A kind of aluminum-air battery electrolyte composite additive and preparation method thereof

An empty battery and electrolyte technology, which is applied in the field of aluminum-empty battery electrolyte compound additive and its preparation, and electrolyte additive field, can solve the problems of unsatisfactory environmental protection, complex composition, environmental pollution, etc., and achieves simple structure and good development. Promising, low-cost effects

Active Publication Date: 2017-05-31
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For general compound additives, its components are complex, resulting in a waste of resources, and some components pollute the environment, which does not meet the requirements of environmental protection

Method used

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  • A kind of aluminum-air battery electrolyte composite additive and preparation method thereof
  • A kind of aluminum-air battery electrolyte composite additive and preparation method thereof
  • A kind of aluminum-air battery electrolyte composite additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The aluminum-air battery electrolyte composite additive in this embodiment, wherein the mother solution of the electrolyte is a 4mol / L sodium hydroxide solution, and the additive is sodium carboxymethylcellulose (CMC) with a concentration of 10-10000mg / L . The preparation method of the electrolyte is as follows: configure a sodium hydroxide solution with a concentration of 4 mol / L, cool to room temperature, add CMC, and stir to dissolve.

[0026] The hydrogen evolution corrosion rate of the AA5052 aluminum alloy anode in the electrolyte prepared in this example was tested by the collected gas method, and the test time was 30 minutes. The results are shown in Table 1. 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), figure 2 (a) and Table 2, the temperature is controlled at 25°C.

[0027] From Table 1, Table 2, figure 1 (a) and figu...

Embodiment 2

[0029] The aluminum-air battery electrolyte composite additive in this embodiment, wherein the mother liquid of the electrolyte is 4mol / L sodium hydroxide solution, and zinc oxide (ZnO) is used as the additive with a concentration of 1-8g / L. The preparation method of the electrolyte is as follows: prepare a sodium hydroxide solution with a concentration of 4 mol / L, cool to room temperature, add ZnO, and stir to dissolve.

[0030] The hydrogen evolution corrosion rate of the AA5052 aluminum alloy anode in the electrolyte prepared in this example was tested by the collected gas method, and the test time was 30 minutes. The results are shown in Table 1. The polarization curve and AC impedance of the AA5052 aluminum alloy anode in the above-mentioned electrolyte are tested by electrochemical testing, and the results are shown in Table 2, figure 1 (b) and figure 2 (b), the temperature is controlled at 25°C.

[0031] From Table 1, Table 2, figure 1 (b) and figure 2 (b) It can ...

Embodiment 3

[0033] The aluminum-air battery electrolyte compound additive in this embodiment, wherein the mother liquid of the electrolyte is 4mol / L sodium hydroxide solution, the additive adopts zinc oxide (ZnO), the concentration is 8g / L, compound and add CMC The solubility is 10-10000mg / L. The preparation method of the electrolyte is as follows: configure a sodium hydroxide solution with a concentration of 4mol / L, cool to room temperature, add 8g / LZnO, after completely dissolving, add CMC, and stir to dissolve.

[0034]The hydrogen evolution corrosion rate of the AA5052 aluminum alloy anode in the electrolyte prepared in this example was tested by the collected gas method, and the test time was 30 minutes. The results are shown in Table 1. The polarization curve and AC impedance of the AA5052 aluminum alloy anode in the above-mentioned electrolyte were tested by electrochemical testing, and the results are shown in Table 2, figure 1 (c) and figure 2 (c), the temperature is controlle...

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Abstract

The invention relates to a composite additive of an aluminum-air battery electrolyte. The composite additive comprises ZnO, carboxymethyl cellulose, sodium hydroxide and water; and in the additive, the concentration of the ZnO is (1-8)g / L, the concentration of the carboxymethyl cellulose is (10-10,000)mg / L, the concentration of the sodium hydroxide is (3-5)mol / L, and the balance is the water. The invention also provides a preparation method for the composite additive of the electrolyte. By the composite additive and the preparation method, the hydrogen evolution and self-corrosion rate of an aluminum-alloy anode can be effectively suppressed, and the open-circuit potential of the aluminum-alloy anode is also transferred; in a constant-current discharging test, when the current density is changed to 35mAcm<-2> from 5mAcm<-2>, the potential is changed to -1.38V from -1.5V; and the aluminum-alloy anode has favorable discharging performance, the requirement for discharging of the alkali aluminum-air battery is met, and the composite additive has very good development prospect.

Description

technical field [0001] The invention belongs to the field of chemical fuel cells, and in particular relates to an electrolyte additive, in particular to an aluminum-air battery electrolyte composite additive and a preparation method thereof. Background technique [0002] 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 electrolytes of aluminum-air batteries are generally neutral electrolytes, anhydrous electrolytes and alkaline electrolytes. In neutral and anhydrous electrolytes, the aluminum anode will be severely passivated, 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 alu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M12/06H01M6/04
CPCH01M6/045H01M12/06H01M2300/0014
Inventor 张大全王大鹏高立新
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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