Preparation method of peach-kernel-shaped SnO2-graphene-carbon composite material for lithium ion battery

A technology of lithium-ion batteries and carbon composite materials, applied in the field of materials, can solve problems such as structural damage, shedding, and poor cycle stability

CN103887488AActive Publication Date: 2014-06-25HARBIN INST OF TECH

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Patent Information

Authority / Receiving Office: CN · China
Current Assignee / Owner: HARBIN INST OF TECH
Publication Date: 2014-06-25

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Abstract

The invention discloses a preparation method of a peach-kernel-shaped SnO2-graphene-carbon composite material for a lithium ion battery. The preparation method comprises the steps: with tin salt as a raw material of the composite material and graphene oxide as a carrier, mixing tin salt and graphene oxide, then, carrying out ultrasonic treatment, stirring and spraying to prepare a precursor of the composite material; then, mixing the precursor and a carbon source solution, and next, carrying out hydrothermal treatment to prepare the composite material. The peach-kernel-shaped carbon-coated tin-based composite material prepared by using the method has the advantages that SnO2 particles are loaded on graphene, then, a carbon layer is coated outside the composite material, and the whole structure is shaped like a peach kernel and can be used for better constraining the volume change of tin dioxide particles, so that the material has more excellent cyclic performance.

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Description

technical field

[0001] The invention belongs to the technical field of materials, and relates to a method for preparing a peach kernel-shaped tin-based composite material by adopting a spray drying-hydrothermal method. Background technique

[0002] The development of electric vehicles and hybrid electric vehicles has promoted the development of the lithium-ion battery industry. The development of new materials with high specific capacity and high safety that can replace graphite negative electrodes is coming soon. SnO 2 As a kind of lithium-ion battery anode material with high safety and high specific capacity, it has attracted people's attention.

[0003] Due to SnO 2 During the lithium ion deintercalation process, the material undergoes a large volume change, which leads to the shedding and pulverization of the active material, and finally leads to the deactivation of the electrode material. So, to prevent SnO 2 The pulverization of particles is an urgent problem to be...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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