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Liquid metal conductive composition for screen printing, and preparation method and application thereof

A conductive composition and liquid metal technology, applied in applications, printed circuits, metal pattern materials, etc., can solve the problems of reducing the conductivity of devices, complicated integration steps, and poor energy storage performance

Active Publication Date: 2020-10-23
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, a large number of composite materials are cleverly designed for high-performance energy storage devices to improve their mechanical flexibility, but the addition of composite materials will reduce the overall conductivity of the device, thereby affecting its electrochemical performance.
Planar micro-energy storage devices (planar micro-batteries and planar micro-supercapacitors), as a class of flexible and wearable products, also have the same problems, such as poor energy storage performance, time-consuming preparation process, complex integration steps, and difficulty in achieving macro-scale production etc.

Method used

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  • Liquid metal conductive composition for screen printing, and preparation method and application thereof
  • Liquid metal conductive composition for screen printing, and preparation method and application thereof
  • Liquid metal conductive composition for screen printing, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The preparation method of the liquid metal conductive composition for screen printing, the specific process is as follows:

[0048] (1) Preparation of silk fibroin: silkworm cocoons are degummed, dissolved, dialyzed, and freeze-dried to obtain pure silk fibroin, specifically:

[0049] a, silkworm cocoon degumming: use Na 2 CO 3 The solution was boiled at 100°C for 40 minutes with a bath ratio of 1:40, and repeated 4 times to obtain degummed silk fibroin;

[0050] b. Silk fibroin dissolution: prepare CaCl 2 :H 2 O: C 2 h 5 Mixed solvent with OH molar ratio of 1:2:8, put silk fibroin in a bath ratio of 1:10, put it in a water bath at 75±2°C and stir it at constant temperature until it is completely dissolved to obtain brown-yellow silk fibroin-calcium chloride solution;

[0051] c. Dialysis: import the silk fibroin-calcium chloride solution obtained in step b into a clean dialysis bag, dialyze with water for 3-7 days, remove solid impurities by centrifugal filtrati...

Embodiment 2

[0061] The preparation method of the liquid metal conductive composition for screen printing, the specific process is as follows:

[0062] (1) preparation of silk fibroin: with embodiment 1;

[0063] (2) Preparation of silk fibroin aqueous solution: mix silk fibroin (0.8 g) obtained in step (1) with deionized water (22 mL), and magnetically stir at 60° C. for 6 hours to obtain silk fibroin aqueous solution;

[0064] (3) Preparation of conductive ink: add 2.15 g of gallium-indium alloy to the silk fibroin aqueous solution obtained in step (2), in an ice bath environment, ultrasonic 30min, to obtain conductive ink;

[0065] (4) Paste preparation: Add 0.25 g of polyvinylpyrrolidone to the conductive ink obtained in step (3), and stir for 25 minutes to obtain a liquid metal conductive paste for screen printing.

Embodiment 3

[0067] The preparation method of the liquid metal conductive composition for screen printing, the specific process is as follows:

[0068] (1) preparation of silk fibroin: with embodiment 1;

[0069] (2) Preparation of silk fibroin aqueous solution: mix the silk fibroin (1 g) obtained in step (1) with deionized water (28 mL), and stir magnetically at 55° C. for 5.5 hours to obtain an aqueous silk fibroin solution;

[0070] (3) Preparation of conductive ink: add 2.15g of gallium-indium alloy to the silk fibroin aqueous solution obtained in step (2), in an ice bath environment, ultrasonic 25min, to obtain conductive ink;

[0071] (4) Paste preparation: Add 0.38 g of carboxymethyl cellulose (CMC) to the conductive ink obtained in step (3), and stir for 60 minutes to obtain a liquid metal conductive paste for screen printing.

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Abstract

The invention relates to a conductive composition, especially relates to a liquid metal conductive composition for screen printing, and a preparation method and application thereof, and belongs to thetechnical field of energy storage system device materials. Silkworm cocoons are subjected to degumming and other treatment to obtain silk fibroin, the silk fibroin is dissolved in water to form an aqueous silk fibroin solution, liquid metal is added, ultrasonic dispersion is carried out, and the viscosity of the aqueous silk fibroin solution is adjusted through a high-viscosity polymer to obtainthe liquid metal conductive composition for silk-screen printing. The conductive composition is simple, green and environment-friendly, and has excellent conductivity and dispersion stability; the rheological property is good, the volatility is good, and the permeability is moderate; and the printed floral patterns are clear and high in resolution. The liquid metal conductive composition can be used for preparing a conductive substrate and positive and negative electrode materials of a planar flexible energy storage device, and endows the energy storage device with good mechanical properties and electrochemical properties.

Description

technical field [0001] The invention relates to a conductive composition, in particular to a liquid metal conductive composition for screen printing, a preparation method and application thereof, and belongs to the technical field of energy storage system device materials. Background technique [0002] With the rapid development of the field of energy storage, the continuous progress of electronic equipment has greatly promoted the rapid development of miniaturized and miniaturized energy storage devices. Traditional energy storage devices are large in size and heavy in weight, and their application fields are greatly limited, which can no longer meet the current basic needs. In the future, these electronic products will definitely develop in the direction of miniaturization, flexibility, multi-function, and integration. Portable, flexible, and wearable electronic products have greater mechanical flexibility, can adapt to different environments to a certain extent, and meet ...

Claims

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Application Information

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IPC IPC(8): C09D11/52C09D11/04C09D11/03C09D11/102C09D11/106C09D11/14C09D11/107H01B1/22H01B13/00H05K1/09
CPCC09D11/52C09D11/04C09D11/03C09D11/102C09D11/106C09D11/14C09D11/107H01B1/22H01B13/00H05K1/092Y02E60/13
Inventor 胡毅张亚茹程钟灵倪长克张国琴王子希
Owner ZHEJIANG SCI-TECH UNIV
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