Nano ferric phosphate hollow sphere lithium ion battery and preparation method thereof

A lithium-ion battery and nano-iron phosphate technology, applied in the manufacture of electrolyte batteries, battery electrodes, secondary batteries, etc., can solve the problems of poor electronic conductivity, limited electrochemical performance of LiFePO4, low diffusion rate, etc., and achieve good discharge performance , easy to popularize and produce on a large scale, good dispersion effect
CN102185154AInactive Publication Date: 2011-09-14NANJING NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING NORMAL UNIVERSITY
Publication Date
2011-09-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a lithium ion battery using nano ferric phosphate hollow sphere as anode material. The lithium ion battery comprises a positive electrode plate, a negative electrode plate, an electrolyte and a membrane. The battery is characterized in that the positive active material of the positive electrode plate is nanoscale hollow-sphere-shaped ferric phosphate with an average particle diameter of about 150-280nm. The nano ferric phosphate hollow sphere is synthesized by low temperature hydrothermal method. According to the invention, the lithium ion battery uses the nano ferric phosphate hollow sphere as positive active material, wherein the positive active material ferric phosphate with a nonscale hollow-sphere-shaped structure has low density and good dispersity, and the diffusion and transmission rate of Li <+> and electrons is high in the positive active material. The lithium ion battery prepared on the basis of the positive active material has the characteristics of good discharging performance, high cyclical stability and large specific capacity. The invention also discloses a preparation method of the lithium ion battery.
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Description

technical field

[0001] The invention relates to a lithium ion battery in which the cathode material is nano-iron phosphate hollow spheres and a preparation method thereof, belonging to the fields of material preparation and energy batteries. Background technique

[0002] Lithium-ion batteries have been widely used in portable electronic products and communication tools in recent years because of their excellent environmental protection properties. They also have broad applications in the power plant applications of electric vehicles (EV) and hybrid electric vehicles (HEV) Therefore, improving the performance of lithium-ion batteries is a hot research topic at present. Among them, the selection of electrode materials is a key determinant of the performance of lithium-ion batteries.

[0003] Since Goodenough et al first reported the LiFePO with olivine structure 4 After having reversible de-lithiation / intercalation characteristics, because of its low price, environmental fri...

Claims

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