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Carbon nanotube-dispersed polyionic liquid organic solid electrolyte and preparation method thereof

A technology of polyionic liquid and solid electrolyte, which is applied in the field of preparation of polyionic liquid organic solid electrolyte, can solve problems such as limiting the wide application of carbon nanotubes, and achieve the effects of easy molding, high thermal stability and simple process.

Active Publication Date: 2019-08-20
华碳研发(深圳)有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, due to the strong van der Waals interaction between the tubes, carbon nanotubes are easy to attrac

Method used

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  • Carbon nanotube-dispersed polyionic liquid organic solid electrolyte and preparation method thereof
  • Carbon nanotube-dispersed polyionic liquid organic solid electrolyte and preparation method thereof
  • Carbon nanotube-dispersed polyionic liquid organic solid electrolyte and preparation method thereof

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preparation example Construction

[0040] The invention also discloses a preparation method of polyionic liquid organic solid state electrolyte containing carbon nanotube dispersion: it comprises the following steps:

[0041] Step 1) Add oligomeric ethylene oxide monomer component A and component B in the stirred tank, and add the molar ratio: A: B=1:1;

[0042] Step 2) Add N-methylbis(trifluoromethylsulfonyl)imide to the monomer mixture in step 1), and the molar ratio is: A:B:N-methylbis(trifluoromethylsulfonyl) Acyl)imide = 1:1:2; heat up to 100-120°C, heat and mix thoroughly under nitrogen atmosphere for 24 hours, nitrogen concentration > 99.9%, pressure 0.7MPa, to obtain a viscous translucent main chain Type ionic liquid polymer (PIL);

[0043]Step 3) Add carbon nanotube powder (CNT) to the polyionic liquid obtained in the above step 2), the mass ratio of adding is: PIL:CNT=100:0.5-2, keep the temperature at 100-120°C, continue to heat at a constant temperature to fully After stirring and mixing for 2 hou...

Embodiment 1

[0054] By polymerizing monomer component A, its structural formula is

[0055]

[0056] Monomer component B, its structural formula is

[0057]

[0058] After mixing, add N-methylbis(trifluoromethylsulfonyl)imide, adding molar ratio: A:B:N-methylbis(trifluoromethylsulfonyl)imide=1:1 : 2. Heat up to 100°C, heat and mix thoroughly under nitrogen atmosphere for 24 hours, then add 0.5wt% of single-walled carbon nanotube powder with average diameter and length of 2.5nm and 5.4μm, respectively, and continue to keep stirring and mixing at 110°C for 2 hours to obtain SWCNT / PIL composite solid electrolyte.

[0059] The prepared SWCNT / PIL composite solid electrolyte has a glass transition temperature (Tg) of -35°C, a thermal decomposition temperature (Tc) of 255°C, and a room temperature conductivity of 1.2×10 -3 S / cm.

Embodiment 2

[0061] By polymerizing monomer component A, its structural formula is

[0062]

[0063] Monomer component B, its structural formula is

[0064]

[0065] After mixing, add N-methylbis(trifluoromethylsulfonyl)imide, adding molar ratio: A:B:N-methylbis(trifluoromethylsulfonyl)imide=1:1 : 2. Raise the temperature to 120°C, heat and mix thoroughly under nitrogen atmosphere for 24 hours, then add 0.5wt% single-walled carbon nanotube powder with an average diameter and length of 2.5nm and 5.4μm, respectively, and continue to keep stirring and mixing at 110°C for 2 hours to obtain SWCNT / PIL composite solid electrolyte.

[0066] The glass transition temperature (Tg) of the prepared SWCNT / PIL composite solid electrolyte is -36°C, the thermal decomposition temperature (Tc) is 248°C, and the room temperature conductivity is 1.4×10 -3 S / cm.

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Abstract

A preparation method of a carbon nanotube-dispersed polyionic liquid organic solid electrolyte comprises the following steps: an ethylene oxide oligomer monomer component A, a component B and N-methylbis(trifluoromethylsulfonyl)imide are added, and are mixed according to a molar ratio of 1:1:2; the obtained mixture is heated to 110 DEG C, and the heated mixture is stirred and mixed under the protection of nitrogen to obtain a main chain type ionic liquid polymer (PIL); and a carbon nanotube powder (CNT) is added, the obtained mixture is heated and stirred, and the heated mixture is cooled to obtain the CNT/PIL composite solid electrolyte. The present invention also provides a structural formula of the composite solid electrolyte.

Description

technical field [0001] The invention relates to the field of pure organic solid polymer electrolyte materials, in particular to a method for preparing a polyionic liquid organic solid electrolyte containing carbon nanotubes dispersed. Background technique [0002] Solid polymer electrolytes, also known as ion-conducting polymers, have a wide range of applications in flexible electronics, energy batteries, wearable devices, and medical sensors due to their good electrical conductivity, high processability, and high stability. And it is regarded as the safest ideal electrolyte material for lithium-ion batteries. [0003] The earliest reported solid polymer electrolyte is a complex composed of polyethylene oxide (PEO) and alkali metal ions, in which the conductivity of alkali metal ions at 40-50 °C can reach ~10 -5 S / cm. However, due to the high crystallinity of PEO, the conductivity at room temperature is only ~10 -8 S / cm. In recent years, the research and development of p...

Claims

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Application Information

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IPC IPC(8): C08G73/06C08K3/04C08K5/43
CPCC08G73/0605C08K5/43C08K2201/003C08K2201/004C08K2201/011C08K3/041
Inventor 陈振赵琦杨劲光
Owner 华碳研发(深圳)有限公司
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