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Ferric fluoride nano material and preparation method thereof

A nanomaterial, iron trifluoride technology, applied in the direction of iron halide, nanotechnology, electrical components, etc., can solve the problems of high consumables, large FeF3 particle size, etc., to achieve high yield, high practical application value, high crystallinity Effect

Active Publication Date: 2012-12-19
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods also have high consumption materials in the reaction process, and the obtained FeF 3 Disadvantages such as large particle size and the need for toxic fluorine sources

Method used

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  • Ferric fluoride nano material and preparation method thereof
  • Ferric fluoride nano material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1 3

[0020] The preparation method of embodiment 1 iron trifluoride nanometer material

[0021] Include the following steps:

[0022] (1) 0.1263g Fe(NO 3 ) 3 9H 2 O was dissolved in 30mL of absolute ethanol to obtain a clear alcoholic solution containing iron, in which the concentration of iron ions was 10.4mM;

[0023] (2) Under stirring conditions, 0.0267g NH 4 HF 2 Add in the above-mentioned iron-containing alcohol solution until the system becomes a colorless and transparent solution, and the solution is transferred to a polytetrafluoroethylene reactor with a volume of 50mL; the Fe(NO 3 ) 3 9H 2 O and NH 4 HF 2 The molar ratio is 1:1.5 (the molar ratio of iron ion to fluoride ion is 1:3);

[0024] (3) Heat-treat the hydrothermal reactor at 80°C for 4 hours, cool naturally, centrifuge, wash with ethanol three times, and vacuum dry at 60°C for 10 hours to obtain FeF 3 0.33H 2 O nanomaterials.

[0025] To the FeF that embodiment 1 prepares gained 3 0.33H 2 O nanomater...

Embodiment 2 3

[0027] The preparation method of embodiment 2 iron trifluoride nanometer material

[0028] Preparation method is the same as embodiment 1, just Fe(NO 3 ) 3 9H 2 The consumption of O becomes 0.606g (in the alcohol solution containing iron, the concentration of iron ion is 50mM), the NH 4 HF 2 The dosage becomes 0.1485g(Fe(NO 3 ) 3 9H 2 O and NH 4 HF 2 The molar ratio of the iron ion to the fluorine ion is 1:1.5, and the molar ratio of the iron ion to the fluoride ion is 1:3), and the XRD spectrum shows that FeF 3 0.33H 2 O nanomaterials. The particle size is about 10-15 nanometers, and the specific discharge capacity of the material is 130mAh / g.

Embodiment 3 3

[0029] The preparation method of embodiment 3 iron trifluoride nanometer material

[0030] Preparation method is the same as embodiment 1, just Fe(NO 3 ) 3 9H 2 The consumption of O becomes 1.212g (in the alcohol solution containing iron, the concentration of iron ion is 0.1M), the NH 4 HF 2 The dosage becomes 0.297g(Fe(NO 3 ) 3 9H 2 O and NH 4 HF 2 The molar ratio of the iron ion to the fluorine ion is 1:1.5, and the molar ratio of the iron ion to the fluoride ion is 1:3), and the XRD spectrum shows that FeF 3 0.33H 2 O nanomaterials. The particle size is about 10-15 nanometers, and the discharge specific capacity of the material is 122mAh / g.

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Abstract

The invention discloses a ferric fluoride nano material and a preparation method thereof. The preparation method comprises the following steps of: dissolving inorganic ferric salt in an alcohol solvent to obtain alcohol solution containing iron; dispersing an inorganic fluorine source into the alcohol solution containing iron and adding the solution into a hydrothermal reaction kettle; carrying out the hydrothermal reaction kettle solution for 1 hour to 7 days at a temperature of 40 to 140 DEG C, naturally cooling, carrying out centrifugal separation, washing by ethanol and carrying out vacuum drying to obtain the ferric fluoride nano material. According to the preparation method of ferric fluoride, a volatile hydrofluoric acid fluorine source does not need to be used as a raw material, low-toxicity fluoride is used as the fluorine source, common ferric salt is used as a ferric source, the FeF3.0.33H2O nano material containing trace moisture is obtained by the simple solvent heat treatment, the preparation process is simple, the yield is high and the obtained material has high crystallinity. The method disclosed by the invention is a novel and practical process route for preparing the ferric fluoride nano material and has high actual application value.

Description

technical field [0001] The invention belongs to the field of electrode materials, in particular, the invention relates to a ferric trifluoride nanometer material and a preparation method thereof. Background technique [0002] The existing lithium-ion secondary batteries cannot meet the high energy density requirements of electric vehicles, etc., and the specific capacity of the electrode material directly affects the energy density of the battery. The first task of the battery. A new type of reversible chemical conversion mechanism cathode material - transition metal fluoride, has attracted extensive attention from researchers because it can provide higher output voltage and theoretical specific capacity. [0003] Since the 1970s, there have been a lot of research work on the use of fluorides as cathode materials for lithium-ion secondary batteries. The earliest report was in 1970, NiF was synthesized by Seiger et al. 2 , and realized the limited reversible cycle of mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/10H01M4/58B82Y40/00
CPCY02E60/12Y02E60/10
Inventor 魏增福苏伟刘世念陈刚
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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