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A kind of preparation method and battery device of aluminum-air battery cathode catalyst

A cathode catalyst and aluminum-air battery technology, applied in fuel cell half-cells and primary battery half-cells, battery electrodes, circuits, etc., can solve problems such as inability to achieve synergy

Active Publication Date: 2022-07-19
雄川氢能科技(广州)有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cobalt selenide is a relatively cheap catalyst, but its intrinsic activity for ORR is still far behind that of noble metal platinum-based materials. It only achieves "cost reduction" but cannot achieve "efficiency enhancement".

Method used

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  • A kind of preparation method and battery device of aluminum-air battery cathode catalyst
  • A kind of preparation method and battery device of aluminum-air battery cathode catalyst
  • A kind of preparation method and battery device of aluminum-air battery cathode catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An aluminum-air battery cathode catalyst, the preparation method of which comprises the following steps:

[0026] (1) Weigh 150 mg of acetylene black, 1.5 mmol of cobalt chloride hexahydrate, 0.03 mmol of lithium chloride and 1.53 mmol of sodium selenite, add them to 60 mL of deionized water and sonicate for 0.5 h to make them uniformly dispersed, and then add 8 50% hydrazine hydrazine solution, continue to be sonicated for 0.5 h, then transferred to the reaction kettle, and placed in an oven for a hydrothermal reaction with a reaction temperature of 140 °C and a reaction time of 16 h. Washed with ionized water, then dried in an oven at 50°C overnight;

[0027] (2) Transfer the dried sample in step (1) to a corundum porcelain boat, and then in a nitrogen protective atmosphere at 5 ℃ min -1 The heating rate was increased to 600 °C and maintained for 1 h for heat treatment to obtain the aluminum-air battery cathode catalyst, which was marked as Li x Co 1-x Se-AC.

Embodiment 2

[0029] In step (1), 0.01 mmol lithium chloride and 1.51 mmol sodium selenite were added; other preparation process and parameters were the same as in Example 1; marked as Li x Co 1-x Se-AC1.

Embodiment 3

[0031] In step (1), 0.02 mmol lithium chloride and 1.52 mmol sodium selenite were added; other preparation process and parameters were the same as in Example 1; marked as Li x Co 1-x Se-AC2.

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Abstract

The invention discloses a preparation method of an aluminum-air battery cathode catalyst, which comprises the following steps: according to the general formula Li x Co 1‑ x Se Weigh cobalt salt, lithium salt and sodium selenite respectively, add them to deionized water and ultrasonically disperse them uniformly, then add acetylene black and hydrazine solution, continue ultrasonication to obtain mixed precursor liquid; transfer it to the reaction In the kettle, and placed in an oven for heating, after the reaction, filtered, washed with deionized water, and dried overnight to obtain the precursor; the precursor was transferred to a corundum porcelain boat, and then heat-treated in an argon or nitrogen protective atmosphere to obtain aluminum Cathode catalyst for air battery, the open circuit potential of aluminum-air battery device is as high as 1.71 V, and the maximum power density also reaches 135.0 mW cm ‑2 .

Description

technical field [0001] The invention belongs to the technical field of application of cathode catalysts for aluminum-air batteries, and in particular relates to a preparation method and battery device of cathode catalysts for aluminum-air batteries. Background technique [0002] Aluminium-air battery is an emerging clean energy technology suitable for grid-free power supply for electric cars with a theoretical capacity of 2980 mAg g -1 , the theoretical energy density is as high as 8100 Wh kg -1 . However, the kinetics of the oxygen reduction reaction (ORR) in the air cathode of aluminum-air batteries is extremely slow, which is also one of the major obstacles to its large-scale industrialization at this stage. Precious metal platinum-based materials are considered to effectively reduce the reaction energy barrier of the ORR system and have efficient intrinsic activity for catalyzing ORR, but their platinum-based materials are scarce in distribution and require high cataly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/86H01M12/06
CPCH01M4/9083H01M4/8663H01M12/06H01M2004/8689
Inventor 张文山邱银忠张娜李锋邹新伟王领
Owner 雄川氢能科技(广州)有限责任公司
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