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Nickel-phosphorus-oxide composite lithium ion battery negative electrode material and preparation method therefor and lithium ion battery negative electrode prepared from same

A lithium-ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of unfavorable performance and low tap density of nanomaterials, and achieve stable reaction, low price and high yield Effect

Inactive Publication Date: 2018-02-09
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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  • Nickel-phosphorus-oxide composite lithium ion battery negative electrode material and preparation method therefor and lithium ion battery negative electrode prepared from same
  • Nickel-phosphorus-oxide composite lithium ion battery negative electrode material and preparation method therefor and lithium ion battery negative electrode prepared from same
  • Nickel-phosphorus-oxide composite lithium ion battery negative electrode material and preparation method therefor and lithium ion battery negative electrode prepared from same

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Embodiment 1

[0040] A preparation method of a nickel-phosphorus-oxygen composite lithium-ion battery negative electrode material, comprising the following steps:

[0041] (1) Add 50g of choline chloride and 44.6g of ethylene glycol into a 50ml three-necked flask, and stir at 80°C for 1 hour to obtain a deep eutectic solvent;

[0042] (2) Add 22g of dodecyltrimethylammonium bromide, ultrasonically dissolve, then add 1.45g of nickel nitrate hexahydrate and 1.06g of sodium dihydrogen phosphate, and ultrasonically dissolve it for 1 hour to obtain a reaction precursor solution;

[0043] (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 nega...

Embodiment 2

[0052] A preparation method of a nickel-phosphorus-oxygen composite lithium-ion battery negative electrode material, comprising the following steps:

[0053] (1) Add 50g of choline chloride and 44.6g of ethylene glycol into a 50ml three-necked flask, and stir at 100°C for 1 hour to obtain a deep eutectic solvent;

[0054] (2) Add 22g of dodecyltrimethylammonium bromide, ultrasonically dissolve, then add 1.45g of nickel nitrate hexahydrate and 0.53g of sodium dihydrogen phosphate, and ultrasonically dissolve it for 0.5 hours to obtain a reaction precursor solution;

[0055] (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 nega...

Embodiment 3

[0064] A preparation method of a nickel-phosphorus-oxygen composite lithium-ion battery negative electrode material, comprising the following steps:

[0065] (1) Add 50g of choline chloride and 44.6g of ethylene glycol into a 50ml three-necked flask, and stir at 80°C for 1 hour to obtain a deep eutectic solvent;

[0066] (2) Add 11g of dodecyltrimethylammonium bromide, ultrasonically dissolve, then add 2.18g of nickel nitrate hexahydrate and 1.06g of sodium dihydrogen phosphate, and ultrasonically dissolve it for 1 hour to obtain a reaction precursor solution;

[0067] (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 electrod...

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Abstract

The invention discloses a nickel-phosphorus-oxide composite lithium ion battery negative electrode material and a preparation method therefor and a lithium ion battery negative electrode prepared fromthe same. The preparation method comprises the following steps of performing mixing on choline chloride and ethylene glycol, and then performing heating and stirring to obtain an eutectic solvent; next, adding a cationic surface active agent, performing ultrasonic dissolving, then adding nickel nitrate hexahydrate and sodium dihydrogen phosphate, and performing ultrasonic dissolving to obtain a reaction precursor solution; and next, performing heating and refluxing on the reaction precursor solution, and then carrying out cleaning and drying to obtain the nickel phosphorus oxide micron spherical lithium ion battery negative electrode material, wherein the main components are Ni, Ni<3>P and NiO; and in the preparation process, the particles are self-assembled to obtain the large-dimensional microsphere material with the grain diameters of 0.1-0.2[mu]m. The composite lithium ion battery negative electrode material has excellent electrochemical performance.

Description

technical field [0001] The invention relates to the field of lithium-ion battery cell materials, in particular to a nickel-phosphorus-oxygen composite 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 metal phosp...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/525H01M4/38H01M10/0525
CPCH01M4/366H01M4/38H01M4/525H01M10/0525Y02E60/10
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