Dense low-resistance super capacitor diaphragm material and preparation method thereof

A technology for supercapacitors and diaphragm materials, applied in the direction of hybrid capacitor separators, etc., can solve the problems of large diaphragm resistance, electrode short circuit, limiting supercapacitors, etc., and achieve the effect of good uniformity, large specific surface area, and abundant voids.

Inactive Publication Date: 2017-12-29
SUZHOU HAILINGDA EIECTRONIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In turn, the resistance of the diaphragm is large and the electrodes are easily short-circuited, which limits the electrical performance of the supercapacitor to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: A dense and low-resistance supercapacitor diaphragm material is composed of the following raw materials in parts by weight: 100 parts of matrix fiber, 18 parts of polyvinylidene fluoride fiber, 28 parts of acetone, 105 parts of dimethylacetamide, ceramic 15 parts of fiber, 15 parts of SAF superabsorbent fiber, 1.5 parts of zinc oxide, 3 parts of cationic starch, 10 parts of vinyl acetate emulsion; the matrix fiber is a mixture of polypropylene fiber and polyvinyl alcohol fiber.

[0021] A method for preparing a dense and low-resistance supercapacitor diaphragm material, comprising the following steps:

[0022] (1) Preparation of spinning film: Mix acetone and dimethylacetamide evenly at room temperature, then heat to 55°C and add polyvinylidene fluoride fibers, keep warm and stir until the solution is uniform and transparent. Silk liquid, under the conditions of spinning voltage 11kV, receiving distance 15cm, and liquid supply rate 1mL / h, electrospinning f...

Embodiment 2

[0028] Embodiment 2: A dense and low-resistance supercapacitor diaphragm material is composed of the following raw materials in parts by weight: 100 parts of matrix fiber, 15 parts of polyvinylidene fluoride fiber, 25 parts of acetone, 100 parts of dimethylacetamide, ceramic 10 parts of fiber, 10 parts of SAF superabsorbent fiber, 1 part of zinc oxide, 2 parts of cationic starch, 5 parts of vinyl acetate emulsion; the matrix fiber is polyethylene fiber.

[0029] A method for preparing a dense and low-resistance supercapacitor diaphragm material, comprising the following steps:

[0030] (1) Preparation of spinning film: Mix acetone and dimethylacetamide evenly at room temperature, then heat to 50°C and add polyvinylidene fluoride fibers, keep warm and stir until the solution is uniform and transparent. Silk liquid, under the conditions of spinning voltage 11kV, receiving distance 15cm, and liquid supply rate 1mL / h, electrospinning for 2h, and a spinning film with a thickness of...

Embodiment 3

[0036] Embodiment 3: A dense and low-resistance supercapacitor diaphragm material is composed of the following raw materials in parts by weight: 100 parts of matrix fiber, 20 parts of polyvinylidene fluoride fiber, 30 parts of acetone, 110 parts of dimethylacetamide, ceramic 20 parts of fiber, 20 parts of SAF superabsorbent fiber, 2 parts of zinc oxide, 4 parts of cationic starch, 15 parts of vinyl acetate emulsion; the matrix fiber is a mixture of polypropylene fiber, polyethylene fiber and polyvinyl alcohol fiber.

[0037] A method for preparing a dense and low-resistance supercapacitor diaphragm material, comprising the following steps:

[0038] (1) Preparation of spun film: Mix acetone and dimethylacetamide evenly at room temperature, then heat to 60°C and add polyvinylidene fluoride fibers, keep stirring until the solution is uniform and transparent, defoam and stand to get spun film Silk liquid, under the conditions of spinning voltage 11kV, receiving distance 15cm, and ...

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Abstract

The invention discloses a dense low-resistance super capacitor diaphragm material which comprises the following raw materials, by weight, 100 parts of matrix fibers, 15 to 20 parts of polyvinylidene fluoride fibers, 25 to 30 parts of acetone, 100 to 110 parts of dimethylacetamide, 10 to 20 parts of ceramic fiber, 10 to 20 parts of SAF superabsorbent fiber, 1 to 2 parts of zinc oxide, 2 to 4 parts of cationic starch and 5 to 15 parts of vinyl acetate emulsion. The invention also discloses a preparation method of the dense low-resistance super capacitor diaphragm material. In the invention, the polyvinylidene fluoride fiber is firstly subjected to spinning to obtain a spinning diaphragm with a thickness of 6-8 [mu]m, and then the matrix fiber is made into a non-woven fabric by a wet nonwoven fabric process, and the two are combined via a heat-pressing manner to be produced into the dense low-resistance super capacitor diaphragm material.

Description

technical field [0001] The invention relates to the field of preparation of electrochemical materials, in particular to a dense and low-resistance supercapacitor diaphragm material and a preparation method thereof. Background technique [0002] Supercapacitor is a highly competitive energy storage product that can realize fast charging and high current discharge, and has a charging life of more than 100,000 times. It plays an extremely important role in some applications that require short-term high-rate discharge. . [0003] The supercapacitor diaphragm material is located between two porous carbon electrodes, and is completely soaked in the electrolyte together with the electrodes. It plays an isolation role in the repeated charge and discharge process, prevents electron conduction, and prevents internal short circuit caused by contact between the two electrodes. . This requires that the separator material is an electronic insulator with good isolation performance, and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/52C08L23/12C08L29/04C08L27/16C08L31/04C08L67/00C08L23/06C08K7/04C08K3/22
CPCY02E60/13H01G11/52C08J5/18C08J2323/06C08J2323/12C08J2329/04C08J2367/00C08J2423/06C08J2423/12C08J2427/16C08J2429/04C08K2003/2296C08L23/06C08L23/12C08L29/04C08L67/00C08L2203/16C08L2203/20C08L2205/035C08L2205/16C08L27/16C08L31/04C08K7/04C08K3/22
Inventor 黄啸谷张其土
Owner SUZHOU HAILINGDA EIECTRONIC TECH CO LTD
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