Preparation method of metal sulfide and carbon composite material and application of metal sulfide and carbon composite material in sodium ion battery

A metal sulfide and composite material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of unfavorable sodium ion reversible de-intercalation, small lattice constant, poor electrical conductivity, etc., and is suitable for large-scale development and Application, high specific capacity, low cost effect

Inactive Publication Date: 2017-07-28
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with metal oxide anode materials (such as Sn, Sb, Si, etc.), the specific capacity of commercial hard carbon anode materials is still low
However, metal oxide anode materials still have disadvantages such as small lattice constant, which is not conducive to the reversible deintercalation of sodium ions, and poor conductivity.

Method used

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  • Preparation method of metal sulfide and carbon composite material and application of metal sulfide and carbon composite material in sodium ion battery
  • Preparation method of metal sulfide and carbon composite material and application of metal sulfide and carbon composite material in sodium ion battery
  • Preparation method of metal sulfide and carbon composite material and application of metal sulfide and carbon composite material in sodium ion battery

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Embodiment 1

[0032] In this embodiment, an in-situ method is adopted to introduce a sulfur source, and stannous sulfide and a carbon composite material are prepared by electrospinning as a negative electrode material for a sodium ion battery. The specific steps are:

[0033]The metal salt is 0.006mol of tin tetrachloride, the spinning polymer is mixed with 0.65g of polyacrylonitrile and 0.00945mol of L-cysteine ​​and dissolved in 10ml of organic solvent dimethylformamide (DMF), and the mixture is heated at 40°C Under the condition of PH value 6, magnetic stirring for 12 hours, the electrospinning precursor solution was obtained; under the condition of temperature 40 °C and humidity 10%, the precursor solution flowed to the spinning needle at a constant speed of 10 μl / min, and the distance from the needle to the receiver was adjusted to 20cm, under the action of an electrostatic field of 12kV, nanofibers are formed, and the receiver is used to receive the fibers to form spun fiber cloth; the...

Embodiment 2

[0036] In this embodiment, a post-treatment method is adopted to introduce a sulfur source, and a composite material of antimony trisulfide and carbon is obtained by electrospinning as a negative electrode material for a sodium ion battery. The specific steps are:

[0037] 0.01mol of antimony chloride and 0.6g of polyacrylonitrile were mixed and dissolved in 10ml of DMF. The mixture was stirred at 40°C with a pH value of 6 and magnetically stirred for 12 hours to obtain an electrospinning precursor solution; at a temperature of 40°C and a humidity of 10%, Flow the precursor solution to the spinning needle at a constant speed of 10 μl / min, adjust the distance from the needle to the receiver to 20cm, form nanofibers under the action of an electrostatic field of 12kV, and use the receiver to accept the fibers to form spinning fiber cloth; Carry out pre-oxidation in a muffle furnace, the heating rate is 2-10°C / min, the pre-oxidation temperature is 250°C, keep warm for 1h, and cool ...

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Abstract

The invention discloses a preparation method of a metal sulfide and carbon composite material and application of the metal sulfide and carbon composite material in a sodium ion battery. Sulfide mainly comprises FeS, CuS, NiS, CdS, SnS2, SnS, Sb2S3, Bi2S3 and the like. The composite material is prepared from metal sulfide and C through a compounding method. Sulfide accounts for 40 to 80 percent of the weight of the material. According to the preparation method of the metal sulfide and carbon composite material, different methods are adopted to introduce a sulfur source and an electrospinning method is adopted to prepare the metal sulfide and carbon composite material; and the introduction of the sulfur source is realized respectively through in-situ introduction and post-treatment method. The metal sulfide and carbon composite material prepared through the preparation method is used as a sodium ion battery anode material, has the advantages of high specific capacity and high circulating stability and is low in manufacturing cost and suitable for large-scale development and application of the sodium ion battery.

Description

technical field [0001] The invention relates to a preparation method of a metal sulfide and a composite material thereof and an application in a sodium ion battery, belonging to the field of secondary batteries. Background technique [0002] In recent years, due to its advantages of light weight, high voltage, high capacity, high power, stable discharge, and environmental friendliness, lithium-ion batteries have shown broad potential in portable electronic devices, electric vehicles, space technology, and defense industries. Application prospects and potential huge economic benefits. However, limited lithium resources and rising lithium raw material prices limit the large-scale development of lithium-ion batteries. [0003] On the other hand, the reserves of sodium element are extremely abundant (the metal elements in the earth's crust rank fourth, accounting for 2.64% of the total reserves), and the price is low. It is in the same main group as lithium, with similar chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/62H01M10/054
CPCH01M4/362H01M4/5815H01M4/583H01M4/625H01M10/054Y02E60/10
Inventor 姜银珠朱杭
Owner ZHEJIANG UNIV
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