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Micron-scale spheroidal ferric fluoride positive electrode material and preparation method thereof

A positive electrode material, ferric fluoride technology, applied in the direction of ferric halide, battery electrodes, electrical components, etc., can solve the problems of complex and harsh preparation process conditions, high energy consumption, poor electrochemical performance, etc., and achieve simple preparation process and low energy consumption Low, time-consuming effect

Inactive Publication Date: 2015-05-06
SHANDONG YUHUANG NEW ENERGY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is aimed at positive electrode material FeF 3 There are problems of complex and harsh preparation process conditions, high energy consumption, and poor electrochemical performance. A micron-sized spherical iron fluoride positive electrode material and a preparation method thereof are provided. The micron-sized spherical iron fluoride positive electrode material (FeF 3 (H 2 O) 0.33 Cathode material) has a spherical shape and excellent electrochemical performance, the required reaction conditions are mild, low cost, and easy to industrialized production

Method used

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  • Micron-scale spheroidal ferric fluoride positive electrode material and preparation method thereof
  • Micron-scale spheroidal ferric fluoride positive electrode material and preparation method thereof
  • Micron-scale spheroidal ferric fluoride positive electrode material and preparation method thereof

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Embodiment 1

[0026]Prepare 40 mL of 0.5 mol / L ferric nitrate (Fe(NO 3 ) 3 9H 2 O) water / ethanol mixed solution (the volume ratio of water and ethanol is 1:1), and 0.02mol oleic acid is added thereto; It is 1mol / L ammonium fluoride aqueous solution that prepares 20 mL concentration by molar ratio 1:3, then The two solutions were added to 150 mL of ethanol solution with a concentration of 0.0055 mol / L polyethylene glycol (molecular weight: 20,000), and the two solutions were sonicated for 30 minutes, and then the two solutions were mixed, and stirred at a constant speed under normal temperature and pressure for 2 h. . The supernatant was discarded by centrifugation, and the precipitate was repeatedly washed with ethanol several times, and dried at 60°C for 8 hours to obtain the pure phase product FeF 3 (H 2 O) 0.33 .

Embodiment 2

[0028] Prepare 40 mL of 0.6 mol / L ferric chloride (FeCl 3 ·6H 2 0) water / ethanol solution (the volume ratio of water and ethanol is 1:1), and 0.025mol oleic acid is added thereto; It is 1mol / L ammonium bifluoride aqueous solution that prepares 24mL concentration by molar ratio 1:3, then two kinds The solutions were added to 150 mL of 0.0055 mol / L polyethylene glycol (molecular weight: 20,000) ethanol solution, and the two solutions were sonicated for 30 min, and then the two solutions were mixed and stirred at a constant speed for 4 h at normal temperature and pressure. The supernatant was discarded by centrifugation, and the precipitate was repeatedly washed with ethanol, and dried at 60°C for 12 hours to obtain the pure phase product FeF 3 (H 2 O) 0.33 .

Embodiment 3

[0030] Prepare 40 mL of 0.5 mol / L ferric nitrate (Fe(NO 3 ) 3 9H 2 O) water / ethylene glycol mixed solution (the volume ratio of water and ethylene glycol is 1:1), and 0.02mol octadecylamine is added thereto; 20 mL of concentration is prepared as 1mol / L fluorine at a molar ratio of 1:3 Ammonium chloride aqueous solution, and then the two solutions were added to 150mL ethanol solution with a concentration of 0.0055 mol / L polyethylene glycol (molecular weight: 20,000), and the two solutions were sonicated for 10 minutes, and then the two solutions were mixed. Stir at a constant speed for 2 h. The supernatant was discarded by centrifugation, and the precipitate was repeatedly washed with ethanol several times, and dried at 60°C for 8 hours to obtain the pure phase product FeF 3 (H 2 O) 0.33 .

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Abstract

The invention specifically relates to a micron-scale spheroidal ferric fluoride positive electrode material and a preparation method thereof. The micron-scale spheroidal ferric fluoride positive electrode material is prepared from a water / alcohol mixed solution of a ferric salt and a fluorine-containing aqueous solution. The preparation method is performed at a normal temperature and under a normal pressure, the preparation process is simple, the consuming time is short, the energy consumption is low, the cost is low, the environment-friendly effect is achieved, and the industrial production can be realized easily; the prepared FeF3(H2O)0.33 particles are spheroidal at the micron scale; the tap density of the material is improved; the material has excellent mobility, dispersibility and machinability, and is applicable to producing a positive electrode material slurry and coating an electrode plate; meanwhile, the material has a one-dimensional tunnel structure and is beneficial to the migration of lithium ions, so that the electrical conductivity of the material can be improved; in addition, the stability of the FeF3 structure is maintained in the charging / discharging process by use of little crystal water, and therefore, good electrochemical properties can be realized.

Description

(1) Technical field [0001] The invention relates to a lithium ion secondary battery cathode material, in particular to a micron-sized spherical iron fluoride cathode material and a preparation method thereof. (2) Background technology [0002] The demand for energy in today's society has greatly promoted the development of energy storage technology. Lithium-ion battery is a new type of energy storage device that has developed rapidly since 1990. It has the advantages of high energy density, high open circuit voltage, long cycle life, no memory effect and no environmental pollution. It is used in portable electronic devices such as mobile phones, notebook computers, and digital cameras. The product field has established an unparalleled leading advantage, and is actively developing into the fields of electric tools, electric vehicles, UPS equipment and national defense. [0003] Lithium-ion batteries are mainly composed of positive and negative electrode materials, electrolyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58C01G49/10
CPCC01G49/10H01M4/1397H01M4/58H01M4/582Y02E60/10
Inventor 乔文灿宋春华王瑛王文阁赵成龙陈欣冯涛王新鹏
Owner SHANDONG YUHUANG NEW ENERGY TECH
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