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A kind of preparation method of sodium ion battery negative electrode carbon material containing multi-level pore size distribution

A sodium-ion battery, pore size distribution technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of unfavorable electrolyte penetration, complex preparation process, etc., and achieve the effect of improving pseudocapacitive capacity and enhancing adsorption capacity

Active Publication Date: 2018-06-26
FUJIAN XINSEN CARBON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 kind of preparation method of sodium ion battery negative electrode carbon material containing multi-level pore size distribution
  • A kind of preparation method of sodium ion battery negative electrode carbon material containing multi-level pore size distribution
  • A kind of preparation method of sodium ion battery negative electrode carbon material containing multi-level pore size distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) The dandelion collected is cleaned, dried, and sealed for preservation;

[0034] (2) Weigh 2.0 g of washed dandelion with a balance, put it in a beaker, then add phosphoric acid with a mass fraction of 85%, and the mass ratio of phosphoric acid and dandelion is 1:1, heat in a vacuum oven at 60°C for 24 hours , to obtain product A.

[0035] (3) NaClO 4 、Na 2 CO 3 , NaH 2 PO 4 Mix evenly with a mass ratio of 1:1:0.6 to obtain product B;

[0036] (4) Mix product A and product B at a mass ratio of 1:1, grind in a mortar for 30 minutes, and then add 40 mL of water to dissolve to obtain product C;

[0037] (4) heating product C in a vacuum oven at 60°C for 24 hours to obtain product D;

[0038] (5) Place the product D in a white porcelain boat, place it in a tube furnace for calcination, under the protection of argon, and the flow rate of the argon gas flow is 0.5 sccm·min -1 , at 5°C·min -1 The heating rate is increased to a calcination temperature of 500°C, and...

Embodiment 2

[0041] (1) The dandelion collected is cleaned, dried, and sealed for preservation;

[0042](2) Take 2.0 g of washed dandelions with a balance, place them in a beaker, then add phosphoric acid with a mass fraction of 85%, the mass ratio of phosphoric acid and dandelions is 2:1, and heat in a vacuum oven at 60°C for 24 hours, Product A is obtained.

[0043] (3) NaClO 4 、Na 2 CO 3 , NaH 2 PO 4 Mix evenly with a mass ratio of 1:1.2:0.8 to obtain product B;

[0044] (4) After mixing product A and product B at a mass ratio of 5:1, grind them in a mortar for 30 minutes, then add 30 mL of water to dissolve to obtain product C;

[0045] (5) heating product C in a vacuum oven at 50°C for 24 hours to obtain product D;

[0046] (6) Place the product D in a white porcelain boat, place it in a tube furnace for calcination, under the protection of argon, and the flow rate of the argon gas flow is 0.2 sccm·min -1 , at 2°C·min -1 The heating rate was increased to a calcination tempera...

Embodiment 3

[0051] (1) The dandelion collected is cleaned, dried, and sealed for preservation;

[0052] (2) Weigh 2.0 g of washed dandelion with a balance, place it in a beaker, then add phosphoric acid with a mass fraction of 85%, and the mass ratio of phosphoric acid and dandelion is 3:1, heat in a vacuum oven at 80°C for 24 hours , to obtain product A.

[0053] (3) NaClO 4 、Na 2 CO 3 , NaH 2 PO 4 Mix evenly with a mass ratio of 1:1.5:0.6 to obtain product B;

[0054] (4) After mixing product A and product B at a mass ratio of 6:1, grind them in a mortar for 30 minutes, then add 20 mL of water to dissolve to obtain product C;

[0055] (5) heating product C in a vacuum oven at 30°C for 24 hours to obtain product D;

[0056] (6) Place the product D in a white porcelain boat, place it in a tube furnace for calcination, under the protection of argon, and the flow rate of the argon gas flow is 0.1 sccm·min -1 , at 4°C·min -1 The heating rate is increased to a calcination temperature...

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Abstract

Provided is a method for preparing a multistage pore diameter distribution containing sodium-ion battery negative electrode carbon material. After dandelion is soaked with phosphoric acid, a product A is obtained; NaClO4, Na2CO3 and NaH2PO4 are mixed to be uniform according to the mass ratio of 1:(1.0-1.5):(0.6-0.8), and a product B is obtained; the product A and the product B are dissolved in water after being mixed to be uniform according to the mass ratio of (1-10):1, and a product C is obtained; the products are heated and then calcined for 1 h to 5 h, and the material can be obtained. Phosphoric acid in the material is activated to pre-carbonize the material, most of xylan, most of lignin, a small part of glucan and cellulose exposed to the surfaces of cell walls are removed, and conditions are provided for later treatment. Meanwhile, a large number of apertures different in size are generated, PO4<3-> is embedded into a carbon substrate, a C-O-P bond can be generated during later carbonization, more active sites can be generated, and the faradaic pseudocapacitance capacity of the material is improved.

Description

technical field [0001] The invention relates to a preparation method of a sodium ion negative electrode carbon material with controllable morphology, in particular to a preparation method of a sodium ion battery negative electrode carbon material with multi-level pore size distribution. 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 progress of fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/587H01M4/62H01M10/054
CPCH01M4/364H01M4/587H01M4/624H01M10/054Y02E60/10
Inventor 黄剑锋王彩薇李嘉胤曹丽云许占位欧阳海波郭玲席乔
Owner FUJIAN XINSEN CARBON
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