An assembly with negatively charged ionomer membrane for aqueous rechargeable zinc metal battery

A process for the preparation of negatively charged dendrite inhibiting ionomer membrane (P-AS-C) comprising the steps of:

• a) dissolving 2 to 8 gms of polyvinyl alcohol (PVA) polymer in 70 to 90 mL of dry dimethyl sulfoxide (DMSO) as a solvent at a temperature in the range of 70-95° C. for a time period of 30 to 90 mins;
• b) adding 0.5 to 2 gms of a base selected from potassium carbonate, sodium carbonate and lithium carbonate and 1 to 2 gms of propane sultone into the solution of step a) and refluxing for 10 to 20 hours to obtain a reaction mixture;
• c) dialyzing the reaction mixture obtained at step b) on a cellulose membrane against distilled water for a time period of 10 to 15 hours followed by removing excess water by distillation to afford yellow liquid;
• d) mixing 0.1 to 0.5 gms of sulfonated polyvinyl alcohol (PVS) in yellow liquid of step c) in 1 to 5 gms of aqueous solution of polyvinyl alcohol (PVA) and 1 to 5 gms of water;
• e) stirring the above mixture obtained at step d) for a time period of 20 to 30 hours and pouring it into a petri dish;
• and
• f) heating the above reaction mixture in a hot air oven at a temperature of 30 to 60° C. for a time period of 10 to 20 hours to obtain the P-AS-C membrane material.