Air electrode catalyst of aluminum-air battery and preparation method of air electrode catalyst
An air electrode and air battery technology, which is applied in battery electrodes, fuel cell-type half-cells and primary cell-type half-cells, circuits, etc., can solve the problems of limited large-scale practical application, limited catalytic activity, and small specific surface area. , to achieve the effect of small particle size, high catalytic activity and large specific surface area
Inactive Publication Date: 2020-09-08
JILIN NORMAL UNIV
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Problems solved by technology
[0004] Traditional synthesis methods of perovskite catalysts (e.g., solid-phase synthesis, molten salt method, and co-precipitation method) usually can only obtain perovskite catalysts with large particle size, small specific surface area, and few morphological features. Limited, limiting its large-scale practical applications (e.g., metal-air batteries, electrolyzed water, solid oxide fuel cells)
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Embodiment 1
[0028] Embodiment 1: The air electrode catalyst of an aluminum-air battery and its preparation method in this embodiment are carried out according to the following steps:
[0029] (a) Weigh 0.866g of lanthanum nitrate hexahydrate, 0.635g of strontium nitrate, 1.019g of cobalt nitrate hexahydrate, 0.404g of ferric nitrate nonahydrate and 0.269g of niobium oxalate, add 200ml of deionized water to form a metal salt solution, which is recorded as solution A.
[0030] (b). Weigh 1.576g of citric acid and add it to solution A, stir to dissolve, and record it as solution B.
[0031] (c) Weigh 0.292g of ethylenediaminetetraacetic acid and add it to solution B, then add ammonia water to adjust the pH of the solution to 4, and stir for 0.5-1 hour.
[0032] (d). The solution obtained in step (c) is continuously stirred in a water bath at 80°C until a gel is formed, and then the gel is placed in an oven at 90°C to dry for 12 hours to form a gel-like precursor.
[0033] (e). Raise the precursor at ...
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Abstract
The invention discloses a nano perovskite air electrode catalyst of an aluminum-air battery and a preparation method of the nano perovskite air electrode catalyst, and belongs to the technical field of aluminum-air battery preparation. In allusion to the problems that the perovskite catalyst prepared by the existing preparation method is large in particle size, small in specific surface area and less in morphological characteristics, a perovskite type catalyst La0.4Sr0.6Co0.7Fe0.2Nb0.1O3 is synthesized by using a sol-gel method. The catalyst has the advantages of small particle size, uniform size, large specific surface area, good repeatability, high catalytic activity, stable physical and chemical properties, cheap and easily available medicines and the like, the temperature required formaterial preparation is low, the time is short, the raw material cost is low, the preparation process is environment-friendly, and industrial production is easy. The La0.4Sr0.6Co0.7Fe0.2Nb0.1O3 can beused as an air electrode catalyst of an aluminum-air battery. The aluminum-air battery prepared by the method has the advantages of high discharge voltage, good stability and the like. The preparation process provided by the invention is simple, easy to control and beneficial to large-scale batch production.
Description
Technical field [0001] The invention belongs to the technical field of aluminum-air battery preparation, and specifically relates to an air electrode catalyst of an aluminum-air battery and a preparation method thereof. Background technique [0002] Modern society is currently in a transitional stage from a fossil fuel-based economy to clean energy needed to reduce environmental pollution. Therefore, some renewable energy sources are being developed, such as solar, wind and hydropower. Among these new energy storage systems, metal-air batteries have attracted much attention due to their high energy density, large capacity, low cost (depending on the metal anode), and constant discharge voltage. However, the oxygen reduction reaction kinetics is slow, which requires additional energy (overpotential) to overcome the kinetic obstacles of these reactions, and the energy efficiency of these devices is greatly reduced, thus limiting the commercialization of these energy devices. Ther...
Claims
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IPC IPC(8): H01M4/88H01M4/90H01M12/06
CPCH01M4/9016H01M4/8878H01M4/8882H01M12/06
Inventor 徐娜于龙娇孙梦真耿多徐占林
Owner JILIN NORMAL UNIV