SODIUM METAL BATTERIES WITH INTERCALATING CATHODE

摘要

Cell and batteries containing them employing a cathode having a intercalating metal oxide in combination with a sodium metal haloaluminate. At operating temperatures, the positive electrode (cathode) of the invention comprises electroactive cathode material permeated with and in physical and electrical contact with the sodium metal haloaluminate catholyte. The positive and negative electrodes are separated with a solid alkali metal conducting electrolyte. The intercalating metal oxice is not in direct physical contact with the solid electrolyte. Electric and ionic conductivity between the solid electrolyte and the positive electrode is mediated by the sodium haloaluminate catholyte. Batteries of the invention are useful for bulk energy storage, particularly for electric utility grid storage, as well as for electric vehicle propulsion.

主权项

1. A storage cell comprising:
a negative electrode comprising molten sodium metal; a positive electrode having solid sodium intercalating metal oxide; a molten sodium haloaluminate catholyte; and a solid sodium conducting separation element intermediate between the negative electrode and the molten sodium haloaluminate catholyte; wherein the molten sodium haloaluminate catholyte permeates the solid metal oxide of the positive electrode.