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Iodine-doped derivative porous carbon composite material and preparation method thereof

A composite material, porous carbon technology, used in the preparation/purification of carbon, iodine, iodine/hydrogen iodide, etc., can solve the problems of poor electrical conductivity and poor thermal stability, achieve good electrical conductivity, improve electrical conductivity, and cheap raw materials easy-to-get effect

Inactive Publication Date: 2022-03-04
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of ZPC / I 2 The composite material and its preparation method are aimed at overcoming the poor conductivity, poor thermal stability and iodine substance (I 2 , I - and I 3 - ) has the disadvantage of the shuttle effect

Method used

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  • Iodine-doped derivative porous carbon composite material and preparation method thereof
  • Iodine-doped derivative porous carbon composite material and preparation method thereof
  • Iodine-doped derivative porous carbon composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] This embodiment provides a ZPC / I 2 Methods of preparation of composite materials.

[0042] First take 2.68 g of Zn(NO 3 ) 2 •6H 2O and 0.66 g of 2-methylimidazole were respectively dissolved in 100 mL of methanol, and stirred vigorously for 15 minutes to form a solution; then the two solutions were mixed, stirred at room temperature for 1 hour and then allowed to stand for 12 hours; the centrifuged white The crystals were washed several times with methanol and then dried at 60°C for 12 hours. The synthesized ZIF-8 product was placed in N 2 In the atmosphere, the calcination temperature is 900° C., and the heating rate is 5° C. / min. After 4 hours of calcination, ZPC is obtained. Disperse pure iodine in an ethanol solution, then add ZPC to the solution, and control the weight ratio of iodine and ZPC to 1:1; next, dry and volatilize the product at 40°C to remove ethanol, and then dry and volatilize the product at 130°C in an Ar atmosphere Heating; finally heating at ...

Embodiment 2

[0044] This embodiment provides a ZPC / I 2 Methods of preparation of composite materials.

[0045] First take 2.56 g of Zn(NO 3 ) 2 •6H 2 O and 0.63 g of 2-methylimidazole were dissolved in 100 mL of methanol respectively, and stirred vigorously for 15 minutes to form a solution; then the two solutions were mixed, stirred at room temperature for 1 hour and then allowed to stand for 12 hours; the centrifuged white The crystals were washed several times with methanol and then dried at 60°C for 12 hours. The synthesized ZIF-8 product was placed in N 2 In the atmosphere, the calcination temperature is 800° C., the heating rate is 5° C. / min, and the ZPC is obtained after 4 hours of calcination. Disperse pure iodine in ethylene glycol solution, then add ZPC to the solution, and control the weight ratio of iodine and ZPC to 1:2; next, dry and volatilize the product at 40°C to remove ethanol, and then place it in an Ar atmosphere at 130 Heating at ℃; finally heating at 100℃ in ai...

Embodiment 3

[0047] This embodiment provides a ZPC / I 2 Methods of preparation of composite materials.

[0048] First take 2.73 g of Zn(NO 3 ) 2 •6H 2 O and 0.69 g of 2-methylimidazole were respectively dissolved in 100 mL of methanol, and stirred vigorously for 15 minutes to form a solution; then the two solutions were mixed, stirred at room temperature for 1 hour and then allowed to stand for 12 hours; the centrifuged white The crystals were washed several times with methanol and then dried at 60°C for 12 hours. The synthesized ZIF-8 product was placed in N 2 In the atmosphere, the calcination temperature is 900° C., and the heating rate is 5° C. / min. After 6 hours of calcination, ZPC is obtained. Disperse pure iodine in ethanol solution, then add ZPC to the solution, and control the weight ratio of iodine and ZPC to 1:2; next, dry and volatilize the product at 40°C to remove ethanol, and then dry and volatilize the product at 130°C in an Ar atmosphere Heating; finally heating at 10...

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Abstract

The invention relates to an iodine-doped derivative porous carbon (ZPC / I2) composite material and a preparation method thereof, and belongs to the technical field of battery electrode material preparation. A ZPC / I2 composite material is characterized in that a zeolite imidazate skeleton-8 (ZIF-8) is introduced in the preparation process to derive a porous carbon material, and the porous carbon material has a rich porous structure and a high-conductivity skeleton, and can provide effective iodine loading and allow rapid transmission of electrons. In addition, the existence of N, Zn and ZnO in the carbon skeleton can form chemical connection with iodine, so that the shuttle effect is reduced. The invention further provides a preparation method and application of the ZPC / I2 composite material, and the ZPC / I2 composite material is used as an electrode material of a battery. The preparation method of the ZPC / I2 composite material is simple, low in cost and beneficial to large-scale industrial production. The ZPC / I2 composite material has excellent rate capability and long cycle stability, and is suitable for being used as a battery electrode material.

Description

technical field [0001] The invention relates to an iodine-doped derived porous carbon composite material and a preparation method thereof, belonging to the technical field of battery electrode material preparation. Background technique [0002] At present, the energy crisis and environmental problems are becoming more and more serious, and the development of renewable energy and the improvement of energy storage systems have received extensive attention. As a battery cathode material, iodine has high specific capacity, high reaction potential and fast kinetic response, which make the metal-iodine battery system stand out. However, iodine has poor electrical conductivity, poor thermal stability and iodine species (I 2 , I - and I 3 - ) is still an obstacle to its practical application. Iodine species can diffuse through the separator and generate low-conductivity ZnI on the surface of the zinc metal anode through the shuttle effect 2 , leading to the loss of active iodi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B7/14H01M4/36H01M4/38H01M4/62
CPCC01B32/05C01B7/14H01M4/364H01M4/388H01M4/625Y02E60/10
Inventor 刘雪敏徐俊伟葛林恒刘伟良乔从德姚金水任慢慢
Owner QILU UNIV OF TECH
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