Patent ID: 11961963
Assignee: DEAKIN UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 11:
12. A method of manufacturing a sodium electrochemical cell which (i) comprises a negative electrode comprising sodium and a sodium-ion ionic liquid electrolyte having a sodium-ion concentration that is no less than 75% of its saturation limit in the electrolyte and is at least 40 mol %, the electrolyte comprising a phosphonium-based organic salt, and (ii) supports a current density at the negative electrode of at least 500 μA/cm2, the method comprising (i) bringing into contact with the negative electrode the sodium-ion ionic liquid electrolyte, and (ii) performing a polarisation cycle of the cell so as to form at the negative electrode a solid-electrolyte interphase (SEI) layer.