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Nitrogen-doped hollow amorphous carbon shell material, preparation method and application

A nitrogen-doped, amorphous carbon technology, applied in the preparation/purification of carbon, structural parts, electrical components, etc., can solve the problems of dendrites piercing the diaphragm and increasing the polarization of battery voltage

Active Publication Date: 2021-09-10
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention proposes a nitrogen-doped hollow amorphous carbon shell material, preparation method and application, which solves the problem of dendrite piercing through the diaphragm caused by uneven deposition of sodium ions and dead sodium will increase the voltage polarization and total resistance of the battery The problem

Method used

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  • Nitrogen-doped hollow amorphous carbon shell material, preparation method and application
  • Nitrogen-doped hollow amorphous carbon shell material, preparation method and application
  • Nitrogen-doped hollow amorphous carbon shell material, preparation method and application

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Effect test

Embodiment 1

[0031] Preparation of a nitrogen-doped hollow amorphous carbon shell sodium metal battery anode material:

[0032] (1) Zinc oxide nanorods

[0033] ZnO nanorods were synthesized by a water bath method.

[0034] The preparation steps are as follows: Zinc acetate dihydrate (C 4 h 6 o 4 ·Zn·2H 2 O, 1.1 g), hexamethylenetetramine (C 6 h 12 N 4 , 0.7 g) was dissolved in 200 ml of deionized water, heated in a water bath at 90 °C for 5 hours, and centrifuged to dry to obtain white zinc oxide powder.

[0035] (2) Preparation of nitrogen-doped hollow amorphous carbon shells

[0036] Dissolve 240 mg of dopamine hydrochloride in 74 ml of alcohol and 34 ml of deionized water, dissolve 180 mg of Tris in 8 ml of alcohol and 4 ml of deionized water, and then slowly add the Tris buffer into the dopamine hydrochloride solution dropwise.

[0037] Pour the zinc oxide powder in (1) into the above solution, and stir for 12 hours in the dark. Afterwards, it was centrifuged and dried, and ...

Embodiment 2

[0044] Preparation of a nitrogen-doped hollow amorphous carbon shell sodium metal battery anode material:

[0045] (1) Zinc oxide nanorods

[0046] ZnO nanorods were synthesized by a water bath method.

[0047] The preparation steps are as follows: Zinc acetate dihydrate (C 4 h 6 o 4 ·Zn·2H 2 O, 1.1 g), hexamethylenetetramine (C 6 h 12 N 4 , 0.7 g) was dissolved in 200 mL of deionized water, heated in a water bath at 90 °C for 5 hours, and centrifuged to dry to obtain white zinc oxide powder.

[0048] (2) Preparation of nitrogen-doped hollow amorphous carbon shells

[0049] Dissolve 230 mg of dopamine hydrochloride in 74 ml of alcohol and 34 ml of deionized water, dissolve 170 mg of Tris in 8 ml of alcohol and 4 ml of deionized water, and then slowly add the Tris buffer into the dopamine hydrochloride solution dropwise. Pour the zinc oxide powder in (1) into the above solution, and stir for 12 hours in the dark. Afterwards, it was centrifuged and dried, and annealed ...

Embodiment 3

[0052] Preparation of a nitrogen-doped hollow amorphous carbon shell sodium metal battery anode material:

[0053] (1) Zinc oxide nanorods

[0054] ZnO nanorods were synthesized by a water bath method.

[0055] The preparation steps are as follows: Zinc acetate dihydrate (C 4 h 6 o 4 ·Zn·2H 2 O, 1.1 g), hexamethylenetetramine (C 6 h 12 N 4 , 0.7 g) was dissolved in 200 mL of deionized water, heated in a water bath at 90 °C for 5 hours, and centrifuged to dry to obtain white zinc oxide powder.

[0056] (2) Preparation of nitrogen-doped hollow amorphous carbon shells

[0057] Dissolve 230 mg of dopamine hydrochloride in 74 ml of alcohol and 34 ml of deionized water, dissolve 160 mg of Tris in 8 ml of alcohol and 4 ml of deionized water, and then slowly add the Tris buffer into the dopamine hydrochloride solution dropwise. Pour the zinc oxide powder in (1) into the above solution, and stir for 12 hours in the dark. Afterwards, it was centrifuged and dried, and annealed ...

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Abstract

The invention provides a nitrogen-doped hollow amorphous carbon shell material, a preparation method and application. The preparation method comprises the following steps of: slowly dripping a Tris buffer agent into a dopamine hydrochloride solution; adding a zinc oxide nanorod, performing stirring and centrifugal drying; performing annealing in an argon atmosphere to obtain a nitrogen-doped amorphous carbon shell coated zinc oxide material; performing etching with hydrochloric acid to obtain the nitrogen-doped hollow carbon shell material. The nitrogen-doped hollow amorphous carbon shell negative electrode material is of a rod-shaped hollow structure, the nucleation overpotential can be effectively reduced through the unique hollow structure and the sodium affinity of nitrogen, and the cycle performance is improved.

Description

technical field [0001] The invention relates to the field of new energy electrochemistry, in particular to a nitrogen-doped hollow amorphous carbon shell material, a preparation method and an application. Background technique [0002] With the limitation of conventional energy sources and the increasingly serious environmental problems, secondary batteries in line with green and sustainable development have received extensive attention. Compared with lithium-ion batteries, sodium-ion batteries have acceptable energy density, and sodium resources are more abundant, more than 1000 times that of lithium, and the cost of sodium is lower. Therefore, people turn their attention from lithium-ion batteries to sodium-ion batteries. In Na-ion batteries, Na metal has a high theoretical capacity of 1166 mAh g -1 And low electrochemical potential -2.714 V vs. standard hydrogen electrode, which is a research hotspot in the anode material of sodium ion battery. However, Na metal has hig...

Claims

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Application Information

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IPC IPC(8): H01M4/583H01M4/62H01M10/054C01B32/05
CPCH01M4/583H01M4/625H01M10/054C01B32/05Y02E60/10
Inventor 王烨王兵艳许婷婷孔德志李新建
Owner ZHENGZHOU UNIV
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