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A method for preparing porous tubular sodium-ion battery negative electrode carbon material using plant hair as raw material

A sodium-ion battery and carbon material technology, applied in battery electrodes, secondary batteries, carbon preparation/purification, etc., can solve the problems of complex preparation process and unfavorable electrolyte penetration, etc., and achieve abundant and easy-to-obtain raw material resources and strong development Potential, low-cost effect

Active Publication Date: 2018-11-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its preparation process is relatively complicated, and there is disordered accumulation between layers and particles, which is not conducive to the complete penetration of electrolyte.

Method used

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  • A method for preparing porous tubular sodium-ion battery negative electrode carbon material using plant hair as raw material
  • A method for preparing porous tubular sodium-ion battery negative electrode carbon material using plant hair as raw material
  • A method for preparing porous tubular sodium-ion battery negative electrode carbon material using plant hair as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) remove the seeds of the loquat hair collected, wash, dry, and seal and preserve;

[0031] (2) Weigh 4.0g washed dandelion with a balance, and mix it with NH 4 F is placed in a white porcelain boat with a mass ratio of 1:0.1, placed in a tube furnace under argon protection, and the argon flow rate is 0.2 sccm·min -1 , at a heating rate of 2°C·min -1 Raise the temperature to the calcination temperature of 600°C and keep it warm for 3h.

[0032] (3) The calcined product was washed with 2 mol / L hydrochloric acid and water, and dried to obtain a porous tubular sodium ion battery negative electrode carbon material.

Embodiment 2

[0034] (1) remove the seeds of the collected dandelions, wash them, dry them, and seal them for preservation;

[0035] (2) Weigh 2.0 g of washed dandelion with a balance, and mix it with NH 4 Cl was placed in a white porcelain boat with a mass ratio of 1:0.2, and it was placed in a tube furnace under the protection of argon, and the argon flow rate was 0.1 sccm·min -1 , at a heating rate of 5°C·min -1 Raise the temperature to the calcination temperature of 1200°C and keep it warm for 5h.

[0036] (3) The calcined product was washed with 2 mol / L hydrochloric acid and water, and dried to obtain a porous tubular sodium ion battery negative electrode carbon material.

Embodiment 3

[0038] (1) remove the seeds from the collected chrysanthemum hairs, wash, dry, and seal them for preservation;

[0039] (2) Weigh 2.0 g of washed dandelion with a balance, and mix it with NH 4 F is placed in a white porcelain boat with a mass ratio of 1:0.3, placed in a tube furnace under argon protection, and the argon flow rate is 0.2 sccm·min -1 , at a heating rate of 2°C·min -1 Raise the temperature to the calcination temperature of 900°C and keep it warm for 4h.

[0040] (3) The calcined product was washed with 2 mol / L hydrochloric acid and water, and dried to obtain a porous tubular sodium ion battery negative electrode carbon material.

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Abstract

A method for preparing a porous tubular negative electrode carbon material of a sodium ion battery by taking plant hair as a raw material comprises the following steps of removing seeds of a fluff plant, and washing, drying and hermetically preserving the fluff plant; roasting the fluff plant and an ammonium salt for 1-5 hours at 600-1,200 DEG C in an inert gas according to mass ratio of 1:(0.1-0.3); and washing and drying the mixture to obtain the porous tubular negative electrode carbon material of the sodium ion battery. According to the method, the fluff plant is adopted as the raw material, the prepared tubular structured carbon material with multi-stage distribution and pore distribution has an ordered tubular structure, and the tubular structure is beneficial for an electrode to enter in order and beneficial for complete penetration of the electrolyte; and meanwhile, the specific surface is expanded by a curved structure. The preparation process disclosed by the invention is relatively simple and convenient, and the porous carbon material suitable for intercalation / de-intercalation of sodium ions can be obtained by a one-step calcination method.

Description

Technical field: [0001] The invention relates to a method for preparing a sodium ion negative electrode carbon material with controllable morphology, in particular to a method for preparing a porous tubular sodium ion battery negative electrode carbon material using plant fluff as a raw material. Background technique: [0002] With the development of science and technology and the advent of the information society, the requirements for chemical power sources are gradually increasing. Lithium-ion batteries have the characteristics of high voltage and high specific energy, so they have made great progress in portable power applications. However, lithium is expensive and has a small content in the earth's crust. As it is gradually used in electric vehicles, the demand for lithium will increase greatly. However, the limited reserves and uneven storage distribution of lithium will restrict the large-scale development of long-life energy storage batteries [Liu Chunna. Research pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583H01M4/62H01M10/054C01B32/05
CPCH01M4/583H01M4/625H01M10/054Y02E60/10
Inventor 黄剑锋王彩薇李嘉胤曹丽云许占位欧阳海波李文斌王瑞谊
Owner SHAANXI UNIV OF SCI & TECH
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