Innovating Sulfur Based Electrode and Modified Lithium Electrode for Stable and Safer Lithium-Sulfur Batteries. Cycling, Impedance, Non-Destructive Testing, Construction

摘要

In the article the results of galvanostatic cycling of electrochemical cells with sulfur electrodes, prepared by the innovative saturation method of the carbon matrix with sulfur, previously dissolved in an organic solvent are presented. Studies of Li-S cells were carried out in two types of electrochemical cells: 1) 2-electrode coin cells (size 2016) and 2) 3-electrode flat pouch cells, with a lithium reference electrode. The effects of 1) the sulfur content in the cathode on the specific reversible electrochemical capacity of sulfur, as well as 2) the effect of the capacity per cm2 of the electrode surface during lithium cycling on the stability of the electrochemical system as a whole are shown. The process of self- discharge of the sulfur electrode during storage and the change of the impedance of the sulfur electrode during storage are investigated.