Electrolyte for alkali aluminum air cell battery and matched electrolyte box thereof

Abstract

The invention discloses an electrolyte for alkali aluminum air cell battery and a matched electrolyte box thereof, and belongs to the technical field of the aluminum air cell battery. The electrolyteis composed of 2-8mol / L of potassium hydroxide or sodium hydroxide; 0.01-0.15mol / L of sodium stannate, 0.5-10g / L of alkali flocculant, and the balance of water. The lower part in the electrolyte box is partitioned into multiple chambers (6), and the upper sides of the multiple chambers are communicated; an electrolyte inlet is arranged at the upper part of one sidewall of the electrolyte box, andan electrolyte outlet is arranged at the upper part of the other sidewall of the electrolyte box; and an electrolyte inlet and the hydrogen exhaust port are arranged at the upper part of the electrolyte box. The alkali flocculant added in the electrolyte has no influence on the conductivity of the electrolyte, the viscosity and the conductivity and like physical performances of the electrolyte areunchanged after the alkali flocculant is added into the electrolyte to store for a long time; and meanwhile, the alkali flocculant has flocculation effect on the Al(OH)3 particles generated in the discharging process of the aluminum air cell, and the sediment speed of the Al(OH3) particles in the electrolyte box can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum-air batteries, and in particular relates to an electrolyte solution for an alkaline aluminum-air battery pack and a supporting electrolyte tank. Background technique [0002] Aluminum-air battery is a new type of chemical power source that uses aluminum and air (oxygen) as electrode active materials. It is an efficient, stable and environmentally friendly energy conversion device. When the aluminum-air battery is working, the aluminum alloy anode is continuously consumed to generate Al(OH) 3 , electrons flow to the cathode through the external circuit, and oxygen captures electrons at the air electrode for a reduction reaction to generate OH - , thereby releasing electrical energy. According to different electrolyte systems, aluminum-air batteries are generally divided into two systems: alkaline and neutral. The electrolyte in the alkaline system is usually NaOH and KOH aqueous solutions, and t...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the aluminum hydroxide particles in the inner cavity of the existing aluminum-air battery are easy to accumulate, and to provide an electrolyte for an alkaline aluminum-air battery pack and an electrolyte tank for supporting it. Effectively improve the accumulation of aluminum hydroxide particles in the inner cavity of the single cell when the aluminum-air battery pack is discharged at a high current, and accelerate the settlement of aluminum hydroxide particles generated during the reaction process of the aluminum-air battery pack

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