Energy-saving and environment-friendly device for preparing lithium iron phosphate and preparation method

A lithium iron phosphate, energy-saving and environmentally friendly technology, applied in chemical instruments and methods, phosphorus compounds, sustainable manufacturing/processing, etc., can solve the problems of environmental pollution, large amounts of waste water and waste gas, etc. Strong control effect

Pending Publication Date: 2018-08-17
SHENZHEN CITY THROUGH SCI & TECH OF NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of waste water and waste gas will be produced in the production process, which will cause serious environmental pollution

Method used

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  • Energy-saving and environment-friendly device for preparing lithium iron phosphate and preparation method
  • Energy-saving and environment-friendly device for preparing lithium iron phosphate and preparation method
  • Energy-saving and environment-friendly device for preparing lithium iron phosphate and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment one: a kind of method for preparing lithium iron phosphate, is characterized in that, comprises the following steps:

[0056] S1) Weighing lithium source, iron source, carbon source and phosphoric acid in a certain proportion, wherein the molar ratio of elements Li:Fe:P in the raw material is 0.95:1:1.1, and the carbon source accounts for 6% of the total mass of the raw material;

[0057] S2) take by weighing 100g lithium hydroxide and dissolve in the No. 1 storage container by the solid content of 20wt%, take by weighing 300.5g ferrous oxalate and dissolve in the second storage container by the solid content of 20wt%, weigh 80g starch by weighing The solid content of 10wt% is dissolved in the No. 3 storage container, and 409g of phosphoric acid is weighed to be prepared in the No. 4 storage container by a concentration of 20wt%, all using water as a solvent;

[0058] S3) The slurry in the No. 1 storage container, the No. 2 storage container, the No. 3 storag...

Embodiment 2

[0061] Embodiment two: a kind of method for preparing lithium iron phosphate, is characterized in that, comprises the following steps:

[0062] S1) Weigh lithium source, iron source, carbon source and phosphoric acid in a certain proportion, wherein the molar ratio of elements Li:Fe:P in the raw material is 1.05:1:1.1, and the carbon source accounts for 8% of the total mass of the raw material;

[0063] S2) Take by weighing 100g lithium acetate and dissolve in No. 1 storage container by 20wt% solid content, take by weighing 300.5g ferrous oxalate by weighing 20wt% solid content and dissolve in No. 2 storage container, weigh 80g starch by 10wt% The solid content of % is dissolved in the No. 3 storage container, takes by weighing 409g phosphoric acid and is formulated in the No. 4 storage container by the concentration of 20wt%, all uses water as solvent;

[0064] S3) The slurry in the No. 1 storage container, the No. 2 storage container, the No. 3 storage container and the No. ...

Embodiment 3

[0067] Embodiment three: a kind of method for preparing lithium iron phosphate, is characterized in that, comprises the following steps:

[0068] S1) Weighing lithium source, iron source, carbon source and phosphoric acid in a certain proportion, wherein the molar ratio of elements Li:Fe:P in the raw material is 1.1:1:0.9, and the carbon source accounts for 12% of the total mass of the raw material;

[0069] S2) take by weighing 100g lithium hydroxide and dissolve in the No. 1 storage container by the solid content of 20wt%, take by weighing 300.5g ferric citrate and dissolve in the No. two storage container by the solid content of 20wt%, weigh 80g citric acid Dissolve in No. 3 storage container by the solid content of 10wt%, take by weighing 409g phosphoric acid and prepare in No. 4 storage container by the concentration of 20wt%, all use water as solvent;

[0070] S3) The slurry in the No. 1 storage container, the No. 2 storage container, the No. 3 storage container and the ...

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Abstract

The invention discloses an energy-saving and environment-friendly device for preparing lithium iron phosphate. The device comprises a tubular continuous reactor, an ultrasonic stirring tank, a spray drying tower and an atmosphere sintering furnace, wherein the ultrasonic stirring tank is communicated with the feeding pipeline of the spray drying tower through a material delivery pipeline, the discharge hole of the tubular continuous reactor is communicated with the feeding pipeline of the ultrasonic stirring tank through a discharge pipeline, and the tubular continuous reactor is provided withat least two feeding holes. The invention also discloses a method for preparing lithium iron phosphate by adopting the device. The whole preparation technology only comprises dissolution, mixed reaction, spray drying and calcination processes, so that the method has the advantages of short processes, simple operation and high controllability. The product discharged from the tubular continuous reactor does not need to be washed and filtered and directly enters the spray drying tower to be dried and granulated, so that the shape size of the material is controllable, the preparation process is further continuous, and the material has better uniformity and stability.

Description

technical field [0001] The invention relates to equipment for preparing lithium iron phosphate, in particular to an energy-saving and environment-friendly device for preparing lithium iron phosphate. Background technique [0002] As a result of climate change and the reduction of oil costs, society is required to turn to the development and utilization of sustainable and renewable resources. As an important energy storage element, lithium-ion batteries have received widespread attention and applications. Among them, the lithium iron phosphate material has the advantages of high power, high safety, and abundant raw material resources. It is considered to be an ideal lithium ion cathode material, and has good application and development prospects in communications, transportation, and energy storage. [0003] At present, the main methods for preparing lithium iron phosphate include: high-temperature solid-phase method, hydrothermal method, sol-gel method, and co-precipitation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/45
CPCC01B25/45C01P2002/72C01P2004/03C01P2006/40Y02P20/10
Inventor 魏春光梁燕王静霞李立良
Owner SHENZHEN CITY THROUGH SCI & TECH OF NEW ENERGY CO LTD
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