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Lithium thionyl chloride battery cathode sheet containing pitch coke activated carbon catalytic material and preparation method thereof

A technology of lithium thionyl chloride battery and catalytic material, which is applied to the electrodes of primary batteries and non-aqueous electrolyte batteries, etc., which can solve the problems of carbon electrode blockage, increase of battery contact resistance, and influence of electrolyte diffusion, etc., to improve discharge time and specific energy, good structural matching, and the effect of reducing packing density

Active Publication Date: 2020-04-28
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the metal phthalocyanine complex will block the carbon electrode, which will affect the diffusion of the electrolyte and increase the contact resistance of the battery.

Method used

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  • Lithium thionyl chloride battery cathode sheet containing pitch coke activated carbon catalytic material and preparation method thereof
  • Lithium thionyl chloride battery cathode sheet containing pitch coke activated carbon catalytic material and preparation method thereof
  • Lithium thionyl chloride battery cathode sheet containing pitch coke activated carbon catalytic material and preparation method thereof

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preparation example Construction

[0027] A method for preparing a lithium thionyl chloride battery cathode sheet containing a pitch coke activated carbon catalytic material disclosed by the invention comprises the following steps:

[0028] 1) First, take some pitch coke activated carbon, soak it in beaker A filled with concentrated nitric acid with a mass fraction of 30%, and keep it warm in a water bath. The purpose is to oxidize the pitch coke activated carbon so that its surface contains more functional groups , favoring SOCl 2 Reduction, then filtration, drying to obtain pretreated pitch coke activated carbon;

[0029] 2) Add 5-10g of deionized water into beaker B, then add 0.03-0.10g of PTFE emulsion, stir and dilute evenly to obtain PTFE dilution, which is ready for use;

[0030] 3) Mix the pretreated pitch coke activated carbon and acetylene black obtained in step 1) into the mortar, then gradually add the mixed PTFE dilution into the mortar, stir evenly, grind to a paste and transfer to the mortar. i...

Embodiment 1

[0043] A preparation method of lithium thionyl chloride battery cathode sheet containing pitch coke activated carbon catalytic material, comprising the following steps:

[0044] 1) First take pitch coke activated carbon (1000m 2 / g) several, soak it in the beaker A that is equipped with the concentrated nitric acid that mass fraction is 30%, heat preservation treatment in water bath 60 ℃, time 24 hours, filter, dry, obtain the pitch coke activated carbon after pretreatment;

[0045] 2) Add 6g deionized water to beaker B, then add 0.05g PTFE emulsion, stir and dilute to obtain PTFE dilution, stand-by;

[0046]3) Mix the pitch coke activated carbon and acetylene black treated in step 1) into the mortar according to the mass ratio of 4:100, then gradually add the mixed PTFE dilution into the mortar, stir evenly, and grind to a paste and transfer to an evaporating dish;

[0047] 4) Put the evaporating dish filled with the cathode mixture into an electric blast drying oven, and b...

Embodiment 2

[0054] A preparation method of lithium thionyl chloride battery cathode sheet containing pitch coke activated carbon catalytic material, comprising the following steps:

[0055] 1) First take pitch coke activated carbon (1000m 2 / g) several, soak it in the beaker A that is equipped with the concentrated nitric acid that mass fraction is 30%, heat preservation treatment in water bath 60 ℃, time 24 hours, filter, dry, obtain the pitch coke activated carbon after pretreatment;

[0056] 2) Add 6g deionized water to beaker B, then add 0.05g PTFE emulsion, stir and dilute to obtain PTFE dilution, stand-by;

[0057] 3) Mix the pitch coke activated carbon and acetylene black treated in step 1) and add them into the mortar according to the mass ratio of 6:100, then gradually add the mixed PTFE dilution into the mortar, stir evenly, and grind until it becomes a paste and transfer to an evaporating dish;

[0058] 4) Put the evaporating dish filled with the cathode mixture into an elect...

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Abstract

The invention discloses a lithium thionyl chloride battery cathode sheet containing a pitch coke activated carbon catalytic material and a preparation method of the lithium thionyl chloride battery cathode sheet. The preparation method comprises the steps of soaking pitch coke activated carbon in nitric acid, carrying out oxidation treatment, filtering, drying, uniformly mixing with acetylene black, adding a PTFE diluent, and baking to obtain a fiberized and formed cathode mixture; adding isopropanol or absolute ethyl alcohol into the fiberized and formed cathode mixture for soaking, pouring out redundant soaking liquid, then compacting and slitting the cathode mixture, and then pressing step by step to obtain a carbon electrode; and drying, pressing and slitting to obtain the cathode sheet. The method has the characteristics of simple operation, short period, low energy consumption, good stability, high yield and the like. The pitch coke activated carbon prepared by the method is usedas a Li / SOCl2 battery positive electrode catalytic material, a compact LiCl film formed on the surface of a carbon electrode can be reduced by regulating and controlling pores of a carbon positive electrode, and the discharge time and the specific energy of a battery are improved.

Description

technical field [0001] The invention belongs to Li / SOCl 2 The technical field of preparation of positive electrode catalytic materials for batteries, in particular to a lithium thionyl chloride battery cathode sheet containing pitch coke activated carbon catalytic materials and a preparation method thereof. Background technique [0002] Lithium / thionyl chloride (Li / SOCl 2 ) battery is a disposable inorganic non-aqueous electrolyte battery, its output voltage is as high as 3.65V, its theoretical specific energy is as high as 590W h / kg, and it can work and store for more than 10 years in the temperature range of -55℃~150℃ . And it has the characteristics of high shock and vibration resistance. Therefore, it is widely used as a special energy supply in the fields of aerospace, oil exploration, marine exploration, shipbuilding and heavy industry. [0003] During the discharge process, due to the SOCl inside the battery 2 The reduction rate of LiCl is too slow, so that the n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/08H01M6/14
CPCH01M4/08H01M6/14
Inventor 王小宪许占位肖荣林李康王文婧关伟伟严皓
Owner SHAANXI COAL & CHEM TECH INST
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