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Preparation method of lithium ion battery anode material FeV2O4

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve problems such as poor performance, and achieve the effects of capacity decay, increased tap density, and good cycle life

Active Publication Date: 2015-04-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, FeV can be prepared by solid phase ball milling in the laboratory. 2 o 4 , but the performance is poor in all aspects

Method used

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  • Preparation method of lithium ion battery anode material FeV2O4
  • Preparation method of lithium ion battery anode material FeV2O4
  • Preparation method of lithium ion battery anode material FeV2O4

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Dissolve 0.01mol ferrous oxalate in 100mL of deionized water to make a solution with a concentration of 0.1mol / L; dissolve 0.02mol of ammonium metavanadate in 100mL of deionized water to make a solution with a concentration of 0.2mol / L solution; then at the same time, the prepared ferrous oxalate solution and ammonium metavanadate solution were added to the stirred reactor at a rate of 400mL / h under an atmosphere of high-purity nitrogen (concentration ≥ 99.99%), and the stirring speed was controlled to 300rpm. After the addition, adjust the pH to 5 with ammonia water, and continue the reaction for 2 hours to obtain a dark blue suspension; (2) Add 4 mL of ethanol to the suspension obtained in step (1), and then spray dry it at a feed rate of 800 mL / h, the drying air inlet temperature is 220°C, and the air outlet temperature is 120°C to obtain the precursor material; (3) the precursor material obtained in step (2) is under the protection of high-purity nitrogen (conce...

Embodiment 2

[0030] (1) Dissolve 0.01mol ferrous oxalate in 100mL of deionized water to make a solution with a concentration of 0.1mol / L; dissolve 0.02mol of ammonium metavanadate in 100mL of deionized water to make a solution with a concentration of 0.2mol / L solution; then at the same time, add ferrous oxalate solution and ammonium metavanadate solution to the stirred reactor at a speed of 200mL / h under the atmosphere of high-purity argon (concentration ≥ 99.99%), and control the stirring speed to 200rpm , adjust the pH to 2 with ammonia water after the addition, and continue the reaction for 1 hour to obtain a dark blue suspension; (2) Add 2 mL of ethanol to the suspension obtained in step (1), and then spray dry it at a feed rate of 400 mL / h, the drying inlet air temperature is 150°C, and the outlet air temperature is 80°C to obtain the precursor material; (3) the precursor material obtained in step (2) is protected by high-purity argon (concentration ≥ 99.99%) Heat treatment at 200°C f...

Embodiment 3

[0033] (1) Dissolve 0.01mol ferrous oxalate in 100mL of deionized water to make a solution with a concentration of 0.1mol / L; dissolve 0.02mol of ammonium metavanadate in 100mL of deionized water to make a solution with a concentration of 0.2mol / L solution; then at the same time, add ferrous oxalate solution and ammonium metavanadate solution to the stirred reactor at a speed of 600mL / h under the atmosphere of high-purity argon (concentration ≥ 99.99%), and control the stirring speed to 400rpm , after the addition, adjust the pH to 6 with ammonia water, and continue the reaction for 4 hours to obtain a dark blue suspension; (2) Add 6 mL of ethanol to the suspension obtained in step (1), and then spray dry it at a feed rate of 1200 mL / h, the drying inlet air temperature is 250°C, and the outlet air temperature is 150°C to obtain the precursor material; (3) the precursor material obtained in step (2) is protected by high-purity argon (concentration ≥ 99.99%) Heat treatment at 400...

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Abstract

The invention discloses a preparation method of lithium ion battery anode material FeV2O4. The preparation method comprises the following steps: (1) adding ferrous oxalate solution and ammonium metavanadate solution in a stirring reaction kettle simultaneously under a protective atmosphere according to the ratio of 1: 2 of a ferrous ion concentration to a vanadium ion concentration, stirring, reacting, adjusting the pH value to 2-6, and further reacting for 1-4h to obtain a dark blue turbid liquid; (2) adding the turbid liquid obtained in the step (1) in ethyl alcohol with volume equivalent to 1-3% of the volume of the turbid liquid, and then carrying out spray-drying to obtain a precursor material; and (3) carrying out heat treatment on the precursor material obtained in the step (2) for 8-15h at 200-400 DEG C under the protective atmosphere, and then adding liquid nitrogen and quenching to obtain the lithium ion battery anode material FeV2O4. The method disclosed by the invention is low in heat treatment temperature; the prepared FeV2O4 anode material particles are of a microspherical structure, high in tap density, high in charge-discharge characteristics and long in cycle life.

Description

technical field [0001] The present invention relates to a preparation method of lithium ion battery negative electrode material, in particular to a lithium ion battery negative electrode material FeV 2 o 4 method of preparation. Background technique [0002] At present, in the commercial production of batteries, the negative electrode of the battery is mainly made of graphite, but whether it is natural graphite or artificial graphite, its theoretical specific capacity is only 372mAh / g. Although graphite negative electrode has the advantages of low cost and good safety, with the development of some high specific capacity positive electrode materials, graphite with lower specific capacity as negative electrode can no longer meet the requirements of matching positive electrode materials. [0003] New negative electrode materials emerge in endlessly, such as lithium titanate, amorphous carbon, silicon-carbon composite materials, tin-based alloys, metal alloys, graphene, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48C01G49/00
CPCH01M4/1391H01M4/523H01M10/0525Y02E60/10
Inventor 张佳峰张宝李晖袁新波王小玮郑俊超
Owner CENT SOUTH UNIV
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