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Electrolyte for aluminum-air battery and aluminum-air battery

An aluminum-air battery and electrolyte technology, which is applied in the direction of fuel cell half-cells, primary battery half-cells, secondary batteries, aqueous electrolytes, etc., can solve the problems of positive potential shift, decreased conductivity, and reduced anode utilization And other issues

Pending Publication Date: 2019-07-26
CHANGZHOU YOUTEKE NEW ENERGY TECH
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Problems solved by technology

[0003] According to different electrolyte systems, aluminum-air batteries are generally divided into alkaline and neutral. Among them, the alkaline electrolyte is usually NaOH or KOH solution, but the self-corrosion rate of aluminum in a strong alkaline solution is very large, reducing the The utilization rate of the anode is improved; the neutral electrolyte is generally NaCl or KCl solution, although the hydrogen evolution corrosion is reduced, but the conductivity is low, resulting in low battery voltage
In addition, whether it is alkaline or neutral system, the final product is Al(OH) 3 , too much Al(OH) 3 It will reduce the conductivity of the electrolyte, increase the viscosity, increase the polarization of the aluminum anode, and shift the potential positively.

Method used

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  • Electrolyte for aluminum-air battery and aluminum-air battery

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Embodiment Construction

[0013] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

[0014] In the following examples and comparative examples, potassium fluoride and potassium chloride are analytically pure. The formulations of Examples 1-4 and Comparative Examples are shown in Table 1.

[0015] Table 1 (unit: parts by weight)

[0016] components Example 1 Example 2 Example 3 Example 4 comparative example potassium fluoride 20 10 5 5 potassium chloride 12 12 12 15 12 water 68 78 83 80 88

[0017] The electrolytes of Examples 1-4 and Comparative Examples were prepared respecti...

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Abstract

The invention discloses an electrolyte for an aluminum-air battery and the aluminum-air battery. The electrolyte comprises the following components in percentage by weight: 5-20 wt% of potassium fluoride, 10-15 wt% of potassium chloride and the balance of water. The potassium fluoride is compounded with potassium chloride to form the electrolyte, so that the working potential of the battery is improved, the corrosion to an aluminum plate is small, and the advantages of alkaline electrolyte and neutral electrolyte can be both combined.

Description

technical field [0001] The invention relates to the technical field of aluminum-air batteries, in particular to an electrolyte solution for an aluminum-air battery and an aluminum-air battery using the electrolyte. Background technique [0002] Aluminum-air batteries use aluminum and oxygen in the air as electrode active materials, and have many advantages such as high electrochemical equivalent, abundant resources, and low price. During the discharge process, the aluminum anode is oxidized, electrons flow to the cathode through the external circuit, and oxygen captures electrons at the air electrode to undergo a reduction reaction to generate OH - , thereby releasing electrical energy. [0003] According to different electrolyte systems, aluminum-air batteries are generally divided into alkaline and neutral. Among them, the alkaline electrolyte is usually NaOH or KOH solution, but the self-corrosion rate of aluminum in a strong alkaline solution is very large, reducing the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06H01M10/0568
CPCH01M10/0568H01M12/06H01M2300/0002Y02E60/10
Inventor 宋永江
Owner CHANGZHOU YOUTEKE NEW ENERGY TECH
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