Energy storage device with both capacitor and lithium ion battery characteristics and manufacturing method thereof

A technology of lithium-ion batteries and manufacturing methods, applied in the field of electrochemistry, can solve the problems of low energy density and unsatisfactory charging and discharging capabilities of supercapacitors, achieve excellent charging and discharging capabilities, cycle stability, good consistency, and improve utilization Effect

Inactive Publication Date: 2008-12-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the lithium-ion battery produced by traditional technology has unsatisfactory charge and discharge capacity at ultra-high rates, and the energy density of the supercapacitor is low, the present invention provides a high specific power charac

Method used

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  • Energy storage device with both capacitor and lithium ion battery characteristics and manufacturing method thereof
  • Energy storage device with both capacitor and lithium ion battery characteristics and manufacturing method thereof
  • Energy storage device with both capacitor and lithium ion battery characteristics and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The positive active material is 50% LiFePO 4 It is mixed with 50% activated carbon, binders, conductive agents, additives, solvents, etc. to prepare a slurry, which is coated, dried, rolled and cut to make a positive electrode sheet for supercapacitor batteries;

[0039] The negative active material is 50% artificial graphite and 50% activated carbon, mixed with binder, conductive agent, additive, solvent, etc. to prepare a slurry, which is coated, dried, rolled and cut to make a super capacitor battery negative electrode piece;

[0040] The assembly of the positive electrode sheet, the negative electrode sheet and the separator is assembled into a small winding core by winding, and 16 winding cores are used to install them into a stainless steel shell with a width, thickness and height of 70mm, 34mm and 65mm respectively. The cores are parallel to the wide side. It is arranged on the side of 34*65, and the change of the ratio of the weight of the positive electrode sh...

Embodiment 2

[0044] The positive active material is 95% LiFePO 4 It is mixed with 5% activated carbon, binders, conductive agents, additives, solvents, etc. to prepare a slurry, which is coated, dried, rolled and cut to make a positive electrode sheet for supercapacitor batteries;

[0045] The negative active material is 95% mesophase carbon microspheres and 5% activated carbon, mixed with binders, conductive agents, additives, solvents, etc. to prepare a slurry, which is coated, dried, rolled and cut to make super Capacitor battery negative plate;

[0046] The positive electrode sheet, the negative electrode sheet and the separator are assembled into a small winding core by winding, and 20 winding cores are used to put them into a stainless steel shell with a width, thickness and height of 70mm, 34mm and 65mm respectively. The cores are parallel to the wide side. It is arranged on the side of 34*65, and the change of the mass ratio of the weight of the positive electrode sheet to the neg...

Embodiment 3

[0050] The positive active material is 20% LiFePO 4 It is mixed with 80% activated carbon, binders, conductive agents, additives, solvents, etc. to prepare a slurry, which is coated, dried, rolled and cut to make a positive electrode sheet for supercapacitor batteries;

[0051] The negative active material is 20% modified natural graphite and 80% activated carbon, mixed with binder, conductive agent, additive, solvent, etc. to prepare a slurry, which is coated, dried, rolled and cut to make a super capacitor battery negative plate;

[0052] The assembly of the positive electrode sheet, the negative electrode sheet and the separator is assembled into a small winding core by winding, and 16 winding cores are used to install them into a stainless steel shell with a width, thickness and height of 70mm, 34mm and 65mm respectively. The cores are parallel to the wide side. It is arranged on the side of 34*65, and the change of the mass ratio of the weight of the positive electrode s...

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Abstract

An energy storage device having both characteristics of super capacitor and lithium ion battery and manufacturing method thereof are provided. The invention adopts the mixture of anode material of lithium ion battery and electrode material of super capacitor or composite material as anode active substance, and uses the mixture of cathode material of the lithium ion battery and electrode material of the super capacitor or composite material as cathode active substance. In the electrode active substance, the electrode material of the lithium ion battery has a content of 20% to 95%; the electrode material of the super capacitor has a content of 5% to 80%. The electrode active substance is mixed with the bonder, conducting agent, additive and solvent etc to prepare slurry, then experience steps of coating, drying, roll forming, parting, so that the anode sheet and cathode sheet of the super capacitance battery are produced. By adopting multi-core winding parallel connection and the assembling technology of the winded wore parallel to the narrow arrangement, the anode sheet, the cathode sheet and the membrane are loaded in the battery shell and then welded, dried, dehydrated, and injected with electrolyte, then activated by electricity to obtain super capacitance battery with high energy density and high power density.

Description

Technical field: [0001] The invention relates to a novel energy storage device, in particular to an energy storage device having the characteristics of a supercapacitor and a lithium ion battery and a manufacturing method thereof, belonging to the field of electrochemistry. Background technique [0002] Energy crisis, resource shortage, and environmental pollution are severe challenges for human survival. Finding clean, renewable, and resource-saving secondary energy is an urgent task to achieve sustainable development of human society. [0003] Lithium-ion batteries have the advantages of high operating voltage, high energy density, long cycle life, low self-discharge rate, and green environmental protection, which have become the development trend of secondary batteries. It has been widely used in the power supply of portable electrical appliances such as wireless communication, digital cameras, notebook computers, etc., and has a wide range of electric power sources for m...

Claims

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Application Information

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IPC IPC(8): H01M10/36H01M10/38H01M10/40H01M4/02
CPCY02E60/10Y02P70/50
Inventor 郭华军李新海王志兴彭文杰胡启阳
Owner CENT SOUTH UNIV
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