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Preparation method and application of tin selenide-selenium-doped polyacrylonitrile compound potassium ion battery negative electrode material

A polyacrylonitrile, battery negative electrode technology, applied in battery electrodes, circuits, electrical components, etc., to achieve the effect of environmental friendliness, narrow band gap, and fast kinetics

Active Publication Date: 2021-12-17
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth mentioning that there are no reports on the use of SePAN in the literature and patents of potassium-ion battery anode materials.

Method used

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  • Preparation method and application of tin selenide-selenium-doped polyacrylonitrile compound potassium ion battery negative electrode material
  • Preparation method and application of tin selenide-selenium-doped polyacrylonitrile compound potassium ion battery negative electrode material
  • Preparation method and application of tin selenide-selenium-doped polyacrylonitrile compound potassium ion battery negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of spinning solution: Weigh 0.7 g of anhydrous tin dichloride and 0.5 g of polyacrylonitrile and dissolve in 10 mL of N-N dimethylformamide, stir magnetically for 24 h to obtain uniform spinning solution, spare;

[0032] (2) Electrospinning: Take the uniform 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 composite fiber;

[0033] (3) Preparation of tin selenide-selenium-doped polyacrylonitrile composite material: the PAN / SnCl prepared in the above step (2) 2 The composite fiber and selenium powder were respectively placed in different corundum boats according to the mass ratio of 1:2, and were heated in an Ar atmosphere tube furnace with 5 o The heating rate of C / min is calcined at 470 °C for 1 hour, which is the tin selenide-selenium-doped polyacrylonitrile composit...

Embodiment 2

[0037] (1) Preparation of spinning solution: Weigh 0.7 g of anhydrous tin dichloride and 0.7 g of polyacrylonitrile and dissolve in 15 mL of N-N dimethylformamide, stir magnetically for 24 h to obtain uniform spinning solution, spare;

[0038] (2) Electrospinning: Take the uniform spinning solution prepared in the above step (1) in the syringe, set the spinning voltage to 23 kV, the plug flow rate to 0.6 mL / h, the receiving distance to 18 cm, and the temperature to 35 o C, PAN / SnCl prepared by electrospinning 2 composite fiber;

[0039] (3) Preparation of tin selenide-selenium-doped polyacrylonitrile composite material: the PAN / SnCl prepared in the above step (2) 2 The composite fiber and selenium powder were placed in different corundum boats according to the mass ratio of 1:2, and placed in an Ar atmosphere tube furnace for 5 o The heating rate of C / min is calcined at 500 °C for 1 hour, which is the tin selenide-selenium doped polyacrylonitrile composite material.

[004...

Embodiment 3

[0042] (1) Preparation of spinning solution: Weigh 1.4 g of stannous sulfate and 6 g of polyacrylonitrile and dissolve in 50 mL of N-N dimethylformamide, stir magnetically for 24 h to obtain a uniform spinning solution, and set aside ;

[0043] (2) Electrospinning: Take the uniform spinning solution prepared in the above step (1) in the syringe, set the spinning voltage to 25 kV, the flow rate to 0.8 mL / h, the receiving distance to 18 cm, and the temperature to 40 o C, PAN / SnCl prepared by electrospinning 2 composite fiber;

[0044] (3) Preparation of tin selenide-selenium-doped polyacrylonitrile composite material: the PAN / SnCl prepared in the above step (2) 2 The composite fiber and selenium powder were respectively placed in different corundum boats according to the mass ratio of 1:2, and placed in an Ar atmosphere tube furnace with 10 o The heating rate of C / min is calcined at 600 °C for 1 hour, which is the tin selenide-selenium-doped polyacrylonitrile composite materi...

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Abstract

The invention discloses a preparation method and application of a tin selenide-selenium-doped polyacrylonitrile compound potassium ion battery negative electrode material, the experimental process is simple and convenient to operate, and the conditions are controllable, and the technical scheme is as follows: blending and stirring a certain amount of a tin source, polyacrylonitrile and N-N dimethylformamide, then carrying out electrospinning to obtain PAN / SnCl2 composite fibers, and further calcining and selenizing to obtain the tin selenide-selenium-doped polyacrylonitrile compound potassium ion battery negative electrode material. The negative electrode material of the potassium ion battery is stable in long cycle performance, and the specific capacity is still stabilized at 397 mAh / g after more than 1000 cycles of charge and discharge cycles under the current density of 0.5 A / g; and the specific capacity can still be stabilized at 301 mAh / g after 2500 cycles of charging and discharging under the current density of 1 A / g.

Description

technical field [0001] The invention belongs to the field of potassium ion battery materials, and in particular relates to a preparation method and application of a tin selenide-selenium-doped polyacrylonitrile composite potassium ion battery negative electrode material. Background technique [0002] In recent years, due to its abundant natural potassium resources, fast ion transport of potassium ions in organic electrolytes, low standard redox potential, wider potential window, and higher energy density, potassium-ion batteries have become promising candidates for future large-scale applications. Practical energy storage systems have been extensively studied. Based on the potential advantages of potassium-ion batteries, researchers are committed to developing new high-capacity electrode materials to promote the practical application of potassium-ion batteries. [0003] Tin-based anode materials, especially those tin oxides (SnO 2 ), tin sulfide (SnS, SnS 2 ) and tin sele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36
CPCH01M4/362Y02E60/10
Inventor 曾令兴汪依依郑金高陈潇川陈庆华钱庆荣黄宝铨肖荔人孙晓丽曹长林
Owner FUJIAN NORMAL UNIV
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