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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AI-Extracted 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 ne...

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.

Application Domain

NanotechnologyPhosphorus compounds

Technology Topic

Water solubleLithium electrode +11

Examples

Experimental program(10)

Example Embodiment

[0014] Embodiment one:

[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.

Example Embodiment

[0016] Embodiment two:

[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.

Example Embodiment

[0018] Embodiment three

[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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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

high specific capacity
good cycle performance

Metal lithium-framework carbon composite material and preparation method thereof, negative electrode and secondary battery

ActiveCN105374991Ahigh specific capacitygood cycle performance

Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI

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

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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