Method for continuously coating high-viscosity sizing agent used for preparing positive pole piece of lithium-manganese primary cell

Abstract

The invention provides a method for continuously coating a high-viscosity sizing agent used for preparing a positive pole piece of a lithium-manganese primary cell, wherein thermally treated electrolyzed manganese dioxide is mixed with a conductive black, then deionized water or distilled water containing a polar alcohol solvent is added for continuous mixing to obtain a wet mixture, then an aqueous solution of a binder commonly used by a lithium battery is added for continuous mixing to obtain the high-viscosity sizing agent, the high-viscosity mixed sizing agent is prepared into particles, is rolled by a coating roller into a continuous piece, and is bonded on the two sides of a current collector after being rolled, so that a positive pole material piece with uniform thickness is continuously prepared, and the required positive pole piece can be obtained after the processes of drying, rolling, cutting and clearing the powder. According to the method for continuously coating the high-viscosity sizing agent used for preparing the positive pole piece of the lithium-manganese primary cell, the production efficiency and the production consistency are improved, the uniformity of the thickness of the material piece is guaranteed, and the performance of the pole piece is improved.

Description

technical field [0001] The invention relates to the field of manufacturing lithium-manganese primary batteries, in particular to a method for continuously coating high-viscosity slurry for preparing positive pole pieces of lithium-manganese primary batteries. Background technique [0002] Lithium metal primary battery is one of the series with the highest specific energy among known chemical power sources, and lithium manganese primary battery is the safest one. It has a wide range of applications in the radio frequency identification technology Internet of Things, smoke alarms, and smart electronic instruments. It has high security, high reliability, high specific energy, high environmental adaptability, and good storage performance (no voltage hysteresis) ) and superior cost performance. [0003] Existing coating methods for lithium-manganese primary batteries include roll pressing and paste coating. The rolling method is to fully mix manganese dioxide, conductive agent,...

AI Technical Summary

Problems solved by technology

Both of the above two methods have the following disadvantages: 1) Unable to work continuously and produce: the preparation process of the above two methods is discontinuous, the process is relatively complicated, and a large number of manual operations affect the production efficiency and the quality of the positive pole piece; 2) The rolling method is suitable for production Thick positive electrode sheet, and the paste method is suitable for producing thinner positive electrode sheet, but the thickness of the electrode sheet is not easy to control; 3) The rolling method needs to add graphite to increase the ductility of the sheet, which leads to a decrease in battery performance

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