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Aluminum-air battery electrolyte compound additive and aluminum-air battery electrolyte and preparation method of aluminum-air battery electrolyte

A technology of compounding additives and electrolytes, which is applied in the direction of fuel cell half-cells and primary battery-type half-cells, can solve problems such as environmental pollution and complex components, meet safety and environmental protection requirements, and have simple composition and good performance Effect

Inactive Publication Date: 2016-06-29
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the present invention provides an aluminum-air battery electrolyte compound additive and its electrolyte and a preparation method. The aluminum-air battery electrolyte compound additive and its electrolysis The solution and the preparation method solve the technical problem that the compound additive of the aluminum-air battery electrolyte has complex components and pollutes the environment in the prior art

Method used

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  • Aluminum-air battery electrolyte compound additive and aluminum-air battery electrolyte and preparation method of aluminum-air battery electrolyte
  • Aluminum-air battery electrolyte compound additive and aluminum-air battery electrolyte and preparation method of aluminum-air battery electrolyte
  • Aluminum-air battery electrolyte compound additive and aluminum-air battery electrolyte and preparation method of aluminum-air battery electrolyte

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Embodiment 1

[0028] In the aluminum-air battery electrolyte additive in this embodiment, the mother liquid of the electrolyte is a 4M sodium hydroxide solution, and the additive adopts ADA with a concentration of 0.5-5 mM. The preparation method of the electrolyte is as follows: prepare a 4M sodium hydroxide solution, cool to room temperature, add ADA, and stir to dissolve.

[0029] The polarization curve and AC impedance of the AA5052 aluminum alloy anode in the above electrolyte were tested by electrochemical testing, and the results are shown in figure 1 (A) and figure 1 (B), the temperature is controlled at 25℃.

[0030] by figure 1 (A) and figure 1 (B) It can be seen that after adding ADA, the corrosion potential shifts slightly, the hydrogen evolution corrosion rate decreases, the corrosion current density decreases, and the arc radius of the impedance increases. It can be seen that the corrosion rate of the AA5052 aluminum alloy in the electrolyte of this embodiment has been reduced.

Embodiment 2

[0032] In the aluminum-air battery electrolyte additive in this embodiment, the mother liquid of the electrolyte is a 4M sodium hydroxide solution, and the additive is ZnO with a concentration of 0.1-1.0 mM. The preparation method of the electrolyte is as follows: prepare a sodium hydroxide solution with a concentration of 4M, cool to room temperature, add ZnO, and stir to dissolve.

[0033] The polarization curve and AC impedance of the AA5052 aluminum alloy anode in the above electrolyte were tested by electrochemical testing, and the results are shown in figure 2 (A) and figure 2 (B), the temperature is controlled at 25℃.

[0034] by figure 2 (A) and figure 2 (B) It can be seen that after adding ZnO, the corrosion potential shifts negatively, the hydrogen evolution corrosion rate decreases, the corrosion current density decreases, and the arc radius of the impedance increases. It can be seen that the corrosion rate of the AA5052 aluminum alloy in the electrolyte of this embo...

Embodiment 3

[0036] In the aluminum-air battery electrolyte compound additive in this embodiment, the mother liquid of the electrolyte is a 4M sodium hydroxide solution, the additive adopts ADA with a solubility of 5mM, and the compound added with ZnO has a solubility of 0.1-1.0Mm. The preparation method of the electrolyte is as follows: prepare a sodium hydroxide solution with a concentration of 4M, cool to room temperature, add 5mM ADA, and after complete dissolution, add different concentrations of ZnO and stir to dissolve.

[0037] The polarization curve and AC impedance of the AA5052 aluminum alloy anode in the above electrolyte were tested by electrochemical testing, and the results are shown in image 3 (A) and image 3 (B), the temperature is controlled at 25℃.

[0038] by image 3 (A) and image 3 (B) It can be seen that after adding the compound additives ZnO and ADA, the corrosion potential shifts negatively, the hydrogen evolution corrosion rate decreases, the corrosion current densi...

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Abstract

The invention provides an aluminum-air battery electrolyte compound additive, which is prepared from adipic acid and zinc oxide, wherein the molar ratio of the adipic acid to the zinc oxide is (0.5-5.0) to (0.1-1.0). The invention further provides an aluminum-air battery electrolyte. The aluminum-air battery electrolyte is prepared from sodium hydroxide, the adipic acid, the zinc oxide and water; in the electrolyte, the concentration of the sodium hydroxide is 4M; the concentration of the adipic acid is 0.5-5.0mM; the concentration of the zinc oxide is 0.1-1.0mM; and the remainder is water. The invention further provides a preparation method of the aluminum-air battery compound electrolyte. The method can effectively inhibit hydrogen-evolution self-corrosion of an aluminum alloy anode, can negatively shift an open circuit potential of the aluminum alloy anode; in a constant-current discharge test, the aluminum alloy anode has good discharge performance, meets the discharge requirements of an alkaline aluminum-air battery and has a good development prospect.

Description

Technical field [0001] The invention belongs to the field of chemical fuel cells, and in particular relates to an aluminum-air battery electrolyte compound additive and a preparation method thereof. Background technique [0002] The aluminum-air battery is a semi-fuel cell with aluminum and its alloys as the anode and the air electrode as the cathode. It has the advantages of environmental friendliness, high specific energy, and short charging time, and its application is becoming more and more extensive. The electrolyte of aluminum-air battery is generally neutral electrolyte, non-aqueous electrolyte and alkaline electrolyte. In neutral and non-aqueous electrolytes, the aluminum anode will undergo severe passivation, causing the electrode potential of the aluminum anode to rise. In the alkaline electrolyte, the aluminum anode undergoes hydrogen evolution self-corrosion and polarization, which reduces the discharge efficiency of the aluminum anode. This is the most important ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06
CPCH01M12/06
Inventor 张大全王大鹏高立新
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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