Flexible electrode material with adjustable pore size and its preparation method and application

A flexible electrode and pore size technology, which is applied in the preparation/purification of carbon, electrode carrier/current collector, nanotechnology for materials and surface science, etc., can solve the problem that the pore size and size of flexible electrode materials cannot be effectively controlled, battery The overall performance is greatly affected, and the active material cannot be loaded, etc., to achieve the effect of excellent elastic performance, excellent electrochemical performance and low resistance value

Active Publication Date: 2020-07-10
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some flexible electrode materials are mostly obtained by preparing composite films from graphene, carbon nanotubes, manganese dioxide and other materials through suction filtration and film formation, but there are some problems in these flexible electrode materials: (1) flexible electrode materials in It is easy to break after being subjected to multiple bending deformations, which has a great impact on the overall performance of the battery; (2) The pore size and size inside the flexible electrode material cannot be effectively controlled, and other efficient active material materials cannot be loaded inside the material

Method used

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  • Flexible electrode material with adjustable pore size and its preparation method and application
  • Flexible electrode material with adjustable pore size and its preparation method and application
  • Flexible electrode material with adjustable pore size and its preparation method and application

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Embodiment 1

[0035] A flexible electrode material with adjustable pore size, the flexible electrode material is a double network carbon structure, the double network carbon structure includes a primary porous network carbon skeleton, and the pores of the primary porous network carbon skeleton are also filled with a secondary porous network carbon skeleton . Among them, the primary porous network carbon skeleton is formed by carbonization of melamine sponge, and the secondary porous network carbon skeleton is formed by carbonization of nanocellulose filled in the pores of melamine sponge. The pore size of the flexible electrode material in this embodiment is about 500-1000 nm.

[0036] The preparation method of the above-mentioned flexible electrode material with adjustable aperture comprises the following steps:

[0037] (1) Take the nanocellulose sol, prepare the nanocellulose solution with a mass fraction of 0.1% by ultrapure water, and then ultrasonically crush it in an ultrasonic pulv...

Embodiment 2

[0044] A flexible electrode material with adjustable pore size, the flexible electrode material is a double network carbon structure, the double network carbon structure includes a primary porous network carbon skeleton, and the pores of the primary porous network carbon skeleton are also filled with a secondary porous network carbon skeleton . Among them, the primary porous network carbon skeleton is formed by carbonization of melamine sponge, and the secondary porous network carbon skeleton is formed by carbonization of nanocellulose filled in the pores of melamine sponge. The pore size of the flexible electrode material in this embodiment is about 20-300 nm.

[0045] The preparation method of the above-mentioned flexible electrode material with adjustable aperture comprises the following steps:

[0046] (1) Take the nanocellulose sol, prepare the nanocellulose solution with a mass fraction of 0.5% by ultrapure water, and then ultrasonically crush it in an ultrasonic pulver...

Embodiment 3

[0052] A flexible electrode material with adjustable pore size, the flexible electrode material is a double network carbon structure, the double network carbon structure includes a primary porous network carbon skeleton, and the pores of the primary porous network carbon skeleton are also filled with a secondary porous network carbon skeleton . Among them, the primary porous network carbon skeleton is formed by carbonization of melamine sponge, and the secondary porous network carbon skeleton is formed by carbonization of nanocellulose filled in the pores of melamine sponge. The pore size of the flexible electrode material in this embodiment is about 20-200 nm.

[0053] The preparation method of the above-mentioned flexible electrode material with adjustable aperture comprises the following steps:

[0054] (1) Take the nanocellulose sol, prepare the nanocellulose solution with a mass fraction of 0.8% by ultrapure water, and then ultrasonically crush it in an ultrasonic pulver...

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Abstract

The invention discloses a flexible electrode material with an adjustable pore size. The flexible electrode material is of a dual network carbon structure. The dual network carbon structure includes aone-stage multihole network carbon skeleton, pores of the one-stage multihole network carbon skeleton is further filled with a second-stage multihole network carbon skeleton, and the pore size of theflexible electrode material is 10-1500 nm. The invention further provides a preparation method and application of the flexible electrode material with the adjustable pore size. The flexible electrodematerial is of the dual network structure, the adjustment of the pore size of the flexible electrode material can be realized easily, and the flexible electrode material with the adjustable pore sizeprovides a good basis for the subsequent further loading of other high active substances of the electrode material. In addition, the flexible collapsible capacity, the elastic property and the electrochemical property of the flexible electrode material are excellent.

Description

technical field [0001] The invention belongs to the field of polymer functional materials, and in particular relates to a flexible electrode material and its preparation method and application. Background technique [0002] In today's society, due to the increasing update speed of electronic products, flexible and bendable energy storage devices have become a hot spot in scientific research. Because of their light weight, bendable deformation, good stability and many other advantages, they have gradually begun to be used in foldable electronics. Equipment, aerospace, portable devices and other fields. The current collector of traditional batteries is generally made of high-strength materials such as copper foil and aluminum foil. When bent, it is easy to cause the active energy storage material coated on the material to fall off and separate, which affects the electrochemical stability of the battery. Therefore, it is not suitable for flexible battery. Flexible batteries r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/66C01B32/05C01B32/15B82Y30/00
CPCY02E60/10
Inventor 吴义强卿彦张振李蕾罗莎田翠花
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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