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Preparation method and application of nanometer vanadium pentoxide anode material suitable for industrial production

A technology of vanadium pentoxide and positive electrode materials, which is applied in the field of nanomaterials and electrochemistry, can solve the problems of limiting the application of vanadium pentoxide, low production efficiency, unfavorable industrialization, etc., and achieve easy scale-up production, low cost, and feasibility strong effect

Active Publication Date: 2017-05-31
周双双
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, V with excellent performance is currently prepared 2 o 5 Most of the positive electrode materials use methods such as hydrothermal method, precipitation method, sol method, etc., which have disadvantages such as low production efficiency, complicated process, and unfavorable industrialization, which limits the application of vanadium pentoxide in lithium batteries.

Method used

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  • Preparation method and application of nanometer vanadium pentoxide anode material suitable for industrial production
  • Preparation method and application of nanometer vanadium pentoxide anode material suitable for industrial production
  • Preparation method and application of nanometer vanadium pentoxide anode material suitable for industrial production

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Embodiment 1

[0028] Example 1, see Figure 1 to Figure 5 :

[0029] The present invention provides a kind of preparation method of nano-vanadium pentoxide cathode material suitable for industrialized production, comprising the following steps (see attached figure 1 ):

[0030] 1) Put 16.368Kg V 2 o 5 , 68.1Kg dihydrate oxalic acid was added to deionized water to form a blue solution;

[0031] 2) Add 15Kg of PVA and 5L of EG (with a density of 1.1155g / mL) into the blue solution respectively to obtain a blue precursor solution;

[0032] 3) Pump the blue precursor solution into a centrifugal spray dryer for spray drying to obtain a blue precursor powder;

[0033] 4) Sinter the blue precursor powder at 500°C for 3 hours under aerobic conditions, and sieve to obtain the product.

[0034] The structure of the present embodiment product is measured by X-ray diffractometer, and the results are shown in the attached figure 2 , X-ray diffraction pattern (XRD) shows that the nanopowder struct...

Embodiment 2

[0040] The invention provides a method for preparing a nano vanadium pentoxide cathode material suitable for industrial production, comprising the following steps:

[0041] 1) 21.055Kg NH 4 VO 3 , 68.1Kg dihydrate oxalic acid was added to deionized water to form a blue solution;

[0042] 2) Add 12Kg PEG-4000 and 2L EG (with a density of 1.1155g / mL) to the blue solution respectively to obtain a blue precursor solution;

[0043] 3) Pump the blue precursor solution into a centrifugal spray dryer for spray drying to obtain a blue precursor powder;

[0044]4) Sinter the blue precursor powder at 350°C for 8 hours under aerobic conditions, and sieve to obtain the product.

[0045] The product nanometer V of present embodiment gained 2 o 5 As a positive electrode active material for lithium ions, its specific capacity can reach 126.7mAh / g at 2.5-4V (1C=150mAh / g) and 0.5C. After 200 cycles, its specific capacity still reaches 116.7mAh / g. The rate is 92.1%.

Embodiment 3

[0047] The invention provides a method for preparing a nano vanadium pentoxide cathode material suitable for industrial production, comprising the following steps:

[0048] 1) Put 16.368Kg V 2 o 5 136.2Kg oxalic acid dihydrate was added to deionized water to form a blue solution;

[0049] 2) Add 15Kg of glucose and 2L of EG (with a density of 1.1155g / mL) into the blue solution respectively to obtain a blue precursor solution;

[0050] 3) Pump the blue precursor solution into a centrifugal spray dryer for spray drying to obtain a blue precursor powder;

[0051] 4) Sinter the blue precursor powder at 550°C for 8 hours under aerobic conditions, and sieve to obtain the product.

[0052] The product nanometer V of present embodiment gained 2 o 5 As a positive electrode active material for lithium ions, its specific capacity can reach 125.7mAh / g at 2.5-4V (1C=150mAh / g) and 0.5C, and its specific capacity can still reach 114.2mAh / g after 200 cycles. The rate is 90.8%.

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Abstract

The invention provides a preparation method and an application of a nanometer vanadium pentoxide anode material suitable for industrial production. The preparation method comprises the following steps: adding a vanadium source and oxalic acid into deionized water to form a blue solution; respectively adding an additive and ethylene glycol into the blue solution to obtain a blue precursor solution; spray-drying the blue precursor solution to obtain a blue precursor powder; conducting aerobic sintering on the blue precursor powder, and screening to obtain a product. The liquid phase spray drying technique is adopted, the product particle is on the nanometer scale, the distribution of the product particle is even, the product has an excellent electrochemical performance, the source of the raw materials is wide, the preparation process is simple, the cost is low, the industrialization of the product is easy, and the product can serve as an anode active material for a lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of nanomaterials and electrochemistry, in particular to a nano vanadium pentoxide (V 2 o 5 ) The preparation method of positive electrode material. Background technique [0002] Lithium-ion batteries have the advantages of high specific energy, long life, green and low carbon, and are gradually being widely used in electric vehicles and consumer electronics markets. However, due to poor rate performance and power density, it is limited in large-scale applications such as electric vehicles. applications in energy storage. In the "National Plan for Energy Conservation and New Energy Vehicles", it is pointed out that by 2020, the energy density of power batteries should reach 300Wh / Kg. a goal. However, the current lithium iron phosphate materials and ternary materials cannot meet this demand for the time being, and it is necessary to develop new cathode materials to meet this goal. In the cathode material,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02H01M4/48H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G31/02H01M4/483H01M10/0525Y02E60/10
Inventor 皮玉强葛曜闻
Owner 周双双
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