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Alkali-resisting diaphragm material capable of rapidly absorbing liquid and production method thereof

A diaphragm material and product technology, applied in the field of rapid liquid-absorbing and alkali-resistant diaphragm materials, can solve problems such as diaphragm shrinkage, battery short circuit, and short circuit

Active Publication Date: 2016-11-23
CHINA NAT PULP & PAPER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The diaphragm is an important part of the plate group in the battery pack. It can form sufficient electrochemical reaction process, ion migration channel and ensure enough electrolyte to participate in the reaction after absorbing the electrolyte. Therefore, the liquid absorption speed of the diaphragm directly affects the battery. The activation time of the battery pack; the electrolyte of the zinc-silver reserve battery pack is a highly corrosive potassium hydroxide aqueous solution. When the diaphragm is corroded and degraded in the electrolyte, it will cause a short circuit between the positive and negative electrodes, resulting in the failure of the battery pack. Therefore, the durability of the diaphragm Alkali stability is one of the necessary conditions for the battery pack to work for a long time; in addition, the electrolyte is 30% concentrated alkali solution, which will cause strong swelling of the fiber, shrinkage and deformation, and then cause shrinkage of the diaphragm. damage itself, causing a short circuit in the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The modified fiber was soaked in water in advance with a concentration of 20%; then it was refined with a refiner at a speed of 2750 r / min. The specific operation is to grind once with a knife spacing of 0.5mm, grind once with the same concentration of knife spacing of 0.3mm, and grind twice with the same concentration of knife spacing of 0.1mm; the time required for grinding once is 6 minutes; The degree of beating is 29°SR, and it is reserved. The tencel specification is 5mm, and the treatment is the same as that of the modified fiber, and the final beating degree is 30°SR, which is ready for use. The pulp mixing tank is calculated on the basis of 1.2kg absolute dry pulp, weighed respectively according to the fiber ratio (modified fiber 40%, Tencel 5%, vinylon 55%), and mix evenly in the pulp mixing tank; then add the wet strength agent Stir for 10 minutes, and then use a test-type fourdrinier paper machine with a design width of 200mm for papermaking, with a speed o...

Embodiment 2

[0016] The modified fiber was soaked in water in advance with a concentration of 25%; then it was refined with a refiner at a speed of 2750r / min; the specific operation was to grind once with a knife spacing of 0.5mm, and to grind once at the same concentration of knife spacing of 0.3mm. The same concentration of 0.1mm knife spacing 2 times; after that, use a beater to even out, and the beating degree of the pulp is 27°SR, and it is ready for use. The specification of the tencel is 38mm, the knife spacing starts at 1.0mm, then 0.8-0.5-0.3 each once, and then 0.1mm twice; the time required for grinding 1 time is 10min; after that, it is evened with a beater, and the beating degree of pulping is 29 °SR, spare. The pulp mixing tank is calculated on the basis of 1.0kg absolute dry pulp, weighed respectively according to the fiber ratio (45% of modified fiber, 10% of tencel, 45% of vinylon) and mixed evenly in the mixing tank; then add the wet strength agent Stir for 10 minutes, a...

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Abstract

The invention discloses an alkali-resisting diaphragm material capable of rapidly absorbing liquid and a production method thereof. The method comprises the steps that cellulose triacetate is grafted to modified fiber, vinylon and tencel of a sulfonic acid group and a polyacrylamide wet strength agent, water is added, the mixture is mixed to be uniform, the product is diluted and thicken, molding, squeezing, drying, reeling, press polish management and other steps are carried out on a fourdrinier machine, and a paper functional material is obtained. The product has the advantages of being good in alkali resistance stability, high in liquid absorbing speed, small in shrinkage, long in working time and the like, is mainly applicable to a battery pack matched with a chemical power source and is short in activation time, and the service life of equipment is greatly prolonged.

Description

technical field [0001] The invention relates to a rapid liquid-absorbing alkali-resistant diaphragm material and a production method thereof. Background technique [0002] In recent years, with the development of high-mobility long-range cruise missile weapons, the power system on the missile requires the supporting chemical power supply to provide more durable power in time to achieve the purpose of accurately and quickly attacking long-range targets. Activation and long-lived properties. At present, killer weapons such as advanced cruise missiles, new-generation cruise missiles, and top-level maritime cruise technology missiles require the supporting power supply to be able to supply power within 1.5s, and the longest working time can reach 12000s. 2 to 4 times the time. [0003] The diaphragm is an important part of the plate group in the battery pack. It can form sufficient electrochemical reaction process, ion migration channel and ensure enough electrolyte to partici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M2/14
CPCH01M50/403H01M50/411H01M50/44Y02E60/10
Inventor 陈雪峰许跃刘文毛宗久孟凡锦万莹及维孟鹏涛
Owner CHINA NAT PULP & PAPER RES INST CO LTD
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