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Preparation method and application of one-dimensional rod-like CuFeS2 compound

A compound and rod-shaped technology is applied in the field of preparation of one-dimensional rod-shaped CuFeS2 compounds to achieve the effects of good capacity retention, low synthesis cost and fast purification method.

Active Publication Date: 2015-02-18
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the further development of society (such as the requirements of electric vehicles on power sources), the existing lithium-ion battery system still needs to be improved in terms of price, safety, specific capacity and power performance, and the abundance of raw materials.

Method used

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  • Preparation method and application of one-dimensional rod-like CuFeS2 compound
  • Preparation method and application of one-dimensional rod-like CuFeS2 compound
  • Preparation method and application of one-dimensional rod-like CuFeS2 compound

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Embodiment 1

[0029] Material preparation:

[0030] A certain amount of FeSO 4 ·7H 2 O, CuSO 4 ·5H 2 O and Na 2 S 2 o 3 ·5H 2O was dissolved in the same deionized water solution to prepare solutions with concentrations of 0.4mol / L, 0.2mol / L and 0.4mol / L, respectively, adding sulfur powder at a ratio of 0.0032g / mL, and magnetic stirring for a certain period of time The mixture was transferred to a reaction kettle, and the temperature was naturally raised to 210° C. in a blast oven, and reacted for 24 hours. After it was lowered to room temperature, it was taken out for several times of filtration and washing. The washed product is dried in a vacuum oven at 40-60°C for 12-24h.

[0031] Material Characterization:

[0032] The morphology of the material was analyzed by a scanning electron microscope (HITACHI S-4800). figure 1 , it can be seen from the figure that the electrode material is a nanoscale one-dimensional rod material, and the average diameter of the rod is 500nm. Take it ...

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Abstract

The invention relates to a preparation method and application of a one-dimensional rod-like CuFeS2 compound, and relates to an alloy type transition metal sulfide. The preparation method comprises the following steps of: dissolving water-soluble cupric inorganic salt and water-soluble ferrous inorganic salt into deionized water, then adding sulfur powder, and stirring into yellow green turbid liquid; carrying out hydrothermal reaction in a hydrothermal kettle, and then centrifuging, cleaning and drying to obtain a grey black final product, namely the one-dimensional rod-like CuFeS2 compound. The one-dimensional rod-like CuFeS2 compound prepared through the method disclosed by the invention can be used as a secondary battery electrode material. The preparation method disclosed by the invention can be used for preparing the one-dimensional rod-like CuFeS2 compound by utilizing a hydrothermal synthesis method, is simple in synthetic method and low in raw material cost, and adopts the water-soluble cupric salt, ferrous salt (ferrous ion) and the deionized water as reaction solvents. The synthesized material as a positive material or negative material of a secondary battery has good circulating property. A secondary lithium ion battery which takes the synthesized material as a positive pole has the advantages of excellent circulating property and good capacity retention ratio.

Description

technical field [0001] The present invention relates to alloy-type transition metal sulfides, in particular to one-dimensional rod-like CuFeS 2 Preparation methods and applications of compounds. Background technique [0002] CuFeS 2 As an alloy-type transition metal sulfide, due to the multi-electron electrochemical reaction involved in the charging and discharging process, the theoretical mass specific capacity can reach 587mAh / g, and the mass specific energy can reach 881Wh / kg (25°C). In recent years, such transition metal sulfides have gradually attracted the attention of scientific researchers. At present, the existing synthetic methods are reported, mainly the preparation of thin films by atomic layering (Barkat, L., et al. (2006). "Growth and characterization of CuFeS 2 thin films."Journal of Crystal Growth297(2):426-431.); Hydrothermal synthesis of nanorods (Wang, M.X., et al.(2009)."Single crystal of CuFeS 2 nanowires synthesized through solventhermal process."Ma...

Claims

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Application Information

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IPC IPC(8): H01M4/58C01G49/12
CPCC01G49/12H01M4/5815Y02E60/10
Inventor 赵金保王昀晖李雪
Owner XIAMEN UNIV
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