Improved Mechanistic Degradation Modes Modeling of Lithium and Sodium Plating - Preliminary Data

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Preliminary data associated with the Battery communication entitled "Improved Mechanistic Degradation Modes Modeling of Lithium and Sodium Plating" Metadata and instruction are included in the matfile.

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In this work, 1.5 cm diameter circular electrodes were prepared and tested in Hawaii. The electrodes were punched out of a sheet of NE harvested from commercial Li-ion and Na-ion cells. A portion of the electrode sheet was first rinsed using dimethyl carbonate before one side was cleaned using N-Methylpyrrolidone. Electrodes were then cut using an EL-CUT punching tool (EL-CELL, Hamburg, Germany) before being assembled in a 2032 coin-cells respectively with a NE consisting of metallic lithium or sodium, one glass fiber GF/A separator (EL-CELL, Hamburg, Germany), and an electrolyte made of ethylene and propylene carbonates (EC and PC respectively) in a 50:50 ratio with 1M LiPF6 for the lith-ium cells and 1M NaClO4 for the sodium cells. All the chemicals were obtained from Sig-ma Aldrich and all the experiments were performed on a VMP3 potentiostat/galvanostat (Biologic, Claix, France). A RPT was performed using a 1.6 cm diameter electrode with the same electrolyte and separators as above. Full cycles were performed at C/50, C/25, C/16, C/8, C/4, C/2, C/1, 2C, and 4C with 4-hour rests at the end of charge and discharge. The cutoffs were set to 1.2V at end of charge and were of 0mV, -5mV, -10mV, -15mV, -25mV, -45mV, -60mV and -115mV in discharge respectively to the rate. A residual capac-ity step at C/50 followed by another 4-hour rest was performed at the end of each regime.

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