Oxygen plenum configurations of components in low cost planar rechargeable oxide-ion battery (ROB) cells and stacks

摘要

An ROB stack (10′) contains a plurality of stacked ROB cells (10) made from: thin metal bipolar housings (13) having air inlets and exits and horizontal channels for feeding air between the inlets (16) and exits (17), the channel having top ridges and also grooves (25) for containing active material (34); a porous air electrode (21/39) next to the air channels allowing air contact; a metal electrode (36); and an oxygen ion transfer membrane (37) acting as electrolyte; wherein the plurality of all the assemblies form vertical air inlet and outlet plenums.

主权项

1. A rechargeable oxide ion battery (ROB) stack comprising:
a plurality of stacked ROB cells, each ROB cell comprising an electrically conducting metal bipolar housing having a thickness of from about 0.1 cm to 0.75 cm, wherein each bipolar housing comprises openings for vertical air inlets and vertical air exhaust inlets, each bipolar housing further including a recessed portion for housing a cell membrane, wherein each cell membrane comprises:
a plurality of channels and grooves defined between the channels, wherein the grooves are filled with a porous active metal material defining a metal electrode which stores or releases oxide ions;a porous air electrode disposed adjacent the channels allowing contact with a fluid flowing through the channels; andan electrical contact disposed on the channels; and a dielectric perimeter seal disposed between the bipolar housings wherein, in the plurality of ROB cells, the vertical air inlets and air exhaust inlets form air inlet plenums and air exhaust plenums which allow air contact with adjacent ROB cells, and wherein the channels and grooves prevent air contact with any active material.