Energy storage device combining with characteristics of lithium ion battery and super-capacitor

A technology for lithium-ion batteries and super capacitors, applied in battery electrodes, electrical components, secondary batteries, etc., can solve the problems that the battery power density cannot reach the super capacitor, increase the complexity of the system, and cannot give full play to the advantages, and achieve the power density. Large, wide source of raw materials, long cycle life effect

Active Publication Date: 2012-08-29
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Due to the fact that supercapacitors rely on the adsorption and aggregation of porous materials for energy storage, their energy density is low, which limits their large-scale application.
For batteries, due to the chemical reaction of electrode materials, the power density of batteries cannot reach the level of supercapacitors; the composite power supply formed by external matching of batteries and supercapacitors increases the complexity of the system, and the advantages of the two cannot be fully utilized

Method used

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  • Energy storage device combining with characteristics of lithium ion battery and super-capacitor
  • Energy storage device combining with characteristics of lithium ion battery and super-capacitor
  • Energy storage device combining with characteristics of lithium ion battery and super-capacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Weigh lithium titanyl oxide, graphene and expanded graphite according to the mass composition ratio of 99:0.5:0.5, mix expanded graphite and lithium titanium oxide in NMP for 2 hours, add the NMP solution of graphene, mix for 4 hours, remove the solvent, and prepare The negative electrode active material is coated on the aluminum foil according to the mass ratio of the negative electrode active material, acetylene black, and polyvinylidene fluoride at 80:15:5, cut and dried as the negative electrode sheet.

[0027] Carbonize the cleaned and impurity-removed rice hulls in a nitrogen atmosphere at 380°C for 2 hours, immerse in 2M potassium hydroxide solution and stir for 6 hours, wash with deionized water, and dry; then mix according to the alkali-carbon ratio of 3:1 Potassium hydroxide and carbonized rice husks were left to stand for 12 hours, activated at 700°C for 2 hours, washed with deionized water, and dried to obtain rice husk-based activated carbon; according to th...

Embodiment 2

[0030] Lithium titania, graphene and expanded graphite are ball milled and mixed according to the mass composition ratio of 98:1:1 to make negative electrode active materials, which are coated on the On the aluminum foil, cut, dry, and coat the other side, as the negative electrode piece, connect the tab.

[0031] Carbonize the washed and crushed apricot husks in a nitrogen atmosphere at 400°C for 2 hours, then mix potassium hydroxide and carbonized rice husks according to the alkali-carbon ratio of 3:1, let them stand for 12 hours, and then activate them at 750°C for 1 hour , washed with deionized water, and dried to obtain apricot shell-based activated carbon.

[0032] According to the mass ratio of activated carbon, conductive carbon black and polyvinylidene fluoride 80:15:5, it is coated on aluminum foil, cut, dried, and coated on the other side, as the positive pole piece, connected to the tab, and the positive and negative pole pieces are loaded with activity The materi...

Embodiment 3

[0035] Weigh lithium carbonate, titanium dioxide, graphene and expanded graphite (lithium carbonate and titanium dioxide product lithium titanium oxide:graphene:expanded graphite mass composition ratio 90:5:5 in the product), ball mill and mix evenly, and calcined at 750°C for 4h in a nitrogen atmosphere , to make the negative electrode active material; according to the mass ratio of the negative electrode active material, carbon nanofiber and polyvinylidene fluoride of 85:10:5, it is coated on the aluminum foil, cut and dried as the negative electrode sheet.

[0036] Carbonize the cleaned and pulverized straw in a nitrogen atmosphere at 300°C for 1 hour, then mix potassium hydroxide and carbonized straw according to the alkali-carbon ratio of 3:1, let it stand for 12 hours, activate it at 700°C for 1 hour, and remove Washing with deionized water and drying to obtain straw-based activated carbon.

[0037] According to the mass ratio of activated carbon, conductive carbon black...

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Abstract

The invention relates to an energy storage device combining with characteristics of a lithium ion battery and a super-capacitor, which comprises a positive pole, a negative electrode, a diaphragm, electrolyte and a shell, wherein the positive pole and the negative electrode are respectively formed in a way that an active substance, a conductive additive and a binder are respectively coated on a current collector, wherein the positive pole active substance is a biomass activated carbon material which can perform ion reversible adsorption, and the negative electrode active substance is a lithium-titanium-oxygen compound which can perform lithium-ion reversible de-intercalation. The energy storage device combining with the characteristics of the lithium ion battery and the super-capacitor is formed as follows: the activated carbon material with the double-electrode-layer energy storage characteristic of the super-capacitor is combined with the lithium-titanium-oxygen compound with a de-intercalation lithium energy storage characteristic of the lithium ion battery, wherein the materials used in the forming process of the energy storage device are mature materials which are widely applied to energy storage devices, and the materials are environment-friendly, rich in resource, and relatively low in cost.

Description

technical field [0001] The invention relates to an energy storage device having the characteristics of a lithium ion battery and a supercapacitor, and belongs to the technical field of batteries and supercapacitors. Background technique [0002] The continuous development of new energy vehicles has promoted the continuous improvement of chemical power supply technologies such as lead-acid batteries, nickel-metal hydride batteries, lithium-ion batteries, fuel cells, super capacitors, metal-air batteries, and zinc-ion batteries. A single power system is difficult to meet the requirements of use. Combining energy storage devices with different energy and power characteristics can greatly improve the efficiency of the device and prolong the service life while meeting the requirements of use. For example, a lithium-ion battery and a supercapacitor are combined to form a composite power source. As the power source of a car, the supercapacitor can work in high-power output conditi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M4/587H01M4/485H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 荣常如韩金磊张克金曹婷婷林海波闻斌
Owner CHINA FIRST AUTOMOBILE
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