Granulating and forming method for positive electrode
A molding method and granulation technology, applied in the direction of die extrusion and granulation, can solve the problem that the battery does not have large flow and low temperature performance, and achieve the effect of improving structure and porosity, improving performance and improving performance.
Inactive Publication Date: 2010-10-20
濮阳迈奇能源技术有限公司
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The battery made in this way does not have a large flow rate and good low temperature performance
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] The positive electrode granulation forming method comprises the following steps:
[0018] 1) Stir the polytetrafluoroethylene, alcohol and acetylene carbon black according to the ratio;
[0019] 2) Put the stirred raw material into a mold and extrude it into a cylinder;
[0020] 3), the formed wet charcoal bag is placed at a temperature of 280 degrees Celsius for 30 minutes to remove alcohol and carry out fibrillation;
[0021] 4) Put the fibrillated charcoal bag into the high-speed rotating mesh cage, the mesh cage rotates at high speed, the charcoal bag powder passes through the mesh to form powder; there are crushing teeth in the mesh cage, and the charcoal bag is broken by the crushing teeth ;
[0022] 5) Soak the powder in the polytetrafluoroethylene solution for 3 to 5 minutes;
[0023] 6), the powder soaked in the polytetrafluoroethylene solution is extruded into a cylinder for the second time;
[0024] 7), finally at a temperature of 280 degrees Celsius, pla...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a granulating method for a lithium battery, in particular to a granulating and forming method for a positive electrode. The granulating and forming method for the positive electrode comprises the following steps of: 1) uniformly stirring polytetrafluoroethylene, alcohol and acetylene carbon black in proportion; 2) placing the stirred raw materials into a mould to extrude so as to form a shape with a smooth side wall; 3) removing the alcohol from a formed wet carbon bag and fibrillating the carbon bag; 4) crushing the fibrillated carbon bag to form powder; 5) soaking the powder in polytetrafluoroethylene solution for 3 to 5 minutes; 6) performing secondary extrusion on the powder soaked by the polytetrafluoroethylene solution to form the shape with smooth side wall; and 7) finally removing the alcohol. By forming the porous acetylene carbon black by using the polytetrafluoroethylene powder linking agent, crushing the porous acetylene carbon black after the fibrillating modification and performing secondary adhesion, the method improves the carbon cathode structure and the porosity, greatly improves the performance of the battery during high-power discharge and improves the application performance in a low temperature state.
Description
technical field [0001] The invention relates to a lithium battery granulation method, in particular to a positive electrode granulation forming method. Background technique [0002] At present, the production method of the positive electrode of lithium battery is: firstly mix well-proportioned tetrafluoroacetic acid, alcohol and acetylene carbon black and extrude, then remove the alcohol from the wet carbon bag and carry out fibrillation, and finally cut according to the requirements. The battery made in this way does not have high flow rate and good low temperature performance. Contents of the invention [0003] The object of the present invention is to provide a lithium battery with high current discharge and good low temperature performance. [0004] The technical scheme provided by the invention is: [0005] The positive electrode granulation forming method comprises the following steps: [0006] 1) Stir the polytetrafluoroethylene, alcohol and acetylene carbon blac...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B01J2/22
Inventor 庄俊峰李启伟李申孟令杰杨晓聪
Owner 濮阳迈奇能源技术有限公司