Method for modifying positive electrode of lithium ion battery by adding metal oxide/carbon composite material

A lithium-ion battery, carbon composite material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of expensive equipment, high deposition modification cost, unfavorable cycle performance, etc., and achieve the effect of simple operation
CN105390700AActive Publication Date: 2016-03-09HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2016-03-09

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Abstract

The invention discloses a method for modifying a positive electrode of a lithium ion battery by adding a metal oxide / carbon composite material, and belongs to the technical field of secondary lithium ion batteries. The modification method comprises: mechanically mixing a positive electrode active material of the lithium ion battery with an electrode additive, wherein the electrode additive is the composite material and consists of two parts of a conductive carbon material carrier and a metal oxide load. The electrode additive can reduce the rate of increment of impedance of the positive electrode of the lithium ion battery along with charging / discharging cycle, thereby achieving the purpose of improving the cycle performance of the lithium ion battery.
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Description

technical field

[0001] The invention belongs to the technical field of lithium-ion secondary batteries, and relates to a method for modifying the positive electrode of the lithium-ion battery to improve the service life of the lithium-ion battery, in particular to a method for modifying the positive electrode of the lithium-ion battery by adding a metal oxide / carbon composite material. Background technique

[0002] Due to the advantages of high voltage, large specific energy, small self-discharge and light weight, lithium-ion batteries have been widely used in notebook computers, mobile phones, wearable devices, electric vehicles and other fields. However, the capacity of lithium-ion batteries will gradually decay during the charge-discharge cycle, shortening their service life. With the rapid development of its application fields, the performance requirements for lithium-ion batteries are also increasing, so the problem of its cycle performance needs to be solved urgently. ...

Claims

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