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Method for preparing lithium cell cathode and lithium cell made by the same

A lithium battery and cathode technology, applied in the direction of primary battery electrodes, electrode manufacturing, battery electrodes, etc., can solve the problems of unsuitable manufacturing of battery cathodes, high water and electricity consumption, low material utilization rate, etc., and achieve easy continuity and automation operation, reduction of three wastes discharge, and broad application prospects

Inactive Publication Date: 2008-10-08
汪以道
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the water in the slurry needs to be pumped out. In the process of vacuum pumping, the active materials in part of the battery cathode will be pumped out together, resulting in a decrease in the performance of the lithium battery, and the water and electricity consumption of this method High, low material utilization rate, large discharge of three wastes
The disadvantage of this method is: not only need to repeatedly roll the pasty active material to form a film, but also roll the film on the metal collector net, which makes this method only suitable for manual operation, and is difficult for continuous operation in large quantities, and The material utilization rate of this method is also low
However, this method has a small scope of application and is not suitable for producing lithium / sulfur dioxide (Li / SO 2 ) and lithium / thionyl chloride (Li / SOCl 2 ) battery cathode

Method used

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  • Method for preparing lithium cell cathode and lithium cell made by the same
  • Method for preparing lithium cell cathode and lithium cell made by the same

Examples

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Embodiment 1

[0032] Embodiment 1 The present invention lithium / sulfur dioxide (Li / SO 2 ) Preparation of battery cathode and battery

[0033] 1. Weigh 500g of emulsifier (TX-10) and 18500g of deionized water, add the above two substances into a 100L planetary mixer, set the stirring parameters as: rotation speed 380-400 rpm, stirring time 6-8 minutes , turn on the power of the mixer for mixing;

[0034] 2. Weigh 5000g of acetylene black and add it to a 100L planetary mixer that has stirred emulsifier (TX-10) and deionized water. The stirring parameters are set as: rotation speed 380-400 rpm, stirring time 8-10 minutes, Turn on the power of the mixer for mixing;

[0035] 3. Weigh 1000g of polytetrafluoroethylene (PTFE) dispersion (60%), and add it to a 100L planetary mixer that has stirred emulsifier (TX-10), deionized water, and acetylene black. The stirring parameters are set to: rotate The speed is 180-200 rpm, and the stirring time is 2 minutes;

[0036] 4. Add the "paste" that has b...

Embodiment 2

[0057] Embodiment 2 Lithium / thionyl chloride (Li / SOC1 of the present invention 2 ) Preparation of battery cathode and battery

[0058] 1. Weigh 500g of emulsifier (TX-10) and 18500g of deionized water, add the above two substances into a 100L planetary mixer, set the stirring parameters as: rotation speed 380-400 rpm, stirring time 6-8 minutes , turn on the power of the mixer for mixing;

[0059] 2. Weigh 5000g of acetylene black and add it to a 100L planetary mixer that has stirred emulsifier (TX-10) and deionized water. The stirring parameters are set as: rotation speed 380-400 rpm, stirring time 8-10 minutes, Turn on the power of the mixer for mixing;

[0060] 3. Weigh 1000g of polytetrafluoroethylene (PTFE) dispersion (60%), and add it to a 100L planetary mixer that has stirred emulsifier (TX-10), deionized water, and acetylene black. The stirring parameters are set to: rotate The speed is 180-200 rpm, and the stirring time is 2 minutes;

[0061] 4. Add the "paste" tha...

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Abstract

The invention relates to a method for preparing a lithium battery cathode and a lithium battery prepared from the cathode belonging to field of battery preparation. The invention provides a preparation method, which is capable of continuously producing, with low material loss and less discharge of the three wastes for the lithium battery cathode and the lithium battery prepared from the cathode. The preparation method includes steps: A. material mixing: sequentially stirring and mixing emulsifying agent, deionized water, acetylene black and polytetrafluoroethylene(PTFE) suspension solution by weight ratio of 1-3:71-76:20:4-6 to obtain a cream; B. drying; C. impregnating; D. pole sheet filming: tabletting and drying the cream particles and a metal afflux net to obtain the battery pole sheet. Advantages of the method are that material utilization rate is high, products consistency is good, continuous and automatic working is easy to be realized, the three wastes discharge is reduced, and applied prospect is wide.

Description

technical field [0001] The invention relates to a method for preparing a cathode of a lithium battery and a lithium battery prepared by the cathode, belonging to the field of battery manufacturing. Background technique [0002] Lithium batteries have been widely used due to their advantages of large capacity, high energy, long service life, and low environmental pollution. The lithium battery uses metal lithium as the anode, and its cathode (pole piece) is generally made of acetylene black, polytetrafluoroethylene (PTFE) dispersion and other binders coated on the metal mesh. [0003] The existing lithium battery cathode preparation methods mainly include: [0004] 1. Slurry method: This method is to mix acetylene black and an appropriate amount of pure water, and then add a certain amount of polytetrafluoroethylene (PTFE) dispersion and stir to form a slurry. Usually, the slurry is evenly coated on the surface by the papermaking method. On the metal collector net, the wate...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/08H01M6/14H01M10/36H01M10/40H01M4/13H01M4/139H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 汪以道
Owner 汪以道
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