Solid oxide fuel cell electrolyte membrane and preparation method thereof and solid oxide fuel cell
A solid oxide and electrolyte membrane technology, applied in fuel cells, electrolytes, circuits, etc., can solve the problems of output power attenuation at working temperature, high conductance activation energy, etc., and achieve medium and low temperature, reduce ionic resistance, and facilitate large-scale production Effect
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Embodiment 1
[0034] This embodiment provides a solid oxide fuel cell electrolyte membrane, such as figure 2 (a) and figure 2 As shown in (b), it is formed on any surface of the substrate 2, including a plurality of alternately arranged first electrolyte units 11 and second electrolyte units 12, the first electrolyte unit 11 is composed of an oxygen ion conductor phase, and the second The electrolyte unit 12 is composed of a proton conductor phase. In this way, the introduction of proton conduction channels into the traditional oxygen ion conductor electrolyte membrane can effectively alleviate the problem of the significant drop in ion conductance of the electrolyte membrane due to the drop in battery operating temperature, and is conducive to the realization of medium and low temperature (300~800°C) of solid oxide fuel cells. and practical.
[0035] In this embodiment, the first electrolyte unit 11 and the second electrolyte unit 12 are strips with the same size and shape, their lengt...
Embodiment 2
[0039] This embodiment provides a solid oxide fuel cell electrolyte membrane, which is formed on any surface of the substrate 2, and also includes a plurality of alternately arranged first electrolyte units 11 and second electrolyte units 12, the material of which is the same as that of the embodiment 1, the difference is that a plurality of first electrolyte units 11 and a plurality of second electrolyte units 12 are alternately arranged along the length and width directions of the electrolyte membrane, such as image 3 As shown, two adjacent electrolyte units in each row or column are different electrolyte units. In this embodiment, the thickness of the first electrolyte unit 11 and the second electrolyte unit 12 is the thickness of the electrolyte membrane they constitute, and the length and width of the first electrolyte unit 11 and the second electrolyte unit 12 are both 3 microns.
Embodiment 3
[0041] This embodiment provides a method for preparing an electrolyte membrane for a solid oxide fuel cell, which includes the following steps:
[0042] (a) Put 5g of GDC10 nano powder with a primary particle size of about 50nm, 15g of binder and about 20ml of agate ball milling beads into a 50ml first agate ball mill jar; put 5g of BZCY nanometer powder with a primary particle size of about 90nm Put the powder, 12g of binder and about 20ml of agate ball milling beads into a 50ml second agate ball milling jar; fix the above two agate ball milling jars in the ball mill for ball milling; the ball milling method is: first, at 250 rpm Ball milling for 30 minutes at a rotating speed, then increase the rotating speed to 500 rpm for 480 minutes, and finally ball mill for 30 minutes at a rotating speed of 250 rpm to obtain an electrolyte slurry; wherein the binder is polyvinyl alcohol ([C 2 h 4 O] n ) aqueous solution, the concentration of polyvinyl alcohol is 2wt%, the average mole...
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Abstract
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