A mass production method for water-based ion battery pole pieces with porous ceramic structure

An ion battery, porous ceramic technology, applied in battery electrodes, structural parts, electrode manufacturing and other directions, can solve the problems of difficult to meet environmental protection requirements, difficult to control the casting method, easy cracking of ceramic substrates, etc., to achieve safe and reliable equipment operation. The effect of low cost and significant practical value

Active Publication Date: 2021-05-07
BENAN ENERGY
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

But there are also many disadvantages for large-scale production, such as high requirements for slurry, solvents are generally harmful to the environment, and it is difficult to meet environmental protection requirements
Moreover, the water-based ion battery based on the thick pole piece design requires a pole piece thickness of 1 to 3mm, which is difficult to control by the casting method, and the ceramic substrate is easily cracked.

Method used

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  • A mass production method for water-based ion battery pole pieces with porous ceramic structure
  • A mass production method for water-based ion battery pole pieces with porous ceramic structure
  • A mass production method for water-based ion battery pole pieces with porous ceramic structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 50g of positive electrode ceramic powder LiMn 2 o 4 , Inorganic carbon source 10g carbon black, 20g activated carbon, 5g natural graphite powder are raw materials, use absolute ethanol as a solvent, control the solid content of the powder to be 40wt.%, use zirconia as ball milling beads, and the ratio of material to ball is 1:3 , the rough mill was ball milled for 1 h at a speed of 300 rpm to obtain a uniform slurry. Continue to add 15wt.% PVB binder, further ball mill at 200 rpm for 3 hours, and pour out the slurry. The obtained slurry was granulated using a closed-cycle spray granulation process, nitrogen gas was introduced as a protective gas, and the air inlet temperature of the spray drying equipment was set at 120°C. Set the outlet air temperature to 70°C. Set the centrifuge speed to 5000 rpm. Obtain granular powder with uniform particle size, collect ethanol vapor, and facilitate the next recycling. The obtained powder is further automatically batch-prepared...

Embodiment 2

[0056] 70g of positive electrode ceramic powder λ-MnO 2 , Inorganic carbon source 5g carbon black, 10g activated carbon, 5g natural graphite powder are raw materials, use absolute ethanol as a solvent, control the solid content of the powder to be 60wt.%, use zirconia as ball milling beads, and the ratio of material to ball is 1:5 , the rough mill was ball milled at 200 rpm for 2 hours to obtain a uniform slurry. Continue to add 10wt.% PVB binder, further ball mill at 250 rpm for 3 hours, and pour out the slurry. The obtained slurry was granulated using a closed-cycle spray granulation process, nitrogen gas was introduced as a protective gas, and the air inlet temperature of the spray drying equipment was set at 150°C. Set the outlet air temperature to 80°C. Set the centrifuge speed to 10000 rpm. Obtain granular powder with uniform particle size, collect ethanol vapor, and facilitate the next recycling. The obtained powder is further automatically batch-prepared with a pow...

Embodiment 3

[0062] 60g negative electrode ceramic powder NaTi 2 (PO4) 3 , Inorganic carbon source 10g carbon black, 10g activated carbon, 10g natural graphite powder are raw materials, use absolute ethanol as a solvent, control the solid content of the powder to be 30wt.%, use zirconia as ball milling beads, and the ratio of material to ball is 1:5 , a coarse mill at a high speed of 100 rpm / min for 5 hours to obtain a uniform slurry. Continue to add 10wt.% PVB binder, further ball mill at 150 rpm for 4 hours, and pour out the slurry. The obtained slurry was granulated using a closed-cycle spray granulation process, and argon was introduced as a protective gas, and the spray drying equipment was set at an inlet air temperature of 250°C. Set the outlet air temperature to 120°C. Set the centrifuge speed to 10000 rpm. Obtain granular powder with uniform particle size, collect ethanol vapor, and facilitate the next recycling. The obtained powder is further automatically batch-prepared in ...

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Abstract

The invention relates to a method for mass production of pole pieces of water-based ion batteries with a porous ceramic structure, comprising: step 1) using ceramic powder used for electrodes of water-based ion batteries and an inorganic carbon source conductive agent as raw material powders, and using absolute ethanol As a solvent, add an organic binder, and ball mill to obtain a uniform slurry; step 2) use centrifugal spray drying equipment to dry and granulate the slurry, and collect the obtained powder; step 3) use the obtained powder to The dry pressing method is used to prepare battery pole pieces in batches. The pole piece powder obtained by the method is uniformly mixed, has good carbon coating property, uniform porosity in forming the pole piece, smooth surface and good thickness consistency.

Description

technical field [0001] The invention relates to a mass production method for water-based ion battery pole pieces with a porous ceramic structure, in particular to a method for preparing battery positive and negative pole pieces automatically in batches by adopting ball milling and mixing, centrifugal spray drying and granulation, and using a powder forming tablet press machine The invention discloses a ceramic blank production process, which belongs to the field of ceramic powder materials. Background technique [0002] With the development of modern power systems, the role of energy storage technology is becoming more and more important, and electrochemical energy storage is the key to energy storage technology. Water-based (sodium, lithium) ion batteries have been widely studied due to their outstanding advantages such as high specific energy, high working voltage, small self-discharge, long cycle life, stable discharge performance, and low environmental pollution. At pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/02
CPCH01M4/02H01M4/04H01M2004/021Y02E60/10
Inventor 曾诗蒙刘宇贺诗阳张永献贺健夏骥张娜
Owner BENAN ENERGY
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