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Production process of lithium-ferrous disulfide battery anode

An iron disulfide battery and manufacturing process technology, which is applied to the electrodes of primary batteries, battery electrodes, circuits, etc., can solve the problems of broken belts and low adhesion of coatings, and achieve powder drop-off, high filling capacity, and large capacity Effect

Active Publication Date: 2010-06-09
ZHONGYIN NINGBO BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As a primary battery, a lithium-iron disulfide battery has many advantages, and has many characteristics of a primary lithium battery and a lithium-ion rechargeable battery, and has a wide range of applications. Broken band phenomenon, low adhesion performance of the coating

Method used

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  • Production process of lithium-ferrous disulfide battery anode
  • Production process of lithium-ferrous disulfide battery anode
  • Production process of lithium-ferrous disulfide battery anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Use 0.05mm thick stainless steel belt to punch to make stainless steel mesh, rough surface, make the mesh into rhombus, the diagonal length is 1mm and 2mm, arranged in staggered rules, the vertical distance between adjacent sides of each diamond mesh is 0.5mm , the mesh area accounts for about 52% of the stainless steel belt area.

[0041] The stainless steel mesh was washed with deionized water and dried by circulating air.

[0042] Preparation of semi-dry slurry: Mix 93% iron disulfide, 2.5% graphite, 1% acetylene black and 3.5% PTFE by mass, and then add NMP whose mass is 8 times that of PTFE to make a viscous paste Semi-dry slurry.

[0043] The coated stainless steel mesh is dried, and the thickness of the coating after drying is controlled at 0.40mm. Then, the stainless steel mesh is cut into a rectangle of 330mm×42mm, and then rolling and tab welding are performed to form the positive electrode sheet of the AA type battery.

[0044] Please refer to Figure 5 a...

Embodiment 2

[0046] Use 0.08mm thick aluminum strip to punch to make aluminum mesh, rough surface, make the mesh into a circle with a diameter of 1mm, in a staggered and regular arrangement, the distance between the center of each adjacent circular mesh in the horizontal or vertical row It is 2mm, and the mesh area accounts for about 50% of the area of ​​the stainless steel belt.

[0047] The aluminum mesh was washed with deionized water and dried by circulating air.

[0048] Preparation of semi-dry slurry: Mix 92% iron disulfide, 2% graphite, 1% acetylene black, 1% carbon black and 4% CMC by mass, and then add 9.5 times the mass of CMC. Ionized water to make a viscous semi-dry slurry.

[0049] The coated aluminum mesh is dried, and the thickness of the coating after drying is controlled at 0.35mm. Then, cut the aluminum mesh into a rectangle of 330mm×42mm, and then roll and weld the tabs to make the positive electrode sheet of the AA type battery.

Embodiment 3

[0051] Use 0.10mm thick nickel tape to punch to make aluminum mesh, the surface is roughened, the mesh is made into a rectangle, the length x width is 2mm x 1mm, it is arranged in a staggered order, and the long sides of the adjacent rectangular mesh in the vertical row are vertical. The distance is 0.5mm, the distance between two adjacent vertical rows is 0.5mm, and the mesh area accounts for about 60% of the area of ​​the stainless steel strip.

[0052] The nickel mesh was washed with deionized water and dried by circulating air.

[0053] Preparation of semi-dry slurry: Mix 94% iron disulfide, 1.5% graphite, 2% acetylene black and 4.5% PVDF by mass, and then add NMP whose mass is 9 times that of PVDF to make a viscous paste Semi-dry slurry.

[0054] The coated nickel mesh was dried, and the thickness of the coating after drying was controlled at 0.3 mm. Then, the nickel mesh was cut into a rectangle of 330mm×42mm, and then rolled and tab welded to form an AA-type battery p...

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Abstract

The invention provides a production process of a lithium-ferrous disulfide battery anode, comprising the following steps of: (a) integrally punching a metal strap to form a metal mesh; (b) cleaning and drying the metal mesh; (c) preparing half-dry sizing and coating the sizing on the meta mesh, wherein the half-dry sizing is prepared from ferrous disulfide, a conductive agent and a caking agent; (d) drying the coated metal mesh; and (e) cutting, rolling and welding the dried metal mesh by using electrode lugs. By using the metal mesh as anode matrix and coating the prepared half-dry sizing on the metal mesh to obtain an anode plate, the production process of the lithium-ferrous disulfide battery anode solves the problem that strap breaking easily generates in the coating process; the coating on the anode plate has favorable adhering performance; powder of the anode plate is not easy to fall in the preparation and winding process; the consumption of solvent for stirring the sizing is less; the filling quantity of active substances is high; and the capacity of batteries is larger.

Description

technical field [0001] The invention relates to the technical field of preparation of lithium batteries, in particular to a manufacturing process of a positive electrode of a lithium-iron disulfide battery. Background technique [0002] Today's electronic technology and digital technology develop rapidly, and its technological progress and development directly affect the development of the corresponding power supply. Chemical power sources, namely batteries, have been widely used. The development trend of electronic and digital technology is gradually moving towards miniaturization, multi-function and portability, so its power battery is also required to have high specific energy, high specific power, long service life and easy to use. [0003] Primary battery, also called dry battery, is a kind of battery. Commonly used ordinary zinc-manganese batteries and alkaline zinc-manganese batteries in primary batteries have certain deficiencies under storage and heavy load operatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/08H01M4/62
CPCY02E60/12
Inventor 李海波郁宇骏马祖华
Owner ZHONGYIN NINGBO BATTERY CO LTD
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