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Iron based metal organic framework compound / graphene composite and application thereof

An organic framework and iron-based metal technology, applied in the field of lithium-ion battery energy, can solve the problems of unsatisfactory fast charging and discharging, limited lithium ion deintercalation efficiency, long activation time, etc., and achieve low raw material prices and good cycle stability , Environmentally friendly effect

Active Publication Date: 2016-02-24
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Iron-based metal-organic framework compounds have a high capacity, and ferric iron is a hard Lewis acid, which has a strong binding ability with carboxyl groups, so it has a high structural stability. It is a new type of organic negative electrode material, but because the MOF material itself The lower conductivity limits the deintercalation efficiency of lithium ions in it, resulting in a longer activation time, which cannot meet the needs of fast charge and discharge, so it needs to be combined with materials with better conductivity to improve its characteristics

Method used

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  • Iron based metal organic framework compound / graphene composite and application thereof
  • Iron based metal organic framework compound / graphene composite and application thereof
  • Iron based metal organic framework compound / graphene composite and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 Sample 1 # and battery C1 # preparation of

[0035] sample 1 # Preparation of:

[0036] Add DMF (N,N-dimethylformamide) 60mL in the beaker, C 8 h 6 o 4 (terephthalic acid) 0.230g, FeCl 3 .6H 2 O (ferric chloride hexahydrate) 0.374g, anhydrous acetic acid 0.415g, and fully stirred, then transferred to a 100mL reaction kettle, placed in a blast drying oven at 150°C for 2h, and then separated Dry to obtain the iron-based metal-organic framework compound, which is designated as sample 1 # .

[0037] battery C1 # preparation of :

[0038] Weigh 0.0757g sample 1 # Put into the agate mortar, after grinding for 5 minutes, weigh 0.0223g of carbon black into the agate mortar, continue grinding for 10 minutes, then add 0.0124g of polyvinylidene fluoride binder (abbreviated as PVDF binder) , continue to grind for 40 minutes, then transfer to a 25mL glass bottle, add 2mL of N-methylpyrrolidone solution dropwise, place it in a magnetic stirrer and con...

Embodiment 2

[0039] Example 2 Sample 2 # and battery C2 # preparation of

[0040] sample 2 # Preparation of:

[0041] Take 30.4 mg of graphene in a glass beaker, and add 60 mL of DMF (N, N-dimethylformamide) to the beaker, and ultrasonically vibrate for 60 min to disperse it evenly; then add C 8 h 6 o 4 (terephthalic acid) 0.230g, FeCl 3 .6H 2 O (ferric chloride hexahydrate) 0.374g, anhydrous acetic acid 0.415g, and fully stirred, then transferred to a 100mL reaction kettle, placed in a blast drying oven at 150°C for 2h, and then separated Dry to obtain the iron-based metal-organic framework compound / graphene composite material, which is designated as sample 2 # . sample 2 # The weight percent content of graphene in the middle is 5wt%.

[0042] battery C2 # preparation of :

[0043] Weigh 0.0757g sample 2 # Put into the agate mortar, after grinding for 5 minutes, weigh 0.0223g of carbon black into the agate mortar, continue grinding for 10 minutes, then add 0.0124...

Embodiment 3

[0044] Example 3 Sample 3 # and battery C3 # preparation of

[0045] sample 3 # Preparation of:

[0046] Get 60.8mg of graphene in a glass beaker, and add DMF (N, N-dimethylformamide) 60mL in the beaker, ultrasonic vibration 60min, make it disperse evenly; Then add C 8 h 6 o 4 (terephthalic acid) 0.230g, FeCl 3 .6H 2 O (ferric chloride hexahydrate) 0.374g, anhydrous acetic acid 0.415g, and fully stirred, then transferred to a 100mL reaction kettle, placed in a blast drying oven at 150°C for 2h, and then separated Dry to obtain the iron-based metal-organic framework compound / graphene composite material, which is designated as sample 3 # . sample 3 # The weight percent content of graphene in the middle is 10wt%.

[0047] battery C3 # preparation of :

[0048] Weigh 0.0785g sample 3 # Put into the agate mortar and grind for 5 minutes, weigh 0.0224g of carbon black and add it into the agate mortar, continue grinding for 10 minutes, then add 0.0122g of pol...

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Abstract

The application discloses an iron based metal organic framework compound, an iron based metal organic framework compound / graphene composite formed by the compound and graphene, and application thereof in a lithium ion battery as a negative active material. The iron based metal organic framework compound and the iron based metal organic framework compound / graphene composite are used as the negative electrode active material for the lithium ion battery, and have the advantages of high capacity and good cycle stability.

Description

technical field [0001] The application relates to an iron-based metal-organic framework compound / graphene composite material and its application as a negative electrode active material in a lithium-ion battery, belonging to the field of lithium-ion battery energy. Background technique [0002] The energy crisis and environmental pollution are threatening the survival and development of human society. The development of new energy sources is imminent. Solar energy, wind energy, geothermal energy, bioenergy, and battery storage devices have become the focus of new energy sources. Among them, energy storage devices such as batteries play the dual important role of energy storage and release, and are the core part of electric vehicles, mobile phones, laptop computers, aerospace equipment and military electronic equipment. Batteries can meet the high-efficiency and fast power demand. Therefore, the development of new, efficient and cheap electrode materials has become one of the ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/60H01M4/62H01M10/0525
CPCH01M4/364H01M4/60H01M4/625H01M10/0525Y02E60/10
Inventor 沈彩靳岩
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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