CN103985882A - Preparation method of combined web-mode flow battery electrode - Google Patents
Preparation method of combined web-mode flow battery electrode Download PDFInfo
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- CN103985882A CN103985882A CN201410194202.4A CN201410194202A CN103985882A CN 103985882 A CN103985882 A CN 103985882A CN 201410194202 A CN201410194202 A CN 201410194202A CN 103985882 A CN103985882 A CN 103985882A
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- web
- liquid flow
- electrode
- battery electrode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8875—Methods for shaping the electrode into free-standing bodies, like sheets, films or grids, e.g. moulding, hot-pressing, casting without support, extrusion without support
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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
- Y02E60/50—Fuel cells
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Preliminary Treatment Of Fibers (AREA)
Abstract
The invention belongs to the field of preparation of electrode materials, and in particular relates to a preparation method of a combined web-mode flow battery electrode. The invention combines the advantages of air laying web and carding lapping, fiber is subjected to opening mixing, and fed in a high-speed rotary cylinder, for further carding into a single fiber. Under the combined effects of centrifugal force and air flow, fibers shed from the needle teeth are transported by the air and condensed onto a web-forming curtain to form a web, and the preoxidated felt blank forming a web is subjected to carbonization / graphitization treatment, so as to finally obtain the liquid battery electrode material. The method provided by the invention is innovative in that air laying web and carding lapping are combined, thus increasing the aperture rate of the fibers of prepared liquid flow battery electrode material, arranging most of the fibers in a longitudinal direction, reducing the charge and discharge resistance of the liquid flow battery electrode material; and the method also makes the production of the liquid flow battery electrode material simple and practicable, improves production efficiency, and ensures no affect on the electrode quality.
Description
Technical field
The invention belongs to electrode material preparation field, particularly a kind of electrode of liquid flow cell preparation method who is combined into net mode.
Background technology
Flow battery is a kind of novel energy-storing and Efficient Conversion device, using the solion of different valence state respectively as the active material of anodal and negative pole, be stored in respectively in electrolyte storage tank separately, by external pump, electrolyte is pumped in battery pile body, it is circulated in the closed-loop path of different fluid reservoirs and half-cell, adopt the barrier film of amberplex as battery pack, electrolyte solution concurrent flow is crossed the concurrent biochemical reaction of electrode surface, collect and conduction current by double electrode plate, make the chemical energy of energy storage in solution convert electric energy to.This reversible course of reaction makes flow battery can complete smoothly charging, discharge and recharge.
At present, electrode of liquid flow cell material mainly contains carbon felt and graphite felt two classes.Carbon felt firing temperature is low, degree of graphitization is relatively low; Graphite felt firing temperature is high, degree of graphitization is higher.Both electric conductivity differences, price difference.The concrete design that uses which kind of electrode material to depend on flow cell pile.Good electrode material can improve the current density of flow battery, and bipolar plates anticorrosive had to certain protective effect.
Charge/discharge capacity and the discharge and recharge time of internal resistance to battery that discharges and recharges of electrode of liquid flow cell has a direct impact.In unit interval, flow through the electrolyte that electrode is more, the time that discharges and recharges is more of a specified duration, and charge/discharge capacity is larger.When discharging and recharging after internal resistance increase, can reduce electrolyte the efficiency that flows through electrode, and then reduce the charge/discharge capacity of battery, be unfavorable for the use of flow battery.Porosity and fiber longitudinal arrangement when reducing the feasible method that discharges and recharges internal resistance for a change electrode becoming net between fiber.Porosity is larger, and the electrolyte in ostium is more, otherwise if porosity is little, electrolyte stream, less than in aperture, makes hole electrolyte inside dilution, and the concentration polarization that can increase electrode reaction causes internal resistance to increase; Electrolyte is generally longitudinally along the mobile direction of electrode, if the orientation of fiber is consistent with the direction that electrolyte flows through electrode, or consistent more, just less to flowing through the resistance that electrolyte forms, electrode to discharge and recharge internal resistance less.At present, the electrode material porosity that general production method obtains, and fiber direction entanglement is unordered, and the uniformity is poor.
Summary of the invention
There is for the product of conventional production methods the problem that porosity is little, fiber alignment is unordered and the uniformity is poor, the present invention combines the advantage of air lay and combing lapping, fiber is after shredding mixes, and the cylinder of feeding high speed rotary, is further carded to ultimate fibre.Under the centrifugal force of cylinder and the synergy of air-flow, fiber comes off from pin tooth, carries by air-flow, condense upon on lace curtaining, form fibre web, the pre-oxygen felt blanket body after one-tenth is netted is through carbonization/graphitization processing, finally make electrode of liquid flow cell material, it is characterized in that, comprise following sequential steps:
The first step: shortly cut the shredding of pre-oxygen silk
Cut the shredding on opener of pre-oxygen silk by short;
Second step: air lay
Shortly cut pre-oxygen silk be fed to the cylinder of high speed rotary after shredding mix, be carded to ultimate fibre, after under the centrifugal force of cylinder and the effect of air-flow, ultimate fibre condenses upon into and on lace curtaining, forms individual layer fibre web;
The 3rd step: combing lapping
Individual layer fibre web is admitted to carding after combing lapping machine, forms pre-oxygen felt blanket body;
The 4th step: carbonization/graphitization
The pre-oxygen felt blanket body of carding is made to electrode of liquid flow cell material after carbonization/graphitization processing.
Further, in the described first step, shredding number of times is 2-6 time.
Further, in described second step, cylinder speed of gyration is 280-458r/min.
The innovative point of the inventive method is that air lay and combing lapping are combined, thereby increase the aperture rate making between electrode of liquid flow cell material fiber, make fiber alignment mostly be longitudinal simultaneously, reduce the resistance that discharges and recharges of electrode of liquid flow cell material, also make the production of electrode of liquid flow cell material become simple, enhance productivity, ensure that electrode quality is unaffected.
Brief description of the drawings
Fig. 1 is a kind of electrode of liquid flow cell preparation method process chart that is combined into net mode.
Embodiment
Describe the present invention in detail below in conjunction with specific embodiments and the drawings, but the present invention is not limited to specific embodiment.
Embodiment 1
Adopt technological process shown in accompanying drawing 1 to be combined into the electrode of liquid flow cell preparation of net mode.Concrete sequential steps is as follows:
The first step: shortly cut the shredding of pre-oxygen silk
Opener is generally made up of a pair of feeding roller or feeding roller and a shredding cylinder, and brad or card wire or card clothing or porcupine hired roughneck are housed on shredding cylinder, more thorough for shredding, and what have is also equipped with working roll and angle stripper on cylinder.Different structures makes its shredding effect, mixed effect, impurity-eliminating effect have obvious difference, therefore on the production line requiring in difference, should adopt multi-form opener, also can be according to the raw material choose opener of processing, the fiber after shredding feeds carding machine again and processes.In the present embodiment, get that 500kg is short cuts pre-oxygen silk, be placed on opener shredding 2 times, make it fully open and not damage physical aspect;
Second step: air lay
Air lay can make shortly to cut pre-oxygen silk and become net simple, reduces the requirement to precursor, makes some crimpnesses less, even can become net without any curling pre-oxygen silk.In the present embodiment, cylinder rotating speed is set to 280r/min, by the mixed shredding short cylinder of cutting pre-oxygen silk feeding high speed rotary, on pin tooth, be carded to ultimate fibre, after under the centrifugal force of cylinder and the effect of air-flow, ultimate fibre comes off from pin tooth, under air-flow is carried, ultimate fibre condenses upon into and on lace curtaining, forms individual layer fibre web;
The 3rd step: combing lapping
Combing lapping is to fold not only but also spread, and is mainly in order further individual layer fibre web to be widened, thicken, to be mixed, and uses for carbonization/graphitization.When the advantage of combing lapping is into net, the even density of fibre web and the orientation of fiber are unified, and basic one-tenth longitudinally.In the present embodiment, individual layer fibre web is admitted to carding after combing lapping machine, forms pre-oxygen felt blanket body;
The 4th step: carbonization/graphitization
Pre-the polyacrylonitrile-radical of carding oxygen felt blanket body is made to electrode of liquid flow cell material after carbonization/graphitization processing.
Embodiment 2
Adopt technological process shown in accompanying drawing 1 to be combined into the electrode of liquid flow cell preparation of net mode.Concrete sequential steps is as follows:
The first step: shortly cut the shredding of pre-oxygen silk
Get that 800kg is short cuts pre-oxygen silk, be placed on opener shredding 4 times, make it fully open and not damage physical aspect;
Second step: air lay
Starting device, cylinder rotating speed is set to 369r/min, by the mixed shredding short cylinder of cutting pre-oxygen silk feeding high speed rotary, on pin tooth, be carded to ultimate fibre, after under the centrifugal force of cylinder and the effect of air-flow, ultimate fibre comes off from pin tooth, and under air-flow is carried, ultimate fibre condenses upon into and on lace curtaining, forms individual layer fibre web;
The 3rd step: combing lapping
Individual layer fibre web is admitted to carding after combing lapping machine, forms pre-oxygen felt blanket body;
The 4th step: carbonization/graphitization
The pre-oxygen felt blanket body of carding is made to electrode of liquid flow cell material after carbonization/graphitization processing.
Embodiment 3
Adopt technological process shown in accompanying drawing 1 to be combined into the electrode of liquid flow cell preparation of net mode.Concrete sequential steps is as follows:
The first step: shortly cut the shredding of pre-oxygen silk
Get that 1000kg is short cuts pre-oxygen silk, be placed on opener shredding 6 times, make it fully open and not damage physical aspect;
Second step: air lay
Starting device, cylinder rotating speed is set to 458r/min, by the mixed shredding short cylinder of cutting pre-oxygen silk feeding high speed rotary, on pin tooth, be carded to ultimate fibre, after under the centrifugal force of cylinder and the effect of air-flow, ultimate fibre comes off from pin tooth, and under air-flow is carried, ultimate fibre condenses upon into and on lace curtaining, forms individual layer fibre web;
The 3rd step: combing lapping
Individual layer fibre web is admitted to carding after combing lapping machine, forms pre-oxygen felt blanket body;
The 4th step: carbonization/graphitization
The pre-oxygen felt blanket body of carding is made to electrode of liquid flow cell material after carbonization/graphitization processing.
Claims (3)
1. an electrode of liquid flow cell preparation method who is combined into net mode, is characterized in that, comprises following sequential steps:
The first step: shortly cut the shredding of pre-oxygen silk
Cut the shredding on opener of pre-oxygen silk by short;
Second step: air lay
Shortly cut pre-oxygen silk be fed to the cylinder of high speed rotary after shredding mix, be carded to ultimate fibre, after under the centrifugal force of cylinder and the effect of air-flow, ultimate fibre condenses upon into and on lace curtaining, forms individual layer fibre web;
The 3rd step: combing lapping
Individual layer fibre web is admitted to carding after combing lapping machine, forms pre-oxygen felt blanket body;
The 4th step: carbonization/graphitization
The pre-oxygen felt blanket body of carding is made to electrode of liquid flow cell material after carbonization/graphitization processing.
2. a kind of electrode of liquid flow cell preparation method who is combined into net mode according to claim 1, is characterized in that: in the described first step, shredding number of times is 2-6 time.
3. a kind of electrode of liquid flow cell preparation method who is combined into net mode according to claim 1, is characterized in that: in described second step, cylinder speed of gyration is 280-458r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410194202.4A CN103985882A (en) | 2014-05-08 | 2014-05-08 | Preparation method of combined web-mode flow battery electrode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410194202.4A CN103985882A (en) | 2014-05-08 | 2014-05-08 | Preparation method of combined web-mode flow battery electrode |
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| CN201410194202.4A Pending CN103985882A (en) | 2014-05-08 | 2014-05-08 | Preparation method of combined web-mode flow battery electrode |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0317957A (en) * | 1989-06-15 | 1991-01-25 | Kanai Jiyuuyou Kogyo Kk | Nickel plated unwoven electrode and manufacture thereof |
| CN102787450A (en) * | 2012-08-20 | 2012-11-21 | 绍兴县庄洁无纺材料有限公司 | Pneumatically long-and-short-fibre blended web forming device |
| CN103474125A (en) * | 2013-09-11 | 2013-12-25 | 上海骐杰碳素材料有限公司 | Electrode material made of waste fibers and manufacturing method thereof |
-
2014
- 2014-05-08 CN CN201410194202.4A patent/CN103985882A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0317957A (en) * | 1989-06-15 | 1991-01-25 | Kanai Jiyuuyou Kogyo Kk | Nickel plated unwoven electrode and manufacture thereof |
| CN102787450A (en) * | 2012-08-20 | 2012-11-21 | 绍兴县庄洁无纺材料有限公司 | Pneumatically long-and-short-fibre blended web forming device |
| CN103474125A (en) * | 2013-09-11 | 2013-12-25 | 上海骐杰碳素材料有限公司 | Electrode material made of waste fibers and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王继祖: "非织造布（干法）成网工艺路线剖析", 《纺织学报》 * |
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Application publication date: 20140813 |