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Zinc ferrite anode material of lithium ion battery and preparation method and application thereof

A lithium-ion battery and negative electrode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of increased irreversible capacity loss, poor high-rate charge-discharge performance, and low initial efficiency, achieving excellent electrochemical performance, High charge and discharge efficiency and low cost

Active Publication Date: 2012-12-26
广东羚光新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although zinc ferrite has many advantages as a negative electrode material for lithium batteries, there are also some obvious disadvantages in the actual application process: first, low electrical conductivity, resulting in poor high-rate charge and discharge performance, and low actual specific capacity; second, the first time The efficiency is low. During the first lithium intercalation reaction, a large amount of irreversible Li 2 O species, and during the first reaction process, the electrode itself is also in contact with the electrolyte, which will react to form an SEI film layer, and the irreversible capacity loss will increase.

Method used

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  • Zinc ferrite anode material of lithium ion battery and preparation method and application thereof
  • Zinc ferrite anode material of lithium ion battery and preparation method and application thereof
  • Zinc ferrite anode material of lithium ion battery and preparation method and application thereof

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Embodiment 1

[0046] The zinc chloride of 2.18g, the iron chloride of 5.89g are mixed and dissolved in the ethylene glycol solution of 100ml respectively, wherein the molar concentration of zinc chloride is 0.16mol / L, and the molar concentration of ferric chloride is 0.32mol / L L, the molar ratio of zinc chloride to ferric chloride is 1:2, and 4.62g of ammonium acetate is added as a protective agent at the same time, and the resulting mixed solution is stirred for 1.5h. Then pour the uniformly mixed solution into a 200ml high-pressure sealed tank, heat at 180°C for 24 hours to obtain a black precipitate, centrifuge to filter out the black precipitate, wash with absolute ethanol and deionized water alternately for 5 times, and dry at 50°C for 6 hours. The final product obtained was detected by XRD pattern, and the detection results were as follows: figure 1 As shown, the three strong peaks of the spectrum are consistent with the zinc ferrite standard card JCPDS no.22-1012, indicating that the...

Embodiment 2

[0049]The zinc chloride of 2.18g, the iron chloride of 5.89g are mixed and dissolved in the ethylene glycol solution of 100ml respectively, wherein the molar concentration of zinc chloride is 0.16mol / L, and the molar concentration of ferric chloride is 0.32mol / L L, the molar ratio of zinc chloride to ferric chloride is 1:2, and 4.62g of ammonium acetate is added as a protective agent at the same time, and the resulting mixed solution is stirred for 1.5h. Then pour the uniformly mixed solution into a 200ml high-pressure sealed tank, heat at 180°C for 48 hours to obtain a black precipitate, centrifuge to filter out the black precipitate, rinse with absolute ethanol and deionized water alternately for 5 times, and dry at 50°C for 6 hours. The final product obtained was detected by XRD pattern, and the detection results were as follows: figure 2 As shown, the three strong peaks of the spectrum are consistent with the zinc ferrite standard card JCPDS no.22-1012, indicating that th...

Embodiment 3

[0052] The zinc chloride of 2.18g, the iron chloride of 5.89g are mixed and dissolved in the ethylene glycol solution of 100ml respectively, wherein the molar concentration of zinc chloride is 0.16mol / L, and the molar concentration of ferric chloride is 0.32mol / L L, the molar ratio of zinc chloride to ferric chloride is 1:2, and 4.62g of ammonium acetate is added as a protective agent at the same time, and the resulting mixed solution is stirred for 1.5h. Then pour the uniformly mixed solution into a 200ml high-pressure sealed tank, heat at 200°C for 48 hours to obtain a black precipitate, centrifuge to filter out the black precipitate, wash with absolute ethanol and deionized water alternately for 5 times, and dry at 50°C for 6 hours. The final product obtained was detected by XRD pattern, and the detection results were as follows: image 3 As shown, the three strong peaks of the spectrum are consistent with the zinc ferrite standard card JCPDS no.22-1012, and there are no di...

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Abstract

The invention provides a zinc ferrite anode material of a lithium ion battery and a preparation method and application thereof. The preparation method comprises the following steps of: after dissolving zinc salt and ferric salt into a dispersing agent to obtain dispersion solution, adding a protective agent; stirring to obtain mixed solution; and finally, conducting the mixed solution into a high pressure sealing tank, heating for 12 to 48 hours at a temperature of 170 to 200 DEG C to obtain black precipitates and washing and drying to obtain the zinc ferrite anode material of the lithium ion battery. The preparation method has simple process and is convenient to implement; and after being applied to the lithium ion battery, the zinc ferrite anode material of the lithium ion battery, which is used as the anode material, shows the advantages of excellent electrochemical performance, high first charging and discharging efficiency, high specific capacity and good cycle performance.

Description

technical field [0001] The invention belongs to the field of battery material preparation, and in particular relates to zinc ferrite, a lithium ion battery negative electrode material, and a preparation method and application thereof. Background technique [0002] Lithium-ion batteries are widely used as power sources for various portable electronic devices and electric vehicles due to their high specific energy, low self-discharge, long cycle life, light weight, and environmental protection. Electrode materials are the key factors that determine the overall performance of lithium-ion batteries. As for anode materials, the current commercial carbon anode materials are close to their theoretical limit capacity (372mAh / g), which severely limits the capacity of high-capacity lithium-ion batteries. Further development of batteries. In addition, the potential of the carbon negative electrode is very close to the potential of metal lithium, which will cause lithium deposition whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52
CPCY02E60/12Y02E60/10
Inventor 侯贤华姚玲敏胡社军
Owner 广东羚光新材料股份有限公司
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