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Preparation method of carbon nanotube through-type growth MOF composite electrode material

A technology of carbon nanotubes and composite electrodes, which is applied in the direction of carbon nanotubes, nanocarbons, battery electrodes, etc., can solve problems such as the inability to effectively alleviate the collapse of the structure of MOF derivatives, and achieve improved rate performance and cycle performance, high active sites point, the effect of improving conductivity

Inactive Publication Date: 2020-05-01
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that most composite materials are limited to attaching MOF derivatives to the surface of carbon-based materials, which cannot effectively alleviate the structural collapse of MOF derivatives during charging and discharging.

Method used

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  • Preparation method of carbon nanotube through-type growth MOF composite electrode material
  • Preparation method of carbon nanotube through-type growth MOF composite electrode material
  • Preparation method of carbon nanotube through-type growth MOF composite electrode material

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Embodiment 1

[0027] A method for preparing a carbon nanotube penetrating growth MOF composite electrode material, comprising the following steps:

[0028] (1) Sonicate 40 mg of carbon nanotubes in an aqueous solution until uniformly dispersed.

[0029] (2) Dissolve 1.2mmol sodium acetate tetrahydrate and 1.8mmol sodium citrate in 20ml of water to form solution A; dissolve 0.8mmol potassium cobaltcyanide in 20ml of water to form solution B; quickly dissolve A and pour it into solution B Form and stir for 1 min to form a precursor solution of Co-Co-PBA.

[0030] (3) Uniformly mix the carbon nanotube solution in step (1) with the Co-Co-PBA precursor solution in step (2), and then put it into ultrasonication for 1-12 hours.

[0031] (4) After ultrasonication, the mixed solution was centrifugally cleaned, and then vacuum-dried at 60°C.

[0032] (5) Heat-treat the Co-Co-PBA with carbon nanotubes through-grown in different atmospheres according to requirements: generate Co3O4@CNT composites at ...

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Abstract

The invention belongs to the technical field of electrode material preparation, and particularly relates to a preparation method of a carbon nanotube through-type growth MOF composite electrode material. The preparation method comprises the following steps of: uniformly mixing a carbon nanotube solution with a precursor solution of MOF, and then carrying out ultrasonic treatment. According to thepreparation method, MOF grows on the carbon nanotube in a through manner through a simple ultrasonic method, equivalently, a pinning effect is achieved, and the structural stability of the MOF derivative is improved. Therefore, the through of the carbon nanotubes can effectively alleviate the structural collapse effect of the MOF derivative in the charging and discharging process, and significantly improve the cycle performance of the MOF derivative.

Description

Technical field: [0001] The invention belongs to the technical field of electrode material preparation, and in particular relates to a method for preparing a carbon nanotube through-grown MOF composite electrode material. Background technique: [0002] In recent years, metal-organic frameworks (MOFs) have been widely studied and applied as electrode materials for energy storage devices due to their advantages such as large specific surface area, adjustable structure, and many pores. Researchers usually use MOF as a self-sacrificing template to prepare various MOF-derived materials, which not only retains its porous structure, but also effectively improves its conductivity. When used as an electrode material, it can significantly increase the energy density and power density of the battery. [0003] There are usually two forms of MOF derivative materials, one is to obtain MX (M=Fe, Co, Mn, Ni, etc.; X=O, S, Se, P, etc.); the other is to obtain MX@Carbon composite materials. ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/60H01M4/62H01M10/0525H01M10/054C01B32/158
CPCH01M4/362H01M4/60H01M4/625H01M10/0525H01M10/054C01B32/158Y02E60/10
Inventor 刘治明何燕王晓君魏晴李慧芳高江姗徐瑾张立胜
Owner QINGDAO UNIV OF SCI & TECH
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