Non-mercury pulp layered paper of zinc-manganese battery containing high-polymer solid electrolyte

Abstract

The present invention relates to one kind of slurry paper for no-mercury Zn-Mn cell with polymer electrolyte. The slurry paper includes base paper and slurry, and the slurry consists of one kind of polymer gel prepared with coordination ion liquid and organic mercury-replacing buffer liquid. The coordination ion liquid is prepared with urea, thiourea, zinc chloride and ammonium chloride; and the polymer gel is prepared with coordination ion liquid, PVA, PAM, PEG and crosslinking starch in certain proportion. The no-mercury Zn-Mn cell with polymer electrolyte can decrease the internal resistance of cell, improve dynamic discharge performance of cell, prolong the maintenance time and avoid environmental pollution caused by mercury.

Description

technical field [0001] The invention belongs to the technology of using mercury-free pulp layer paper containing novel polymer solid electrolyte to replace the mercury-containing pulp layer paper in the current battery in the production of dry batteries. Background technique [0002] The pulp layer paper plays the role of isolating the positive and negative electrode materials in the battery, allowing the electrolyte to pass through, absorbing a certain amount of electrolyte, and maintaining the normal discharge of the battery. The existing pulp layer paper is generally composed of base paper, adhesive, liquid retaining agent, paste and additives. Adhesives, liquid retaining agents and pastes are all water-absorbing polymer materials. Polyvinyl alcohol (PVA) is generally used as adhesive and barrier material. Carboxymethyl cellulose (CMC) sodium salt and polyacrylamide (PAM) are used as liquid retaining agent, and cross-linked starch and cross-linked etherified starch are ...

AI Technical Summary

Problems solved by technology

However, these polymer materials can conduct electricity only by absorbing the electrolyte solution, and the above-mentioned effect cannot be achieved when added in a small amount, and the resistance of the pulp layer paper is increased when added in a large amount, and the battery current and battery capacity are reduced.

Secondly, the gelatinization of cross-linked starch can only be fully gelatinized, absorb the electrolyte, and improve the ionic conductivity only at high electrolyte concentration and low pH value; when the electrolyte concentration is low and the pH value is high, it cannot fully swell, so only Can be used in "high power" P-type batteries

Doesn't work to its full potential in "high-capacity" C-type batteries

Third, due to the slow liquid absorption speed, low swelling degree and poor liquid retention of the pulp-layer paper prepared by the existing slurry, the requirements for the base paper are relatively strict, otherwise high-quality pulp-layer paper cannot be produced

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