Graphene composite transition metal oxide nanofiber lithium ion battery electrode material and preparation method thereof

A graphene composite and lithium-ion battery technology, applied in the direction of battery electrodes, nanotechnology, nanotechnology, etc., can solve the problems of weak bonding, poor long-term cycle stability, and easy to fall off, so as to improve cycle stability and effective Facilitate intercalation and extraction, and improve the effect of lithium intercalation capacity
CN102931408AInactive Publication Date: 2013-02-13DALIAN OCEAN UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN OCEAN UNIV
Publication Date
2013-02-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a graphene composite transition metal oxide nanofiber lithium ion battery electrode material and a preparation method thereof. The composite electrode material combines a function of a graphene laminated structure for embedding and binding transition metal oxide nanoparticles, a function of a micropore tunnel structure interconnected in graphene composite transition metal oxide nanofiber for quickly embedding and taking off lithium ions and a function of three-dimensional space structures wound with each other among nanofibers and used for effectively releasing greatly-changed stress when the volume in an electrode membrane is expanded or contracted. Due to the integration of the three functions, the volume effect of the transition metal oxide material in the process of embedding / taking off the lithium ions can be effectively restrained and buffered, the loss of the irreversible capacity can be reduced, and then, the capacity and the cycling stability performance of a lithium ion battery are further improved.
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Description

technical field

[0001] The invention relates to a graphene composite transition metal oxide nanofiber lithium-ion battery electrode material and a preparation method thereof, in particular to an electrode material that can effectively suppress and buffer the volume effect of transition metal oxide materials in the intercalation / delithiation process, reducing Irreversible capacity loss, thereby obtaining lithium-ion battery electrodes with high capacity and stable cycle performance, belongs to the field of new chemical power sources and their preparation technologies. Background technique

[0002] Lithium-ion batteries have attracted widespread attention because of their advantages such as high voltage, high capacity, high power, and stable discharge. In the last ten years, with the continuous development of the integrated circuit (IC) and microelectromechanical system (MEMS) industries, higher requirements have been put forward for new embedded batteries that match them. Th...

Claims

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