CN1307733C - Preparation method of electrode for all-vanadium ion flow battery - Google Patents

Preparation method of electrode for all-vanadium ion flow battery Download PDF

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Publication number
CN1307733C
CN1307733C CNB031455735A CN03145573A CN1307733C CN 1307733 C CN1307733 C CN 1307733C CN B031455735 A CNB031455735 A CN B031455735A CN 03145573 A CN03145573 A CN 03145573A CN 1307733 C CN1307733 C CN 1307733C
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China
Prior art keywords
electrode
pastel
synthetic rubber
ratio
thermoplastic polymer
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Expired - Fee Related
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CN1567618A (en
Inventor
刘素琴
黄可龙
张波
黄朝晖
伍秋美
李林德
常志峰
张世民
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Iron & Steel Research Institute Panzhihu
Central South University
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Iron & Steel Research Institute Panzhihu
Central South University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention belongs to the field of battery electrode manufacturing, and is characterized in that synthetic rubber (1) or thermoplastic polymer (2) or a mixture (3) of the synthetic rubber and the thermoplastic polymer with the mass ratio of 1: 1-9: 1 is dissolved in an organic solvent with the solid-to-liquid ratio of 1: 1-1: 15; then adding conductive filler into the solution in proportion, and stirring and mixing for 0.2-5 hours at normal temperature to obtain a pasty conductive material; and coating the conductive material on a carbon felt, and pressing and forming the carbon felt and a metal current collector at room temperature to obtain the electrode for the vanadium battery. The invention overcomes the defects of decomposition of high molecular materials caused by difficult temperature control in the high-temperature melting process or performance reduction of conductive plastics caused by overhigh melt viscosity and the like, has simple process, convenient operation and low energy consumption, and is suitable for industrial production.

Description

The all-vanadium ionic liquid flow battery preparation method of electrode
Technical field:
The manufacturing field of battery electrode of the present invention is in particular for preparing the method for all-vanadium ionic liquid flow battery electrode.
Background technology:
Because vanadium cell is in the highly acid medium, so its electrode material requires that chemical stability is good, mechanical strength is high, electro-chemical activity is good and low-cost.And vanadium cell mainly is two classes with electrode material at present: metal species electrode and complex class electrode.
The cyclic voltammetric of metal species vanadium cell electrode and discharge and recharge experimental studies results and show, this class electrode easily forms passivating film at V (IV)/V (V) electricity to the interval inner surface of the electromotive force of generating electrodes reaction, proceeding of impeded electrode reaction, the performance electrochemical reversibility is poor, cost an arm and a leg, limited the application of this class electrode.
The preparation technology of complex class electrode adopts synthetic rubber (1) or thermoplastic polymer (2) or both mixtures (3), at first be heated to more than the melting temperature, after becoming a kind of state of fusion, add conductive filler (plain class material of charcoal or metal-powder) again, fully stir, make conductive plastics; Then, collector body (wire netting, paper tinsel or plate), conductive plastics, charcoal felt class material is hot-forming, be prepared into the vanadium cell electrode.The whole process of this method is all carried out under the high temperature more than 200 ℃, operation inconvenience, and the energy consumption height is to the equipment requirements harshness; When especially adopting high-temperature fusion synthetic rubber or thermoplastic polymer or their its mixture to prepare conductive plastics, their melt temperature is wayward; Temperature is too high slightly, and material then is decomposed; Temperature is on the low side slightly, and viscosity is then increased, and it is inhomogeneous to cause conductive filler to mix, and influences the electric conductivity of prepared material.
The purpose of invention:
The objective of the invention is: overcome the shortcoming in high temperature hot pressing condition bottom electrode preparation technology, a kind of method that can prepare all-vanadium ionic liquid flow battery with electrode at normal temperatures is provided, its technology is simple, easy to operate, energy consumption is low, be suitable for suitability for industrialized production; The vanadium cell electrode cost of producing with the present invention is low, satisfies the performance requirement of vanadium cell.
Technical measures of the present invention are: at first with synthetic rubber (1), or thermoplastic polymer (2), or be 1: 1~9: 1 synthetic rubber and the mixture of thermoplastic polymer (3) by solid-to-liquid ratio by mass ratio be to be dissolved in organic solvent in 1: 1~1: 15; In solution, add conductive filler then in proportion, mixed at normal temperatures 0.2~5 hour, get the pasty state electric conducting material; Again this electric conducting material is coated on the charcoal felt, promptly makes the vanadium cell electrode with metal current collector compression moulding at room temperature.
Synthetic rubber (1) is hydrogen rubber, ethylene-propylene-divinyl polymer, ethylene-propylene copolymer, styrene-butadiene, ethylene-propylene rubber, poly-butyl rubber, s-B-S.
Organic solvent is cyclohexane or acetone, ethyl acetate, chloroform, toluene, ether, benzene or methyl-sulfoxide.
Conductive filler is graphite powder, carbon black, acetylene black, metal powder, two or more the mixture in them.
Thermoplastic polymer (2) is polyethylene, polypropylene, polybutene, polystyrene.
Advantage of the present invention and good effect are mainly reflected in following several aspect:
1. prepare the vanadium cell electrode with the present invention, entire making process is all finished under normal temperature (room temperature), but energy savings not only, and easy to operate, need not to use any special installation;
2. the present invention is in the preparation process of conductive plastics, replace high-temperature fusion with solvent, because the quantity of solvent of being added can be regulated according to the size of required solution viscosity, it is wayward and macromolecular material that cause decomposes to have overcome temperature in the high-temperature fusion process, or melt viscosity is crossed the shortcoming that conductive plastics performance that high reason causes reduces, therefore, the qualification rate height of electrode product.
Description of drawings:
Fig. 1 is a process flow diagram of the present invention.
Embodiment:
Embodiment 1
Take by weighing the synthetic rubber s-B-S, add solvent toluene than the ratio that is 1: 3, mixed 0.2~1.0 hour in solid (quality) liquid (volume);
In the synthetic rubber mass ratio is that to take by weighing mass ratio be 4: 1 the conductive filler graphite powder and the mixture of acetylene black for 1: 0.3 ratio; It is added in the synthetic rubber solution, stirred 0.2~5.0 hour, conductive filler and synthetic rubber are mixed, get pastel;
This pastel is coated on the one side of charcoal felt or graphite felt, and is stained with metal current collector in the one side that scribbles pastel and then makes termination electrode; And apply one deck pastel again and be stained with the charcoal felt or graphite felt then makes the dual polarization electrode at the another side of metal current collector.
Embodiment 2
Take by weighing a certain amount of thermoplastic polymer polyethylene, than the ratio and the oxolane that are 1: 6, mixed 0.2~1.0 hour in solid (quality) liquid (volume);
In the thermoplastic polymer mass ratio is that 1: 0.5 ratio takes by weighing the mixture that mass ratio is 6: 1 conductive filler graphite powders and carbon black;
With stirring 0.2~5.0 hour in its adding thermoplastic-polymer solution, conductive filler and thermoplastic polymer are mixed, get pastel;
This pastel is coated on the one side of charcoal felt or graphite felt, and is stained with metal current collector in the one side that scribbles pastel and then makes termination electrode; And apply one deck pastel and clay charcoal felt or graphite felt again at the another side of metal current collector and then make the dual polarization electrode.
Embodiment 3
Take by weighing 1: 0.3 mixture of synthetic rubber and thermoplastic polymer, add toluene or other solvents than the ratio that is 1: 5.0, mixed 0.2~1.0 hour in solid (quality) liquid (volume);
In the synthetic rubber mass ratio is that 1: 0.2 ratio takes by weighing the mixture that mass ratio is 5: 1 conductive filler graphite powders and acetylene black;
With stirring 0.2~5.0 hour in its adding synthetic rubber solution, conductive filler and synthetic rubber are mixed, get pastel;
This pastel is coated on the one side of charcoal felt or graphite felt, and is stained with metal current collector in the one side that scribbles pastel and then makes termination electrode; And apply one deck pastel again and be stained with the charcoal felt or graphite felt then makes the dual polarization electrode at the another side of metal current collector.

Claims (7)

1. all-vanadium ionic liquid flow battery is with the preparation method of electrode, it is characterized in that: at first with synthetic rubber (1), or thermoplastic polymer (2), or be 1: 1~9: 1 synthetic rubber and the mixture of thermoplastic polymer (3) by solid-to-liquid ratio by mass ratio be to be dissolved in organic solvent cyclohexane, acetone, ethyl acetate, chloroform, toluene, ether, benzene or methyl-sulfoxide in 1: 1~1: 15; In solution, add conductive filler then in proportion, mixed at normal temperatures 0.2~5 hour, get the pasty state electric conducting material; Again this electric conducting material is coated on the charcoal felt, promptly makes the vanadium cell electrode with metal current collector compression moulding at room temperature.
2. the all-vanadium ionic liquid flow battery according to claim 1 preparation method of electrode is characterized in that: synthetic rubber (1) is hydrogen rubber, ethylene-propylene-divinyl polymer, ethylene-propylene copolymer, styrene-butadiene, ethylene-propylene rubber, poly-butyl rubber or s-B-S.
3. all-vanadium ionic liquid flow battery according to claim 1 is characterized in that with the preparation method of electrode: conductive filler is two or more the mixture in graphite powder, carbon black, acetylene black, the metal powder.
4. the all-vanadium ionic liquid flow battery according to claim 1 preparation method of electrode is characterized in that: thermoplastic polymer (2) is polyethylene, polypropylene, polybutene or polystyrene.
5. all-vanadium ionic liquid flow battery according to claim 1 is characterized in that with the preparation method of electrode: taking by weighing the synthetic rubber s-B-S, is that 1: 3 ratio adds solvent toluene in solid-to-liquid ratio, mixes 0.2~1.0 hour;
In the synthetic rubber mass ratio is that to take by weighing mass ratio be 4: 1 the conductive filler graphite powder and the mixture of acetylene black for 1: 0.3 ratio; It is added in the synthetic rubber solution, stirred 0.2~5.0 hour, conductive filler and synthetic rubber are mixed, get pastel;
This pastel is coated on the one side of charcoal felt or graphite felt, and is stained with metal current collector in the one side that scribbles pastel and then makes termination electrode; And apply one deck pastel again and be stained with the charcoal felt or graphite felt makes the dual polarization electrode at the another side of metal current collector.
6. all-vanadium ionic liquid flow battery according to claim 1 is characterized in that with the preparation method of electrode: taking by weighing a certain amount of thermoplastic polymer polyethylene, is 1: 6 ratio and oxolane in solid-to-liquid ratio, mixes 0.2~1.0 hour;
In the thermoplastic polymer mass ratio is that 1: 0.5 ratio takes by weighing the mixture that mass ratio is 6: 1 conductive filler graphite powders and carbon black; With stirring 0.2~5.0 hour in its adding thermoplastic-polymer solution, conductive filler and thermoplastic polymer are mixed, get pastel;
This pastel is coated on the one side of charcoal felt or graphite felt, and is stained with metal current collector in the one side that scribbles pastel and then makes termination electrode; And apply one deck pastel again and be stained with the charcoal felt or graphite felt makes the dual polarization electrode at the another side of metal current collector.
7. the all-vanadium ionic liquid flow battery according to claim 1 preparation method of electrode, it is characterized in that: take by weighing 1: 0.3 mixture of synthetic rubber and thermoplastic polymer, in solid-to-liquid ratio is that 1: 5.0 ratio adds toluene, mixes 0.2~1.0 hour;
In the synthetic rubber mass ratio is that 1: 0.2 ratio takes by weighing 5: 1 the conductive filler graphite powder of mass ratio and the mixture of acetylene black; It is added in the synthetic rubber solution, stirred 0.2~5.0 hour, conductive filler and synthetic rubber are mixed, get pastel;
This pastel is coated on the one side of charcoal felt or graphite felt, and is stained with metal current collector in the one side that scribbles pastel and then makes termination electrode; And apply one deck pastel again and be stained with the charcoal felt or graphite felt makes the dual polarization electrode at the another side of metal current collector.
CNB031455735A 2003-07-04 2003-07-04 Preparation method of electrode for all-vanadium ion flow battery Expired - Fee Related CN1307733C (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101752565B (en) * 2008-12-11 2012-08-22 比亚迪股份有限公司 Battery electrode, preparation method thereof and vanadium redox flow battery comprising same

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CN100407477C (en) * 2005-04-22 2008-07-30 中南大学 Cathode for whole vanadium oxide reduction flow battery and preparation method thereof
JP5050847B2 (en) * 2005-05-31 2012-10-17 パナソニック株式会社 Secondary battery, power supply system using the same, and method of using the power supply system
CN100483812C (en) * 2006-01-25 2009-04-29 中国科学院大连化学物理研究所 Integrated pole dual-pole board for oxidation deoxidization liquid energy-storing battery and its preparation
CN100550486C (en) * 2007-08-29 2009-10-14 中国工程物理研究院电子工程研究所 Preparation method of composite conductive plastic current collector of flow battery
CN100585917C (en) * 2007-09-26 2010-01-27 中国科学院金属研究所 Preparatin method of high conductivity double polar plates for vanadium battery
CN101567452B (en) * 2009-04-20 2011-05-11 清华大学 Preparation method of liquid flow battery composite material bipolar plate
CN102751509A (en) * 2011-04-18 2012-10-24 云廷志 Method for producing termination electrode for flow battery
CN102324529B (en) * 2011-08-29 2014-12-03 国网电力科学研究院武汉南瑞有限责任公司 Preparation method of conductive plastic bipolar plate of vanadium battery
CN102340009B (en) * 2011-09-27 2013-09-04 陶淞祥 Nonmetal electrode material of vanadium redox battery and preparation method thereof
CN102361091B (en) * 2011-10-25 2013-04-03 中国东方电气集团有限公司 Integrated electrode collector plate, manufacturing method thereof and flow battery comprising same
CN102569825B (en) * 2012-02-18 2015-01-21 沈阳飞机工业(集团)有限公司 Conductive plastic composite electrode and manufacture method therefor
CN102623722B (en) * 2012-04-13 2014-06-18 北京百能汇通科技股份有限公司 Termination electrode device and preparation method for flow batteries
CN103490075B (en) * 2013-10-15 2016-03-23 攀钢集团攀枝花钢铁研究院有限公司 Vanadium redox battery and end, bipolar electrode and preparation method
CN113892203A (en) * 2019-05-16 2022-01-04 对数9物质科学私人有限公司 Carbon felt-based electrode assembly and method of manufacturing the same

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Publication number Priority date Publication date Assignee Title
CN101752565B (en) * 2008-12-11 2012-08-22 比亚迪股份有限公司 Battery electrode, preparation method thereof and vanadium redox flow battery comprising same

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