Lithium thionyl chloride battery positive electrode and preparation method thereof

A technology of lithium thionyl chloride battery and battery positive electrode, which is applied to battery electrodes, non-aqueous electrolyte battery electrodes, circuits, etc. It can solve the problems of difficult dispersion of carbon nanotubes, uneven powder, large electrode polarization, etc., and achieve It is easy to process into electrode sheets, disperse and evenly compound the amount, and increase the output voltage effect

Inactive Publication Date: 2017-01-11
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the hydrophobic characteristics of carbon nanotubes and other conductive materials used in the positive electrode of the battery, carbon nanotubes and other materials are not easily dispersed in water, and the powder obtained by mechanical mixing of acetylene black and carbon nanotubes is uneven, resulting in the obtained The electrode polarization is large
like figure 1 As shown, when the mass fraction of carbon nanotubes is 25%, the carbon film prepared by mechanical mixing method has poor strength and many holes, indicating that mechanical mixing has poor processing effect on materials such as acetylene black and carbon nanotubes with poor hydrophobicity.

Method used

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  • Lithium thionyl chloride battery positive electrode and preparation method thereof
  • Lithium thionyl chloride battery positive electrode and preparation method thereof

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Effect test

Embodiment 1

[0019] Embodiment 1: a lithium thionyl chloride battery positive electrode, comprising acetylene black, carbon nanotubes and polytetrafluoroethylene emulsion, the preparation method of the electrode comprises the following steps:

[0020] (1) Mechanical ball milling: Put 90g of acetylene black and 5g of carbon nanotubes into a ball milling tank respectively, and use the method of mechanical ball milling to mill them for 1 hour respectively;

[0021] (2) Ultrasonic dispersion: add the two powders obtained in step 1) into 900ml and 100ml of deionized water respectively, then add 4.5g and 0.5g of polytetrafluoroethylene emulsion respectively, and place them in an ultrasonic cleaning machine for ultrasonic dispersion , sonicate for 30 minutes, so that the polytetrafluoroethylene and the powder are evenly dispersed in the water;

[0022] (3) Ultrasonic stirring: Mix the two dispersions obtained in step 2) and ultrasonically stir for 30 minutes at a power of 80W;

[0023] (4) Sucti...

Embodiment 2

[0027] Embodiment 2: a lithium thionyl chloride battery positive electrode, comprising acetylene black, carbon nanotubes and polytetrafluoroethylene emulsion, the preparation method of the electrode comprises the following steps:

[0028] (1) Mechanical ball milling: put 80 g of acetylene black and 15 g of carbon nanotubes into a ball milling tank, and use mechanical ball milling to mill them for 1 hour;

[0029] (2) Ultrasonic dispersion: Add the two powders obtained in step 1) into 800ml and 200ml of deionized water respectively, then add 4g and 1g of polytetrafluoroethylene emulsion respectively, place them in an ultrasonic cleaning machine for ultrasonic dispersion, and ultrasonically Treat for 30 minutes to disperse polytetrafluoroethylene and powder evenly in water;

[0030] (3) Ultrasonic stirring: Mix the two dispersions obtained in step 2) and ultrasonically stir for 30 minutes at a power of 80W;

[0031] (4) Suction filtration: Suction filtration is performed on the...

Embodiment 3

[0035] Embodiment 3: a lithium thionyl chloride battery positive electrode, comprising acetylene black, carbon nanotubes and polytetrafluoroethylene emulsion, the preparation method of the electrode comprises the following steps:

[0036] (1) Mechanical ball milling: Put 70g of acetylene black and 25g of carbon nanotubes into a ball milling tank respectively, and use the method of mechanical ball milling to mill them for 1 hour respectively;

[0037] (2) Ultrasonic dispersion: add the two powders obtained in step 1) into 700ml and 300ml of deionized water respectively, then add 3.5g and 1.5g of polytetrafluoroethylene emulsion respectively, and place them in an ultrasonic cleaning machine for ultrasonic dispersion , sonicate for 30 minutes, so that the polytetrafluoroethylene and the powder are evenly dispersed in the water;

[0038] (3) Ultrasonic stirring: Mix the two dispersions obtained in step 2) and ultrasonically stir for 30 minutes at a power of 80W;

[0039] (4) Suct...

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Abstract

The invention discloses a lithium thionyl chloride battery positive electrode and a preparation method thereof. The lithium thionyl chloride battery positive electrode contains a conductive material represented by acetylene black and carbon nano tube, wherein the weight parts of the acetylene black and the carbon nano tube are as follows: 70-90 of acetylene black and 25-5 of carbon nano tube. A carbon film of a composite positive electrode is prepared by mixing the acetylene black with the liquid phase of the carbon nano tube, and the prepared carbon positive electrode has good conductivity, while the polarization of a carbon electrode is reduced due to increase of conductivity, thus improving the electrical properties of the electrode; the voltage increasing amount of the battery reaches 20mV, and the capacity increase amount reaches 1.3Ah, and therefore, the battery positive electrode prepared according to a liquid phase mixing method promotes the working voltage and capacity of the battery.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a positive electrode of a lithium thionyl chloride battery, and also to a method for preparing the positive electrode of a lithium thionyl chloride battery. Background technique [0002] Lithium thionyl chloride battery is a battery with the highest working voltage (3.6V) and the highest actual output specific energy (590W·h / Kg) in the practical primary battery series, and is widely used in civil and military aerospace fields . Due to the hydrophobic characteristics of carbon nanotubes and other conductive materials used in the positive electrode of the battery, carbon nanotubes and other materials are not easily dispersed in water, and the powder obtained by mechanical mixing of acetylene black and carbon nanotubes is uneven, resulting in The electrode polarization is large. Such as figure 1 As shown, when the mass fraction of carbon nanotubes is 25%, the carbon film prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/133H01M4/139H01M4/1393H01M4/36
CPCH01M4/13H01M4/133H01M4/139H01M4/1393H01M4/364Y02E60/10
Inventor 谭思平魏俊华陈铤王庆杰赵洪楷万伟华钱顺友蔡波
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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