A flat-tube solid oxide battery structure and its preparation method for improving yield and single-cell power

Abstract

The invention relates to the field of electrochemistry, and discloses a flat tube solid oxide battery structure for improving yield and single battery power and a preparation method thereof. The structure comprises multiple pairs of electrodes; an isolation structure comprises a first electrolyte, a second electrolyte, a two-surface air passage wall and a separator plate; the cross section of an integral body formed by the two-surface air passage wall and the separator plate is in H type, and the separator plate separates the air passage into an upper and a lower part; two air passages with openings at the double ends are formed; at least one air passage rack is arranged in the air passages along a vertical direction of the isolation structure, an air passage rack does not contact electrolyte and is against an inner electrode, and the air passage rack separates the air passage into several subsidiary air passages on the same horizontal surface; the electrolyte, the air passage wall, the separator plate and the air passage rack are made of the same material or materials which have similar composition. The flat tube solid oxide battery structure has higher yield during processing, and the product has higher power.

Description

Technical field [0001] The invention relates to a solid oxide fuel cell, a solid oxide fuel electrolysis cell, new energy sources, new materials and the fields of electrochemistry, in particular to a flat tube solid oxide battery structure that improves the yield and single cell power. Background technique [0002] The flat tube battery has at least one channel of gas flowing through the internal air passage, which is a gas passage formed by the air passage wall and the electrolyte and isolated from the outside. Such as Figure 4 Shown is the cross-sectional structure of an ordinary flat tube battery. In order to increase the power of a single battery, the electrode area of ​​the battery must be increased, and the width of the airway must be increased. However, as the width of the air passage increases, the strength of the flat tube battery decreases, the electrolyte is easily broken, and the yield of battery preparation also decreases. [0003] For this reason, the applicant can ...

AI Technical Summary

Problems solved by technology

When the airway wall and airway support are all directly connected to the electrolyte, the dimensional changes of the airway wall, airway support, airway filler and electrolyte must be Basically consistent, to ensure the integrity of the battery structure, which is usually difficult to achieve, so it is difficult to avoid stress inside the battery

In general, the airway wall, airway stent, and electrolyte are composed of dense materials with similar or identical compositions, and the internally accumulated stress is difficult to release, which increases the risk of maintaining the integrity of the battery structure and reduces the yield of the battery

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