Flexible Bi2O2Se-based electrode material and preparation method and application thereof

A base electrode and flexible technology, applied in the field of flexible Bi2O2Se-based electrode materials and their preparation, to achieve the effects of high yield, excellent flexibility, and stable cycle performance

Active Publication Date: 2022-03-08
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that there is no Bi at present, the present invention 2 o 2 Se flexible materials and their use as anode mate...

Method used

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  • Flexible Bi2O2Se-based electrode material and preparation method and application thereof
  • Flexible Bi2O2Se-based electrode material and preparation method and application thereof
  • Flexible Bi2O2Se-based electrode material and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: a kind of flexible Bi 2 o 2 Se-based electrode material, the flexible Bi 2 o 2 The Se-based electrode material is carbon nanotubes, bismuth salt and selenium source are mixed and dissolved, heated and reacted in a liquid phase oil bath, and then dried to obtain a powder. Bi 2 o 2 Se-based electrode material.

[0029] Specific steps are as follows:

[0030]Step 1: Mixing raw materials: Take 0.1g of polyvinylpyrrolidone and 1g of carbon nanotubes, add them to 100mL of ethylene glycol, then add 1g of bismuth source, stir for 1h (solution A); take 0.2g of selenium powder and sodium borohydride 0.2g was added to 10mL deionized water, stirred for 1h (solution B), and the two solutions were ultrasonically oscillated at an ultrasonic frequency of 60kHz for 1h;

[0031] Step 2: The solution in step (1) was treated with argon gas, and then reacted in an oil bath at a temperature of 150°C for 30 minutes. After the reaction, Bi was obtained by centrifugation, w...

Embodiment 2

[0037] Embodiment 2: a kind of flexible Bi 2 o 2 Se-based electrode material, the specific preparation method is: the surfactant is cetyltrimethylammonium bromide, cetyltrimethylammonium bromide and carbon nanotubes are mixed according to the mass ratio of 0.1g and 10g, The source of bismuth is bismuth sulfate, SeO 2 Mix with the mass ratio of lithium aluminum hydride 1g and 0.1g, all the other methods are with embodiment 1.

Embodiment 3

[0038] Embodiment 3: a kind of flexible Bi 2 o 2 Se-based electrode material, the specific preparation method is: the surfactant is polyacrylonitrile, polyacrylonitrile and carbon nanotubes are mixed according to the mass ratio of 0.1g and 0.1g, the bismuth source is bismuth chloride, NaSeO 3 Mix with ascorbic acid 1g and 0.5g in mass ratio, and react in an oil bath at a temperature of 220°C for 300min to obtain Bi 2 Se 3 - Black powder of CNTs. All the other methods are described in Example 1.

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Abstract

The invention belongs to the technical field of new energy materials, and provides a flexible Bi2O2Se-based electrode material as well as a preparation method and application thereof in order to solve the problem that a Bi2O2Se flexible material and a Bi2O2Se flexible material serving as a negative electrode material cannot be applied to a flexible battery at present. The preparation method comprises the following steps: mixing and dissolving carbon nanotubes, bismuth salt and a selenium source, carrying out a liquid-phase oil bath heating reaction, drying to obtain powder, dispersing the powder and graphene in an ethanol aqueous solution for a composite reaction, carrying out suction filtration to form a film, and sintering to obtain the flexible Bi2O2Se-based electrode material. The flexible electrode material is prepared through liquid phase reaction and carbonization treatment, and has high reversible capacity, stable cycle performance and excellent rate capability. The flexible electrode can be directly used as a battery negative electrode without adding a binder, a conductive agent and a current collector, the process is simplified, and the development of the flexible electrode is facilitated. The prepared flexible sodium-ion battery negative electrode material has excellent flexibility, high specific capacity, high rate capability, excellent cycling stability and high yield, and can be used for electrodes of sodium-ion batteries, and is suitable for flexible sodium-ion battery negative electrode materials.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, in particular to a flexible Bi 2 o 2 Se-based electrode material and its preparation method and application. Background technique [0002] With the development of laptops, smart phones, foldable screens, and smart clothing, various electronic devices have begun to develop in the direction of flexibility, miniaturization, and portability. In order to adapt to the increasingly advanced electronic products, there is an urgent need for energy storage devices with lighter weight and higher energy density. Among them, lithium / sodium ion battery has become a comprehensive commercial energy storage device in the field of energy storage due to its advantages of safety, flexibility and light weight. [0003] Bi 2 o 2 Se is through [Bi 2 o 2 ] n insulating layer and Se n The conductive layers are stacked alternately. This unique structure can firstly provide high electrical conductivit...

Claims

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Application Information

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IPC IPC(8): C01B19/00H01L31/0224
CPCC01B19/008C01B19/00H01L31/022408C01P2002/72C01P2004/03C01P2004/04C01P2004/20C01P2006/40Y02E60/10
Inventor 李丹刘宏浪王延忠陈彦俊王超郭丽
Owner ZHONGBEI UNIV
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