Preparation method of solid-state thin-film fuel cell

Abstract

The invention provides a preparation method of a solid-state thin film fuel cell, and the method comprises the following steps: S1, controlling a thin film deposition device to deposit a first electrode layer on a substrate, wherein the thickness of the first electrode layer gradually decreases in a first direction; S2, controlling the thin film deposition device to deposit an electrolyte layer onthe upper surface of the first electrode layer; S3, controlling the thin film deposition device to deposit a second electrode layer on the upper surface of the electrolyte layer, wherein the thickness of the second electrode layer gradually increases in the first direction. The first electrode layer is one of the anode layer and the cathode layer, and the second electrode layer is the other one of the anode layer and the cathode layer. The solid-state thin-film fuel cell is obtained by the preparation method. The first electrode layer and the second electrode layer form a wedge-shaped structure, so that the space size of the solid-state thin film fuel cell is effectively reduced, the area of a reaction interface between the two electrode layers and the electrolyte layer is increased, thereby further improving the space utilization rate of the cell and the volume energy density of the cell.

Description

technical field [0001] The invention relates to the technical field of battery preparation, in particular to a preparation method of a solid thin film fuel cell. Background technique [0002] In traditional solid-state fuel cells, the cathode, anode, and electrolyte are all made of solid oxides, and most of them are made of ceramic technology, so the volume of the entire solid-state fuel cell is relatively large. Even a single solid-state fuel cell is above the centimeter level, and the large ones even reach the meter level. For ceramic technology, due to the limitations of the preparation process, it is generally difficult to prepare micron-scale and nano-scale materials and corresponding devices. [0003] With the development of society, the requirements for device space size and volume energy density, solid-state fuel cells are also developing in the direction of miniaturization. In particular, to increase the energy density of solid-state fuel cells within a limited sp...

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Problems solved by technology

[0004] The main purpose of the present invention is to propose a method for preparing a solid-state thin-film fuel cell, aiming to solve the technical problems of the thin-film fuel cell obtained by the existing preparation method, such as small reaction interface, low space utilization rate and low volumetric energy density

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