CN203134571U

CN203134571U - Thin-type super capacitor

Info

Publication number: CN203134571U
Application number: CN 201220554817
Authority: CN
Inventors: 陈秀珍
Original assignee: HANGZHOU MINGZHANG TECHNOLOGY Co Ltd
Current assignee: HANGZHOU MINGZHANG TECHNOLOGY Co Ltd
Priority date: 2012-10-26
Filing date: 2012-10-26
Publication date: 2013-08-14
Anticipated expiration: 2022-10-26

Abstract

The utility model relates to an energy storage device, in particular to a thin-type super capacitor, which comprises outer packings, positive and negative electrode plates and an isolating membrane which are arranged from the outside to the inside in sequence, wherein the outer packings and the positive and negative electrodes are arranged in pairs, the isolating membrane is arranged between the positive and negative electrode plates which are in pairs, the positive and negative electrode plates comprise active layers and conductive layer which are arranged from the outside to the inside in pairs, as well as current collectors arranged between the conductive layers which are arranged in pairs, and the thickness of the capacitor is less than 1000 microns. Through the thin design of the thin-type super capacitor, the super capacitor can be applied to consumer electronic products without increasing the thickness of such products, at the same time, due to the addition of the super capacitor, the power output can be increased, and the thin-type super capacitor reduces the internal resistance of the super capacitor by adding the conductive layers into the positive and negative electrode plates.

Description

A kind of slim ultracapacitor

Technical field

The utility model relates to a kind of energy storage device, specifically, is a kind of slim ultracapacitor.

Background technology

Ultracapacitor is a kind of novel energy storage device, it can provide high power, per kilogram reaches several kilowatts or tens kilowatts, be tens times of battery, it have the life-span long, serviceability temperature is wide, charging characteristics such as quick, now be widely used in fields such as Aero-Space, electric automobile, motor-car, military affairs, market scale reaches tens dollars.

Along with the fast development of consumer electronics market at last decade, consumer electronics market to the demand of power also in continuous increase, the particularly continuous increase of function such as smart mobile phone, panel computer, super, laptop computer, electric tool, digital camera, the electronic device of these types needs quicker operation speed, better the user experiences and higher performance requirement, and therefore the high power energy storage to the power supply of this electronic product has higher demand.

As everyone knows, the power supply that this electronic product is used now is lithium ion battery, the characteristics of lithium ion battery are that the energy density height is that discharge time is long, but the shortcoming of lithium ion battery is that power density is low, and when high power discharge suddenly, its negative pole is analysed lithium easily and is produced safety issue, therefore only can not satisfy present and following electronic device to the demand of power supply with lithium ion battery.And the characteristics of ultracapacitor are to have high power density, therefore increase ultracapacitor in this class digital product, can satisfy it to the requirement of high power output.But existing ultracapacitor mainly is the column type based on the box hat packing, size is very big, and present developing direction also mainly is that what for example current supercapacitor applications was maximum is the capacitor monomer of 3000F toward the large scale development, it is of a size of: diameter 60.7 mm, high 138 mm.The development trend that this and consumption electronic product are thinner, lighter is inconsistent, and this also is that ultracapacitor is in the considerably less main cause of consumer electronics applications.

The utility model content

The improvement that the utility model is done at the place of the deficiencies in the prior art just, a kind of slim ultracapacitor is provided, demand from consumption electronic product, pass through appropriate design, design slim and high-power ultracapacitor, the above-mentioned technical purpose of this patent is achieved through the following technical solutions:

A kind of slim ultracapacitor, comprise the external packing, positive and negative electrode sheet, the barrier film that from outward appearance to inner essence arrange successively, external packing and positive and negative electrode sheet arrange in pairs, barrier film is arranged between the paired positive and negative electrode sheet, the positive and negative electrode sheet comprises successively active layer, the conductive layer that from outward appearance to inner essence arranges in pairs and is located at collector between the paired conductive layer that the thickness of capacitor is less than 1000 microns.

As further improvement, described conductive layer comprises conductive agent and binding agent, and conductive agent is any one in carbon black, carbon nanotube, Graphene, the Ag powder, and binding agent is any one in polytetrafluoroethylene, poly-inclined to one side tetrafluoroethene, the polyaniline.

As further improvement, described collector comprises metal forming, conductive agent and binding agent.

As further improvement, described active layer comprises electrochemical active material, conduction charcoal and binding agent.

As further improvement, described electrochemical active material is any one in porous carbon materials, metal oxide, the conducting polymer, and the conduction charcoal is any one in carbon black, carbon nanotube, Graphene, the Ag powder.

The beneficial effects of the utility model are as follows:

The technical solution of the utility model designs by slimming, can make supercapacitor applications in consumer electronics product, as smart mobile phone, panel computer, super, laptop computer, electric tool, in the digital camera etc., can't increase simultaneously the thickness of this series products, for example the thickness of ultracapacitor 0.3 ~ 1mm only be mobile phone average thickness 15mm about 2 ~ 6%, therefore the thickness of ultracapacitor is compared substantially and can be ignored with mobile phone thickness, and because the adding of ultracapacitor, can increase power output, and this patent is also by adding the internal resistance that conductive layer reduces ultracapacitor in the positive and negative electrode sheet.

Description of drawings

Fig. 1 is the structural representation of the slim ultracapacitor of the utility model;

Among the figure, the 1st, external packing, the 2nd, active layer, the 3rd, conductive layer, the 4th, collector, the 5th, barrier film.

Embodiment

Below in conjunction with Figure of description the technical solution of the utility model is described further:

The utility model discloses a kind of slim ultracapacitor, comprise the external packing 1, positive and negative electrode sheet, the barrier film 5 that from outward appearance to inner essence arrange successively, external packing 1 and positive and negative electrode sheet arrange in pairs, barrier film 5 is arranged between the paired positive and negative electrode sheet, the positive and negative electrode sheet comprises successively active layer 2, the conductive layer 3 that from outward appearance to inner essence arranges in pairs and is located at collector 4 between the paired conductive layer 3 that the thickness of capacitor is less than 1000 microns.

The effect of collector 4 is to collect electronics, and mainly by metal forming, conductive agent and binding agent constitute, and conductive agent is that carbon black, carbon nanotube, Graphene, Ag powder etc. have the electron conduction material, and binding agent is polytetrafluoroethylene, poly-inclined to one side tetrafluoroethene, polyaniline etc.; Active layer 2 is made of electrochemical active material, conduction charcoal and binding agent, wherein conductive agent is that carbon black, carbon nanotube, Graphene, Ag powder etc. have the electron conduction material, binding agent is polytetrafluoroethylene, poly-inclined to one side tetrafluoroethene, polyaniline etc., and electrochemical active material is porous carbon materials, metal oxide such as ruthenium-oxide, manganese dioxide, vanadium oxide etc., conducting polymer such as polyaniline, polythiophene etc.; Conductive layer 3 is made of conductive agent and binding agent, and conductive agent is that carbon black, carbon nanotube, Graphene, Ag powder etc. have the electron conduction material, and binding agent is polytetrafluoroethylene, poly-inclined to one side tetrafluoroethene, polyaniline etc.

Execution mode is as follows:

40% carbon black and 60% poly-inclined to one side tetrafluoroethene (PVDF) are mixed into certain slurry in a certain amount of N-methyl pyrrolidone (NMP), this slurry coating on the Al of 16 micron thickness paper tinsel, positive and negative applies respectively, and THICKNESS CONTROL is at 5 microns, the oven dry back conductive layer 3.80% activated carbon, 10% carbon black and 10% PVDF are mixed into slurry in NMP, are coated on then on the conductive layer 3, THICKNESS CONTROL is electrode slice at 25 microns after the oven dry.Electrode slice is cut into the size that width and length are respectively 22 mm and 25mm, is thickness that 100 microns Ni collection ears are soldered on the electrode slice again.

Be positive plate, barrier film 5(thickness 25 microns) and negative plate be hot-pressed onto together by the structure of Fig. 1, after put into external packing 1 aluminum plastic film (thickness is 120 microns), under anhydrous condition, inject electrolyte, electrolyte is 1 mol/L Et ₄BF ₄/ carbonic allyl ester solution, the sealed aluminum plastic film can make slim ultracapacitor then.

Because the utility model change structurally, add conductive layer 3 and can be reduced to 30m Ω to the internal resistance of ultracapacitor from 60 m Ω, its power density reaches 6.7 kw/Kg, and because the thickness of this ultracapacitor only is 0.4 mm, therefore can directly put into mobile phone or digital camera, improve the usefulness of mobile phone or flash lamp of digital camera.

This shows that the utility model is simple in structure, process implementing is convenient, and of many uses.

Above-described only is preferred implementation of the present utility model; should be understood that; for those of ordinary skill in the art; under the prerequisite that does not break away from the utility model core technology feature; can also make some improvements and modifications, these improvements and modifications all should be considered as protection range of the present utility model.

Claims

1. slim ultracapacitor, comprise the external packing (1), positive and negative electrode sheet, the barrier film (5) that from outward appearance to inner essence arrange successively, described external packing (1) and positive and negative electrode sheet arrange in pairs, described barrier film (5) is arranged between the paired positive and negative electrode sheet, it is characterized in that, described positive and negative electrode sheet comprises successively active layer (2), the conductive layer (3) that from outward appearance to inner essence arranges in pairs and is located at collector (4) between the paired conductive layer (3) that the thickness of described capacitor is less than 1000 microns.

2. slim ultracapacitor according to claim 1, it is characterized in that, described electrochemical active material is any one in porous carbon materials, metal oxide, the conducting polymer, and described conduction charcoal is any one in carbon black, carbon nanotube, Graphene, the silver powder.