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Preparation method and application of sulfur-doped polyacrylonitrile-chlorella derived carbon compound sodium ion battery negative electrode material

A sulfur polyacrylonitrile, sodium ion battery technology, applied in battery electrodes, active material electrodes, secondary battery manufacturing, etc., can solve problems that have not been reported in the literature, and achieve the effects of inhibiting dissolution, simple operation, and low cost

Active Publication Date: 2021-12-21
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coupled modification strategy using chlorella-derived carbon to bind sulfur-doped polyacrylonitrile has not been reported in the literature so far.

Method used

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  • Preparation method and application of sulfur-doped polyacrylonitrile-chlorella derived carbon compound sodium ion battery negative electrode material
  • Preparation method and application of sulfur-doped polyacrylonitrile-chlorella derived carbon compound sodium ion battery negative electrode material
  • Preparation method and application of sulfur-doped polyacrylonitrile-chlorella derived carbon compound sodium ion battery negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Blend 0.5 g of anhydrous tin dichloride, 0.5 g of polyacrylonitrile, 0.23 g of chlorella and 10 mL of N-N dimethylformamide, and magnetically stir for 24 h to obtain a uniform spinning solution. ;

[0029] (2) Take the spinning solution prepared in the above step (1) in the syringe, set the spinning voltage to 23 kV, the plug flow rate to 0.3 mL / h, the receiving distance to 15 cm, and the temperature to 40 o C, PAN / SnCl prepared by electrospinning 2 carbon composite fibers;

[0030] (3) Place the composite fiber prepared in the above step (2) and a certain amount of sulfur powder in a tube furnace at a mass ratio of 1:5. Under an Ar atmosphere, with a gas flow rate of 80 mL / min, 5 oC / min rate of heating at 470 o C Calcination time 1 h, that is, sulfur-doped polyacrylonitrile-chlorella derived carbon composite;

[0031] attached figure 1 It is the XRD pattern of sulfur-doped polyacrylonitrile-chlorella-derived carbon composite, from which the diffraction peak ...

Embodiment 2

[0034] (1) Blend 1 g of anhydrous tin dichloride, 1 g of polyacrylonitrile, 0.6 g of chlorella and 20 mL of N-N dimethylformamide, and magnetically stir for 24 h to obtain a uniform spinning solution for later use ;

[0035] (2) Take the spinning solution prepared in the above step (1) in the syringe, set the spinning voltage to 23 kV, the plug flow rate to 0.5 mL / h, the receiving distance to 15 cm, and the temperature to 35 o C, PAN / SnCl prepared by electrospinning 2 carbon composite fibers;

[0036] (3) Place the composite fiber prepared in the above step (2) and a certain amount of sulfur powder in a tube furnace at a mass ratio of 1:5, and in an Ar atmosphere, with a gas flow rate of 60 mL / min, 2 oC / min rate of heating at 450 o C Calcination time 1 h, that is, sulfur-doped polyacrylonitrile-chlorella derived carbon composite;

[0037] The sulfur-doped polyacrylonitrile-chlorella-derived carbon composite prepared in this example is used as the active component of the ...

Embodiment 3

[0039] (1) Blend 10 g of tin sulfate, 10 g of polyacrylonitrile, 8 g of chlorella, and 50 mL of N-N dimethylformamide, and magnetically stir for 24 h to obtain a uniform spinning solution for later use;

[0040] (2) Take the spinning solution prepared in the above step (1) in the syringe, set the spinning voltage to 25 kV, the plug flow rate to 0.6 mL / h, the receiving distance to 18 cm, and the temperature to 40 o C, PAN / SnCl prepared by electrospinning 2 carbon composite fibers;

[0041] (3) Place the composite fiber prepared in the above step (2) and a certain amount of sulfur powder in a tube furnace at a mass ratio of 1:5. Under an Ar atmosphere, with a gas flow rate of 80 mL / min, 5 oC / min rate of heating at 500 o C Calcination time 1 h, that is, sulfur-doped polyacrylonitrile-chlorella derived carbon composite;

[0042] The sulfur-doped polyacrylonitrile-chlorella-derived carbon composite prepared in this example is used as the active component of the negative electr...

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Abstract

The invention discloses a preparation method and application of a sulfur-doped polyacrylonitrile-chlorella derived carbon compound sodium-ion battery negative electrode material. According to the technical scheme, the preparation method comprises the following steps: blending a tin source, polyacrylonitrile, chlorella and N,N-dimethylformamide, stirring for a certain time to obtain a spinning solution for later use, and then carrying out electrospinning and vulcanization to prepare the sulfur-doped polyacrylonitrile-chlorella derived carbon compound sodium ion battery negative electrode material. The method is simple to operate, wide in raw material source, low in cost and environment-friendly; the chlorella is wide in source, rich in functional groups and low in cost, and carbon derived from the chlorella is rich in N and P heteroatom doping; the compound has excellent sodium storage performance, and the specific capacity reaches up to 570 mAh / g after 100 cycles of charge and discharge under the current density of 0.5 A / g; and the specific capacity is stabilized at 229 mAh / g after 30000 cycles of charging and discharging under the super-large current density of 15 A / g, and the coulombic efficiency is close to 100%.

Description

technical field [0001] The invention belongs to the field of sodium-ion battery materials, and in particular relates to a preparation method and application of a sulfur-doped polyacrylonitrile-chlorella-derived carbon composite sodium-ion battery negative electrode material. Background technique [0002] In the past ten years, lithium-ion batteries have developed rapidly and are widely used in various electronic devices and new energy vehicles. However, limited by lithium resource reserves, it is difficult to maintain future human demand for energy storage equipment, coupled with uneven distribution of lithium resources. Therefore, it is urgent to develop new and efficient energy storage devices for the next generation. Based on the similar physical and chemical properties and electrochemical behavior of metal sodium and lithium, and the low energy density of sodium-ion batteries, abundant reserves in the earth's crust, and low cost, it is considered to be one of the most p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/587H01M4/62H01M10/04H01M10/054D01D5/00D01D5/30
CPCH01M4/362H01M4/5815H01M4/587H01M4/628H01M4/624H01M10/054H01M10/0427D01D5/003D01D5/30H01M2004/027Y02E60/10Y02P70/50
Inventor 曾令兴汪依依陈潇川罗奋强陈庆华钱庆荣黄宝铨肖荔人曹长林夏新曙
Owner FUJIAN NORMAL UNIV
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