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Surface-modified inorganic nanoparticles as well as preparation method and application thereof

A technology of inorganic nanoparticles and surface modification, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problem of synergistic effects between polymer matrix and nanoparticles, and the absorption of composite polymer matrix. Liquidity needs to be improved, uniform dispersion is difficult, etc., to achieve the effect of enhancing interface stability, low equipment requirements, and avoiding agglomeration or phase separation

Active Publication Date: 2017-09-05
浙江久功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

[0005] In order to solve the key problems in the prior art, such as the poor lipophilicity of inorganic nanoparticles, the difficulty of uniform dispersion, the difficulty in exerting the synergistic effect between the polymer matrix and the nanoparticles, and the need to improve the liquid absorption of the composite polymer matrix, the present invention provides a The surface-modified inorganic nanoparticles and their preparation method and application make the inorganic nanoparticles well dispersed in the polymer matrix, and the prepared polymer electrolyte has strong lyophilicity, high ion conductivity, and stable electrochemical performance

Method used

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  • Surface-modified inorganic nanoparticles as well as preparation method and application thereof
  • Surface-modified inorganic nanoparticles as well as preparation method and application thereof
  • Surface-modified inorganic nanoparticles as well as preparation method and application thereof

Examples

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Embodiment 1

[0046] In this example, the surface-modified inorganic nanoparticles are composed of the core of the inorganic metal oxide nanoparticles and the amphiphilic organic chain segment grafted on the particle surface, wherein: the amphiphilic organic chain segment grafted on the particle surface The segment accounts for 15% of the mass fraction of the inorganic nanoparticles, the inorganic metal oxide nanoparticles are aluminum oxide, and the amphiphilic organic segment consists of vinyltrimethoxysilane and 2-acrylamide-2-methylpropanesulfonic acid ( AMPS) were produced by solution polymerization.

[0047] Such as figure 1 Shown, the specific preparation method of the above-mentioned surface-modified inorganic nanoparticles is as follows:

[0048] 1. Measure 45ml of NMP solvent, transfer it to a 250ml three-necked flask, add 0.078g AMPS and 0.072g vinyltriethoxysilane, install a condensing reflux device, and pass nitrogen for 10 minutes while stirring, and then under the protection...

Embodiment 2

[0060] The difference between this embodiment and Example 1 is that the amphiphilic organic segment grafted on the surface of the particles accounts for 5% of the mass of the inorganic nanoparticles, the amount of AMPS added is 0.026g, and the amount of vinyltriethoxysilane is 0.024g, the amount of the initiator azobisisobutyronitrile is 0.001g, and the amount of lithium hydroxide monohydrate is 0.0053g.

Embodiment 3

[0062] The difference between this example and Example 1 is that the amount of poly(vinylidene fluoride-hexafluoropropylene) is 9.9g, and the amount of pore-forming agent polyvinylpyrrolidone is 2.0g.

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Abstract

The invention discloses surface-modified inorganic nanoparticles as well as a preparation method and application thereof. The surface-modified inorganic nanoparticles are composed of a core of inorganic metal oxide nanoparticles and amphipathic organic segments grafted on the surface of the particles, wherein the amphipathic organic segments grafted on the surface of the particles account for 0.1-50% of total mass of the surface-modified inorganic nanoparticles; the inorganic metal oxide nanoparticles refer to one or several in aluminum oxide, silicon dioxide, titanium dioxide, zirconium dioxide and zinc oxide inorganic nanoparticles; and the amphipathic organic segments are produced from a vinyl silicane coupling agent and 2-acrylamido--methylpropane sulfonic acid through solution polymerization. The surface-modified inorganic nanoparticles can be used for preparing polymer electrolyte. Therefore, the inorganic nanoparticles are high in dispersity in a polymer matrix, and the prepared polymer electrolyte is high in lyotropic property, high in ionic conductivity and stable in electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a modified nano particle and its preparation method and application, in particular to a surface graft modified inorganic nano particle, its preparation method and its application in preparing a polymer electrolyte membrane. Background technique [0002] Energy shortage and environmental pollution have become bottlenecks restricting sustainable economic and social development, and it is urgent to develop new energy utilization methods to replace traditional fossil energy. Lithium-ion batteries have many advantages such as high energy density and power density, long service life, low self-discharge, no memory effect, and environmental friendliness. and other fields have broad application prospects. However, at present, traditional lithium-ion batteries use a large amount of carbonate-based organic electrolytes, which are highly volatile, have low flash points, are flamma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M10/0565H01M2300/0082Y02E60/10
Inventor 王振波贺克武陆阳隋旭磊周玉祥
Owner 浙江久功新能源科技有限公司
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