High-performance lithium ion battery electrode material and preparation method

A lithium-ion battery and electrode material technology, applied in the field of electrochemistry, can solve problems such as poor cycle life of titanium pyrophosphate electrode materials, achieve the effects of overcoming poor cycle performance, ensuring cycle performance, and improving structural stability
CN103199245AActive Publication Date: 2013-07-10常州孚达新能源科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
常州孚达新能源科技有限公司
Publication Date
2013-07-10

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Abstract

The object of the present invention is to provide a novel titanium phosphate electrode material having good lithium ion battery characteristics, and is to solve the problem that the cycle life of a titanium pyrophosphate electrode material is poor in the prior art. The electrode material is intercalation compound carbon-coated C-Fe[x]TiP[2]O[7+x], and is a fast ion conductor electrode material of a three-dimensional structure. A preparation method comprises: (1) mixing and grinding TiO2 and NH4H2PO4, adding distilled water, stirring until the mixture is dried, finally placing the mixture in air for calcination to obtain TiP2O7; and (2) taking TiP2O7 obtained in Step (1) as a raw material, weighing TiP2O7 and an iron source material, mixing evenly, then adding a carbon source aqueous solution, stirring continuously at 40 DEG C until the mixture is dried, and finally calcining the mixture in a nitrogen atmosphere to obtain carbon-coated C-Fe[x]TiP[2]O[7+x].
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Description

technical field

[0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a novel high-performance lithium ion battery electrode material. Background technique

[0002] Titanium Pyrophosphate (TiP 2 O 7 ) electrode materials have attracted much attention due to their advantages of stable structure, good ionic conductivity, good safety, easy preparation, and abundant resources. At present, the application of this material in lithium-ion batteries is divided into two aspects. In organic lithium-ion batteries, titanium pyrophosphate has been widely studied as a positive electrode material; in aqueous lithium-ion batteries, titanium pyrophosphate as a negative electrode material has not been deeply studied. However, the electrochemical performance of this material is not ideal in both systems. In organic systems, pure titanium pyrophosphate has a contradiction between capacity and cycle life. The capacity of titanium pyrophosphate ...

Claims

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