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Hollow nano cubic NiCo2O4 dual-metal oxide material and preparation method thereof

A bimetallic oxide, nanocube technology, applied in chemical instruments and methods, cobalt compounds, nanotechnology, etc., can solve the problems of large particle size of products and poor cycle performance of lithium-ion battery anode materials, and achieve high specific capacity, The effect of high yield and simple process

Inactive Publication Date: 2014-07-16
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the preparation process, NiCo 2 o 4 The synthesis method of double metal oxide anode materials mainly involves ball milling and heat treatment, the product particle size is large, and the cycle performance as a lithium ion battery anode material is poor

Method used

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  • Hollow nano cubic NiCo2O4 dual-metal oxide material and preparation method thereof
  • Hollow nano cubic NiCo2O4 dual-metal oxide material and preparation method thereof
  • Hollow nano cubic NiCo2O4 dual-metal oxide material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] NiCl 2 ·6H 2 O (purity >99.9%), CoCl 2 ·6H 2 O (purity >99.9%) and Na 2 S 2 o 3 (purity >99.9%), PVP K30 (purity >99%) and ethanol (purity >99%) as initial raw materials, the raw material NiCl 2 ·6H 2 O, CoCl 2 ·6H 2 O and Na 2 S 2 o 3 High-purity water was used as solvent to prepare 0.02 mM, 0.04 mM and 1 M solutions respectively. Dissolve 1.65 g of PVP in a mixed solution of high-purity water and ethanol at a volume ratio of 1:1, and then add homemade 10 mg Cu 2 Add the O powder template into the mixed solution and stir well. At a reaction temperature of 60 °C, 2 mL of NiCl 2 ·6H 2 O, 2 mL CoCl 2 ·6H 2 O aqueous solution was added to the Cu 2 Stir well in the mixed solution of O template, add 4 mL Na 2 S 2 o 3 aqueous solution, the reaction was carried out for 5 min. The obtained turbid solution was centrifuged, washed several times with high-purity water, and dried at room temperature. The obtained product was calcined at 450 °C for 4 h under A...

Embodiment 2

[0036] NiCl 2 ·6H 2 O (purity >99.9%), CoCl 2 ·6H 2 O (purity >99.9%) and Na 2 S 2 o 3 (purity >99.9%), PVP K 30 (purity >99%) and ethanol (purity >99%) as starting materials, the raw materials NiCl 2 ·6H 2 O, CoCl 2 ·6H 2 O and Na 2 S 2 o 3 High-purity water was used as solvent to prepare 0.02 mM, 0.04 mM and 1 M solutions respectively. Dissolve 1.65 g of PVP in a mixed solution of high-purity water and ethanol at a volume ratio of 1:1, and then add homemade 10 mg Cu 2 Add the O powder template into the mixed solution and stir well. At a reaction temperature of 60 °C, 2 mL of NiCl 2 ·6H 2 O, 2 mL CoCl 2 ·6H 2 O aqueous solution was added to the Cu 2 Stir well in the mixed solution of O template, add 4 mL Na 2 S 2 o 3 aqueous solution, and the reaction was carried out for 10 min. The obtained turbid solution was centrifuged, washed several times with high-purity water, and dried at room temperature. The obtained product was calcined at 450 °C for 4 h und...

Embodiment 3

[0039] NiCl 2 ·6H 2 O (purity >99.9%), CoCl 2 ·6H 2 O (purity >99.9%) and Na 2 S 2 o 3 (purity >99.9%), PVP K 30 (purity >99%) and ethanol (purity >99%) as starting materials, the raw materials NiCl 2 ·6H 2 O, CoCl 2 ·6H 2 O and Na 2 S 2 o 3 High-purity water was used as solvent to prepare 0.02 mM, 0.04 mM and 1 M solutions respectively. Dissolve 1.65 g of PVP in a mixed solution of high-purity water and ethanol at a volume ratio of 1:1, and then add homemade 10 mg Cu 2 Add the O powder template into the mixed solution and stir well. At a reaction temperature of 60 °C, 2 mL of NiCl 2 ·6H 2 O, 2 mL CoCl 2 ·6H 2 O aqueous solution was added to the Cu 2 Stir well in the mixed solution of O template, add 4 mL Na 2 S 2 o 3 aqueous solution, and the reaction was carried out for 15 min. The obtained turbid solution was centrifuged, washed several times with high-purity water, and dried at room temperature. The obtained product was calcined at 450 °C for 4 h und...

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Abstract

The invention discloses a hollow nano cubic NiCo2O4 dual-metal oxide material and a preparation method thereof, and belongs to a metallurgical powder material and preparation thereof. The material disclosed by the invention is in the structure of a hollow nano cross cube of which the diameter is 500nm, the highest reversible capacity is 1160mAh / g, the capacity is greater than or equal to 1060mAh / g after circulating 100 times, the specific capacity is kept at 84%, and the performance is stable. According to the preparation method, a polyvinyl pyrrolidone (PVP) solution dissolved into high-purity water and ethanol is taken as a solvent, NiC12.6H2O and CoC12.6H2O are taken as metal sources, and S2O3<2+> and a home-made Cu2O nano cubic template from selective erosion are utilized at proper temperature, thereby finally generating the NiCo2O4 dual-metal oxide with the hollow nano cubic structure. The hollow nano cubic NiCo2O4 dual-metal oxide material is simple in preparation technology, and low in cost, and has industrial prospect.

Description

technical field [0001] The invention belongs to a metallurgical powder and a preparation method, in particular to a bimetallic transition metal oxide material and a method for a negative electrode of a lithium ion battery. Background technique [0002] Energy-saving and environmentally friendly electric vehicles and hybrid electric vehicles are the development direction of the automobile industry. At present, commercial graphite anode materials cannot meet the needs of high-capacity and high-safety lithium-ion batteries. The important research direction of industry and academia lies in the development of high specific capacity and cycle performance. Stable, high charge-discharge rate, low cost, and reliable safety performance of a new lithium-ion battery anode material. In 2000, J.M. Tarascon group found that nano-transition metal oxides Ni, Co, Mo, Cu, etc. have a high mass specific capacity of 700-900mAhg -1 And better rate performance, much higher than the current commer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525C01G53/04B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G51/00C01G53/04H01M4/523H01M10/0525Y02E60/10
Inventor 郭洪刘丽香王亚朋杨项军王世雄陈景
Owner YUNNAN UNIV
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