Mercury-free zinc pulp compound and mercury-free zinc air battery with compound

Abstract

The invention relates to a mercury-free zinc pulp compound and a mercury-free zinc air battery with the compound and belongs to the field of the battery. The battery structure thereof comprises a mercury-free zinc cathode slurry, anode and cathode shells, a sealing rubber ring, a diaphragm, an anode pole and a diffusion paper; the mercury-free zinc cathode slurry is prepared from mercury-free zinc powder, inorganic gel, organic gel, surfactant, conductive macromolecule and electrolyte; the surfactant is prepared from one or more of alkyl benzene sulfonic acid, alkylbenzene carboxylic acid or derivative thereof and polyoxyenyl ether derivative. Under the condition of no mercury addition, the surfactant can enhance the interaction between the zinc powder and the zinc powder in the zinc slurry, and the lower internal resistance state in the zinc slurry still can be maintained at the rear discharging end, so that the use ratio of the zinc powder can be greatly increased and the discharge capacity and the discharge time of the zinc air battery can be increased.

Description

technical field [0001] The invention discloses a mercury-free zinc paste composition and a mercury-free zinc-air battery with the composition, belonging to the field of batteries. Background technique [0002] The ever-increasing demand for energy has flooded all aspects of life, and small portable devices such as watches, hearing aids, and Bluetooth headsets require high-capacity button batteries to provide energy for them. Due to the high capacity and low cost of zinc-air batteries, most hearing aids currently on the market mainly rely on button-type zinc-air primary batteries to provide energy. [0003] Zinc-air battery is a metal-air battery that relies on the positive air zinc oxide negative electrode to provide energy. Its advantages lie in high capacity and low cost. In the production process of zinc-air batteries, zinc powder is made into a slurry and used as a negative electrode. In order to reduce hydrogen generation and enhance battery conductivity, about 1wt% of...

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Problems solved by technology

However, when mercury is no longer added to the zinc powder, it will inevitably lead to the generation of more gas and the increase of the internal resistance of the battery, especially in the later stage of discharge, the conductive zinc active material will gradually convert into non-conductive zinc oxide, and the internal resistance will increase. If it is too large, it will further affect the chemical reaction of the battery, resulting in a decrease in the utilization efficiency of zinc powder and a greatly reduced discharge capacity.

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