Lithium titanate/graphene composite cathode material for lithium ion battery

A graphene composite, lithium-ion battery technology, applied in battery electrodes, batteries, negative electrodes and other directions, can solve the problems of low conductivity, poor high-rate charge and discharge performance, low specific capacity of lithium titanate negative electrode materials, etc. The effect of specific capacity, improved rate performance, and easy industrial production
CN104852028AInactive Publication Date: 2015-08-19HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI UNIV OF TECH
Publication Date
2015-08-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a lithium titanate / graphene composite cathode material for a lithium ion battery. The composite cathode material is obtained by mixing lithium titanate and graphene oxide and then performing reduction by a reducing agent. A preparation method of the composite cathode material comprises the steps of preparing pure-phase lithium titanate by a hydrothermal method, sufficiently mixing pure-phase lithium titanate and graphene oxide, adding an appropriate amount of reducing agent, and shifting pure-phase lithium titanate, graphene oxide and the reducing agent to a reaction kettle to react for a certain time at a certain temperature to obtain the lithium titanate / graphene composite cathode material. The method synthesizes the lithium titanate / graphene composite material by an industrially extensively used hydrothermal reaction, so that the method is simple to operate and low in equipment requirement, and is suitable for industrial production; and the prepared lithium titanate / graphene composite material has higher specific capacity, good high rate performance and excellent cycle performance, and is applicable to the fields of portable electronic equipment, electromobiles, energy storage equipment and the like.
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Description

technical field

[0001] The invention belongs to the field of electrochemistry and new energy materials, in particular to a lithium titanate / graphene composite negative electrode material for a lithium ion battery. Background technique

[0002] The rapid development of modern society has led to a sharp increase in human demand for energy. The development and utilization of clean and new energy is the only way for the development of human society. Lithium-ion batteries, as "green secondary batteries in the 21st century", have the advantages of high voltage, high specific energy, long charge and discharge life, no memory effect, less environmental pollution, fast charging, and low self-discharge rate. As an important chemical power source, lithium-ion batteries are gradually moving from batteries used in mobile phones, notebook computers, digital cameras, portable small appliances, submarines, and aerospace to the field of electric vehicle power. As global energy and enviro...

Claims

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