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Preparation method of electrode material and electrode material prepared therefrom

An electrode material and aerogel technology, applied in the field of electrode material preparation, can solve the problems of uncontrollable microscopic morphology, embedding, and agglomeration of nano active particles, and achieve the effect of controllable surface morphology and uniform distribution

Inactive Publication Date: 2017-10-10
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There have been a lot of research reports on the electrode materials formed by the composite of cellulose and PANI, CNTs or GO, but at present, their composite methods are physical mixing, deposition or in-situ polymerization, which easily cause the aggregation or embedding of nano active particles, making The microscopic morphology cannot be controlled, which limits the development of its electrochemical characteristics

Method used

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  • Preparation method of electrode material and electrode material prepared therefrom
  • Preparation method of electrode material and electrode material prepared therefrom
  • Preparation method of electrode material and electrode material prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Disperse 1.14g of plantation eucalyptus WFs, 0.22g of CNCs, 0.42g of butane tetracarboxylic acid and 0.22g of sodium hypophosphite in 98g of deionized water, and obtain a suspension after ultrasonic treatment for 10min, pour the suspension into a copper tube, Freeze with liquid nitrogen for 1 min, and then freeze-dry for 3 days to obtain WFs / CNCs airgel;

[0031] 2) The airgel obtained in step 1) was subjected to a cross-linking reaction at 160° C. for 5 minutes;

[0032] 3) Add 0.1 mg / mL PANI dispersion with pH=2.6 to the airgel obtained in step 2), keep it for 5 min, then vacuum filter, wash with deionized water, and dry, then add 0.1 mg / mL carboxylated mono The wall CNTs dispersion liquid was added to the above airgel, kept for 5 min, and vacuum filtered again, washed with deionized water, and dried, so that positively charged PANI and negatively charged carboxylated single-wall CNTs were alternately deposited on the WFs / CNCs airgel. On the gel skeleton, repeat t...

Embodiment 2

[0035]1) Disperse 1.66g of plantation eucalyptus WFs, 0.11g of CNCs, 0.15g of butane tetracarboxylic acid and 0.08g of sodium hypophosphite in 98g of deionized water, and obtain a suspension after ultrasonic treatment for 15min, pour the suspension into a copper tube, Freeze with liquid nitrogen for 1 min, and then freeze-dry for 1 day to obtain WFs / CNCs airgel;

[0036] 2) The airgel obtained in step 1) was subjected to a crosslinking reaction at 170° C. for 2 minutes;

[0037] 3) Add 0.3 mg / mL PANI dispersion with pH=2.8 to the airgel obtained in step 2), keep it for 1 min, then vacuum filter, wash with deionized water, and dry, then add 0.5 mg / mL carboxylated bis The wall CNTs dispersion was added to the above airgel, kept for 1 min, vacuum filtered again, washed with deionized water, and dried, so that positively charged PANI and negatively charged carboxylated double-walled CNTs were alternately deposited on the WFs / CNCs air On the gel skeleton, the final WFs / CNCs / [PANI-...

Embodiment 3

[0040] 1) Disperse 0.68g of plantation eucalyptus WFs, 0.14g of CNCs, 0.44g of butane tetracarboxylic acid and 0.22g of sodium hypophosphite in 98.52g of deionized water, and obtain a suspension after ultrasonic treatment for 20min, and pour the suspension into a copper tube , frozen with liquid nitrogen for 5 minutes, and then freeze-dried for 2 days to obtain WFs / CNCs airgel;

[0041] 2) The airgel obtained in step 1) was subjected to a cross-linking reaction at 170° C. for 5 minutes;

[0042] 3) Add 0.1mg / mL PANI dispersion with pH=2.6 to the airgel obtained in step 2), keep it for 5min, then vacuum filter, wash with deionized water, and dry, then add 1mg / mL carboxylated multiwall The CNTs dispersion was added to the above airgel, kept for 5min, vacuum filtered again, washed with deionized water, and dried, so that positively charged PANI and negatively charged carboxylated multi-walled CNTs were alternately deposited on the WFs / CNCs airgel On the glue skeleton, repeat the...

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Abstract

The invention relates to a preparation method of an airgel electrode material, comprising the following steps: 1) dispersing wood fibers, nanocellulose crystals and crosslinking aids in water to obtain a suspension, pouring the suspension into a container, and freezing treatment, and then through freeze-drying to obtain wood fiber / nanocellulose crystal airgel; 2) carry out cross-linking reaction at 150-250°C for wood fiber / nanocellulose crystal airgel; 3) disperse polyaniline Add liquid to the airgel obtained in step 2), then vacuum filter, wash, and dry, then add the carboxylated carbon nanotube and / or graphene oxide dispersion to the above airgel, vacuum filter again, wash, Drying, thereby alternately depositing positively charged polyaniline and negatively charged carboxylated carbon nanotubes and / or graphene oxide on the wood fiber / nanocellulose crystalline airgel skeleton to obtain the airgel electrode material . The invention also relates to electrode materials prepared by this method.

Description

technical field [0001] The invention relates to a preparation method of a material, in particular to a preparation method of an electrode material. The invention also relates to electrode materials prepared by this method. Background technique [0002] Airgel materials have properties such as low density, porosity, high specific surface area, and low heat transfer, and have potential applications in adsorption, photoelectric materials, sensors, drug release, and energy storage. Among them, cellulose-based airgel has become a research hotspot of airgel materials due to its natural regeneration, biocompatibility, and hydrophilicity. As an excellent framework, cellulose-based airgel allows micro-nano-scale materials to diffuse or fill in it, so it can be combined with carbon nanotubes, graphene (graphene oxide), conductive polymers, etc. to form new nano-functional materials with excellent performance. [0003] Polyaniline (PANI) is a conductive polymer material with a large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86
Inventor 吕少一常焕君傅峰黄景达陈志林
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY