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Carbon-coated NiPx nanometer composite electrode material with monodisperse structure characteristic, and preparation method thereof

A carbon composite material and nanocomposite technology, applied in the direction of nanotechnology, nanotechnology, structural parts, etc. for materials and surface science, can solve the problems of poor cycle stability and low specific capacity, and achieve easy operation and high specific capacity , Excellent electrochemical performance

Active Publication Date: 2018-06-15
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a nickel phosphide material for the negative electrode of lithium ion batteries, and apply it to lithium ion batteries to overcome the problems of low specific capacity and poor cycle stability of current commercial carbon negative electrode materials

Method used

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  • Carbon-coated NiPx nanometer composite electrode material with monodisperse structure characteristic, and preparation method thereof
  • Carbon-coated NiPx nanometer composite electrode material with monodisperse structure characteristic, and preparation method thereof
  • Carbon-coated NiPx nanometer composite electrode material with monodisperse structure characteristic, and preparation method thereof

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Experimental program
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Embodiment 1

[0057] Carbon-coated NiP with monodisperse structure characteristics 2 Preparation of nanocomposite electrode materials:

[0058] Weigh 500 mg of multi-walled carbon nanotubes (XF NANO, INC, XFM19) and add them to 50 ml of concentrated nitric acid. Wall carbon nanotubes are centrifuged and cleaned until the pH of the supernatant is about 7. There are a large number of functional group molecules on the surface of the acidified carbon nanotubes, which can improve the surface activity of the material. Get the above-mentioned multi-walled carbon nanotube carbon material 500mg after acidification, and 10mmol Ni(NO 3 ) 2After mixing and grinding, the mixture was dissolved in 350 mL of N-methylpyrrolidone, and heated to reflux while stirring. The reflux temperature was 180° C. for 1 h. The obtained product was centrifuged, dried, and then calcined in an air atmosphere at a temperature of 350° C. for 1 h to obtain a nickel monoxide / carbon composite material. Take 100 mg of the ni...

Embodiment 2

[0062] Preparation of carbon-coated NiP nanocomposite electrode materials with monodisperse structural features:

[0063] Weigh 500mg of multi-walled carbon nanotubes and add them to 50ml of concentrated nitric acid. After ultrasonic treatment for 5 minutes, condense and reflux in an oil bath at 150°C, and centrifugally clean the obtained acidified multi-walled carbon nanotubes to the pH of the supernatant. The value is around 7. There are a large number of functional group molecules on the surface of the acidified carbon nanotubes, which can improve the surface activity of the material. Get the above-mentioned multi-walled carbon nanotube carbon material 500mg after acidification, and 10mmol Ni(NO 3 ) 2 After mixing and grinding, the mixture was dissolved in 350 mL of N-methylpyrrolidone, and heated to reflux while stirring. The reflux temperature was 180° C. for 1 h. The obtained product was centrifuged, dried, and then calcined in an air atmosphere at a temperature of 45...

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Abstract

The invention relates to a carbon-coated NiPx nanometer composite electrode material with monodisperse structure characteristic, and a preparation method thereof, wherein the carbon-coated NiPx nanometer composite electrode material comprises an electric conduction carbon material matrix and carbon-coated NiPx nanoparticles uniformly dispersed and distributed in the electric conduction carbon material matrix in a monodispersed state. According to the present invention, the carbon-coated NiPx nanoparticles are dispersed in the electric conduction carbon material matrix in the monodispersed state, such that the electron and lithium ion transmission path can be substantially shortened through the unique composition and the structure form, the mechanical strength of the composite material canbe improved, and the stress strain generated during the conversion reaction of the active material can be relieved so as to ensure the structural integrity of the electrode material.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrode materials, in particular to a NiP for lithium-ion battery x Electrode material and its preparation method. Background technique [0002] It has always been the top priority of our country to promote the stable development of society and the healthy growth of industry. The "Made in China 2050" strategic plan proposed in recent years has put forward higher requirements for the miniaturization, intelligence, high energy and portability of electronic products in the manufacturing industry. The development of industry is inseparable from the consumption of energy. At this stage, traditional fossil resources are becoming increasingly exhausted. The full utilization of clean and renewable energy (such as: wind energy, solar energy, tidal energy, etc.) is being widely concerned and researched by people. The research and development of efficient recyclable energy storage devices has ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/362H01M4/5805H01M4/62H01M4/625H01M4/628H01M10/0525H01M2220/20H01M2220/30Y02E60/10
Inventor 郭向欣娄沛莉崔忠慧
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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