CN102544632A - Anti-blocking lithium air battery - Google Patents
Anti-blocking lithium air battery Download PDFInfo
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- CN102544632A CN102544632A CN2010105755508A CN201010575550A CN102544632A CN 102544632 A CN102544632 A CN 102544632A CN 2010105755508 A CN2010105755508 A CN 2010105755508A CN 201010575550 A CN201010575550 A CN 201010575550A CN 102544632 A CN102544632 A CN 102544632A
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- air
- lithium
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- air electrode
- electrode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to an anti-blocking lithium air battery, comprising a metal lithium cathode, electrolyte and an air electrode anode, which are capsulated in a battery shell, wherein an anode lug and a cathode lug are reserved outside the battery shell. The anti-blocking lithium air battery is characterized in that: an air reaction layer of the air electrode is compounded with one layer or more than one layer of an air transmission layer formed by a porous insulating thin film material. The air electrode in the battery provided by the invention adopts the air transmission layer formed by the porous insulating thin film material so that the air can be transmitted in three-dimensional directions; under the condition of increasing the thickness of the air electrode, the air can smoothly enter into one side of the air electrode, which is close to the lithium electrode, thereby avoiding the invalidation of the air electrode caused by blocking one side of the air electrode, which faces to the air; and the air electrode has a high-energy density and high service life and the performance of the air electrode under large-current work is improved simultaneously, thereby finally improving the capacity and the current density of the lithium air battery.
Description
Technical field
The invention belongs to the lithium-air battery technical field, particularly relate to a kind of anti-blocking lithium-air battery.
Background technology
Lithium-air battery be with lithium metal as negative pole, air electrode is anodal high-specific energy battery, it estimates that attainable specific energy is more than the 1000Wh/kg, is high-energy battery of new generation.
At present, can be divided into aqueous systems lithium-air battery and organic system (being non-aqueous system) lithium-air battery to the research of lithium-air battery according to the difference of employing electrolyte.Wherein the organic system lithium-air battery because preparation is simple, fail safe is higher, obtains research widely.In the preparation of air electrode, have higher capacity, higher working current density in order to make air cell, jumbo air electrode will be arranged, then to strengthen the thickness of air electrode.
But find that in the research of organic system lithium-air battery along with the increase of air electrode thickness, the situation that descends has gradually appearred in the specific energy of air electrode and cycle performance.This mainly is because product is preferentially piled up in air one side in thicker air electrode; The raising of finding air electrode current density simultaneously can aggravate the obstruction of product in the air electrode air side; Causing air electrode to be sidelong capacitance towards one of negative pole can not give full play to; Make and the decreased performance of air electrode or lost efficacy in advance and influence the specific energy and the cycle life of air electrode finally influence the useful life of battery.
Summary of the invention
The objective of the invention is to overcome the weak point of prior art; A kind of anti-blocking lithium-air battery is provided; It is clog-free when big that this battery has air electrode thickness and capacity, and battery capacity and working current density are high, and the characteristics of specific energy and cycle performance height, long service life.
A kind of anti-blocking lithium-air battery of the present invention adopts following technical scheme:
A kind of anti-blocking lithium-air battery; Comprise that the lithium anode, electrolyte and the air electrode that are packaged in the battery container are anodal; Battery container leaves positive pole ear and negative lug outward, it is characterized in that: be compounded with the air transfer layer that the above insulating properties porous film material of individual layer or individual layer constitutes on the air reaction layer of said air electrode.
And said battery container is positioned at air electrode and leaves window away from a side of lithium metal.
And said insulating properties porous film material is non-woven polypropylene felt or glass fibre membrane.
And the thickness in monolayer of said insulating properties porous film material is 5 μ m-500 μ m, and the thickness of air reaction layer is 10 μ m-2000 μ m.
And said air electrode is rolled, laminated or tabs shape structure.
Advantage that the present invention has and good effect:
Air electrode in the anti-blocking lithium-air battery of the present invention has adopted the air transfer layer of porous membrane insulating material; Air all can transmit on three-dimensional; Strengthening under the air electrode thickness situation; Air can enter into the side that air electrode and lithium electrode are pressed close to smoothly, has avoided because of air electrode causes the inefficacy of air electrode towards the obstruction of air one side, and air electrode has high-energy-density and in high useful life; Improve the performance of air electrode under big current work again, finally improved lithium-air battery capacity, current density and useful life.
Description of drawings
Fig. 1 is the section structure sketch map of anti-blocking lithium-air battery air electrode of the present invention;
Fig. 2 is the electrode rolled section structure sketch map of Fig. 1;
Fig. 3 is the electrode laminated section structure sketch map of Fig. 1;
Fig. 4 is the electrode tabs shape section structure sketch map of Fig. 1;
Fig. 5 is the structural representation that Fig. 2 electrode preparation becomes lithium-air battery;
Fig. 6 is the thick specific energy that is prepared into test battery behind the lithium-air battery of Fig. 2 electrode 1cm figure as a result.
Wherein, 1-collector, 2-air reaction layer, 3-air transfer layer, 4-negative lug, 5-air electrode, 6-electrolyte, 7-lithium anode, 8-positive pole ear, 9-window, 10-battery container.
Embodiment
Below in conjunction with accompanying drawing and through specific embodiment the present invention is made further detailed description, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
Anti-blocking lithium-air battery of the present invention; Comprise the lithium air electrode; The lithium air electrode comprises that collector, thickness are the air reaction layer of 10 μ m-2000 μ m, is compounded with the air transfer layer on the air reaction layer, said air transfer layer be individual layer or two-layer more than overlapping insulating properties porous film material; It is non-woven polypropylene felt or the glass fibre membrane of 5 μ m-500 μ m that the insulating properties porous film material adopts thickness in monolayer; These porous film materials all have good air transfer performance on three-dimensional, air all can be transmitted on three-dimensional, guarantee that air gets into and be transferred to the side of air electrode towards lithium electrode freely; To increase the thickness of air diffusion layer, improve the transmission speed of air in the air transfer layer.If but air diffusion layer has conductivity, electrode reaction then might take place in diffusion layer, and product will be blocked air diffusion layer gradually, cause the air diffusion layer decreased performance, therefore selects the insulating properties porous film material for use.The air electrode of processing can be rolled, laminated or tabs shape structure.
Embodiment 1: with reference to accompanying drawing 1-Fig. 4.
The making of anti-blocking lithium-air battery
1, the making of lithium air electrode:
With thickness is that the non-woven polypropylene felt of 20um is as air transfer layer 3; With 30%-90% Delanium, 5%-50% ptfe emulsion is after adhesive, 0%-50% manganese dioxide-catalyst mix; Roll-in to thickness is the even lamella of 0.1mm-3mm being heated on 40 ℃-80 ℃ the roll squeezer repeatedly, prepares air reaction layer 2; With aperture 10 orders-100 purpose aluminium net, titanium net or iron net is collector 1; Successively collector, air reaction layer and air transfer layer are put together from bottom to top; Apply 10-1000Pa pressure with hot press and be hot pressed into one, prepare anti-blocking lithium air electrode shown in Figure 1.
According to the needs of lithium-air battery, can be with air electrode shown in Figure 1, be axle with a side of electrode, electrode is wound as rolled air electrode shown in Figure 2; Perhaps multi-disc air electrode shown in Figure 1 is carried out range upon range ofly, process laminated air electrode shown in Figure 3; Can also keep a side to have collector to reserve with air electrode shown in Figure 1 with the zigzag folding mode, process tabs shape air electrode shown in Figure 4.
2, the making of anti-blocking lithium-air battery of the present invention:
Under dry air or ar gas environment; Thickness is 0.05mm-3mm and has the copper mesh collector and the lithium metal of negative lug 87 is that the rolled air electrode 5 of 1cm is packaged in the battery container 10 for positive pole, barrier film, electrolyte 6 for negative pole, width shown in Figure 2; Be welded with positive pole ear 4 on the collector of air electrode; Be positioned on the battery container of air electrode away from lithium metal one side and leave window 9; Positive pole ear and negative lug are stayed outside housing, promptly accomplish anti-blocking lithium-air battery shown in Figure 5 and make.
The volume test of air cell of the present invention
With Arbin type battery charging and discharging equipment battery capacity of the present invention is tested, investigate the variation of voltage and current in the battery operated process.Fig. 6 is the test specific energy figure as a result of battery of the present invention.Test result according to Fig. 6 shows is found out; Adopt the air transfer layer of insulating properties porous film material; At air electrode thickness is under the 1cm condition, surpasses 500mAh with respect to the air electrode capacity of lithium metal battery unit are, and air electrode embodies very high specific energy.Explanation does not have to occur because the battery failure phenomenon that air electrode is caused towards air one side cause clogging in the process of long-term discharge yet.Owing to possess unimpeded air transfer layer, air cell of the present invention finally improves lithium-air battery capacity and current density having high-energy-density and in high useful life, also having better current capability.
Claims (5)
1. anti-blocking lithium-air battery; Comprise that the lithium anode, electrolyte and the air electrode that are packaged in the battery container are anodal; Battery container leaves positive pole ear and negative lug outward, it is characterized in that: be compounded with the air transfer layer that the above insulating properties porous film material of individual layer or individual layer constitutes on the air reaction layer of said air electrode.
2. anti-blocking lithium-air battery according to claim 1 is characterized in that: said battery container is positioned at air electrode and leaves window away from a side of lithium metal.
3. anti-blocking lithium-air battery according to claim 1 is characterized in that: said insulating properties porous film material is non-woven polypropylene felt or glass fibre membrane.
4. anti-blocking lithium-air battery according to claim 1 is characterized in that: the thickness in monolayer of said insulating properties porous film material is 5 μ m-500 μ m, and the thickness of air reaction layer is 10 μ m-2000 μ m.
5. anti-blocking lithium-air battery according to claim 1 is characterized in that: said air electrode is rolled, laminated or tabs shape structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105755508A CN102544632A (en) | 2010-12-07 | 2010-12-07 | Anti-blocking lithium air battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105755508A CN102544632A (en) | 2010-12-07 | 2010-12-07 | Anti-blocking lithium air battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102544632A true CN102544632A (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105755508A Pending CN102544632A (en) | 2010-12-07 | 2010-12-07 | Anti-blocking lithium air battery |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0110191A2 (en) * | 1982-12-06 | 1984-06-13 | Lummus Crest S.à.r.l. | A trimetal pulverizer roll and a method of manufacture thereof |
| CN1031158A (en) * | 1987-07-06 | 1989-02-15 | 艾尔坎国际有限公司 | Air cathode and material thereof |
| CN1378708A (en) * | 1999-10-08 | 2002-11-06 | 瑞威欧公司 | Electrochemical electrode for fuel cell |
-
2010
- 2010-12-07 CN CN2010105755508A patent/CN102544632A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0110191A2 (en) * | 1982-12-06 | 1984-06-13 | Lummus Crest S.à.r.l. | A trimetal pulverizer roll and a method of manufacture thereof |
| CN1031158A (en) * | 1987-07-06 | 1989-02-15 | 艾尔坎国际有限公司 | Air cathode and material thereof |
| CN1378708A (en) * | 1999-10-08 | 2002-11-06 | 瑞威欧公司 | Electrochemical electrode for fuel cell |
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Application publication date: 20120704 |