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Application of porphyrin as catalyst in li/socl2 battery and battery

A catalyst and porphyrin technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, secondary batteries, etc.

Inactive Publication Date: 2011-11-30
王君龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the research on catalysts for thionyl chloride batteries, everyone has focused on phthalocyanine complexes, but porphyrin has not been reported as a catalyst for thionyl chloride batteries.

Method used

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  • Application of porphyrin as catalyst in li/socl2 battery and battery
  • Application of porphyrin as catalyst in li/socl2 battery and battery
  • Application of porphyrin as catalyst in li/socl2 battery and battery

Examples

Experimental program
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Effect test

Embodiment 1

[0019] 1.1 Synthesis of tetraphenyl zinc porphyrin (Zn(TPP))

[0020] The synthesis is divided into two steps (for the synthesis process, see figure 1 ), the first step, at first synthesize tetraphenylporphyrin, adopt mature Alder propionic acid method, concrete operation steps are: add 300mL propionic acid in 500mL three-necked bottle, then 6.08mL (60mmol) benzaldehyde is dissolved in 15mL Add propionic acid to the reactor, stir, and heat until the propionic acid refluxes, and then add 10 mL of propionic acid solution in which 4.16 mL (60 mmoL) of pyrrole is dissolved in the reactor within 15 min. The solution turned brownish black, continued to react in the dark for 1 hour, removed the heating induction cooker, let it stand for cooling, evaporated all the propionic acid under reduced pressure, and evaporated to dryness as much as possible, added 200mL of ethanol to the reactor, and left it in the refrigerator overnight. The next day, vacuum filtration was performed, and the...

Embodiment 2

[0029] 2.1Zn(TPP) used in lithium / thionyl chloride battery performance test

[0030] Zn(TPP) as catalyst for Li / SOCl 2 Battery, test the discharge curve of the battery before and after adding the catalyst. The specific test conditions are: ensure that the battery is assembled in a dry air environment with a relative humidity 4 / SOCl 2 , The positive and negative electrodes are separated by PP film. Under the protection of nitrogen, the metal porphyrin complex Zn(TPP) (2-2.5 mg) was added to 1 mL of electrolyte solution of the battery, and at the same time, it was uniformly dispersed in the electrolyte in ultrasonic waves. The battery test conditions are: ambient temperature 23-25°C, constant resistance 40Ω, average current density 70mA / cm 2 , continuously discharge until the voltage drops to 2V, and test the relationship between the output voltage and time of the battery respectively.

[0031] 2.2 Zn(TPP) on Li / SOCl 2 Impact on battery performance

[0032] Li / SOCl 2 Bat...

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Abstract

The invention discloses the application of porphyrin as a catalyst in Li / SOCl2 batteries. Both porphyrin and phthalocyanine are highly conjugated compounds containing macrocycles with similar catalytic properties. In thionyl chloride electrolyte, due to the influence of the polarity of the solution, the solubility of porphyrin is higher than that of phthalocyanine, which is beneficial to more More porphyrins participate in the catalytic reaction of the battery, which is beneficial to the transfer of electrons in the battery reaction. Using Zn(TPP) as a catalyst to catalyze Li / SOCl2 battery can effectively improve the open circuit voltage, battery capacity and average voltage of the battery. The solubility of porphyrin complexes in SOCl2 electrolyte is larger than that of phthalocyanine complexes, therefore, it is more beneficial for more metalloporphyrins to participate in the electron transfer reaction of the battery.

Description

technical field [0001] The present invention relates to porphyrin as catalyst in Li / SOCl 2 Applications in batteries and batteries, belonging to the field of electrochemical technology, especially Li / SOCl 2 The field of battery technology. Background technique [0002] Lithium / thionyl chloride battery is a kind of disposable battery with high specific energy, which is widely used in military affairs. The open circuit voltage of lithium / thionyl chloride battery can reach 3.65V, and the working voltage is generally around 3.3V. At the same time, it also has the characteristics of long discharge time, long storage life, good low temperature performance, and stable negative voltage. A macrocyclic complex with a conjugated structure (such as: phthalocyanine), added to the battery electrolyte, can effectively reduce the internal resistance of the battery, which is beneficial to the improvement of the open circuit voltage of the battery and the prolongation of the discharge time....

Claims

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Application Information

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IPC IPC(8): H01M10/0563B01J31/22
CPCY02E60/12Y02E60/10
Inventor 王君龙李珺吕向菲
Owner 王君龙
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