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Graphene/chromium nitride nano-composite material and preparation method thereof

A chromium nitride nano-composite material technology is applied in the field of graphene/chromium nitride nano-composite materials and their preparation, which can solve the problems of difficult control of CrN thin film process and high equipment cost, and achieve excellent microstructure stability and capacity. The effect of high retention rate and simple preparation equipment

Inactive Publication Date: 2012-01-25
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention solves the technical problems that the process of preparing CrN thin film by magnetron sputtering is difficult to control and the equipment cost is high

Method used

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  • Graphene/chromium nitride nano-composite material and preparation method thereof
  • Graphene/chromium nitride nano-composite material and preparation method thereof
  • Graphene/chromium nitride nano-composite material and preparation method thereof

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specific Embodiment approach 1

[0013] Embodiment 1: In this embodiment, the graphene / chromium nitride nanocomposite material is composed of 10%-90% graphene and 10%-90% chromium nitride in terms of mass percentage.

specific Embodiment approach 2

[0014] Embodiment 2: This embodiment differs from Embodiment 1 in that the graphene / chromium nitride nanocomposite material consists of 20%-80% graphene and 20%-80% chromium nitride in mass percentage.

specific Embodiment approach 3

[0015] Embodiment 3: This embodiment differs from Embodiment 1 in that the graphene / chromium nitride nanocomposite material consists of 30%-70% graphene and 30%-70% chromium nitride in mass percentage.

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Abstract

The invention discloses a graphene / chromium nitride nano-composite material and a preparation method thereof, belongs to the electrochemical field, and aims to solve the technical problems of high difficulty in control over a technical process and high equipment cost existing in the magnetron sputtering method for preparing a CrN thin film. The composite material consists of graphene and chromium nitride. The preparation method comprises the following steps of: 1, weighing a natural graphite and chromium nitride urea complex; 2, preparing graphene suspension; 3, preparing aqueous solution of chromium nitride urea complex, adding into the graphene suspension obtained by the step 2, and continuously stirring to obtain uniform dispersion; 4, preparing the graphene / Cr2O3 composite material; and 5, filling the graphene / Cr2O3 composite material into an atmosphere furnace, introducing nitrogen, heating and preserving heat, then reducing to room temperature under the protection of nitrogen to obtain the graphene / chromium nitride nano-composite material. The material is used for a negative electrode of a lithium ion battery.

Description

technical field [0001] The invention belongs to the field of electrochemistry; in particular, it relates to a graphene / chromium nitride nanocomposite material and a preparation method thereof. Background technique [0002] Lithium-ion batteries are the third generation of small batteries after nickel-cadmium batteries and nickel-metal hydride batteries. As a new type of chemical power source, it has outstanding advantages such as high working voltage, high energy density, stable discharge potential curve, low self-discharge rate, long cycle life, good low temperature performance, no memory, and no pollution. Since the commercialization of Sony Corporation in Japan in 1992, it has developed rapidly. It has gradually moved from batteries used in mobile phones, notebook computers, digital cameras, portable small appliances, and batteries used in submarines, aerospace, and aviation to the field of electric vehicles. As one of the main power sources of vehicles, energy storage b...

Claims

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Application Information

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IPC IPC(8): H01M4/36B82Y30/00B82Y40/00
CPCY02E60/12Y02E60/10
Inventor 付长璟赵国刚陈晶
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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