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Carbon-rich porous SiOC negative-electrode material for lithium ion battery and preparation method thereof

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., to achieve the effects of buffering volume changes, stabilizing the amorphous structure, and ensuring integrity

Inactive Publication Date: 2018-08-03
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the present invention provides a carbon-rich porous SiOC negative electrode material for assembling lithium-ion batteries and a preparation method thereof, which solves the problem of high initial irreversible capacity and poor cycle stability of SiOC negative electrode materials for lithium-ion batteries. problem, and provide a preparation method of carbon-rich porous SiOC negative electrode material for lithium-ion batteries, and the source of raw materials is wide, the process is simple, and the cost is low

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  • Carbon-rich porous SiOC negative-electrode material for lithium ion battery and preparation method thereof
  • Carbon-rich porous SiOC negative-electrode material for lithium ion battery and preparation method thereof
  • Carbon-rich porous SiOC negative-electrode material for lithium ion battery and preparation method thereof

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0029] A carbon-rich porous SiOC negative electrode material for a lithium ion battery and a preparation method thereof, comprising the steps of:

[0030] S01: After the biomass waste is crushed and screened, it is ball milled. The ball milling time is 24 hours, the speed of the ball mill is 250r / min, and then it is taken out and dried; the treated biomass waste is screened and the particle size is less than 64 μm to obtain biomass. waste powder. Biomass waste can be selected from bagasse or corn straw or wheat straw or rice straw. In the embodiment, bagasse is selected as an example.

[0031] S02: Mix silicone resin and bagasse powder, and add an organic solution as a solvent, wherein the organic solution is used to dissolve the silicone resin; the organic solution can...

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Abstract

The invention provides a preparation method for a carbon-rich porous SiOC negative-electrode material used for a lithium ion battery. The preparation method comprises the following steps: subjecting biomass waste to pulverizing, sieving and ball milling successively, and then taking obtained biomass waste powder out for drying; mixing organic silicone resin with the biomass waste powder, adding anorganic solution as a solvent, carrying out heating and magnetic stirring to fully impregnate the biomass waste powder with the organic silicone resin, and then carrying out drying to obtain a mixture of the organic silicone resin and the biomass waste powder; placing the mixture in a tube furnace for high temperature sintering at 800 to 1100 DEG C under the protection of inert gas, carrying outheat preservation and then cooling the sintered mixture in the furnace; etching SiOC ceramic powder obtained in the previous step with a strong alkali solution and then carrying out drying; and putting the ceramic powder in the tube furnace, carrying out activation heat treatment under the protection of inert gas, then taking the treated ceramic powder out, boiling the treated ceramic powder in deionized water, carrying out washing with water until the ceramic powder is neutral, and then carrying out drying. The preparation method of the invention can overcome the problems of high initial irreversible capacity, poor cycle stability and the like of SiOC negative-electrode materials for the lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of preparation of functional ceramics and the field of lithium batteries, in particular to a carbon-rich porous SiOC negative electrode material for assembling lithium ion batteries and a preparation method thereof. Background technique [0002] With the rapid development of electronic technology and national defense technology and the development of a large number of new portable electronic products and electric tools, people have put forward higher and higher requirements for chemical power sources, especially high-performance secondary batteries. Lithium-ion secondary batteries have attracted extensive attention from researchers due to their high energy density, good cycle performance, and non-toxic and non-polluting raw materials. At present, commercialized lithium-ion batteries mainly use graphite-based carbon materials as negative electrode materials, but with the rapid development and application of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525
CPCH01M4/362H01M4/485H01M4/625H01M10/0525Y02E60/10
Inventor 潘建梅郭旭龙黄凯威刘雯雯孙昊宇沈伟赵宇轩
Owner JIANGSU UNIV
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