One-dimensional antimony sulfide-carbon composite material and preparation method and application thereof

A carbon composite material and a composite material technology, applied to one-dimensional antimony sulfide-carbon composite materials, in the field of its preparation, can solve the problems of carbon nanotube composite difficulty, poor cycle stability, low specific capacity, etc., and achieve uniform morphology and performance. Good, high specific capacity effect

Active Publication Date: 2017-02-15
HUAZHONG UNIV OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a one-dimensional antimony sulfide-doped carbon nanowire composite material and its preparation method and application. 3 Combining the reduction method and vacuum high-temperature vulcanization, the active nanomaterial antimony sulfide is embedded in carbon nanowires to prepare the antimony sulfide negative electrode material for lithium ion batteries of the present invention, thus solving the problem of using antimony sulfide composite materials in the prior art as lithium ion battery negative electrodes The material has problems such as poor cycle stability, low specific capacity, and difficulty in compounding with carbon nanotubes.

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  • One-dimensional antimony sulfide-carbon composite material and preparation method and application thereof
  • One-dimensional antimony sulfide-carbon composite material and preparation method and application thereof
  • One-dimensional antimony sulfide-carbon composite material and preparation method and application thereof

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[0031] The preparation method of the one-dimensional antimony sulfide-carbon nanowire composite material proposed by the present invention comprises the following steps:

[0032] (1) Antimony chloride, polyacrylonitrile, and N,N-dimethylformamide are uniformly mixed in a mass ratio of 0.07-0.11:0.07-0.11:1 to prepare an antimony salt precursor spinning solution;

[0033] (2) Spinning the precursor spinning solution obtained in step (1) under high pressure to obtain a precursor one-dimensional nanowire; wherein the spinning voltage is 18-22KV, preferably 20KV, and the spinning bolus rate is 0.2- 1.0mm / min, preferably 0.6mm / min;

[0034] (3) Calcining the one-dimensional nanowire obtained in step (2) at a high temperature in a hydrogen / argon atmosphere, the volume ratio of the hydrogen / argon gas mixture is 10:90, and obtaining a one-dimensional antimony-doped carbon nanowire after cooling; The calcination temperature is 550-750°C, and the calcination time is 6-10h;

[0035] (4...

Embodiment 1

[0041] a kind of like figure 1 The preparation method of the shown one-dimensional antimony sulfide-carbon nanowire composite material comprises the following steps:

[0042] (1) Preparation of spinning precursor solution: Weigh antimony chloride, PAN and DMF at a mass ratio of 0.09:0.09:1, stir for 24 hours, and mix them uniformly to obtain a spinning precursor solution.

[0043] (2) Preparation of nanowire 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 0.6mm / min.

[0044] (3) Preparation of one-dimensional Sb / C nanowire composite material: the nanowire precursor obtained in the above (2) is placed in a tube furnace for calcination (10:90, Vol), and the calcination temperature is 650°C, the calcination time is 6h, and the heating rate is 5°C / min.

[0045] (4) Preparation of one-dimensional antimony sulfide-carbon nanowire composite material: Sulfurize the structurally...

Embodiment 2

[0048] a kind of like figure 1 The preparation method of the shown one-dimensional antimony sulfide-carbon nanowire composite material comprises the following steps:

[0049] (1) Preparation of spinning precursor solution: Weigh antimony chloride, PAN and DMF in a mass ratio of 0.07:0.11:1, stir for 24 hours, and mix them uniformly to obtain a spinning precursor solution.

[0050] (2) Preparation of nanowire precursor: the spinning precursor solution prepared in the above step (1) was spun in an electrospinning device with a voltage of 18KV and a bolus rate of 0.2mm / min.

[0051] (3) Preparation of one-dimensional Sb / C nanowire composite material: the nanowire precursor obtained in the above (2) is placed in a tube furnace for calcination (10:90, Vol), and the calcination temperature is 750°C, calcination time 10h, heating rate 10°C / min, to obtain a one-dimensional Sb / C nanowire composite material.

[0052] (4) Preparation of one-dimensional antimony sulfide-carbon nanowire ...

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Abstract

The invention discloses a one-dimensional antimony sulfide-carbon composite material and a preparation method thereof. The one-dimensional Sb2S3 / C nanowire composite material prepared according to the method is uniform in structure, and antimony sulfide particles are regular and are uniformly distributed inside and on surfaces of the carbon nanowires. The preparation method has advantages of simplicity and easiness in acquisition of raw materials, low cost, simplicity in synthesis process and environment friendliness. When the composite material serves as a lithium ion battery cathode material, high cycling stability, high specific capacity and effectiveness in inhibition of alloying volume expansion in a cycling process are realized, and capacity of 551mAh'g<-1> is achieved after 150 cycles at 100mA'g<-1>.

Description

technical field [0001] The invention relates to the fields of energy storage materials, new energy sources and electrochemistry, in particular to a one-dimensional antimony sulfide-carbon composite material, its preparation method and application. Background technique [0002] Energy and the environment are two severe challenges that mankind must face when entering the 21st century. The development of new energy and renewable clean energy is one of the most decisive technologies in today's world economy. Especially with the gradual reduction of non-renewable energy sources such as petroleum, coal, and natural gas and the increasingly serious environmental problems, the research and application of high-efficiency, environmental protection, and energy-saving new energy material technologies are becoming more and more important. Lithium-ion batteries have characteristics unmatched by other secondary batteries, and have been widely used in emerging portable electronic products s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M4/58H01M10/0525H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/362H01M4/5815H01M4/583H01M4/625H01M10/0525H01M10/054Y02E60/10
Inventor 朱明强张唯余翔翔喻能
Owner HUAZHONG UNIV OF SCI & TECH
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