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Inorganic mixed type lithium ion super capacitor

A supercapacitor and hybrid technology, applied in the field of capacitors, can solve problems such as cycle life needs to be further improved, cycle life is not ideal, and manufacturing process is complicated, etc., to achieve the effect of increasing energy density, improving utilization rate, and high energy

Active Publication Date: 2008-10-08
SHANGHAI AOWEI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these hybrid supercapacitors, Ni(OH) 2 / KOH / AC supercapacitors have achieved large-scale production, and the energy density can reach 12Wh / Kg, and have been successfully applied in electric vehicles, hybrid electric vehicles and other related fields, but their cost is high and their cycle life is not ideal. At 20,000-30,000 times; PbO 2 / H 2 SO 4 / AC supercapacitor energy density can reach 15-18Wh / Kg, but its life is short, can only reach 3-5 thousand cycle life, and there is lead pollution, so this kind of capacitor has not been industrialized; AC / organic Electrolyte / Li 4 Ti 5 o 12 Supercapacitors only stay in the laboratory research stage, and their energy density reaches 10-15Wh / Kg, but the manufacturing process is complicated, and the cycle life needs to be further improved

Method used

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  • Inorganic mixed type lithium ion super capacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Example 1: Production of positive electrode sheet: LiMn 2 O 4、Graphite powder and PVDF are mixed according to the mass ratio of 88:9:3, adjusted into slurry with NMP (1-methyl-2-pyrrolidone), then coated on the burr steel strip, dried (120~130℃), Rolled and cut pieces into a size of 150*90*0.5mm 3 , And spot-weld the tabs. The production of the negative electrode sheet: the activated carbon, conductive carbon black, and PVDF are mixed in a mass ratio of 92:4.5:2.5, adjusted into a slurry with NMP, and then coated on the burr steel strip, dried (120~130℃), and rolled , The cut piece is made into a size of 150*90*1.6mm 3 , And spot weld on the tab. Select polyethylene microporous film as the diaphragm, stack the positive electrode sheet (18 pieces), the diaphragm, and the negative electrode sheet (19 pieces) into the electric core, use the 80,000F shell to assemble the square capacitor, and inject 2mol / l Li 2 SO 4 600g aqueous solution, and then refer to the automotive superc...

Embodiment 2

[0035] Example 2: Production of positive electrode sheet: LiMn 2 O 4 、Graphite powder and PVDF are mixed according to the mass ratio of 88:9:3, adjusted into slurry with NMP (1-methyl-2-pyrrolidone), then coated on the burr steel strip, dried (120~130℃), Rolled and cut pieces into a size of 150*90*0.5mm 3 , And spot-weld the tabs. The production of the negative electrode sheet: the activated carbon, conductive carbon black, and PVDF are mixed in a mass ratio of 92:4.5:2.5, adjusted into a slurry with NMP, and then coated on the burr steel strip, dried (120~130℃), and rolled , The cut piece is made into a size of 150*90*1.6mm 3 , And spot weld on the tab. Choose polyethylene microporous membrane as the diaphragm, stack the positive electrode sheet (18 pieces), the diaphragm, and the negative electrode sheet (19 pieces) into the electric core, and use the 80,000F shell to assemble the square capacitor, and inject (2mol / l Li 2 SO 4 +0.2mol / lK 2 SO 4 ) 600g of mixed solution, and then...

Embodiment 3

[0039] Example 3: Production of positive electrode sheet: LiMn 2 O 4 , Graphite powder and PVDF are mixed according to the mass ratio of 82:13:5, and NMP (1-methyl-2-pyrrolidone) is used to prepare a slurry, and then coated on the burr steel strip, after drying (120~130℃), Rolled and cut pieces into a size of 150*90*0.5mm 3 , And spot-weld the tabs. The production of the negative electrode sheet: The activated carbon, conductive carbon black, and PVDF are mixed at a mass ratio of 86:8:6, and NMP is used to adjust the slurry, and then coated on the burr steel strip, dried (120~130℃), and rolled , The cut piece is made into a size of 150*90*1.6mm 3 , And spot weld on the tab. Choose polyethylene microporous membrane as the diaphragm, stack the positive electrode sheet (18 pieces), the diaphragm, and the negative electrode sheet (19 pieces) into the electric core, and use the 80,000F shell to assemble the square capacitor, and inject (2mol / l Li 2 SO 4 +0.2mol / l K 2 SO 4 ) 600g of mix...

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Abstract

The present invention relates to an inorganic hybrid lithium ion super capacitor, which comprises a positive electrode, a negative electrode, a separating film between the electrodes, and inorganic electrolyte containing lithium ions; the super capacitor is characterized in: the positive electrode is made of one or more lithium ion embedded compounds; the negative electrode is made of one or several materials among active carbon, nanometer carbon tube, carbon fiber, resin carbon, and organic polymer pyrolytic carbon; in addition, the compatibility and mass percents of the materials for the positive and negative electrodes are optimized; moreover, a separating film with high compatibility and electrolyte material with high conductivity are used, so that the energy density of the super capacitor is greatly improved; in addition, the super capacitor has an extremely long cycle life, and can be used in a variety of environments that require high power and zero maintenance.

Description

Technical field [0001] The invention belongs to the technical field of capacitors, and relates to supercapacitors, especially inorganic hybrid lithium ion supercapacitors. Background technique [0002] Supercapacitors are a new type of electrochemical energy storage device between traditional capacitors and batteries. Compared with traditional capacitors, supercapacitors have a higher electrostatic capacity and can reach thousands of farads to ten thousand farads; they have higher power than batteries. Because of its density and long cycle life, it combines the advantages of traditional capacitors and batteries, and is a chemical power source with broad application prospects. It has the characteristics of high specific capacity, high power, long life, wide operating temperature limit, and maintenance-free. [0003] According to the different energy storage principles, supercapacitors can be divided into three categories: electric double layer capacitors (EDLC), Faraday quasi-capa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/035H01M4/58H01M4/48H01M10/00H01M14/00
CPCY02E60/13Y02E60/10
Inventor 许检红王然苗小丽
Owner SHANGHAI AOWEI TECH DEV
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