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Enhanced anti-oxidation conductive additive, lead-acid battery positive electrode paste and preparation method

A technology of lead-acid battery and positive electrode paste, which is applied in the direction of lead-acid battery, battery electrode, electrode manufacturing, etc. It can solve the problems of short service life, sliming and falling off, and achieve not easy sliming and falling off, increased conductivity, and stability high effect

Active Publication Date: 2021-08-10
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention aims to provide an enhanced anti-oxidation conductive additive, a positive lead paste for a lead-acid battery and a preparation method thereof, so as to solve the problem that the positive plate of the existing lead-acid battery is conductive due to carbon-containing substances after being used for a period of time. The agent is oxidized in a strong positive oxidation environment, and there are defects such as sliming and falling off, and a short service life.

Method used

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  • Enhanced anti-oxidation conductive additive, lead-acid battery positive electrode paste and preparation method
  • Enhanced anti-oxidation conductive additive, lead-acid battery positive electrode paste and preparation method
  • Enhanced anti-oxidation conductive additive, lead-acid battery positive electrode paste and preparation method

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preparation example Construction

[0037] The present invention also provides a preparation method of enhanced antioxidant conductive agent, comprising the following process:

[0038]Add 10-20 parts by mass of graphite powder to 70-80 parts by mass of ethanol solution, then add 1-2 parts by mass of metal conductive ceramic MAX powder, and ball mill for 3-5 hours at a speed of 800-1000r / min in a high-energy ball mill , and the obtained mixture is dried at 80° C. to 110° C., that is, an enhanced anti-oxidation conductive agent is obtained.

[0039] The existing conductive agent is a carbon-containing conductive agent, such as graphite, which is the most commonly used, but due to the high voltage of the positive electrode, the graphite will be oxidized soon during the use of the battery. The present invention adopts metal conductive ceramic MAX powder material After coating, it can prevent the oxidation of graphite.

[0040] In the high-energy ball mill of the present invention, ball mill at a speed of 800-1000r / ...

Embodiment 1

[0065] This embodiment provides a positive lead paste for lead-acid batteries, which can be used for deep cycle power, comprising the following steps:

[0066] Step 1, preparing enhanced antioxidant conductive agent;

[0067] Specifically, the preparation method of the enhanced anti-oxidation conductive agent is as follows: add 10 parts of flake graphite by mass to 73 parts of ethanol solution, then add 2 parts of metal conductive ceramic MAX powder, and grind it in a high-energy ball mill at 800 / min The speed of ball milling was 5 hours, and the obtained mixture was dried at 100° C. for 1.5 hours to obtain an enhanced antioxidant conductive agent.

[0068] In step 1, metal conductive ceramic MAX powder is Ti 3 AlC 2 .

[0069] Step 2, dry mixing the components of the positive lead paste;

[0070] Specifically, 75 parts of lead powder calculated by mass ratio, 10 parts of deionized water, 5 parts of red lead, 6 parts of dilute sulfuric acid, 1 part of stannous sulfate, 1 p...

Embodiment 2

[0076] This embodiment provides a lead-acid battery positive electrode paste, which is mainly used for deep cycle power, including the following steps:

[0077] Step 1, preparing enhanced antioxidant conductive agent;

[0078] Specifically, the preparation method of the enhanced anti-oxidation conductive agent is as follows: add 15 parts of graphite flakes by mass to 80 parts of ethanol solution, then add 1 part of metal conductive ceramic MAX powder, and grind in a high-energy ball mill at 100 / min The speed of ball milling was 4h, and the obtained mixture was dried at 100°C to obtain an enhanced anti-oxidation conductive agent.

[0079] In the above step 1, the metal conductive ceramic MAX powder is Ti 2 AlC.

[0080] Step 2, dry mixing the components of the positive lead paste;

[0081] Specifically, 80 parts of lead powder, 8 parts of deionized water, 5 parts of red lead, 6 parts of dilute sulfuric acid, 0.5 parts of stannous sulfate, 1 part of antimony trioxide, enhance...

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Abstract

The invention relates to an enhanced anti-oxidation conductive auxiliary agent, a positive lead paste for a lead-acid battery and a preparation method thereof, belonging to the field of lead-acid batteries, and solves the problem that the positive plate of the existing lead-acid battery is damaged due to carbon-containing conductive agents after being used for a period of time. It is oxidized in an extremely strong oxidizing environment, and there are defects such as mud falling off and short service life. The invention provides an enhanced anti-oxidation conductive auxiliary agent and a lead-acid battery positive electrode paste; the enhanced anti-oxidation conductive auxiliary agent is graphite coated with a metal conductive ceramic MAX phase; each component of the lead-acid battery positive electrode paste and its quality The parts are 75-85 parts of lead powder, 10-20 parts of deionized water, 5-10 parts of red lead, 6-10 parts of dilute sulfuric acid, 0.5-1 part of stannous sulfate, 0.5-2 parts of antimony oxide, 0.05-0.1 part of short fiber, 2-5 parts of enhanced anti-oxidation conductive additive. The positive electrode paste of the lead-acid storage battery of the present invention can effectively improve the formation efficiency of the battery and shorten the formation time, resist oxidation during the use of the battery, overcome the muddy problem of the electrode plate in the later stage of the battery, and prolong the service life of the battery.

Description

technical field [0001] The invention relates to the field of lead-acid storage batteries, in particular to an enhanced anti-oxidation conductive additive, a positive lead paste of a lead-acid storage battery and a preparation method. Background technique [0002] Lead-acid batteries are widely used in the fields of automobile starting, energy storage and power due to their advantages of good charge and discharge performance, safety and reliability, low price and recyclable use. In recent years, due to the guidance of national policies and the impact of lithium ions on the lead-acid battery market, it is urgent to improve the specific energy and cycle life of lead-acid batteries. After dissecting and analyzing the failed batteries, more than half of the deep-cycle power lead-acid batteries failed due to the muddying and shedding of the positive active material. [0003] At present, the positive electrode paste of most lead-acid batteries is composed of lead powder, conductiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M4/57H01M4/04H01M10/06
CPCH01M4/04H01M4/57H01M4/624H01M4/625H01M10/06Y02E60/10
Inventor 阙奕鹏丁元军殷思思余杰
Owner CHAOWEI POWER CO LTD
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