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A preparation liyo 2 battery material method

A technology for battery materials and raw materials, applied in the preparation/processing of rare earth metal compounds, battery electrodes, secondary batteries, etc., can solve problems such as no research reports on battery materials, and achieve low investment in production equipment, stable cycle performance, and preparation. The effect of simple process

Active Publication Date: 2017-04-19
河北零点新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, there is no research report on its preparation and use as a battery material

Method used

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  • A preparation liyo <sub>2</sub> battery material method
  • A preparation liyo <sub>2</sub> battery material method
  • A preparation liyo <sub>2</sub> battery material method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 0.350g LiAc2H 2 O, 0.323g Y 2 o 3 Dissolve in a mixed solvent composed of 20mL deionized water and 30mL ethanol, and stir for 1h. The mixed product was placed in a blast drying oven and dried at 150°C. The precursor was obtained by drying for 3 hours. After the precursor was fully ground in an agate mortar, it was pressed into tablets in a tablet machine, and calcined in a muffle furnace at a constant temperature of 800°C for 10 hours, and then naturally dropped to room temperature. The product was ground to obtain LiYO 2 powder. figure 1 It is the X-ray diffraction spectrum figure of this product, as can be seen from the figure, the diffraction peak intensity is higher, illustrates that the crystallinity of this product is better, and this spectrum figure can be compared with LiYO 2 standard card (00-024-0671), indicating that the product is LiYO 2 . figure 2 It is an electron microscope (SEM) photo of the product. It can be seen that the product is comp...

Embodiment 2

[0030] Weigh 0.200g Li 2 CO 3 , 0.510gY 2 o 3 Dissolve in a mixture of 30mL deionized water and 40mL ethanol

[0031] Mixing solvent, stirred for 1.5h. The mixture was placed in a blast drying oven and dried at 80 °C. The precursor was obtained after drying for 5 hours. After the precursor was fully ground in an agate mortar, it was pressed in a tablet machine, calcined in a muffle furnace at a constant temperature of 500 °C for 7 h, and then naturally dropped to room temperature. The product was ground to obtain LiYO 2 powder. The resulting LiYO 2 The first discharge specific capacity of the material within 2.3-0.01V reaches 35.90 mAhg -1 . at 50 mAg -1 Charge and discharge under the current density, the battery capacity has no obvious decay after 20 cycles.

Embodiment 3

[0033] Weigh 0.400g LiAc2H 2 O, 0.570gY 2 o 3 Dissolve in a mixed solvent composed of 35mL deionized water and 45mL ethanol, and stir for 1.2 h. The mixed product was placed in a blast drying oven and dried at 90°C. After drying for 5.5 hours, the precursor was obtained. After the precursor was fully ground in an agate mortar, it was pressed into tablets in a tablet machine, and calcined in a muffle furnace at a constant temperature of 650°C for 9 hours, and then naturally dropped to room temperature. LiYO was obtained by grinding 2 powder. The first discharge specific capacity of this material in 2.3-0.01V is 37.80 mAhg -1 . at 60mAg -1 The capacity has no obvious decay after charging and discharging for 30 times under the current density.

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Abstract

The invention discloses a method for preparing a LiYO2 battery material. The method comprises the following steps: mixing a lithium source and a yttrium source in a solvent prepared by mixing double-distilled water and ethyl alcohol according to a certain mole ratio so as to obtain a mixture; stoving the mixture in a stove so as to obtain a product; performing high-temperature calcination on the obtained product within a certain temperature range; and cooling to the room temperature; and grinding so as to obtain the LiYO2 powder battery material. The method is easy and feasible, no gas polluting the environment is generated, and the prepared LiYO2 material has the certain charging and discharging function and the stable cycle performance, is a lithium ion battery material having the wide application prospect, and has the potential business value.

Description

technical field [0001] The present invention relates to a kind of preparation method of battery electrode material, especially a kind of preparation LiYO 2 A battery material method belongs to the technical field of energy materials. Background technique [0002] Lithium-ion batteries are currently known as the most promising energy devices for electric vehicles due to their high energy density and long service life. and high safety performance requirements. In recent years, there have been many reports on lithium titanate and metal oxides such as iron oxide and tin oxide as anode materials for lithium ion batteries. The study found that the discharge platform of lithium titanate is higher (1.5V vs. Li + / Li), and the capacity is limited, while metal oxides generally have the disadvantages of rapid capacity decay during cycling. Therefore, the development of new negative electrode materials is still one of the important research contents in the field of lithium-ion batte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58C01F17/00
CPCC01F17/10H01M4/5825H01M10/0525Y02E60/10
Inventor 丁克强赵永波赵棉李媛赵婧陈昱萦王庆飞
Owner 河北零点新能源科技有限公司
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