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Preparation method of carbon nano material, positive electrode material and preparation method thereof

A technology of carbon nanomaterials and positive electrode materials, which is applied in the field of nanomaterials, can solve the problems of in-situ doping of catalytic metals/heteroatoms, difficulty in adjusting the structure, and low specific surface area, etc., and achieve controllable carbon structure and environment. The effect of small influence and large specific surface area

Inactive Publication Date: 2020-05-05
SHENZHEN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing carbon nanomaterials, positive electrode materials and methods for preparing the same, aiming to solve the problem that the Co / N co-doped carbon materials prepared by existing methods have low specific surface area, difficult structure adjustment, and cannot be quickly realized. Technical Issues in Catalytic Metal / Heteroatom In Situ Doping

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  • Preparation method of carbon nano material, positive electrode material and preparation method thereof
  • Preparation method of carbon nano material, positive electrode material and preparation method thereof
  • Preparation method of carbon nano material, positive electrode material and preparation method thereof

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[0028] On the one hand, an embodiment of the present invention provides a method for preparing a carbon nanomaterial, comprising the following steps:

[0029] S01: providing a cobalt-doped zinc-based metal-organic framework, wherein the organic framework in the cobalt-doped zinc-based metal-organic framework contains nitrogen;

[0030] S02: subjecting the cobalt-doped zinc-based metal-organic framework to carbonization treatment and acid treatment in sequence, and then drying to obtain a Co / N co-doped carbon nanomaterial.

[0031] The method for preparing carbon nanomaterials provided in the embodiments of the present invention uses cobalt-doped zinc-based metal-organic frameworks as precursor materials, and the cobalt-doped zinc-based metal-organic frameworks are sequentially carbonized and acid-treated to obtain Co / N double-doped carbon nanomaterial with super carbon structure, the carbon nanomaterial obtained by this preparation method has a controllable carbon structure, ...

Embodiment 1

[0057] (1) Preparation of carbon nanomaterials

[0058] Weigh benzimidazole (0.29539g), 2-methylbenzimidazole (0.26432g) and cobalt chloride (0.03399) and place in a beaker, add 40ml of DMF solution, place the beaker on a magnetic stirrer, and stir for 20min , form solution A, weigh zinc acetate (0.49394) and place it in a beaker, add 30ml of DMF solution, place the beaker on a magnetic stirrer, stir for 20min, form solution B, slowly add solution B in solution A, at room temperature Stir vigorously under low temperature for 24h, filter and wash with ethanol three times, and dry at 70°C overnight to obtain a cobalt-doped Zn-MOF, namely CMJ-0.03.

[0059] Put CMJ-0.03 into a tube furnace and heat it at a temperature of 900°C. The heating rate is 5°C / min, and the constant temperature time is 5h. %), sonicated for 30 min, washed with ethanol and deionized water, and dried in an oven at 70°C to obtain Co / N co-doped carbon material CMC-0.03.

[0060] (2) Preparation of cathode ma...

Embodiment 2

[0063] (1) Preparation of carbon nanomaterials

[0064] Weigh benzimidazole (0.29539), 2-methylbenzimidazole (0.26432g) and cobalt chloride (0.05558g) and place in a beaker, add 40ml of DMF solution, place the beaker on a magnetic stirrer, and stir for 20min , to form solution A, take zinc acetate (0.49407g) and place it in a beaker, add 30ml of DMF solution, and place the beaker on a magnetic stirrer, stir for 20min to form solution B, slowly add solution B in solution A, Stir vigorously at room temperature for 24 h; filter, wash with ethanol three times, and dry at 70°C overnight to obtain a cobalt-doped Zn-MOF, namely CMJ-0.05.

[0065] Put CMJ-0.05 into a tube furnace and heat it at a temperature of 900°C. The heating rate is 5°C / min, and the constant temperature time is 5h. %), sonicated for 30 min, washed with ethanol and deionized water, and dried in an oven at 70°C to obtain Co / N co-doped carbon material CMC-0.05.

[0066] (2) Preparation of cathode material

[0067...

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Abstract

The invention belongs to the technical field of nano materials, and particularly relates to a preparation method of a carbon nano material, a positive electrode material and a preparation method of the positive electrode material. The preparation method of the carbon nano material comprises the steps of providing a cobalt-doped zinc-based metal organic framework, wherein the organic framework in the cobalt-doped zinc-based metal organic framework contains a nitrogen element; and sequentially carrying out carbonization treatment and acid treatment on the cobalt-doped zinc-based metal organic framework, and then drying to obtain the Co / N co-doped carbon nano material. According to the preparation method, the carbon nano material with a Co / N double-doped super carbon structure is obtained; the carbon nano material has a controllable carbon structure and a relatively large specific surface area; and Co / N double doping is achieved. When the electrode material is used as the positive electrode material of a Li-SeS2 battery, the electrode material can effectively improve the utilization rate of the active substance SeS2 and prevent the diffusion of a polysulfide / polyselenium compound inthe electrolyte. Furthermore, the electrode material has has great application prospects in the fields of energy storage, electro-catalysis, gas adsorption and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a preparation method of carbon nanomaterials, a positive electrode material and a preparation method thereof. Background technique [0002] The specific capacity, cycle stability and cycle life of mobile energy storage devices are considered to be the key parameters to measure the superiority of the energy storage system. An effective way, which is mainly based on the high theoretical specific capacity of Li-S battery (1675mA h -1 g -1 ), which is almost three to five times that of commercial lithium batteries. At the same time, as the positive electrode material, S element is rich in resources and low in cost, so Li-S battery was once considered to be an ideal candidate to replace lithium battery. Unfortunately, S has strong insulation, which leads to the high rate of Li-S battery system The performance is generally poor, and the utilization rate of the acti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/62H01M10/052
CPCH01M4/362H01M4/625H01M10/052Y02E60/10
Inventor 曾燮榕金文武邹继兆S·因古瓦曾绍忠徐国忠
Owner SHENZHEN UNIV
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