Effect of Different Conductive Additives on Electrochemical Performance of Li-Ion Coin Cells
In this work, we examine the effect of various conductive additives and their combinations to fabricate 2032 coin cells to achieve higher discharge capacity with improved cycle life at low cost. In this connection, electrodes will be prepared by using carbon black (CB), single-walled carbon nanotubes (SWCNTs), multi-walled carbon nanotubes (MWCNTs) and combinations of CB & SWCNTs, CB & MWCNTs, SWCNTs & MWCNTs and CB & CWCNTs & MWCNTs with LiMn2O4as the active material. Schematic representation of the electrodes using these conductive additives is shown in Figure 1. The cell fabricated by using these electrodes will be analyzed for capacity retention, discharge capacity and cycling performance. Electrochemical impedance spectroscopy (EIS) will be employed to analyze the aging effects and rate of capacity degradation of cells by quantifying the growth of internal resistances with cycling. The morphological and structural changes of electrodes due to cycling will be examined by using SEM and XRD techniques respectively at fresh and cycled stage. The results obtained from this study will be expected to frame a standard on the amount of conductive additives to be added during electrode fabrication to result in improved cycling performance of these cells.
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