Cathode material for graphene battery and preparation method thereof

A cathode material, graphene technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low specific capacity and poor cycle life, and achieve the effect of high specific capacity, improved cycle life, and large specific capacity

Active Publication Date: 2018-11-13
山东科思姆特种材料技术开发有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when graphene is used to make electrodes in batteri

Method used

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  • Cathode material for graphene battery and preparation method thereof
  • Cathode material for graphene battery and preparation method thereof
  • Cathode material for graphene battery and preparation method thereof

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[0033] The present invention also provides a method for preparing the foregoing cathode material for graphene batteries, which includes the following steps:

[0034] a) In a vacuum environment in a vacuum glove box, add carbon black, titanium, platinum, tungsten, molybdenum, and lithium to the polyimide conductive adhesive, stir it evenly, apply it on the surface of the substrate, and dry to obtain the primary cathode base material;

[0035] b) Oxidizing graphite into graphite oxide, dispersing the graphite oxide in deionization, and adding a reducing agent to obtain a pre-reduced graphene solution;

[0036] c) Coating the pre-reduced graphene solution obtained in step b) on the surface of the primary cathode substrate, irradiating with laser, and drying to obtain the cathode material for the graphene battery.

[0037] In the above technical solution, by first coating a mixture of carbon black, titanium, platinum, tungsten, molybdenum, lithium and polyimide conductive adhesive on the ...

Example Embodiment

[0043] Example 1

[0044] Weigh 5g of 300 mesh flake graphite and 2g NaNO 3 To ease, add 120mL concentrated sulfuric acid and place in an ice-water bath to stir, add 20g KMnO after 30min 4 After reacting for 60 minutes, transfer to a 40℃ warm water bath to continue the reaction for 30 minutes, then slowly add 230 mL of deionized water, and keep the reaction temperature at 98℃, stir for 5 minutes, add proper amount of hydrogen peroxide until no bubbles are generated, filter while hot, and deionize Wash with water and 5% hydrochloric acid until it is neutral for many times. After centrifugation, it is fully dried in a vacuum drying oven at 60°C to obtain graphite oxide.

Example Embodiment

[0045] Example 2

[0046] The cathode material for graphene batteries includes the following raw materials by weight:

[0047] 85g carbon rod, 2.2g polyimide conductive adhesive, 1g carbon black, 0.12g titanium, 0.11g platinum, 0.07g tungsten, 0.026g molybdenum, 0.13g lithium;

[0048] The preparation method of cathode material for graphene battery includes the following steps:

[0049] a) In the vacuum environment in the vacuum glove box, add carbon black, titanium, platinum, tungsten, molybdenum, and lithium to the polyimide conductive adhesive, stir it evenly, apply it on the surface of the carbon rod, and dry to obtain the primary cathode base material;

[0050] b) Take 1.5 g of the graphite oxide prepared in Example 1 and disperse it in deionization, and add a reducing agent to obtain a pre-reduced graphene solution;

[0051] c) Coating the pre-reduced graphene solution obtained in step b) on the surface of the primary cathode substrate, irradiating with laser, and drying to obtain...

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Abstract

The invention discloses a cathode material for a graphene battery and a preparation method thereof. By doping titanium, platinum, tungsten, molybdenum and lithium in conductive graphite, not only is the high specific capacity of the cathode material ensured, but also the conductivity of the cathode material is improved. The cathode material consists of three structures, including a substrate, a mixture of the conductive graphite, the titanium, the platinum, the tungsten, the molybdenum and the lithium and the grapheme sequentially from the inside to the outside. The cathode material of the structure has high conductivity and specific capacity, and maintains the high cathode specific capacity after multiple charge/discharge cycles, so that the cycle life of the graphene battery is prolonged. In addition, the preparation method of the cathode material for the graphene battery is simple in process, low in raw material cost and suitable for industrial production.

Description

technical field [0001] The invention relates to the battery field, in particular to a cathode material for a graphene battery and a preparation method thereof. Background technique [0002] Graphene is a honeycomb planar film formed by sp2 hybridization of carbon atoms. It is a quasi-two-dimensional material with only one atomic layer thickness, so it is also called monoatomic layer graphite. Andre Geim and Konstantin Novoselov, physicists at the University of Manchester in the United Kingdom, successfully separated graphene from graphite by micromechanical exfoliation, so they jointly won the 2010 Nobel Prize in Physics. The common powder production methods of graphene are mechanical exfoliation method and redox method, and the film production method is chemical vapor deposition method. Due to its very good strength, flexibility, electrical conductivity, thermal conductivity, and optical properties, it has been greatly developed in the fields of physics, materials science,...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/62
CPCH01M4/364H01M4/38H01M4/625Y02E60/10
Inventor 陈胜绪李增昆马志远
Owner 山东科思姆特种材料技术开发有限公司
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