CN102569822A - Anti-blocking air electrode for Li-air battery - Google Patents
Anti-blocking air electrode for Li-air battery Download PDFInfo
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- CN102569822A CN102569822A CN2010105755476A CN201010575547A CN102569822A CN 102569822 A CN102569822 A CN 102569822A CN 2010105755476 A CN2010105755476 A CN 2010105755476A CN 201010575547 A CN201010575547 A CN 201010575547A CN 102569822 A CN102569822 A CN 102569822A
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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
- Y02E60/30—Hydrogen technology
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Abstract
The invention relates to an anti-blocking air electrode for a Li-air battery, comprising a current collector and an air reaction layer, wherein an air transport layer is compounded on the air reaction layer, and the air transport layer is a single layer or more than overlapped two layers of insulating porous thin-film materials. According to the invention, by using the air transport layer made from insulating porous thin-film materials, air can be transported in three dimensional direction, air can smoothly enter the side which belongs to the air electrode and is positioned adjacently to the lithium electrode under the condition of increasing the thickness of the air electrode, thus the failure of the air electrode caused by the blocking of the side towards to the air of the air electrode is avoided, the air electrode has high specific energy and high usage life, and simultaneously the performance of the air electrode in heavy current is raised, and finally the capacity and current density of the Li-air battery are raised.
Description
Technical field
The invention belongs to the lithium-air battery technical field, particularly relate to a kind of lithium-air battery and use the anti-blocking air electrode.
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, and makes the decreased performance of air electrode or lost efficacy in advance and influence the specific energy and the cycle life of air electrode.
Summary of the invention
The objective of the invention is to overcome the weak point of prior art; Provide a kind of lithium-air battery to use the anti-blocking air electrode; It is clog-free when big that this air electrode has air electrode thickness and capacity; Lithium-air battery capacity of processing and working current density are high, and the specific energy of air electrode and the high characteristics of cycle performance.
Lithium-air battery of the present invention adopts following technical scheme with the anti-blocking air electrode:
Lithium-air battery is used the anti-blocking air electrode, comprises collector, air reaction layer, it is characterized in that: be compounded with the air transfer layer on the said air reaction layer, said air transfer layer be individual layer or two-layer more than overlapping insulating properties porous film material.
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 of the present invention is owing to 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 and current density.
Description of drawings
Fig. 1 is that lithium-air battery of the present invention is with anti-blocking air electrode section structure sketch map;
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 specific energy figure as a result of the lithium-air battery of air electrode of the present invention preparation.
Wherein, 1-collector, 2-air reaction layer, 3-air transfer layer.
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.
Lithium-air battery of the present invention is used the anti-blocking air electrode; Comprise that collector, thickness are the air reaction layer of 10 μ m-2000 μ m; Be 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,, improve the transmission speed of air in the air transfer layer to increase the thickness of air diffusion 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.
Lithium-air battery is with the making of anti-blocking 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; Use hot press, 10-1000Pa is hot pressed into one, prepares lithium-air battery shown in Figure 1 and uses the anti-blocking air electrode.
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.
The present invention is prepared into the volume test of lithium-air battery
To the volume test that the present invention is prepared into lithium-air battery, investigate the variation of voltage and current in the battery operated process with Arbin type battery charging and discharging equipment.Fig. 5 is the specific energy figure as a result of the lithium-air battery of air electrode of the present invention preparation.Test result according to Fig. 5 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 cell capacity of metal lithium electrode 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 electrode 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 (4)
1. lithium-air battery is used the anti-blocking air electrode, comprises collector, air reaction layer, it is characterized in that: be compounded with the air transfer layer on the said air reaction layer, said air transfer layer be individual layer or two-layer more than overlapping insulating properties porous film material.
2. lithium-air battery according to claim 1 is used the anti-blocking air electrode, it is characterized in that: said insulating properties porous film material is non-woven polypropylene felt or glass fibre membrane.
3. lithium-air battery according to claim 2 is used the anti-blocking air electrode, it 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.
4. lithium-air battery according to claim 1 is used the anti-blocking air electrode, it is characterized in that: said air electrode is rolled, laminated or tabs shape structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105755476A CN102569822A (en) | 2010-12-07 | 2010-12-07 | Anti-blocking air electrode for Li-air battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105755476A CN102569822A (en) | 2010-12-07 | 2010-12-07 | Anti-blocking air electrode for Li-air battery |
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| Publication Number | Publication Date |
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| CN102569822A true CN102569822A (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105755476A Pending CN102569822A (en) | 2010-12-07 | 2010-12-07 | Anti-blocking air electrode for Li-air battery |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031158A (en) * | 1987-07-06 | 1989-02-15 | 艾尔坎国际有限公司 | Air cathode and material thereof |
| CN101421865A (en) * | 2006-03-10 | 2009-04-29 | 埃克塞勒特龙固体公司 | Air battery and manufacturing method |
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2010
- 2010-12-07 CN CN2010105755476A patent/CN102569822A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031158A (en) * | 1987-07-06 | 1989-02-15 | 艾尔坎国际有限公司 | Air cathode and material thereof |
| CN101421865A (en) * | 2006-03-10 | 2009-04-29 | 埃克塞勒特龙固体公司 | Air battery and manufacturing method |
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Application publication date: 20120711 |