CN205582739U

CN205582739U - Electricity chemical power source electrode based on three -dimensional three -dimensional protruding mass flow body

Info

Publication number: CN205582739U
Application number: CN201620154013.9U
Authority: CN
Inventors: 薛龙均
Original assignee: Dongyang Yuanjiang Electrical Co Ltd
Current assignee: Dongyang Yuanjiang Electrical Co Ltd
Priority date: 2016-03-01
Filing date: 2016-03-01
Publication date: 2016-09-14
Anticipated expiration: 2026-03-01

Abstract

The utility model relates to an electricity chemical power source electrode based on three -dimensional three -dimensional protruding mass flow body is by active material layer (1) and the compound constitution of the mass flow body (2). The mass flow body (2) surface has three -dimensional protruding (3), the protruding both ends open -ended hollow structure that is, the opening of protruding bottom is connected with the mass flow body is open to form hole (4) run through on the mass flow body, it is protruding at mass flow body both sides friendship misalignment cloth. Three -dimensional three -dimensional protruding structure has increased active material layer and collection fluidic cohesion, has increased the electrode density, and the improvement capacity reduces the internal resistance, has lengthened electric chemical power source's life.

Description

A kind of electrochemical power source electrode based on 3 D stereo projection collector

Technical field

This utility model relates to electrochemical field, specifically, this utility model relates to a kind of electrochemical power source electrode based on 3 D stereo projection collector, this electrode can be applicable to multiple electrochemical power source, including ultracapacitor, lithium-ion capacitor, mixed capacitor, fuel cell and lithium ion battery.

Background technology

Electrochemical power source is a kind of energy storage and release device, it carries out the conversion of energy by the way of physically or chemically, energy source and power is provided for various electricity consumption facilities, relate to the many aspects of social life, there is portability and ease of use, be widely used in the fields such as electronic product, electric tool, wind energy, solar energy, automobile, aviation.This electrochemical power source includes ultracapacitor, lithium-ion capacitor, mixed capacitor, fuel cell and lithium ion battery etc..

Electrode is the core parts of electrochemical power source, is the key factor affecting electrochemical power source performance.Electrode is composited by active material layer and collector.Active material layer includes active substance, conductive agent and binding agent, and wherein active substance is the main material of electrode, is used for providing capacity；Conductive agent is for improving the electric conductivity of electrode；Binding agent is for being bonded together active substance, conductive agent and collector, and collector is used for supporting active material layer and providing electron transfer passage.

Prior art is typically all active material layer to be compounded on ganoid collector makes electrode, there is following defect in this technology: 1, active material layer is inadequate with the adhesion strength of collector, prolongation with the time of use, charge and discharge cycles increased frequency, amount of activated material can come off from collector, affects electrode performance and life-span；2, collector is that surface contacts with active substance, and contact area is limited, and internal resistance is bigger than normal；3, when electrode is assembled into electrochemical power source, need electrode roll around or be superimposed as contacting pole group more closely, when will result in fluid injection, electrolyte is difficult to penetrate into inside the group of pole, along with the carrying out of charge and discharge cycles, electrode interior electrolyte is deficient, causes electrochemical power source performance to reduce or damages；4, in prior art, for solving active substance and collector adhesion strength and internal resistance problem, some technique is to be situated between to be re-introduced into one layer of conducting resinl, but the introducing of conducting resinl adds manufacturing process and the cost such as material, equipment, and increases the chance introducing impurity；5, in prior art, some technique be produced by physically or chemically means on a current collector run through or not through hole, the problems referred to above are had certain improvement, but effect are not the most obvious.

Utility model content

In order to solve the deficiencies in the prior art, the purpose of this utility model is to provide a kind of electrochemical power source electrode based on 3 D stereo projection collector, its active material layer is strong with collector adhesion, electrode density is big, capacity is high, internal resistance is low, has extended cycle life, and can preferably be applied to the fields such as ultracapacitor, lithium-ion capacitor, mixed capacitor, fuel cell and lithium ion battery.

This utility model is accomplished by: a kind of electrochemical power source electrode based on 3 D stereo projection collector, is constituted by active material layer and collector are compound.Described collection liquid surface has 3 D stereo protruding；Described projection is the hollow structure of both ends open；The opening of described bump bottom ends is open with collector to be connected, and forms the hole run through on a current collector；Described projection is staggered in collector both sides.

As preferably, it is 10-80% that the area of described hole accounts for the ratio of collector area.On collector, the existence of hole is beneficial to the rapid osmotic of electrolyte during fluid injection, and can make electrolyte well into electrode group inside, prevent with charge and discharge cycles carry out and the electrolyte scarcity phenomenon that occurs.Pore structure can also alleviate the quality of collector, thus alleviates lightness and the miniaturization of electrochemical power source quality, beneficially electrochemical power source.

As preferably, the centre-to-centre spacing between described hole is 0.05-1mm.The active substance being positioned at the upper and lower both sides of collector can reduce internal resistance by open protruding realization directly contact, beneficially ionic conduction.

As preferably, described projection is perpendicular to the 5%-50% that height is active substance layer thickness of collection liquid surface.The amount of activated material of compound tense enters protruding hollow space, increases active substance and collector contact area, increases electrode density, and improves adhesion, extends electrode life, reduces consumption of binder, reduces internal resistance.

This utility model technology is applicable to the electrochemical power sources such as ultracapacitor, lithium-ion capacitor, mixed capacitor, fuel cell and lithium ion battery.It should be noted that this utility model technology is particularly suited for lithium-ion capacitor.Its collector of technological requirement of the pre-embedding lithium of lithium-ion capacitor must have through hole to provide migrating channels to lithium ion, prior art is all that collector additional processing is formed through hole, and the lithium ion of this utility model technology can directly be transmitted by the hollow part that 3 D stereo projection is open, complete pre-embedding lithium.

The beneficial effects of the utility model: improve active material layer and the adhesion of collector, extend electrochemical power source service life；Increase the active substance quality of unit are, increase electrode density, improve capacity, energization density；Reduce consumption of binder, reduce internal resistance, improve power density；Alleviate collector quality, reduce electrochemical power source quality or volume；Reduce power module quantity or volume, beneficially power module lightness and miniaturization, reduce cost；It is beneficial to electrolyte and rapidly permeates into electrode interior, prevent electrolyte deficient；This utility model technology is particularly suited for lithium-ion capacitor.

Accompanying drawing explanation

Fig. 1 is a kind of electrochemical power source electrode sectional structure schematic diagram based on 3 D stereo projection collector of the present utility model；

Fig. 2 is the sectional structure schematic diagram of prior art electrode.

In figure；1, active material layer, 2, collector, 3, protruding, 4, hole, 5, common collector.

Detailed description of the invention

Below in conjunction with specification drawings and specific embodiments, substantive distinguishing features of the present utility model is further described.

A kind of based on 3 D stereo projection collector electrochemical power source electrode as shown in Figure 1, is combined is constituted by active material layer 1 and collector 2.There is 3 D stereo projection 3 on described collector 2 surface；Described projection is the hollow structure of both ends open；The opening of described bump bottom ends is open with collector to be connected, and forms the hole 4 run through on a current collector；Described projection is staggered in collector both sides.Described projection is the cube of hollow, can regular or irregular shape, can illustrate such as mountain peak shape, threadiness etc..Described protruding both ends open can be rule and irregular various geometries, can illustrate as circular, oval etc..

Fig. 2 is the sectional structure schematic diagram of prior art electrode.Common collector is ganoid slab construction.Comparison diagram 1 and Fig. 2, it is obvious that the electrode of this utility model technology, active substance can enter inside the hollow bumps on collector, increases the active substance of unit are, increases electrode density, improves capacity and energy density.And the active substance being positioned at the upper and lower both sides of collector directly can be contacted by the two ends that projection is open, the beneficially conduction of ion, reduces internal resistance.

The area of described hole accounts for the ratio of collector area and is preferably 10-80%.On collector, the existence of hole is beneficial to note increases unit are active substance quality, and electrolyte can be made quickly well into electrode interior.Meanwhile, pore structure can also alleviate the quality of collector, thus alleviates lightness and the miniaturization of electrochemical power source quality, beneficially electrochemical power source.

Described projection is perpendicular to the highly preferred 5%-50% for active substance layer thickness of collection liquid surface, and concrete height number is preferably 5-80um.The concrete numerical value of height can adjust according to practical condition and determine, is regarded as specific embodiment of the utility model.

A kind of electrochemical power source electrode based on 3 D stereo projection collector of the present utility model is applicable to field of electrochemical power source, the field such as including ultracapacitor, lithium-ion capacitor, mixed capacitor, fuel cell and lithium ion battery.The technical solution of the utility model is particularly suited for lithium-ion capacitor field.Lithium-ion capacitor is due to the particular/special requirement of its pre-embedding lithium technique, need to load in advance lithium sheet in group side, pole when assembling, then lithium ion collector to be passed embeds in every layer of active substance, and this just requires collector must have through hole thus provides migrating channels for lithium ion.Prior art is all that collector additional processing is formed through hole, and the lithium ion of this utility model technology can directly be transmitted by the hollow part that 3 D stereo projection is open, it is not necessary to additional processing can complete pre-embedding lithium.

This utility model is not limited to above-mentioned embodiment, but can carry out various improvement in the range of this utility model as claimed in claim.These improvement are included within the scope of this utility model.

Embodiment

Embodiment 1

Activated carbon and conductive carbon black and politef mix and blend, be pressed into the carbon film of thickness 100um.Collector uses porosity to be 80%, and aperture center is away from for 0.05mm, and thickness is the aluminium foil of 20um, and protruding vertical height is 50um.Carbon film is pressed on aluminium foil by chaser, obtains activated carbon electrodes.

Embodiment 2

Lithium titanate is mixed to join in methyl pyrrolidone solvent stirs into slurry with conductive carbon black and Kynoar.Collector uses porosity to be 50%, and aperture center is away from for 1mm, and thickness is the Copper Foil of 8um, and protruding vertical height is 20um.Slurry is coated on Copper Foil, obtains the lithium titanate electrode that active substance layer thickness is 80um.

Embodiment 3

Graphene is mixed to form uniform granulate mixture with conductive black and acrylic resin.Collector uses porosity to be 60%, and aperture center is away from for 0.4mm, and thickness is the nickel foil of 30um, and protruding vertical height is 16um.Granulate mixture is sprayed on nickel foil by electrostatic interaction, forms the Graphene electrodes that active substance layer thickness is 160um.

Embodiment 4

Graphite, conductive agent, polyvinylpyrrolidone are mixed to join in water and stir into slurry.Collector uses porosity to be 10%, and aperture center is away from for 0.8mm, and thickness is the aluminium foil of 15um, and protruding vertical height is 5um.Slurry printing is shifted on aluminium foil, obtains the graphite electrode that active substance layer thickness is 20um.

Embodiment 5

Activated carbon and conductive carbon black and politef mix and blend, be first pressed into the carbon film of thickness 200um.Collector uses porosity to be 80%, and aperture center is away from for 0.1mm, and thickness is the rustless steel of 30um, and protruding vertical height is 10um.In advance at the intermediate layer that stainless steel surfaces coating 5um is thick.Then carbon film is heat sealing on the aluminium foil scribbling intermediate layer by the high-temperature roller of 210 DEG C, obtains activated carbon electrodes.

Claims

1. an electrochemical power source electrode based on 3 D stereo projection collector, is constituted by active material layer (1) and collector (2) are compound, and described collector (2) surface has 3 D stereo protruding (3)；Described projection is the hollow structure of both ends open；The opening of described bump bottom ends is open with collector to be connected, and forms the hole (4) run through on a current collector；Described projection is staggered in collector both sides.

A kind of electrochemical power source electrode based on 3 D stereo projection collector, it is characterized in that the area of described hole accounts for the ratio of collector area is 10-80%.

A kind of electrochemical power source electrode based on 3 D stereo projection collector, is characterized in that the centre-to-centre spacing between described hole is 0.05-1mm.

A kind of electrochemical power source electrode based on 3 D stereo projection collector, is characterized in that described projection is perpendicular to the 5%-50% that height is active substance layer thickness of collection liquid surface.