Slurry coating process-based method for preparing thin thermal battery positive electrode and electrolyte combination electrode piece

A technology for positive pole pieces and thermal batteries, which is applied in the field of preparing thin thermal battery positive poles and electrolyte composite pole pieces based on the slurry coating method, can solve the problems of non-coating forming, uneven coating, complicated process, etc., and achieve electric Improved chemical performance, good uniformity, and simple process

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

This method uses an insoluble electrolyte to prepare an emulsion, and forms a diaphragm layer by suction filtration. It is not a coating molding technology in essence, and the process is relatively complicated.
Moreover, the electrolyte emulsion prepared by this method is not high in composition uniformity, and it is easy to cause uneven coating during suction filtration molding, and the coating cannot be made very thin, and it is difficult to achieve thinning of thermal battery pole pieces
In addition, the electrolyte slurry prepared by this method does not add a binder, so it cannot be directly coated on the positive electrode, and needs to be filtered or transferred to the positive electrode layer, resulting in poor bond strength between the two layers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of homogeneous slurry for positive electrode of thermal battery: uniform slurry for positive electrode of thermal battery is composed of the following components in mass percentage: FeS 2 15%, epoxy resin binder 5%, and deionized water 80%; in the natural environment, the FeS 2 1. Epoxy resin binder and deionized water are mixed according to the above ratio, and mechanically stirred for 30 minutes at a speed of 1500 r / min to prepare.

[0029] Preparation of homogeneous slurry of hot battery molten salt electrolyte: hot battery molten salt electrolyte homogeneous slurry is composed of the following components in mass percentage: 45% mixture of KCl and LiCl, 10% epoxy resin binder and C 7 h 16 Dispersant 45%; In the mixture of KCl and LiCl, the mass percentage of KCl is 40%, the mass percentage of LiCl is 60%; In the glove box, the mixture of KCl and LiCl, epoxy resin binder and C 7 h 16 The dispersant was mixed according to the above ratio, and mechanica...

Embodiment 2

[0032] Preparation of homogeneous slurry for thermal battery positive electrode: thermal battery positive electrode slurry is composed of the following components in mass percentage: CoS 2 40%, sodium silicate binder 10% and deionized water 50%; in a dry room with humidity 2 , sodium silicate binder and deionized water are mixed according to the above ratio, and magnetically stirred at a speed of 300r / min for 24h to prepare.

[0033] Preparation of homogeneous slurry of hot battery molten salt electrolyte: hot battery molten salt electrolyte slurry is composed of the following components in mass percentage: LiCl, LiBr and KBr mixture 15%, polytetrafluoroethylene emulsion binder 5% and C 4 h 10 O dispersant 80%; in the mixture of LiCl, LiBr and KBr, the mass percent of LiCl is 5%, the mass percent of LiBr is 35%, the mass percent of KBr is 60%; In the drying room of humidity4 h 10 The O dispersant was mixed according to the above ratio, and was prepared by magnetic stirring a...

Embodiment 3

[0036] Preparation of uniform slurry for positive electrode of thermal battery: The uniform slurry for positive electrode of thermal battery is composed of the following components in mass percentage: CoS 2 80%, PTFE emulsion binder 0.2% and deionized water 19.8%; in the glove box, the CoS 2 , polytetrafluoroethylene emulsion binder and deionized water are mixed according to the above ratio, and mechanically stirred at a speed of 1000r / min for 2h to prepare.

[0037] Preparation of hot battery molten salt electrolyte homogeneous slurry: hot battery molten salt electrolyte homogeneous slurry is composed of the following components in mass percentage: 80% mixture of KCl and LiCl, 0.2% polyvinylidene fluoride binder and C 5 h 9 NO dispersant 19.8%; In the mixture of KCl and LiCl, the mass percentage of KCl is 50%, and the mass percentage of LiCl is 50%; In the glove box, the mixture of KCl and LiCl, polyvinylidene fluoride binding agent and C 5 h 9 The NO dispersant was mixe...

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PUM

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Abstract

The invention belongs to the field of battery manufacturing, and particularly relates to a slurry coating process-based method for preparing a thin thermal battery positive electrode and electrolyte combination electrode piece. The method comprises the steps: preparing homogeneous thermal battery positive electrode slurry, then coating a conducting substrate with the homogeneous thermal battery positive electrode slurry, drying, solidifying and pressing to obtain a thin thermal battery positive electrode piece; and preparing homogeneous thermal battery fused salt electrolyte slurry, coating the thin thermal battery positive electrode piece with the homogeneous thermal battery fused salt electrolyte slurry in a lamination manner, drying, solidifying and pressing so as to obtain the thin thermal battery positive electrode and electrolyte combination electrode piece. The thin thermal battery positive electrode and electrolyte combination electrode piece prepared by adopting the method has the advantages that the thickness can be reduced by 1/3-1/2 and is adjustable in the range of tens of micrometers to hundreds of micrometers, and the combination electrode piece has very high values on creating a new way in miniaturizing and thinning thermal batteries and promoting development of national defense industries.

Description

technical field [0001] The invention belongs to the field of battery manufacturing, and in particular relates to a method for preparing a thin thermal battery cathode and an electrolyte combined pole piece 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 spread the electrode powder material on the conductive substrate, and then apply pressure to shape; due to the poor self-supporting property of the powder, it is difficult to make a combined pole piece, even if it can be made, the combined pole piece The sheet cannot be made very thin, and the combined electrode sheet with large diameter cannot be formed. These problems have become the bottl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/08H01M4/62H01M6/36
Inventor 邓亚锋魏华兰伟王帅杨开敏刘效疆
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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