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Preparation method of nitrogen-doped three-dimensional interconnected hollow carbon foam electrode material

An interconnection and electrode material technology, which is applied in the field of preparation of nitrogen-doped three-dimensional interconnected hollow carbon bubble electrode materials, can solve the problems of complex reaction route, high cost, harsh equipment requirements, etc., and achieves simple preparation process and high repetition rate. High and low cost effect

Inactive Publication Date: 2019-07-09
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of these methods have shortcomings of varying degrees, such as: complex reaction routes, harsh equipment requirements, high energy consumption, high cost, etc., which greatly limit the wide application of the prepared carbon-doped materials
In addition, the hollow structure is easily destroyed during high temperature or complex reaction process

Method used

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  • Preparation method of nitrogen-doped three-dimensional interconnected hollow carbon foam electrode material
  • Preparation method of nitrogen-doped three-dimensional interconnected hollow carbon foam electrode material
  • Preparation method of nitrogen-doped three-dimensional interconnected hollow carbon foam electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] First, Zn powder and sucrose (Zn powder 21g, sucrose 7g) with a mass ratio of 3:1 were mixed by ball milling, the ball milling speed was 600 rpm, and the ball milling time was 10h. The resulting mixture was sealed in a 20 mL capacity stainless steel autoclave, placed in an electric furnace, heated to 550 °C at a rate of 5 °C / min, and kept for 10 h. After cooling down to room temperature naturally, the product in the autoclave was collected. The obtained product is chemically etched with 100mL, 10vol.% nitric acid at room temperature. After the reaction is complete, wash with distilled water until the pH of the filtrate is about 7, filter with suction, and finally put the sample in a vacuum drying oven for drying at 60°C 12h, the nitrogen-doped three-dimensional interconnected hollow carbon bubble electrode material was obtained.

[0021] The physical and chemical properties of the nitrogen-doped three-dimensional interconnected hollow carbon bubble electrode material o...

Embodiment 2

[0028] First, Zn powder and sucrose (Zn powder 21g, sucrose 7g) with a mass ratio of 3:1 were mixed by ball milling, the ball milling speed was 600 rpm, and the ball milling time was 10h. The resulting mixture was sealed in a 20 mL capacity stainless steel autoclave, placed in an electric furnace, heated to 550 °C at a rate of 5 °C / min, and kept for 10 h. After cooling down to room temperature naturally, the product in the autoclave was collected. The obtained product is chemically etched with 100mL, 50vol.% nitric acid at room temperature. After the reaction is complete, wash with distilled water until the pH of the filtrate is about 7, filter with suction, and finally put the sample in a vacuum drying oven for drying at 60°C 12h, the nitrogen-doped three-dimensional interconnected hollow carbon bubble electrode material was obtained.

[0029] According to the experimental test results, the nitrogen-doped three-dimensional interconnected hollow carbon bubbles are formed by i...

Embodiment 3

[0031] First, Zn powder and sucrose (Zn powder 21g, sucrose 7g) with a mass ratio of 3:1 were mixed by ball milling, the ball milling speed was 600 rpm, and the ball milling time was 10h. The resulting mixture was sealed in a 20 mL capacity stainless steel autoclave, placed in an electric furnace, heated to 550 °C at a rate of 5 °C / min, and kept for 10 h. After cooling down to room temperature naturally, the product in the autoclave was collected. The obtained product is chemically etched with 100mL, 100vol.% nitric acid at room temperature. After the reaction is complete, wash with distilled water until the pH of the filtrate is about 7, filter with suction, and finally put the sample in a vacuum drying oven for drying at 60°C 12h, the nitrogen-doped three-dimensional interconnected hollow carbon bubble electrode material was obtained.

[0032]According to the experimental test results, the nitrogen-doped three-dimensional interconnected hollow carbon bubbles are formed by i...

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Abstract

The invention discloses a preparation method of a nitrogen-doped three-dimensional interconnected hollow carbon foam electrode material, which specifically includes the following steps: (1) mixing Znpowder and sucrose by ball milling at a mass ratio of 3:1, sealing the mixture in a high-pressure reactor, raising the temperature to 550 DEG C at a rate of 5 DEG C / min and keeping the temperature for10h, and naturally cooling the reactor to room temperature; and (2) chemically etching an obtained precursor with nitric acid aqueous solution, and after complete reaction, washing the precursor withdistilled water to neutral, and carrying out pumping filtration and drying to obtain a nitrogen-doped three-dimensional interconnected hollow carbon foam electrode material. The preparation process is simple and controllable, has low cost and high repetition rate, and is especially suitable for industrial production. The prepared nitrogen-doped three-dimensional interconnected hollow carbon foamelectrode material has excellent cycle performance and rate performance as a negative electrode material for lithium-ion batteries, and has good application prospects in the battery field.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrode materials, and in particular relates to a preparation method of a nitrogen-doped three-dimensional interconnected hollow carbon bubble electrode material. Background technique [0002] Carbon nanomaterials can be used as ideal anode materials for both lithium-ion batteries and sodium-ion batteries and have attracted much attention. The electrochemical performance of carbon nanomaterials is mainly affected by the microstructure and composition, so rationally designing the microstructure of carbon materials is one of the effective ways to improve battery performance. Currently, carbon materials with various microstructures have been developed, such as carbon nanotubes, carbon nanofibers, porous carbons, hollow carbons, etc. Among them, the interconnected three-dimensional hollow carbon bubbles can not only effectively alleviate the volume change during the charging and discharging ...

Claims

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Application Information

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IPC IPC(8): H01M4/587H01M4/36H01M10/0525H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/362H01M4/587H01M10/0525H01M10/054Y02E60/10
Inventor 张晶晶夏志刚曹江行李壮范美强王天根陈玥希
Owner CHINA JILIANG UNIV