Preparation process of long-lived negative pole piece and capacitor battery using negative pole piece

A preparation process and technology of capacitor batteries, which are applied to capacitor electrodes, capacitor half-cells, primary or secondary half-cells, hybrid capacitor electrodes, etc., can solve cycle life constraints, pole piece compaction density limitations, and unsatisfactory energy density and other issues to achieve the effect of high energy density and long cycle life

Active Publication Date: 2010-09-29
SHANGHAI AOWEI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the compaction density of these organic hybrid supercapacitors is limited due to the traditional coating method used for the pole pieces, so the energy density is not ideal compared with traditional batteries, and the cycle life is also restricted.

Method used

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  • Preparation process of long-lived negative pole piece and capacitor battery using negative pole piece
  • Preparation process of long-lived negative pole piece and capacitor battery using negative pole piece
  • Preparation process of long-lived negative pole piece and capacitor battery using negative pole piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The making of positive plate: the LiNi that total amount is 500g 1 / 3 co 1 / 3 mn 1 / 3 o 2 , activated carbon, graphite powder, and PVDF are mixed in a mass ratio of 75:15:5:5, adjusted to a slurry with NMP, and then coated on a 20 μm aluminum foil (the coating weight gain is: 240g / m 2 ), dried (110-120°C), rolled, and cut into pieces (size: 37.5*59.5mm 2 ), 24h vacuum drying (120 ~ 130 ℃) to make a positive sheet.

[0058] The making of negative plate: the hard carbon that total amount is 500g, PVDF are mixed by mass ratio as 90: 10, adjust into slurry with NMP, then coat on the copper foil of 16 μ m (coating gain is: 120g / m 2 ), after drying (110~120℃), rolling (compaction density is 0.96g / cm 3 ), cut pieces (size: 37.5*59.5mm 2 ), 24h vacuum drying (120 ~ 130 ℃) to make negative electrode sheet. Use polyethylene polypropylene three-layer composite microporous membrane as the diaphragm, put the pole piece into the 38*61*32 aluminum shell and laminate it into a batt...

Embodiment 2

[0060] The making of positive plate: the LiNi that total amount is 500g 1 / 3 co 1 / 3 mn 1 / 3 o 2 , activated carbon, graphite powder, and PVDF are mixed in a mass ratio of 75:15:5:5, adjusted into a slurry with NMP, and then coated on a 20 μm aluminum foil (the coating weight gain is: 240g / m 2 ), dried (110-120°C), rolled, and cut into pieces (size: 37.5*59.5mm 2 ), 24h vacuum drying (120 ~ 130 ℃) to make a positive sheet.

[0061] Production of the negative electrode sheet: mix a total amount of 500g of hard carbon and PTFE at a mass ratio of 90:10, make a slurry with deionized water, stir until it becomes a paste, and press it with a roller press to obtain a sheet of a certain thickness Shaped pole piece, the compaction density is 1.35, the conductive agent Super-P is adjusted into a slurry, and then a layer of conductive agent is coated on the negative electrode collector, and finally the pole piece is attached to the negative electrode collector coated with a layer of con...

Embodiment 3

[0063] The making of positive plate: the LiMn that total amount is 500g2 o 4 , activated carbon, graphite powder, and PVDF are mixed in a mass ratio of 75:15:5:5, adjusted to a slurry with NMP, and then coated on a 20 μm aluminum foil (the coating weight gain is: 300g / m 2 ), dried (110-120°C), rolled, and cut into pieces (size: 37.5*59.5mm 2 ), 24h vacuum drying (120 ~ 130 ℃) to make a positive sheet.

[0064] The making of negative plate: the hard carbon that total amount is 500g, PVDF are mixed by mass ratio as 90: 10, adjust into slurry with NMP, then coat on the copper foil of 16 μ m (coating gain is: 120g / m 2 ), after drying (110~120℃), rolling (compaction density is 0.96g / cm 3 ), cut pieces (size: 37.5*59.5mm 2 ), 24h vacuum drying (120 ~ 130 ℃) to make negative electrode sheet. Use polyethylene polypropylene three-layer composite microporous membrane as the diaphragm, put the pole piece into the 38*61*32 aluminum shell and laminate it into a battery cell, with a tig...

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Abstract

The invention relates to a preparation process of a long-lived negative pole piece and a capacitor battery using the negative pole piece. The preparation process of the long-lived negative pole piece comprises the following steps: mixing materials: mixing fast-storage lithium carbon and a binder, and adding a solvent; squeezing, squeezing the mixture by a roll squeezer to obtain a platy pole piece with a certain thickness; coating: mixing a conductive agent into a sizing agent, and coating the sizing agent on a negative current collector body; attaching the piece, squeezing and attaching the platy pole piece on negative current collector body coated with the sizing agent; and drying, grinding, cropping, and vacuum drying to prepare the negative pole piece. The invention adopts the process that the platy pole piece is firstly squeezed and then is attached on the negative current collector body, so that the negative pole piece has higher compaction density and longer cycle life. The organic hybrid super-capacitor battery prepared by the invention has the characteristics of high energy density (which can reach 45-80Wh / Kg) and high power density (which is higher than 4500W / Kg), can bewidely applicable to the fields such as electric vehicles, power tools, solar energy storage, wind energy storage, portable appliances and the like.

Description

technical field [0001] The invention relates to the combination of supercapacitor and lithium-ion battery technology, in particular to organic hybrid supercapacitor and lithium-ion battery. Background technique [0002] Supercapacitor is a new type of electrochemical energy storage device between traditional capacitors and batteries. Compared with traditional capacitors, it has higher energy density, and its electrostatic capacity can reach thousands of farads to 10,000 farads. Compared with batteries, it has higher High power density and long cycle life, so 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 working temperature limit, and maintenance-free. [0003] According to different energy storage principles, supercapacitors can be divided into three categories: electric double layer capacitors (EDLC), Farad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/145H01G9/035
CPCH01G11/38H01M12/005H01M4/0435H01M4/1393H01M4/668Y02T10/7022Y02E60/128Y02E60/13H01G9/058Y02E60/122H01M4/667H01M4/133H01G11/06H01G11/28H01G11/32H01G11/50Y02E60/10Y02T10/70Y10T29/49114
Inventor 华黎杨恩东梁全顺安仲勋吴明霞曹小卫
Owner SHANGHAI AOWEI TECH DEV
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