DE519148C - Process for the production of pressed depolarization electrodes - Google Patents
Process for the production of pressed depolarization electrodesInfo
- Publication number
- DE519148C DE519148C DE1930519148D DE519148DD DE519148C DE 519148 C DE519148 C DE 519148C DE 1930519148 D DE1930519148 D DE 1930519148D DE 519148D D DE519148D D DE 519148DD DE 519148 C DE519148 C DE 519148C
- Authority
- DE
- Germany
- Prior art keywords
- pressed
- depolarization
- electrodes
- production
- addition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- 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
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
Verfahren zur Herstellung von gepreßten Depolarisationselektroden Die gepreßten Depolarisationselektroden werden gewöhnlich mit Stoff oder Papier umwickelt, um ein Quellen der aktiven Masse zu verhindern, wenn sie sich beim Ansetzen der Zellen mit Elektrolyt vollsaugen. Diese Umwicklung bedeutet nicht nur eine Verteuerung der Herstellung, sondern auch eine Herabsetzung der Leistungsfähigkeit infolge der unvermeidlichen Widerstandszunahme. Es sind daher eine Reihe von Verfahren vorgeschlagen worden, die die Herstellung von nicht quellenden Preßlingen bezwecken. Beispielsweise ist der Zusatz von harzigen öder öligen Bindemitteln zur aktiven Masse vorgeschlagen worden. Dieses Verfahren führt zwar zum Ziel, aber die Zusätze verursachen eine Verringerung der Leitfähigkeit, und sie setzen auch die Gesamtkapazität herab, indem sie durch teilweise Bedeckung der Depolarisatorteilchen .diese ihrer chemischen Wirkung entziehen. Ferner ist die Verwendung sehr fein gemahlenen Depolarisators vorgeschlagen worden, damit die Adhäsion zwischen den Teilchen durch die Kapillarkräfte beim Tränken nicht überwunden werden kann. Dieses Verfahren hat aber den Nachteil, daß die Poren zu eng werden und daß die wirksame Oberfläche der Depolarisatorteilchen verringert ist, obwohl die Gesamtoberfläche durch die feinere Mahlung naturgemäß vergrößert ist. Gemäß der Erfindung werden diese Nachteile vermieden, indem der aktiven Masse organische Fasern zugesetzt werden, die sich beim Pressen verfilzen und hierdurch dem Ouellen des Preßlings vorbeugen. Als besonders geeignet hat sich sogenannter Ramiekammzug .erwiesen, von dem ein ganz geringer Zusatz ausreicht. Ein derartiger Zusatz gestattet die Verwendung von verhältnismäßig grobkörnigem Depolarisator und die Anwendung eines verhältnismäßig niedrigen Preßdrucks, so daß die aktive Masse eine große wirksame Oberfläche bei hochgradiger Porosität besitzt und demzufolge die Nutzkapazität der damit hergestellten Elemente trotz der verringerten Gestehungskosten heraufgesetzt ist. Die Ramiefaser eignet sich deswegen besonders gut, weil sie hohe Zugfestigkeit mit verhältnismäßig geringer Quellfähigkeit verbindet.Process for the manufacture of pressed depolarization electrodes The pressed depolarization electrodes are usually covered with cloth or paper wrapped to prevent the active material from swelling when it is applied soak the cells with electrolyte. This wrapping does not only mean an increase in the price production, but also a reduction in performance as a result of inevitable increase in resistance. A number of methods have therefore been proposed which are intended to produce non-swelling compacts. For example the addition of resinous or oily binders to the active material is proposed been. This procedure works, but the additives cause one Decrease the conductivity, and they also decrease the total capacitance by they by partially covering the depolarizer particles .these of their chemical Withdraw effect. In addition, very finely ground depolarizers are used has been suggested to allow adhesion between particles by capillary forces cannot be overcome when watering. However, this method has the disadvantage that the pores become too narrow and that the effective surface of the depolarizer particles is reduced, although the total surface is naturally due to the finer grinding is enlarged. According to the invention, these disadvantages are avoided by the Active mass organic fibers are added, which become matted during pressing and thereby prevent the pressed product from being oozed. Has proven to be particularly suitable so-called ramie comb, of which a very small addition is sufficient. Such an addition allows the use of relatively coarse-grained Depolarizer and the application of a relatively low pressure, so that the active mass has a large effective surface with a high degree of porosity and consequently the useful capacity of the elements produced with it despite the reduced Prime cost is increased. The ramie fiber is therefore particularly suitable good because it combines high tensile strength with relatively low swellability.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE519148T | 1930-04-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE519148C true DE519148C (en) | 1931-02-24 |
Family
ID=6550372
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1930519148D Expired DE519148C (en) | 1930-04-05 | 1930-04-05 | Process for the production of pressed depolarization electrodes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE519148C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1096438B (en) * | 1953-09-25 | 1961-01-05 | Erik Gustav Hysing | Galvanic primary element |
DE1156128B (en) * | 1959-07-03 | 1963-10-24 | Varta Pertrix Union Ges Mit Be | Manganese dioxide electrode for galvanic primary elements |
-
1930
- 1930-04-05 DE DE1930519148D patent/DE519148C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1096438B (en) * | 1953-09-25 | 1961-01-05 | Erik Gustav Hysing | Galvanic primary element |
DE1156128B (en) * | 1959-07-03 | 1963-10-24 | Varta Pertrix Union Ges Mit Be | Manganese dioxide electrode for galvanic primary elements |
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