Electrolyte for high-safety aluminum air battery and preparation method of electrolyte

An aluminum-air battery, high-safety technology, applied in the field of electrochemistry, can solve the problems of cumbersome preparation process and high energy consumption, and achieve the effects of promoting oxidative dissolution and increasing discharge potential

Pending Publication Date: 2022-07-05
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aluminum negative electrode alloying requires high-temperature melting treatment of aluminum and the addition of various elements to compound, which requires high energy consumption and cumbersome preparation process

Method used

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  • Electrolyte for high-safety aluminum air battery and preparation method of electrolyte

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Prepare 2 mol / L sodium chloride aqueous solution, add anhydrous gallium chloride, stir and dissolve, so that the concentration of anhydrous gallium chloride is 0.1 mol / L.

[0017] The prepared electrolyte is added to the aluminum-air battery, the negative electrode is industrial pure aluminum, the positive electrode is a commercial air electrode, and the main components are manganese dioxide, acetylene black, and nickel mesh. Connect the positive and negative electrodes of the battery to the electrochemical workstation for data collection, and calculate the mass loss of the aluminum sheet before and after discharge. The test results are as follows:

[0018] The measured discharge potential is 0.63V, the capacity density is 2242.90Ah / kg, and the energy density is 1428.10Wh / kg.

Embodiment 2

[0020] A 2 mol / L sodium chloride aqueous solution is prepared, anhydrous gallium chloride is added, and the solution is stirred to dissolve, so that the concentration of anhydrous gallium chloride is 0.15 mol / L.

[0021] The prepared electrolyte is added to the aluminum-air battery, the negative electrode is industrial pure aluminum, the positive electrode is a commercial air electrode, and the main components are manganese dioxide, acetylene black, and nickel mesh. Connect the positive and negative electrodes of the battery to the electrochemical workstation for data collection, and calculate the mass loss of the aluminum sheet before and after discharge. The test results are as follows:

[0022] The measured discharge potential is 0.79V, the capacity density is 1933.28Ah / kg, and the energy density is 1685.18Wh / kg.

Embodiment 3

[0024] A 2 mol / L sodium chloride aqueous solution was prepared, anhydrous gallium chloride was added, and the solution was stirred to dissolve, so that the concentration of anhydrous gallium chloride was 0.2 mol / L.

[0025] The prepared electrolyte is added to the aluminum-air battery, the negative electrode is industrial pure aluminum, the positive electrode is a commercial air electrode, and the main components are manganese dioxide, acetylene black, and nickel mesh. Connect the positive and negative electrodes of the battery to the electrochemical workstation for data collection, and calculate the mass loss of the aluminum sheet before and after discharge. The test results are as follows:

[0026] The measured discharge potential is 0.97V, the capacity density is 1482.42Ah / kg, and the energy density is 1762.22Wh / kg.

[0027] Test the discharge potential curve of each aluminum-air battery within 2h, and the test method of current density is as follows:

[0028] Connect the ...

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Abstract

According to the electrolyte for the high-safety aluminum air battery and the preparation method of the electrolyte, anhydrous gallium chloride is added into the neutral (NaCl) electrolyte, so that an aluminum plate is promoted to be oxidized and dissolved, the discharge potential (about 0.97 V) of the aluminum air battery is improved, and the application possibility of the aluminum air battery is achieved.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to an electrolyte for high-safety aluminum-air batteries and a preparation method thereof. Background technique [0002] Aluminum-air batteries have attracted extensive attention due to their high safety, low cost, environmental friendliness, and high theoretical specific energy (8100 Wh / kg). During the discharge process, the aluminum negative electrode is consumed and oxidized, and the oxygen in the air is reduced to OH as the positive electrode. - , the electrons flow from the negative electrode to the positive electrode through the external circuit. [0003] The electrolyte of aluminum-air battery consists of neutral aqueous solution or alkaline aqueous solution. When using alkaline electrolyte, although the discharge potential is higher than that of neutral electrolyte, the pH of the solution is very high, and the safety of use is greatly reduced. Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06
CPCH01M12/06H01M2300/0002H01M2300/0088
Inventor 胡文彬吴忠顾莹莹邓意达
Owner TIANJIN UNIV
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