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A nickel-phosphorus-oxygen micron-spherical lithium-ion battery negative electrode material and its preparation method and the prepared lithium-ion battery negative electrode

A technology for lithium ion batteries and negative electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low tap density and unfavorable performance of nanomaterials, and achieve the effects of low price, high yield and high thermal stability

Inactive Publication Date: 2020-06-12
ZOTYE INT AUTOMOBILE TRADING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material shows good electrochemical performance, but the tap density of the nanomaterial is low, which is not conducive to its performance.

Method used

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  • A nickel-phosphorus-oxygen micron-spherical lithium-ion battery negative electrode material and its preparation method and the prepared lithium-ion battery negative electrode
  • A nickel-phosphorus-oxygen micron-spherical lithium-ion battery negative electrode material and its preparation method and the prepared lithium-ion battery negative electrode
  • A nickel-phosphorus-oxygen micron-spherical lithium-ion battery negative electrode material and its preparation method and the prepared lithium-ion battery negative electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of nickel phosphorus oxygen micron spherical lithium ion battery negative electrode material, comprising the following steps:

[0040] (1) Add 50g of choline chloride and 43.2g of urea into a 50ml three-necked flask, and stir at 80°C for 1 hour to obtain a deep eutectic solvent;

[0041] (2) Add 22g of dodecyltrimethylammonium bromide, ultrasonically dissolve, then add 0.47g of nickel chloride hexahydrate and 1.06g of sodium dihydrogen phosphate, and ultrasonically dissolve it for 1 hour to obtain a reaction precursor solution;

[0042] (3) Reflux the reaction precursor solution at 150°C for 3 hours. When the color changes from light green to black, stop the reflux, cool to room temperature, separate the precipitate by high-speed centrifugation, and wash it three times with deionized water and ethanol alternately, and finally , put the precipitate in a drying oven at 60° C., and dry it for 6 hours to obtain a black solid powder, which is the negativ...

Embodiment 2

[0051] A preparation method of nickel phosphorus oxygen micron spherical lithium ion battery negative electrode material, comprising the following steps:

[0052] (1) Add 50g of choline chloride and 43.2g of urea into a 50ml three-necked flask, and stir at 100°C for 1 hour to obtain a deep eutectic solvent;

[0053] (2) Add 22g of dodecyltrimethylammonium bromide, ultrasonically dissolve, then add 0.47g of nickel chloride hexahydrate and 0.53g of sodium dihydrogen phosphate, and ultrasonically dissolve it for 0.5 hours to obtain a reaction precursor solution;

[0054] (3) Reflux the reaction precursor solution at 120°C for 3 hours. When the color changes from light green to black, stop the reflux, cool to room temperature, separate the precipitate by high-speed centrifugation, and wash it three times with deionized water and ethanol alternately; finally , put the precipitate in a drying oven at 60°C, and dry it for 3 hours to obtain a black solid powder, which is the negative ...

Embodiment 3

[0063] A preparation method of nickel phosphorus oxygen micron spherical lithium ion battery negative electrode material, comprising the following steps:

[0064] (1) Add 50g of choline chloride and 21.6g of urea into a 50ml three-necked flask, and stir at 80°C for 1 hour to obtain a deep eutectic solvent;

[0065] (2) Add 11g of dodecyltrimethylammonium bromide, ultrasonically dissolve, then add 0.69g of nickel chloride hexahydrate and 1.06g of sodium dihydrogen phosphate, and ultrasonically dissolve it for 1 hour to obtain a reaction precursor solution;

[0066] (3) Reflux the reaction precursor solution at 100°C for 1.5 hours. When the color changes from light green to black, stop the reflux, cool to room temperature, separate the precipitate by high-speed centrifugation, and wash it three times with deionized water and ethanol alternately. Put the precipitate in a drying oven at 60°C and dry it for 6 hours to obtain a black solid powder, which is the negative electrode mat...

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Abstract

The invention discloses a nickel-phosphorus-oxygen micron spherical negative electrode material for a lithium-ion battery, a preparation method of the nickel-phosphorus-oxygen micron spherical negative electrode material and a negative electrode of the lithium-ion battery prepared from the nickel-phosphorus-oxygen micron spherical negative electrode material. The preparation method comprises the following steps of mixing choline chloride and urea, and heating and stirring a mixture to obtain a deep-eutectic solvent; adding a cationic surfactant, carrying out ultrasonic dissolving, sequentiallyadding nickel chloride hexahydrate and sodium dihydrogen phosphate and carrying out ultrasonic dissolving to obtain a reaction precursor solution; and heating and refluxing the reaction precursor solution, cleaning and drying to obtain the nickel-phosphorus-oxygen micron spherical negative electrode material for the lithium-ion battery, wherein main components of the nickel-phosphorus-oxygen micron spherical negative electrode material are Ni, Ni3P and NiO, and a large-size microsphere material of which the particle sizes are 0.2-0.5micron is formed by self-assembling of particles in the preparation process. The nickel-phosphorus-oxygen micron spherical negative electrode material for the lithium-ion battery has excellent electrochemical properties.

Description

technical field [0001] The invention relates to the field of lithium-ion battery cell materials, in particular to a nickel-phosphorus-oxygen micron spherical lithium-ion battery negative electrode material, a preparation method and the prepared lithium-ion battery negative electrode. Background technique [0002] With the rapid development of power lithium-ion batteries, power lithium-ion battery anode materials have received extensive attention. The negative electrode materials used in traditional lithium-ion power batteries have low capacity, poor cycle performance and rate performance, and there are safety problems. [0003] Carbon materials such as graphite, hard carbon, and soft carbon are the main anode materials for commercial lithium-ion batteries. However, the lithium storage performance of these carbon materials is poor, resulting in a low charge and discharge capacity, which limits the performance of lithium-ion power batteries to a large extent. Transition meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1391H01M4/525
CPCY02E60/10
Inventor 刘慧军申伍先牛丽媛潘世林谷长栋卢磊金源
Owner ZOTYE INT AUTOMOBILE TRADING CO LTD
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