One-dimensional In<2>O<3>/C fiber composite material, and preparation method and application thereof

A fiber composite material and composite material technology, applied in the fields of new energy, electrochemistry, and energy storage materials, can solve the problems of poor cycle stability and low specific capacity, improve cycle performance and service life, and the synthesis method is simple and environmentally friendly. The effect of the application foreground

Inactive Publication Date: 2017-05-10
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a one-dimensional In 2 o 3 / C fiber composite material, its preparation method and application, its purpose is to prepare a kind of In with uniform linear structure by adopting electrospinning technology 2 o 3 / C fiber composite material, the diameter ranges from 600 to 750 nanometers, the length ranges from 5 to 10 microns, In 2 o 3 The particles are evenly distributed inside and outside the carbon fiber, the particle size is about 30-50 nanometers, and it is applied to the negative electrode material of lithium ion battery, and it is found that it has good cycle stability, thus solving the problem of the negative electrode material of indium oxide lithium ion battery in the prior art Technical problems of poor cycle stability and low specific capacity

Method used

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  • One-dimensional In&lt;2&gt;O&lt;3&gt;/C fiber composite material, and preparation method and application thereof
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  • One-dimensional In&lt;2&gt;O&lt;3&gt;/C fiber composite material, and preparation method and application thereof

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preparation example Construction

[0034] The one-dimensional In 2 o 3 The preparation method of / C fiber composite material, comprises the following steps:

[0035] (1) Mix indium salt, polyacrylonitrile and N,N-dimethylformamide according to the mass ratio of 0.75~1:1~1.25:10~10.75 to prepare the indium salt precursor spinning solution; the indium salt is preferably Be indium nitrate, the mass ratio is preferably 1:1:10.5;

[0036] (2) Spinning the precursor spinning solution described in step (1) under high pressure to obtain a precursor one-dimensional fiber; the spinning voltage is 15-22KV, and the injection rate is 0.5-1.2mm / min; preferably The spinning voltage is 22KV, and the injection rate is 1.2mm / min;

[0037] (3) Calcining the one-dimensional fiber described in step (2) in an inert atmosphere, preferably in a nitrogen atmosphere, at a heating rate of 5°C / min to 500-650°C for 3-5 hours, and then cooling to obtain carbonized fibers;

[0038] (4) Calcining the carbonized fibers described in step (3) ...

Embodiment 1

[0043] a kind of like figure 1 The one-dimensional In of the present invention shown 2 o 3 The preparation method of / C fiber composite material, comprises the following steps:

[0044] (1) Preparation of spinning precursor solution: weigh indium nitrate (In(NO 3 ) 3 ), polyacrylonitrile (PAN) and N,N-dimethylformamide (DMF), stirred for 24 hours, and mixed uniformly to obtain a spinning precursor solution.

[0045] (2) Preparation of fiber precursor: the spinning precursor solution prepared in the above step (1) was spun in an electrospinning device with a voltage of 22KV and a bolus injection rate of 1.2mm / min.

[0046] (3) Preparation of fiber with stable structure: The fiber precursor described in (2) above was calcined in nitrogen at a temperature of 650° C. for 5 hours to obtain a fiber with stable structure.

[0047] (4) One-dimensional In 2 o 3 Preparation of / C fiber composite lithium ion negative electrode material: the structurally stable fiber obtained in th...

Embodiment 2

[0051] a kind of like figure 1 The one-dimensional In of the present invention shown 2 o 3 The preparation method of / C fiber composite material, comprises the following steps:

[0052] (1) Preparation of spinning precursor solution: Weigh indium nitrate (In(NO 3 ) 3 ), polyacrylonitrile (PAN) and N,N-dimethylformamide (DMF), stirred for 24 hours, and mixed uniformly to obtain a spinning precursor solution.

[0053] (2) Preparation of fiber precursor: the spinning precursor solution prepared in the above step (1) was spun in an electrospinning device with a voltage of 20KV and a bolus rate of 1mm / min.

[0054] (3) Preparation of fiber with stable structure: the fiber precursor described in (2) above was calcined in nitrogen at a temperature of 600° C. for 4 hours to obtain a fiber with stable structure. .

[0055] (4) One-dimensional In 2 o 3 Preparation of / C fiber composite lithium ion negative electrode material: the structurally stable fiber obtained in the above (...

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Abstract

The invention discloses a one-dimensional In<2>O<3> / C fiber composite material, and a preparation method and an application thereof. The preparation method comprises the following steps of (1) uniformly mixing an indium salt and polyacrylonitrile (PAN) in a solvent to obtain a spinning precursor mixed solution; (2) performing electrostatic spinning on the spinning precursor mixed solution at a high voltage to obtain a fiber precursor; (3) calcining the obtained fiber precursor in a nitrogen atmosphere at a temperature of 500-650 DEG C for 3-5h; and (4) performing calcining in air atmosphere at a temperature of 100-120 DEG C for 3-5h to obtain the one-dimensional In<2>O<3> / C fiber composite material. The prepared one-dimensional In<2>O<3> / C fiber composite material is uniform in structure, tiny in indium oxide particle dimensions and uniformly distributed inside and outside carbon fibers; and when the fiber composite material is used for a negative electrode of a lithium ion battery, capacity which is as high as 350mAh g<-1> after 100 circles at 100mA g<-1> can be realized.

Description

technical field [0001] The invention relates to the field of energy storage materials, new energy sources and electrochemistry, especially one-dimensional In 2 o 3 / C fiber composite material, its preparation method and application. Background technique [0002] With the increasing demand for energy in the world, oil, coal, natural gas, etc. are rapidly consumed as main energy sources, and their combustion will also produce greenhouse gases and other toxic and harmful substances (SO 2 , NO 2 etc.), therefore, finding renewable green energy is the most urgent task at present. [0003] Lithium-ion batteries, as a new type of energy in the 1990s, have attracted widespread attention and are widely used in electric vehicles, mobile devices, power station energy storage and other fields. The lack of excellent anode materials is also one of the main reasons for the limited capacity and service life of lithium-ion batteries. Traditional metal oxide anode materials have the adva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/583H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/36H01M4/48H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 朱明强赵晗
Owner HUAZHONG UNIV OF SCI & TECH
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