Method for preparing iron disulfide/carbon composite positive electrode material for disposable lithium battery and method for assembling button battery by using positive electrode material

A technology of iron disulfide, positive electrode material, applied in battery electrodes, circuits, electrical components, etc., to achieve the effect of reducing open circuit voltage, improving wettability and electronic conductivity, and increasing effective specific surface area

Inactive Publication Date: 2014-02-26
SHANDONG SHENGONGHAITE ELECTRONICS TECH
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  • Application Information

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Problems solved by technology

There is no report on the technology that can reduce the initial open circuit voltage without capacity consumption treatment when the battery is completed

Method used

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  • Method for preparing iron disulfide/carbon composite positive electrode material for disposable lithium battery and method for assembling button battery by using positive electrode material
  • Method for preparing iron disulfide/carbon composite positive electrode material for disposable lithium battery and method for assembling button battery by using positive electrode material

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preparation example Construction

[0026] The present invention as figure 1 , 2 As shown, a preparation method of iron disulfide / carbon composite positive electrode material for primary lithium battery, carbon element is coated on the surface of iron disulfide particles, the mass percentage content of iron disulfide is 75%~99.5%, the mass percentage of carbon element Content is 0.5%~25%, it is characterized in that: specific steps are as follows:

[0027] (1) Mix pyrite and carbon source material according to the mass ratio of (75~95): (5~60), disperse in dispersant and ball mill for 1~10h to obtain a mixed paste; (2) mix The mixed paste obtained in step (1) was dried in a vacuum drying oven at 80-150°C for 1-10 hours, and the dried precursor material was heated to 300-500°C for 1-8 hours under the protection of an inert gas, and then cooled to After sieving at room temperature, the iron disulfide / carbon composite positive electrode material for primary lithium batteries was obtained. In this embodiment, the...

Embodiment 1

[0033] Embodiment 1: The mass percentage content of iron disulfide in the carbon-coated iron disulfide composite positive electrode material is 75%, and the mass percentage content of carbon element is 25%, and the specific steps are as follows:

[0034] (1) Mix pyrite and starch in a mass ratio of 75:60, disperse in an appropriate amount of aqueous solution and ball mill for 8 hours to obtain a mixed paste;

[0035] (2) Dry the mixed paste obtained in step (1) in a vacuum drying oven at 120°C for 5 hours. The dried precursor material is heated to 400°C for 5 hours under the protection of an inert gas, then cooled to room temperature, and sieved A granular iron disulfide / carbon composite cathode material for a primary lithium battery is obtained.

Embodiment 2

[0036] Embodiment 2: The mass percentage content of iron disulfide is 90%, and the mass percentage content of carbon element is 10%. The specific steps are as follows: (1) mix pyrite and sucrose in a mass ratio of 90:24, disperse them in an aqueous solution and ball mill them for 5 hours to obtain a mixed paste; (2) mix the mixed paste obtained in step (1) The material was dried in a vacuum oven at 120°C for 5h, and the dried precursor material was heated to 400°C for 8h under the protection of an inert gas, then cooled to room temperature, and sieved to obtain a primary lithium battery iron disulfide / carbon composite positive electrode material .

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Abstract

The invention relates to a method for preparing an iron disulfide/carbon composite positive electrode material for a disposable lithium battery. According to the method, carbon covers the surfaces of iron disulfide particles, the mass percentage of iron disulfide is 75-99.5%, and the mass percentage of carbon is 0.5-25%. The method comprises the following specific steps: mixing pyrite and a carbon source substance according to the mass ratio of (75-95): (5-60), dispersing into a dispersing agent, and carrying out ball milling for 1-10 hours, so as to obtain a mixed paste material; drying the obtained mixed paste material for 1-10 hours in a vacuum drying oven at the temperature of 80-150 DEG C, heating the dried precursor material to the temperature of 300-500 DEG C under the protection of inert gas, maintaining for 1-8 hours, then, cooling to room temperature, and sifting, thereby obtaining the iron disulfide/carbon composite positive electrode material for the disposable lithium battery.

Description

technical field [0001] The invention relates to a preparation method of an iron disulfide / carbon composite positive electrode material for a primary lithium battery, and also relates to a method for assembling a button battery with the positive electrode material. Background technique [0002] With the development of electronic technology and information technology, the world pays more and more attention to environmental protection, and people put forward higher requirements for chemical power sources. Ordinary zinc-manganese batteries and alkaline manganese batteries can no longer meet the requirements of high-end electronic equipment. This is because When the alkaline battery is discharged at a constant current of 300mA~1000mA, the active material in the battery is prone to concentration polarization, which leads to an increase in the internal resistance of the battery and an increase in the internal consumption of the battery, making the battery unable to perform high-powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/1397
CPCY02E60/122H01M4/1397H01M4/366H01M4/5815H01M4/625Y02E60/10
Inventor 关成善宗继月孟博王晓卫杜显振
Owner SHANDONG SHENGONGHAITE ELECTRONICS TECH
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