on the electrodes after 1st discharge, 1st cycle, 20 cycles and 30 cycles. Saturation magnetization (Ms) of pure CoFe2O4 powder is seen to be 77 emu/g, In the case of CoFe2O4-PVDF electrodes, saturation magnetization values after 1st discharge, 1st cycle and 30 cycles are 135, 97 and 43 emu/g respectively. Saturation magnetization value of CoFe2O4-alginate electrodes after 1st discharge, 1st, 20th and 30th cycles is seen to be 130, 63, 60 and 62 emu/g respectively. Obtained results indicate magnetization measurements can helps to identify the chemical reactions taking place during the electrochemical cycles in the electrode materials containing magnetic elements
| Keywords | : Li Batteries, Magnetization, Co Ferrite, Scanning Electron Microscope |
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| Document Type | : Research Paper |
| Publication date | : April 21, 2017 |