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Lithium ion battery electrode material synthesized by using full-solution process

A lithium-ion battery and electrode material technology, which is applied in the field of lithium-ion battery electrode materials synthesized by the full solution method, can solve the problems of unfavorable industrial production, high requirements for equipment and synthesis environment, complex process, etc., and achieve good consistency and easy parameters Simple effect of control and synthesis process

Inactive Publication Date: 2012-03-21
长春劲能科技集团有限公司
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sol-gel method has obvious advantages in the preparation of LiFePO4 cathode materials. However, the sol-gel method is very complicated and needs to control many parameters. It has high requirements for equipment and synthesis environment, which is not conducive to industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Lithium hydroxide, iron nitrate, and phosphoric acid are weighed according to the molar ratio of lithium, iron, and phosphate radicals at a ratio of 0.95:1:1. The total mass of the three is 1 kg, and the three are dissolved in water respectively to make a mass ratio The concentration is 5%, 10%, 15% solution. Weigh 0.05 kg of sucrose, dissolve it in water, and prepare a solution whose mass ratio concentration is 25%. The solution prepared above was mixed for 1 hour to make a homogeneous liquid. A spray agent is used for spraying to prepare lithium iron phosphate nanoparticles. The lithium iron phosphate nanoscale precursor obtained by spraying was placed in N 2 In the atmosphere, it was calcined at 550° C. for 1 hour. Cool naturally to room temperature to obtain nanoscale lithium iron phosphate.

Embodiment 2

[0017] Lithium fluoride, iron nitrate, and ammonium dihydrogen phosphate are weighed according to the molar ratio of lithium, iron, and phosphate radicals at a ratio of 1:1:1. The total mass of the three is 1 kg. The mass ratio concentration is 10%, 15%, and 20% solution. Weigh 0.15 kg of fructose, and dissolve it in water to prepare a solution with a mass ratio concentration of 20%. The solution prepared above was mixed for 5 hours to make a homogeneous liquid. A spray agent is used for spraying to prepare lithium iron phosphate nanoparticles. The lithium ferrous phosphate nanoscale precursor obtained by spraying in H 2 In the atmosphere, it was calcined at 600° C. for 6 hours. Cool naturally to room temperature to obtain nanoscale lithium iron phosphate.

Embodiment 3

[0019] Lithium fluoride, ferric chloride, and diammonium hydrogen phosphate are weighed according to the molar ratio of lithium, iron, and phosphate radicals at a ratio of 1.05:1:1. The total mass of the three is 1 kg, and the three are dissolved in water respectively. Make the solution that mass ratio concentration is 15%, 20%, 25%. Weigh 0.25 kg of glucose, dissolve it in water, and prepare a solution with a mass ratio concentration of 15%. The solution prepared above was mixed for 12 hours to make a homogeneous liquid. A spray agent is used for spraying to prepare lithium iron phosphate nanoparticles. The lithium iron phosphate nanoscale precursor obtained by spraying was placed in N 2 In the atmosphere, it was calcined at 650° C. for 24 hours. Cool naturally to room temperature to obtain nanoscale lithium iron phosphate.

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Abstract

The invention belongs to a lithium ion battery electrode material synthesized by using a full-solution process. The lithium ion battery electrode material is prepared by the following steps of: preparing a precursory solution of lithium iron phosphate by taking an organic solvent, a lithium salt dissolved in water or the organic solvent, a ferric salt dissolved in water or the organic solvent, a compound being dissolved in water or the organic solvent and containing phosphate radicals and a compound being dissolved in water or the organic solvent and containing carbon elements as raw materials; spraying to form a nano-grade precursory solution of the lithium iron phosphate; and calcining the nano-grade precursory solution of the lithium iron phosphate, which is obtained through spraying, at a protective atmosphere to obtain a nano-grade lithium iron phosphate material. The produced lithium iron phosphate has high specific capacity, excellent cycle performance, higher compaction density and favorable processing performance; all the raw materials are dissolved in water or the organic solvent, a synthesis process is simple, few control parameters exist in the process of synthesizing the lithium iron phosphate and easy to control, and the produced electrode material has good consistence during large-scale production.

Description

technical field [0001] The invention belongs to an electrode material for a lithium ion battery synthesized by a full solution method. technical background [0002] Lithium-ion batteries are widely used in various electronic devices, such as mobile phones, notebook computers, digital cameras, UPS, etc. In recent years, with the development of lithium-ion battery technology, lithium-ion batteries have been used as power sources for electric vehicles and electric bicycles. This points out a new direction for the development of lithium-ion batteries. [0003] Lithium-ion batteries are composed of positive electrode active materials, negative electrode active materials, electrolytes, separators, current collectors, and casings. Among these components, the positive electrode active material plays a very important role, and it is also the focus of research in recent years. Traditional lithium-ion batteries usually use lithium cobalt oxide as the positive electrode active materi...

Claims

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Application Information

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IPC IPC(8): C01B25/45B82Y40/00
Inventor 谢海明王荣顺王钊
Owner 长春劲能科技集团有限公司
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