A nickel-based material with a spherical core-nanoporous shell composite structure and its preparation method

A nanoporous, composite structure technology, applied in structural parts, electrical components, battery electrodes, etc., can solve problems such as the difficulty in preparing spherical core-porous shell composite structures

Inactive Publication Date: 2020-10-16
SOUTHWEAT UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a nickel-based material with a composite structure of a spherical core-nanoporous shell and a preparation method thereof, which can solve the problem that it is difficult to prepare a composite structure of a spherical core-porous shell in the existing process

Method used

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  • A nickel-based material with a spherical core-nanoporous shell composite structure and its preparation method
  • A nickel-based material with a spherical core-nanoporous shell composite structure and its preparation method
  • A nickel-based material with a spherical core-nanoporous shell composite structure and its preparation method

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Embodiment 1

[0030] A method for preparing a nickel-based material with a spherical core-nanoporous shell composite structure, comprising the following steps:

[0031] (1) Nickel acetate is added into deionized water, stirred and dissolved, and the nickel acetate solution that the molar concentration is 0.01mole / L is prepared to obtain, then in the nickel acetate solution, adding weight is PVP that is 0.5% by weight of nickel acetate, stirred and dissolved to obtain mixed solution, set aside;

[0032] (2) Add oxalic acid to deionized water, stir and dissolve, and prepare an oxalic acid solution with a molar concentration of 0.011mole / L;

[0033] (3) Mix the mixed solution obtained in step (1) with the oxalic acid solution at a volume ratio of 0.5:1.0, stir evenly, then quickly add ammonia water dropwise, adjust its pH value to 7.0, stir again, and then statically Place and culture for 12h;

[0034] (4) After the standing culture, filter and collect the precipitate, wash it with deionized...

Embodiment 2

[0037] A method for preparing a nickel-based material with a spherical core-nanoporous shell composite structure, comprising the following steps:

[0038] (1) Nickel acetate is added in deionized water, stirred and dissolved, and the nickel acetate solution that the molar concentration is 0.05mole / L is prepared to obtain, then in the nickel acetate solution, adding weight is the PVP of nickel acetate weight 1.2%, stirred and dissolved, to obtain mixed solution, set aside;

[0039] (2) Add oxalic acid to deionized water, stir and dissolve, and prepare an oxalic acid solution with a molar concentration of 0.055mole / L;

[0040] (3) Mix the mixed solution obtained in step (1) with the oxalic acid solution at a ratio of 1:1 by volume, stir evenly, then quickly add ammonia water dropwise, adjust its pH value to 8.0, stir again, and then stand at 40°C Place and cultivate for 0.5h;

[0041] (4) After the standing culture, filter and collect the precipitate, wash it several times wit...

Embodiment 3

[0044] A method for preparing a nickel-based material with a spherical core-nanoporous shell composite structure, comprising the following steps:

[0045] (1) Nickel acetate is added into deionized water, stirred and dissolved, and the nickel acetate solution that the molar concentration is 0.1mole / L is prepared for preparation, then in the nickel acetate solution, adding weight is the PVP of nickel acetate weight 2%, stirred and dissolved, to obtain mixed solution, set aside;

[0046] (2) Add oxalic acid into deionized water, stir and dissolve, and prepare an oxalic acid solution with a molar concentration of 0.11mole / L;

[0047] (3) Mix the mixed solution obtained in step (1) with the oxalic acid solution at a ratio of 1.0:1.5 by volume, stir evenly, then quickly add ammonia water dropwise, adjust its pH value to 8.5, stir again, and then stand at 60° C. Place and culture for 2h;

[0048](4) After the standing culture, filter and collect the precipitate, wash it several ti...

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Abstract

The invention discloses a nickel-based material with a spherical core-nano porous shell composite structure and a preparation method of the nickel-based material. The method comprises the steps as follows: (1) dissolving nickel acetate in deionized water to prepare a nickel acetate solution, then, adding PVP, and performing stirring for dissolution; (2) stirring and mixing the solution obtained inthe step (1) with an oxalic acid solution, adjusting the pH value to 7.0-8.5, stirring the mixture, and leaving the mixture to stand for culture at 20-60 DEG C for 0.5-12 h; (3) performing filtration, collecting a precipitate, cleaning the precipitate 3-5 times, drying the precipitate at 70-95 DEG C for 6-12 h, performing heat treatment at 320-400 DEG C for 15-60 min under the protection of protective gas, and cooling the product to the room temperature to obtain the nickel-based material. A core-shell structure and a nano porous structure can be effectively composited in a nested manner, composite nesting of the spherical nickel core and the nano porous nickel shell can be realized, and a larger space exists between the core and the shell, which shows a bell structure.

Description

technical field [0001] The invention belongs to, and specifically relates to a nickel-based material with a spherical core-nano porous shell composite structure and a preparation method thereof. Background technique [0002] Nickel-based nanomaterials with core-shell structure and nanoporous structure are important functional materials, based on their inherent chemical reactivity, they have been widely used in the fields of electrocatalysis, chemical catalysis and electrode materials. [0003] With the development of the new energy technology revolution in the international community, the research and application of lithium batteries and fuel cells have been pushed to the cusp of history, and the most important key part of the battery—the electrode has always been the bottleneck of the development of high energy density batteries. The electrode materials in China are mainly noble metals such as Pt, Ir, Ru, etc. Due to the high price and limited quantity of these noble metals...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/86H01M4/90
CPCH01M4/366H01M4/38H01M4/8657H01M4/9041Y02E60/10Y02E60/50
Inventor 李涛马国华龚勇
Owner SOUTHWEAT UNIV OF SCI & TECH
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