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C-LiFePO4/PTPAn composite material, its application and lithium battery produced by composite material thereof

A composite material, lithium battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems affecting the performance of lithium batteries, low diffusion and transmission rate, etc., to achieve excellent cycle stability, high charge-discharge specific capacity, The effect of excellent fast charge and discharge performance

Inactive Publication Date: 2014-04-23
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As a cathode material, inorganic nano-LiFePO 4 Electrons inside and outside the cathode material and Li + The low diffusion and transport rate of lithium batteries are the main problems affecting the performance of lithium batteries

Method used

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  • C-LiFePO4/PTPAn composite material, its application and lithium battery produced by composite material thereof
  • C-LiFePO4/PTPAn composite material, its application and lithium battery produced by composite material thereof
  • C-LiFePO4/PTPAn composite material, its application and lithium battery produced by composite material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] First, 0.045mol of LiOH·H 2 O was added to 120mL ethylene glycol, stirred at a constant speed, and then 0.015mol of H 3 PO 4 and 0.015mol of FeSO 4 ·7H 2 O prepared as a mixed solution (H 2(030mL) was added dropwise to the above solution, and after the feeding was completed, the system was heated to 120°C for 20h. After the reaction was completed, it was cooled to room temperature, washed by centrifugation and deionized water, and the precipitate was dried to constant weight to obtain LiFePO 4 precursor, mix it with a certain amount of sucrose (the mass of sucrose is LiFePO 4 8% of the mass) mixed in a tube furnace in flowing high-purity N 2 In the program temperature control sintering, the heat treatment conditions are as follows: firstly, the temperature is raised from room temperature to 350°C at a rate of 5°C / min, kept for 1h, then raised to 650°C at a rate of 5°C / min, kept for 5h, then cooled to room temperature, and finally Get C-LiFePO 4 , and its scannin...

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Abstract

The invention provides a C-LiFePO4 / PTPAn composite material, its application and a lithium battery produced by the composite material thereof. The C-LiFePO4 / PTPAn composite material is characterized by taking a carbon-coated LiFePO4 material and PTPAn as raw materials and prepared by a solution blending method. The C-LiFePO4 / PTPAn composite material which is taken as a lithium ion batteries cathode material has good charge and discharge performances, cycle stability and high magnification performance.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to a C-LiFePO 4 / PTPAn composite material and its application as lithium battery cathode material and lithium ion battery made therefrom. Background technique [0002] With the further development of human society, the energy problems, resource problems and environmental problems facing the world are becoming more and more serious. Since the current energy structure is basically based on petrochemical fuels (petroleum, coal, natural gas), this not only causes resource depletion but also pollutes the environment. Electric energy will play an increasingly important role in the future due to its cleanliness, safety and convenience. Therefore, in the future, lithium-ion batteries with good mobility and convenient storage and power supply will play a pivotal role in a society based on electric energy. [0003] Traditional lithium-ion battery cathode materials mainly use ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/60H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 苏畅黄启飞张诚徐立环杨芳王灵敏
Owner ZHEJIANG UNIV OF TECH
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