Electric energy store
AssigneeSiemens Aktiengesellschaft
InventorsWolfgang Drenckhahn, Harald Landes
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Abstract
An electric energy store includes a positive electrode, a negative electrode and an oxygen ion conducting electrolyte separating the positive electrode and the negative electrode from each other. The negative electrode includes a first reservoir having a gas-permeable oxidizable material and, contained therein, a gaseous, oxygen-exchanging redox pair. The positive electrode comprises a second reservoir having a gas-permeable oxidizable material and oxygen transport is effected by means of an oxygen-containing gaseous compound, wherein the positive electrode is closed with respect to the atmosphere.
Claims15
1-15. (canceled)
An electric energy store, comprising:
- a positive electrode,
- a negative electrode,
- an oxygen ion conducting electrolyte separating the positive electrode and the negative electrode from each other,
- wherein the negative electrode comprises a first reservoir having a gas-permeable oxidizable material and, contained therein, a gaseous, oxygen-exchanging redox pair, and
- wherein the positive electrode comprises a second reservoir having a gas-permeable oxidizable material and oxygen transport is effected by means of an oxygen-containing gaseous compound, wherein the positive electrode is closed with respect to the atmosphere.
A method for operating an electric energy store, comprising:
- reducing a gas-permeable metal oxide in a discharge process at a positive electrode, the oxygen resulting in the process being conducted in the form of an oxygen-containing compound through the gas-permeable metal oxide to an intermediate layer and being reduced to oxygen ions at said layer, the oxygen ions being in turn conducted through a solid-state electrolyte adjoining the intermediate layer and made to react at a negative electrode with a gaseous oxidizable substance, emitting electrons in the process, the gaseous oxidizable substance being oxidized to a compound that is gaseous at the operating temperature of the energy store and conducted in gaseous form into a reservoir containing a gas-permeable oxidizable material which is oxidized by means of the gaseous compound, the gaseous compound simultaneously being reduced to the oxidizable substance, which is returned to the electrolyte in turn for a further reaction with oxygen ions.
A method for operating an electric energy store, comprising:
- executing a charging process in a negative electrode, wherein a gaseous oxidizable substance in a first reservoir containing a gas-permeable oxide reacts with the latter in such a way that the oxide is reduced and the oxidizable substance is oxidized, after which the oxidized substance reaches an electrolyte adjacent to the negative electrode, is subsequently reduced while generating oxygen ions, the oxidizable substance again being produced as a by-product, the oxygen ions are conducted through the solid-state electrolyte and oxidized at an intermediate layer which is part of a positive electrode into a gaseous, oxygen-containing compound, and the oxygen-containing compound is conducted through a second reservoir of a gas-permeable metal or metal oxide, and in the process the metal is oxidized into a metal oxide.
Dependencies are inferred from the claim text.