Preparation method of graphene/metal carbide porous micro-sphere electrode

A metal carbide, porous microsphere technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of affecting cycle stability, battery performance degradation, volume expansion of negative electrode materials, etc., to facilitate lithium intercalation and delithiation reactions. , the effect of reducing impact and improving performance

Active Publication Date: 2017-02-01
内蒙古元瓷新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the volume expansion of the existing negative electrode material, which causes battery performance attenuation and affects the cycle stability, and provides a method for preparing a graphene / metal carbide porous microsphere electrode

Method used

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  • Preparation method of graphene/metal carbide porous micro-sphere electrode
  • Preparation method of graphene/metal carbide porous micro-sphere electrode
  • Preparation method of graphene/metal carbide porous micro-sphere electrode

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specific Embodiment approach 1

[0043]Specific embodiment one: this embodiment is a kind of preparation method of graphene / metal carbide porous microsphere electrode, is to finish according to the following steps:

[0044] 1. Preparation of graphene oxide:

[0045] ①. Add natural graphite and potassium permanganate to sulfuric acid with a mass fraction of 98%, then stir for 1h to 2h in an ice bath and at a stirring speed of 300r / min to 400r / min to obtain mixture A;

[0046] The mass ratio of natural graphite and potassium permanganate described in step 1. 1. is 1:5;

[0047] The volume ratio of the mass of the natural graphite described in step 1. to 98% sulfuric acid is 1g: 60mL~100mL;

[0048] ②. Heat mixture A to 35°C, then keep it warm at 35°C for 1 hour, then add deionized water to mixture A, then raise the temperature of the mixture with deionized water to 90°C~95°C, and then heat the mixture at 35°C Insulate at 90°C to 95°C for 30min to 35min to obtain mixture B;

[0049] The volume ratio of mixtur...

specific Embodiment approach 2

[0071] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the power of the ultrasonic dispersion described in step 2 ③ is 100W-150W. Others are the same as the first embodiment.

specific Embodiment approach 3

[0072] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the power of the ultrasonic dispersion described in step 2 ④ is 100W-150W. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of a graphene / metal carbide porous micro-sphere electrode, and relates to a preparation method of a hierarchically structured three-dimensional composite material. The invention aims to solve the problems of battery performance degradation and cycling stability influence caused by volume expansion of an existing anode material. The method comprises the following steps: firstly, preparation of oxidized graphene; secondly, preparation of a mixed solution; thirdly, drying; fourthly, annealing treatment to obtain the graphene / metal carbide porous micro-sphere electrode. The graphene / metal carbide porous micro-sphere electrode prepared in the invention as a lithium ion battery anode material has good electrochemical lithium storage performance, the capacity of a battery prepared by using the graphene / metal carbide porous micro-sphere electrode as the battery anode material under the current density of 0.1 A / g is greater than 500 mAh / g, the capacity of the battery under the current density of 3 A / g is greater than 300 mAh / g, and the capacity is hardly attenuated after 500 times of circulation. The preparation method is suitable for preparing the graphene / metal carbide porous micro-sphere electrode.

Description

technical field [0001] The invention relates to a method for preparing a three-dimensional composite material with a hierarchical structure. Background technique [0002] With the rapid economic development, human beings are facing the threat of energy depletion in the future. At the same time, the problem of environmental pollution is prominent. It is imminent to develop new clean and green new energy sources. Various energy storage batteries have begun to receive great attention. The performance of the electrode material of the battery is a key factor in determining the performance of the chemical power source. Lithium-ion batteries have excellent properties such as high specific energy, small memory effect, and less environmental pollution. They have become widely used secondary batteries in electronic products such as mobile phones and notebook computers. It also has great application prospects. The negative electrode material is an important part of lithium-ion batte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/587H01M4/58H01M4/1393H01M4/1397H01M10/0525
CPCH01M4/1393H01M4/1397H01M4/362H01M4/58H01M4/587H01M10/0525Y02E60/10
Inventor 刘晓旭朱波王影闫凯池红岩张晓兰孙飞
Owner 内蒙古元瓷新材料科技有限公司
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