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Method for preparing thin thermal battery electrolyte pole piece based on slurry coating method

A thermal battery and electrolyte technology, which is applied to the electrodes of primary batteries, non-flowing electrolytes, delayed action cells, etc., can solve the problem that the electrolyte pole piece cannot be thinned, and achieve the effects of low cost, improved performance, and uniform coating

Inactive Publication Date: 2015-06-03
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing thin thermal battery electrolyte pole pieces based on the slurry coating method, which solves the problem that the thermal battery electrolyte pole pieces cannot be thinned in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of homogeneous slurry for hot battery electrolyte: In a drying room with a humidity 7 h 16 The organic dispersant was mixed according to the ratio, and mechanically stirred at a speed of 1500r / min for 30 minutes to obtain a uniform slurry of the heated battery electrolyte; the above ratios are all percentages by mass.

[0024] On the surface-treated graphite paper, coat a 50um thick thermal battery electrolyte homogeneous slurry at a speed of 45cm / min, and dry it in a vacuum oven at 100°C for 30min; Press for 4 minutes to obtain a thin thermal battery electrolyte pole piece; the thickness of the pole piece is 30 um.

Embodiment 2

[0026] Preparation of hot battery electrolyte homogeneous slurry: In a glove box, mix LiCl, LiBr and KBr mixture 20%, epoxy resin binder 0.2% and C 2 h 6 O organic dispersant 79.8% is mixed according to the proportion, with a rotating speed of 300r / min, magnetically stirred for 24h, to obtain a uniform slurry of the battery electrolyte; The mass percentage of LiBr is 12%, the mass percentage of LiBr is 37%, and the mass percentage of KBr is 51%.

[0027] On the surface-treated metal foil, a uniform slurry of hot battery electrolyte with a thickness of 100um is coated at a speed of 20cm / min, and it is cured in a vacuum oven at 25°C for 24h; then the prepared sample is placed under a pressure of 15Mpa Press for 30 seconds to obtain a thin thermal battery electrolyte pole piece; the thickness of the pole piece is 50 um.

Embodiment 3

[0029] Preparation of homogeneous slurry for hot battery electrolyte: In a dry room with humidity 4 h 7 15% NO organic dispersant was mixed according to the above ratio, and stirred magnetically for 2 hours at a speed of 1000r / min to obtain a homogeneous slurry of battery electrolyte; the above ratios are all mass percentages; wherein, in the mixture of KCl and LiCl, the The mass percentage is 60%, and the mass percentage of LiCl is 40%.

[0030] On the surface-treated glass fiber, coat a 400um thick thermal battery electrolyte homogeneous slurry at a speed of 5cm / min, and dry it in a vacuum oven at 60°C for 10h to cure; then prepare the sample under a pressure of 2Mpa Press for 5 minutes to obtain a thin thermal battery electrolyte pole piece; the thickness of the pole piece is 150 um.

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Abstract

The invention belongs to the field of battery manufacturing, and in particular relates to a method for preparing a thin thermal battery electrolyte pole piece based on a slurry coating method. The method comprises the following steps: mixing thermal battery electrolyte powder material, an adhesive and an organic dispersing agent so as to form uniform slurry, coating the slurry on a conductive substrate, molding, drying, and curing, thereby obtaining the thin thermal battery electrolyte pole piece. Compared with a conventional powder tabletting forming process, the method is relatively low in cost, simple in process and applicable to large-scale industrial product, is innovative in the small-size / thinning field of thermal batteries, and has very high values for promoting development of the national defense industry, the thickness of the thin thermal battery electrolyte pole piece prepared by using the method can be reduced by 1 / 3-1 / 2, and the thickness of the thin thermal battery electrolyte pole piece can be adjusted within dozens of to hundreds of micrometers.

Description

technical field [0001] The invention belongs to the field of battery manufacturing, and in particular relates to a method for preparing thin thermal battery electrolyte pole pieces based on a slurry coating method. Background technique [0002] The thermal battery is a primary reserve battery, which has the advantages of high power, large output current, long storage time and good environmental adaptability. It is the most widely used reserve battery in military equipment and the largest amount of equipment; Preparation by powder pressing process, that is: evenly sprinkle electrode powder material on the substrate, and then apply pressure to shape; due to the poor self-supporting property of the powder, the pole piece cannot be made very thin, and the large diameter pole piece cannot be formed. has become a bottleneck in the miniaturization of thermal batteries. [0003] Patent application number 201410328708.X discloses "Preparation method of high-potential composite thin-...

Claims

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Application Information

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IPC IPC(8): H01M4/08H01M6/22H01M6/36
CPCH01M4/08H01M6/22H01M6/36
Inventor 邓亚锋刘波兰伟杨开敏李科刘效疆
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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