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Preparation method of cuboid-shaped positive-pole FeF3(H2O)0.33 material

A cathode material, cuboid technology, applied in the field of preparation of cuboid-shaped FeF30.33 cathode material, can solve problems such as poor cycle performance, achieve high stability, environmental friendliness, and large specific surface area

Active Publication Date: 2013-06-12
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The object of the present invention is for hexagonal FeF 3 The existing problem of poor cycle performance provides a rectangular parallelepiped orthorhombic FeF 3 (H 2 O) 0.33 Preparation method of cathode material

Method used

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  • Preparation method of cuboid-shaped positive-pole FeF3(H2O)0.33 material

Examples

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Embodiment 1

[0028] Weigh 4.0462g FeNO 3 9H 2 O, add 25mL absolute ethanol to make 0.4mol / L FeNO 3 solution, add 0.010g cetyltrimethylammonium bromide, put it into a polytetrafluoroethylene container, and slowly add 40wt.% HF at a molar ratio of 1:4 under constant stirring at 25°C, stir for 1h, and remove into the hydrothermal reactor. Then put it in a dry box, conduct a hydrothermal reaction at 80°C for 12 hours, and cool down to obtain a pink precipitate. Pour off the supernatant, add 20 mL of absolute ethanol, wash, filter with suction, and dry at 80° C. for 12 hours in an air atmosphere to obtain a pink product. Dry in a vacuum oven at 180°C for 12 hours to obtain FeF 3 (H 2 O) 0.33 Material.

Embodiment 2

[0030] Weigh 2.7030g FeCl 3 ·6H 2 O, add 25mL absolute ethanol to make 0.4mol / L FeCl 3 solution, add 0.010g cetyltrimethylammonium bromide, put it into a polytetrafluoroethylene container, and slowly add 40wt.% HF at a molar ratio of 1:4 under constant stirring at 25°C, stir for 1h, and remove into the hydrothermal reactor. Then put it in a dry box, conduct a hydrothermal reaction at 90°C for 10 hours, and cool down to obtain a pink precipitate. Pour off the supernatant, add 40mL of absolute ethanol, wash, filter with suction, and dry at 90°C for 6h in an air atmosphere to obtain a pink product. Dry in a vacuum oven at 200°C for 10 hours to obtain FeF 3 (H 2 O) 0.33 Material.

Embodiment 3

[0032] Weigh 4.0462g FeNO 3 9H 2 O, add 50mL absolute ethanol to make 0.2mol / L FeNO 3 solution, add 0.008g citric acid, put it into a polytetrafluoroethylene container, at 25°C with constant stirring, slowly add 20wt.% HF at a molar ratio of 1:4, stir for 0.5h, and move to a hydrothermal reaction kettle. Then put it in a dry box, conduct a hydrothermal reaction at 60°C for 24 hours, and cool down to obtain a pink precipitate. Pour off the supernatant, add 20 mL of absolute ethanol, wash, filter with suction, and dry at 60° C. for 12 hours in an air atmosphere to obtain a pink product. Dry in a vacuum oven at 170°C for 15 hours to obtain FeF 3 (H 2 O) 0.33 Material.

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Abstract

The invention discloses a preparation method of a cuboid-shaped positive-pole FeF3(H2O)0.33 material. The preparation method has the following technical effects that the preparation method is simple in process, low in energy consumption and low in cost, is environment-friendly and is easy for industrial production; the prepared FeF3(H2O)0.33 material is of an orthorhombic structure, particles are of monodispersed cuboid shapes, and the cuboid particles have coarse surfaces and are large in specific surface area, so that the insertion and deinsertion of Li<+> are facilitated; and the prepared FeF3(H2O)0.33 material has high tap density and energy density and can achieve excellent electrochemical properties, particularly high power multiplying performance, without being compounded with a conductive agent (carbon materials, such as acetylene black), thereby being particularly applicable to power supply application occasions of high stability and high energy density.

Description

technical field [0001] The present invention mainly discloses a cuboid FeF 3 (H 2 O) 0.33 Preparation method of cathode material, FeF 3 (H 2 O) 0.33 The material can be used as the positive electrode material of lithium ion battery. Background technique [0002] With the global shortage of oil resources and the deteriorating climate environment, the development of modern human society is facing severe challenges. Energy and environment have become the two primary issues facing human survival and development in the 21st century. The development of new energy, renewable clean energy and the storage and conversion of energy have been highly valued by various countries, and have become one of the five most decisively influential technical fields in the development of the world economy in the 21st century. Research and development of efficient, convenient, safe and environmentally friendly new energy sources has become a common topic for governments and scientific and tech...

Claims

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Application Information

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IPC IPC(8): H01M4/58
CPCY02E60/10
Inventor 刘黎周萌王先友郭海鹏谭金黎颜子超舒洪波杨秀康邹贵山
Owner XIANGTAN UNIV
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