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Preparation method of sodium ion battery negative electrode material, negative electrode material and sodium ion battery

A technology of sodium ion battery and negative electrode material, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve problems such as potential safety hazards, poor rate performance, etc., to reduce the impact of battery performance, improve rate performance, and improve safety. performance effect

Pending Publication Date: 2021-11-16
DONGGUAN CHUANGMING BATTERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the low degree of graphitization of hard carbon materials leads to poor rate performance. At the same time, if hard carbon materials want to ensure high reversible capacity, part of the capacity comes from low voltage (about 0V), and this part of the voltage is close to sodium precipitation. voltage, which could cause serious safety hazards during fast charging

Method used

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  • Preparation method of sodium ion battery negative electrode material, negative electrode material and sodium ion battery
  • Preparation method of sodium ion battery negative electrode material, negative electrode material and sodium ion battery

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preparation example Construction

[0015] The preparation method of sodium ion battery negative electrode material of the present invention comprises:

[0016] (1) Hydrothermal reaction

[0017] Stir phenylenediamine, tannic acid and graphene oxide in water evenly, then transfer to a reaction kettle for hydrothermal reaction to obtain a compound;

[0018] (2) Carbonization reaction

[0019] The composite is carbonized in a carbonization furnace at 400-700°C.

[0020] Wherein, in step (1), the mass ratio of phenylenediamine, tannic acid and graphene oxide is 1~3:1~3:1, specifically but not limited to 1:1:1, 1:2:1 , 1:3:1, 2:1:1, 2:2:1, 4:4:3, 5:5:3, 4:5:3, 5:4:3, 2:3:1, 3 :1:1, 3:2:1, 3:3:1, preferably 5:5:3. The conditions of the hydrothermal reaction are a reaction temperature of 85-180° C. and a reaction time of 2-12 hours. Preferably, phenylenediamine, tannic acid and graphene oxide are dissolved in deionized water, stirred for 20 minutes, then transferred to a reactor for hydrothermal reaction. Compar...

Embodiment 1

[0025] The preparation method of the graphene composite material doped with N and O and carbonized comprises:

[0026] (1) Hydrothermal reaction

[0027] Stir phenylenediamine, tannic acid, and graphene oxide with a mass ratio of 5:5:3 in deionized water for 20 minutes, and then transfer to a reaction kettle for 10 hours of hydrothermal reaction at 120°C to obtain a compound;

[0028] (2) Carbonization reaction

[0029] The compound was carbonized in a carbonization furnace at 600°C.

Embodiment 2

[0031] The preparation method of the graphene composite material doped with N and O and carbonized comprises:

[0032] (1) Hydrothermal reaction

[0033] Stir the phenylenediamine, tannic acid, and graphene oxide with a mass ratio of 1:1:1 in deionized water for 20 minutes, and then transfer it to a reaction kettle for 6 hours of hydrothermal reaction at 150° C. to obtain a compound;

[0034] (2) Carbonization reaction

[0035] The composite was carbonized in a carbonization furnace at 500°C.

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Abstract

The invention provides a preparation method of a sodium ion battery negative electrode material, the negative electrode material and a sodium ion battery. The preparation method of the sodium-ion battery negative electrode material comprises the following steps: (1) hydrothermal reaction: uniformly stirring phenylenediamine, tannic acid and graphene oxide in water, transferring into a reaction kettle, and carrying out hydrothermal reaction to obtain a compound; (2) carbonization reaction: carbonizing the compound in a carbonization furnace at 400-700 DEG C. In the preparation method disclosed by the invention, phenylenediamine and tannic acid can form a hard carbon material on the basis of graphene after being carbonized, more ion diffusion channels are provided, and the high-rate charge-discharge performance is improved. The phenylenediamine and the tannic acid can be used for carrying out heteroelement doping on the formed graphene composite material, so that part of active sites of the material are increased, and the overall material capacity is improved. Moreover, the carbonized graphene composite material doped with N and O also has relatively high conductivity, and when the graphene composite material is prepared into a negative plate, the addition of a conductive agent can be reduced, so the manufacturing cost of the battery is reduced.

Description

technical field [0001] The invention relates to the field of energy storage devices, in particular to a sodium ion battery, and more particularly to a preparation method of a negative electrode material of a sodium ion battery and a negative electrode material of a sodium ion battery. Background technique [0002] In recent years, due to its advantages of light weight, high voltage, high capacity, high power, stable discharge, and environmental friendliness, lithium-ion batteries have shown a wide range of applications in portable electronic devices, electric vehicles, space technology, and defense industries. Prospects and potentially huge economic benefits. However, limited lithium resources and rising lithium raw material prices limit the large-scale development of lithium-ion batteries. [0003] On the other hand, the reserve of sodium element is extremely abundant (the metal elements in the earth's crust rank fourth, accounting for 2.64% of the total reserve), and the ...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/587H01M10/054
CPCH01M4/587H01M4/624H01M10/054H01M2004/027Y02E60/10
Inventor 赵斯琦
Owner DONGGUAN CHUANGMING BATTERY TECH
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