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Square beta-FeF3.3H2O cathode material and preparation method thereof

A -fef3·3h2o, cathode material technology, which is applied in the field of new energy material preparation, can solve the problems of complex and harsh preparation process conditions, poor electrochemical performance, and high energy consumption, and achieves simple preparation process, short time consumption, and low energy consumption. Effect

Active Publication Date: 2015-04-29
SHANDONG YUHUANG NEW ENERGY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is for hexagonal FeF 3 There are problems of complex and harsh preparation process conditions, high energy consumption, and poor electrochemical performance. To provide a tetragonal β-FeF with a square shape and excellent electrochemical performance 3 ·3H 2 O positive electrode material and its required reaction conditions are mild, low cost, and a preparation method that is easy to industrialize

Method used

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  • Square beta-FeF3.3H2O cathode material and preparation method thereof
  • Square beta-FeF3.3H2O cathode material and preparation method thereof
  • Square beta-FeF3.3H2O cathode material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] Prepare 150 mL of 0.5 mol / L ferric nitrate (Fe(NO 3 ) 3 9H 2 O) ethanol solution, and 0.02mol oleic acid was added therein, stirred, ultrasonic 0.5 h; According to molar ratio 1:3, slowly add the ethanol solution that concentration is 1mol / L ammonium fluoride, then mix solution under normal temperature and pressure Stir at a constant speed for 4 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 β-FeF 3 ·3H 2 O.

Embodiment 2

[0026] Prepare 150 mL of 0.3 mol / L ferric chloride (FeCl 3 ·6H 2 (2) ethanolic solution, and 0.01mol dodecyltrimethylammonium chloride is added therein, stirred, ultrasonic 0.5 h; Slowly add the ethanolic solution that concentration is 1mol / L ammonium fluoride according to molar ratio 1:3, then The mixed solution was stirred at a constant speed for 2 h at room temperature and pressure. The supernatant was discarded by centrifugation, and the precipitate was repeatedly washed with ethanol several times, and dried at 60 °C for 8 h to obtain the pure phase product β-FeF 3 ·3H 2 O.

Embodiment 3

[0028] Prepare 150 mL of 0.5 mol / L ferric nitrate (Fe(NO 3 ) 3 9H 2 O) ethylene glycol solution, and 0.02mol dodecyltrimethylammonium chloride is added thereto, stirred, ultrasonic 0.5 h; According to molar ratio 1:3, slowly add the ethylene glycol solution that concentration is 1mol / L ammonium fluoride Alcohol solution, and then the mixed solution was stirred at a constant speed at room temperature and pressure for 4 h. The supernatant was discarded by centrifugation, and the precipitate was repeatedly washed with ethanol several times, and dried at 60 °C for 12 h to obtain the pure phase product β-FeF 3 ·3H 2 O.

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Abstract

The invention particularly relates to a square beta-FeF3.3H2O cathode material and a preparation method thereof. The cathode material is prepared from an iron salt-containing alcohol solution and a fluorine-containing alcohol solution. The preparation method is carried out under the condition of normal temperature and normal pressure and is simple in preparation process, short in preparation time, low in energy consumption, low in cost, environment-friendly and easy for industrialized production; the prepared square beta-FeF3.3H2O particles are relatively high in specific discharge capacity, low in cost, environment-friendly and excellent in rate performance and cyclic stability, and has an actual application prospect in the fields of power batteries and battery energy storage.

Description

(1) Technical field [0001] The invention belongs to the technical field of preparation of new energy materials, in particular to a square-shaped β-FeF 3 ·3H 2 O cathode material and its preparation method. (2) Background technology [0002] In order to gradually solve the energy shortage and air pollution problems that restrict the current economic development, lithium-ion batteries have been widely used in technology, production, and markets in recent years because of their advantages such as high working voltage, high energy density, long cycle life, less pollution, and no memory effect. achieved rapid development. The key electrode material of lithium-ion battery is the final decisive factor of battery performance, among which the positive electrode material has the greatest impact on battery performance, and its cost accounts for about 40% of the entire battery cost. Therefore, the development of high-performance and cheap cathode materials is of great significance to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58
CPCH01M4/136H01M4/1397H01M4/582Y02E60/10
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