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A kind of preparation method of lithium thionyl chloride power battery positive electrode

A technology of lithium thionyl chloride power and battery positive electrode, applied in the electrode, positive electrode, active material electrode of primary battery, etc., can solve the problems of easy powder falling off, micro-short circuit, shortening service life, etc., to increase the active area and porosity, uniform particle size distribution, and the effect of improving reactivity

Active Publication Date: 2017-03-15
武汉孚安特科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is difficult to turn the material into powder only by sieving, and there are many large particles or agglomerated substances, so even if these so-called powder materials are rolled onto the nickel mesh, their adhesion is poor , easy to fall off powder, thus affecting the quality of the positive plate, after this kind of positive plate is made into a battery, the battery is prone to short circuit or micro short circuit, which reduces the service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Powder pretreatment

[0034] Mix 1000g of acetylene black, 0.6g of absolute alcohol, 60g of positive electrode conductive copper powder, 70g of polytetrafluoroethylene emulsion binder, and 3g of pure water into a wet material and stir evenly;

[0035] The evenly stirred wet material is dried at 100°C for 10 hours;

[0036] After being pulverized by a pulverizer at a speed of 1000r / min, it is dried at 100°C for 10 hours;

[0037] Vacuum dry at 160°C for 30 minutes to obtain powder;

[0038] 2) powder online

[0039] Mix the powder and alcohol evenly in a mass ratio of 1:0.2 to form a semi-dry powder;

[0040] The semi-dry powder is evenly sprinkled on both sides of the nickel expanded mesh through the impeller feeder, and the powder is bonded to the nickel expanded mesh through the rolling mill;

[0041] Put the nickel mesh with semi-dry powder into the vacuum drying oven at 120°C for 8 hours;

[0042] The positive nickel mesh was placed in an oven at 240°C for 1...

Embodiment 2

[0046] 1) Powder pretreatment

[0047] Mix 1000g of acetylene black, 1g of absolute alcohol, 80g of positive electrode conductive nickel powder, 80g of vinylidene fluoride emulsion binder, and 3.5g of pure water into a wet material and stir evenly;

[0048] The evenly stirred wet material is dried at 120°C for 20 hours;

[0049] After being pulverized by a pulverizer at a speed of 1200r / min, it is dried at 100°C for 6 hours;

[0050] Vacuum dry at 160°C for 30 minutes to obtain powder;

[0051] 2) powder online

[0052] Mix the powder and pure water evenly at a mass ratio of 1:0.25 to form a semi-dry powder;

[0053] The semi-dry powder is evenly sprinkled on both sides of the nickel expanded mesh through the impeller feeder, and the powder is bonded to the nickel expanded mesh through the rolling mill;

[0054] Put the nickel mesh with semi-dry powder on it into a vacuum drying oven at 120°C for 9 hours;

[0055] The positive nickel mesh was placed in an oven at 250°C fo...

Embodiment 3

[0059] 1) Powder pretreatment

[0060] Mix 1000g of acetylene black, 0.8g of absolute alcohol, 70g of positive electrode conductor platinum powder, 75g of polyacrylic acid emulsion binder, and 3.2g of pure water into a wet material and stir evenly;

[0061] The evenly stirred wet material is dried at 150°C for 15 hours;

[0062] After being pulverized by a pulverizer at a speed of 1100r / min, it is dried at 100°C for 7 hours;

[0063] Vacuum dry at 160°C for 30 minutes to obtain powder;

[0064] 2) powder online

[0065] Evenly mix the powder with alcohol and pure water at a mass ratio of 1:0.1:0.1 to form a semi-dry powder;

[0066] The semi-dry powder is evenly sprinkled on both sides of the nickel expanded mesh through the impeller feeder, and the powder is bonded to the nickel expanded mesh through the rolling mill;

[0067] Put the nickel mesh with semi-dry powder into the vacuum drying oven at 120°C for 10 hours;

[0068] The positive nickel mesh was placed in an oven ...

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Abstract

The invention discloses a preparation method of a lithium thionyl chloride power type battery positive electrode. The method is finished by three steps of powder pretreatment, powder screening and positive electrode molding. Half-dry powder is adopted to be screened; fibrillation is carried out by heating for a plurality of times, so that the powder can be in a loose and porous form; the active area and porosity of a positive carbon electrode are increased; and the reaction activity is improved.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a method for preparing a positive electrode of a lithium thionyl chloride power battery. Background technique [0002] Lithium thionyl chloride battery is an electrochemical system power source with lithium metal as the negative electrode, liquid thionyl chloride as the positive electrode active material, and porous carbon as the positive electrode current collector. Among them, SOCl 2 It is both a reaction substance and a non-aqueous inorganic solvent, dissolving LiAlCl 4 The solution after adding additives is an inorganic electrolyte. This system battery is a new type of high-energy chemical power source developed in recent years. The overall reaction mechanism is: 4Li+2SOCl 2 →4LiCl+S+SO 2 , due to the generation of insoluble solid products LiCl and S, as the discharge progresses, the surface and inner pores of porous carbon are gradually covered and blocked by insoluble s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M6/14H01M4/06H01M4/08
CPCH01M4/06H01M4/08H01M6/14H01M2004/028
Inventor 代江华杨辉
Owner 武汉孚安特科技有限公司
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