Preparation method of Ni-P alloy lithium ion battery cathode material of core-shell structure

A lithium-ion battery, core-shell structure technology, applied in battery electrodes, structural parts, circuits, etc., can solve the problems of hidden dangers in reaction safety, complicated preparation process, cumbersome steps, etc., and achieve low equipment requirements, high solution purity, and reaction conditionally controlled effects

Active Publication Date: 2012-08-01
ZHEJIANG UNIV
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Problems solved by technology

[0003] The commonly used methods for preparing various nanostructures of Ni-P alloys, such as nanopowders, nanowires, and nanohollow spheres, include hydrothermal method, oxidation-reduction method of transition metal phosphate, and decomposition reaction method of metal complexes. Among them, nanotubes, nanowires and other structures of Ni-P alloys generally need templates to assist the formation of their nanostructures. For example, the Chinese patent with the authorized announcement number CN100546916C discloses a preparation method of nickel phosphorus chromium nano-titanium dioxide amorphous nanocomposite , where nano-TiO 2 The materials are nanowires and nanotubes prepared by the AAO template method. Although the composite material prepared by this method has good seawater corrosi

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  • Preparation method of Ni-P alloy lithium ion battery cathode material of core-shell structure
  • Preparation method of Ni-P alloy lithium ion battery cathode material of core-shell structure
  • Preparation method of Ni-P alloy lithium ion battery cathode material of core-shell structure

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Example Embodiment

[0022] Example 1

[0023] Add 27 g of choline chloride (purchased from Aladdin Reagent (Shanghai) Co., Ltd.), 13 g of ethylene glycol and 15 g of propylene glycol into a three-necked flask, stir and mix at 120° C. to obtain a mixed solution, about 50 ml. 0.2594gNiCl 2 And 0.1681gNH 4 H 2 PO 2 Add them to the mixed solution one by one and dissolve by ultrasonic for 1 hour to obtain a reaction precursor solution. Then connect the reflux device, heat the reaction precursor solution to 90°C under normal pressure, and after reacting for 2 hours, remove the three-necked flask and immediately quench it with cold water. Disperse the obtained precipitate in a three-necked flask ultrasonically for 30 minutes, then transfer it to a centrifuge tube for centrifugal separation, and then wash the obtained precipitate with methanol and deionized water alternately, and then dry it in a vacuum box at 60°C. After 8 hours, a black solid powder Ni-P alloy lithium ion battery negative material was ob...

Example Embodiment

[0025] Example 2

[0026] Add 27 g of choline chloride (purchased from Aladdin Reagent (Shanghai) Co., Ltd.), 13 g of ethylene glycol and 15 g of propylene glycol into a three-necked flask, stir and mix at 120° C. to obtain a mixed solution, about 50 ml. 1.9454gNiCl 2 And 3.7352gNH 4 H 2 PO 2 Add them to the mixed solution one by one, and ultrasonically dissolve for 1.5 hours to obtain a reaction precursor solution. Then connect the reflux device, heat the reaction precursor solution to 180°C under normal pressure, and after reacting for 4 hours, remove the three-necked flask and immediately quench it with cold water. Disperse the resulting precipitate in a three-necked flask ultrasonically for 30 minutes, then transfer it to a centrifuge tube for centrifugal separation, and then wash the resulting precipitate with methanol and deionized water alternately, and then dry it in a vacuum box at 60°C 8 After hours, a black solid powder Ni-P alloy lithium ion battery negative electrod...

Example Embodiment

[0028] Example 3

[0029] Add 27 g of choline chloride, 17 g of ethylene glycol and 20 g of propylene glycol into a three-necked flask, stir and mix at 120° C. to obtain a mixed solution, about 60 ml. 3.2423gNiCl 2 And 4.1515gNH 4 H 2 PO 2 Add them to the mixed solution one by one, and dissolve by ultrasonic for 2h to obtain the reaction precursor solution. Then connect the reflux device, heat the reaction precursor solution to 210°C under normal pressure, and after reacting for 5 hours, remove the three-necked flask and immediately quench it with cold water. Disperse the resulting precipitate in a three-necked flask ultrasonically for 50 minutes, then transfer it to a centrifuge tube for centrifugal separation, and then alternately wash the resulting precipitate with methanol and deionized water, and then dry it in a vacuum box at 80°C. 8 After hours, a black solid powder Ni-P alloy lithium ion battery negative electrode material is obtained.

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Abstract

The invention discloses a preparation method of a Ni-P alloy lithium ion battery cathode material of a core-shell structure, which comprises the following steps of: mixing choline chloride, ethylene glycol and propylene glycol to obtain a mixed solution, orderly adding NiCl12 and NH4H2PO2 to the mixed solution to obtain a reaction precursor solution after ultrasonic dissolving, heating and back flowing the reaction precursor solution, and taking out precipitates to be processed to obtain final products. In the mixed solution, the molar ratio of choline chloride to ethylene glycol to propylene glycol is (0.5-1): (0.5-1.5): (0.5-1.5). The concentration of NiC12 and NH4H2PO is 0.01-1 mol/L based on the volume of the mixed solution is 1L. The raw materials adopted by the preparation method disclosed by the invention are common and easy to obtain, and the preparation process is simple and available. Reaction system components of the preparation method disclosed by the invention are simple, and the preparation method disclosed by the invention adopts a normal pressure and high temperature single-step backflow method, and has the advantages of simplicity in operation, no steam exhaust, energy conservation and environmental protection.

Description

Technical field [0001] The invention belongs to the technical field of materials and chemical power sources, and specifically relates to a method for preparing a core-shell structured Ni-P alloy lithium ion battery negative electrode material. Background technique [0002] As a high-performance rechargeable green power source, lithium-ion batteries have been widely used in various communication tools and portable electronic products in recent years, and will gradually be developed as the power source of electric vehicles, thereby promoting their safety, environmental protection, and low cost. The development of cost and high specific energy. The rapid development of new high-energy chemical power technology also puts forward higher requirements for battery materials. New battery materials with high energy density, high power density, low cost, and environmentally friendly are the current and future research priorities. The negative electrode material of lithium ion battery is a ...

Claims

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Application Information

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IPC IPC(8): H01M4/38
CPCY02E60/12Y02E60/10
Inventor 谷长栋张恒尤益辉王秀丽涂江平
Owner ZHEJIANG UNIV
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