Preparation method of nanocarbon/lithium titanate composite coated positive electrode material with three-dimensional porous structure

A positive electrode material, three-dimensional porous technology, applied in the field of lithium ion battery materials, can solve the problems of unsolved lithium titanate electronic conductivity, material electrochemical properties decay, battery high temperature flatulence, etc., to achieve inhibition of irreversible capacity loss, high carbon package The effect of coverage rate and high safety
CN112635767AActive Publication Date: 2021-04-09ZHUJI PAWA NEW ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHUJI PAWA NEW ENERGY
Publication Date
2021-04-09

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Abstract

The invention belongs to the technical field of lithium battery materials, and provides a preparation method of a nanocarbon / lithium titanate composite coated positive electrode material with a three-dimensional porous structure. The method comprises the following steps: mixing xanthan gum and a titanium-containing compound to prepare a xanthan gum composite titanium dioxide mixed solution, then adding a positive electrode material, performing violent stirring to react completely, conducting freezing and vacuum drying, performing mixing with a lithium salt, conducting presintering and annealing to obtain the nano carbon / lithium titanate composite coated positive electrode material with a three-dimensional porous structure. Compared with a traditional method, the carbon nanofiber / lithium titanate composite coated positive electrode material with the three-dimensional porous structure prepared by the invention has the advantages of good cycling stability, rate capability and safety performance and effective inhibition of electrochemical impedance by forming the carbon nanofiber / lithium titanate nanoparticle composite material to be uniformly coated on the surface of the positive electrode material.
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Description

technical field

[0001] The invention relates to the field of lithium ion battery materials, in particular to a preparation method of a composite coated lithium battery cathode material. Background technique

[0002] With the rapid development of 3C electronic products, energy storage, transportation and other fields, the application space of lithium-ion batteries is also increasing. Especially with the expansion of the industrialization of new energy vehicles, the development of hybrid vehicles and all-electric vehicles has become inevitable. In this regard, the development of new energy materials with safety, environmental protection and excellent performance has gradually become an international research hotspot. However, there are many defects in the specific capacity and safety of lithium-ion battery cathode materials, which will seriously affect the performance of the entire battery.

[0003] As one of the core components of the battery, the cathode material accounts f...

Claims

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