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Application of polyacrylic acid in preparation of lithium ion battery anode material nano-sized iron oxide/carbon composite material

A nano-iron oxide, lithium-ion battery technology, applied in battery electrodes, nanotechnology, circuits, etc., can solve problems such as difficult industrial production, and achieve the effects of short reaction cycle, low energy consumption, and good appearance

Inactive Publication Date: 2012-12-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these two methods are difficult to use in industrial production

Method used

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  • Application of polyacrylic acid in preparation of lithium ion battery anode material nano-sized iron oxide/carbon composite material
  • Application of polyacrylic acid in preparation of lithium ion battery anode material nano-sized iron oxide/carbon composite material
  • Application of polyacrylic acid in preparation of lithium ion battery anode material nano-sized iron oxide/carbon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The iron source is 5 grams of chemically pure iron powder, which is dissolved in a mixed solution of deionized water and polyacrylic acid (the content of polyacrylic acid is 10% by mass, the same as in the following examples), and the mass ratio of iron to polyacrylic acid is 1:8 , stir in a water bath at 60°C for 2 hours to dissolve the iron-containing solution, place the iron-containing solution in a constant temperature oscillator to evaporate, the temperature of the water bath is 80°C, and obtain a gel after evaporation for 6 hours; put the gel in a muffle Pre-calcine in the furnace at 300°C for 3 hours, take it out and grind it, and then calcinate it in the air atmosphere of the muffle furnace at 450°C for 5 hours to obtain nano-Fe as the negative electrode material for lithium-ion batteries. 2 o 3 / C Composite.

Embodiment 2

[0034] The iron source is 10 grams of chemically pure ferric nitrate, which is dissolved in a mixed solution of deionized water and polyacrylic acid (the content of polyacrylic acid is 5%), and the mass ratio of iron to polyacrylic acid is 1:2. Stir for 20 minutes to dissolve the iron-containing solution, place the iron-containing solution in a constant temperature oscillator to evaporate, the temperature of the water bath is 90°C, and evaporate for 5 hours to obtain a gel; pre-calcine the gel with a muffle furnace at 400°C for 3 hours , taken out and ground, and then calcined at 500 ° C for 6 hours in a tube furnace oxygen atmosphere to obtain nano-Fe as the negative electrode material for lithium-ion batteries 2 o 3 / C Composite.

Embodiment 3

[0036] The iron source is 5 grams of chemically pure iron powder, which is dissolved in a mixed solution of deionized water and polyacrylic acid (the content of polyacrylic acid is 10%), and the mass ratio of iron to polyacrylic acid is 1:7. Stirring for 3 hours to dissolve the iron-containing solution, place the iron-containing solution in a constant temperature oscillator to evaporate, the temperature of the water bath is 90°C, and obtain a gel after evaporating for 4 hours; pre-calcine the gel with a muffle furnace at 400°C for 3 hour, take it out and grind it, and then calcinate it at 500°C for 5 hours under the argon atmosphere of the tube furnace to obtain nano-Fe 3 o 4 / C Composite.

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Abstract

The invention discloses an application of polyacrylic acid in the preparation of a lithium ion battery anode material, namely a nano-sized iron oxide / carbon composite material, comprising the following steps of: adding an iron source into a mixed solution of deionized water and polyacrylic acid for stirred reaction so as to obtain a clear iron-containing solution; evaporating the iron-containing solution until it is gel-like, and carrying out precalcination at the temperature of 200-400 DEG C to obtain a precursor; and calcining the obtained precursor at the temperature of 400-800 DEG C to obtain the nano-sized iron oxide / carbon composite material. The preparation method of the nano-sized iron oxide / carbon composite material provided by the invention has characteristics of wide raw material range, simple process flow, little energy consumption and low cost. The obtained product has good particle morphology and excellent electrochemical performance.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of negative electrode materials of lithium ion batteries, and in particular relates to an application method of polyacrylic acid in the preparation of negative electrode materials of lithium ion batteries. technical background: [0002] Lithium-ion batteries are a new generation of green and environmentally friendly batteries that were put on the market after the 1990s. They are widely used in portable appliances because of their advantages such as high working voltage, high specific energy, long cycle life, low self-discharge power, no memory effect, and no pollution. and electric vehicles. The anode material of lithium ion battery is one of the key factors restricting its overall performance. The negative electrode materials used in the earliest commercialized lithium-ion batteries are almost all carbon / graphite materials, but because the electrode potential of carbon is very close to that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52H01M4/36B82Y40/00
CPCY02E60/12Y02E60/10
Inventor 王志兴吴飞翔郭华军肖玮李新海吴秀锋范玉磊赵前进颜志梁彭文杰胡启阳张云河
Owner CENT SOUTH UNIV
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