DE156713C - - Google Patents

Info

Publication number
DE156713C
DE156713C DENDAT156713D DE156713DA DE156713C DE 156713 C DE156713 C DE 156713C DE NDAT156713 D DENDAT156713 D DE NDAT156713D DE 156713D A DE156713D A DE 156713DA DE 156713 C DE156713 C DE 156713C
Authority
DE
Germany
Prior art keywords
graphite
electrode
mass
active
cake obtained
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.)
Active
Application number
DENDAT156713D
Other languages
German (de)
Publication of DE156713C publication Critical patent/DE156713C/de
Active legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/04Processes of manufacture in general
    • H01M4/0473Filling tube-or pockets type electrodes; Applying active mass in cup-shaped terminals
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M2004/026Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/028Positive electrodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/04Processes of manufacture in general
    • H01M4/043Processes of manufacture in general involving compressing or compaction
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/48Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/62Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624Electric conductive fillers
    • H01M4/625Carbon or graphite
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/64Carriers or collectors
    • H01M4/70Carriers or collectors characterised by shape or form
    • H01M4/76Containers for holding the active material, e.g. tubes, capsules
    • H01M4/762Porous or perforated metallic containers
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Description

PATENTAMT.PATENT OFFICE.

-JVr 156713 KLASSE 21 h. -JVr 156713 CLASS 21 h.

Den Gegenstand des Hauptpateutes 147468 bildet eine Sammlerelektrode, bei welcher dem wirksamen Material Graphit in Schuppenform beigemischt ist. Vorliegende Erfindung bezweckt, die Elektrode des Hauptpatentes dadurch zu vervollkommnen, daß die Mischung der wirksamen Masse mit dem schuppigen Graphit nach einem bestimmten Verfahren erfolgt, bei dem durch ein Minimum von Graphit eine möglichst große leitende Fläche und eine möglichst dünne, die leitende Fläche bedeckende Schicht aktiver "Masse erzielt wird.The subject of the main sponsor 147468 is a collector electrode, in which the effective material graphite is added in flake form. The present invention aims to perfect the electrode of the main patent that the mixture of the effective mass with the flaky Graphite is made according to a certain process in which a minimum of graphite creates the largest possible conductive surface and as thin a layer of active "material as possible, covering the conductive surface, is achieved.

Das Verfahren besteht darin, daß die ausThe procedure is that the

der aktiven Masse und dem schuppigen Graphit bestehende Paste wiederholt ausgewalzt und der beim Auswalzen gewonnene Kuchen wieder zerbröckelt' wird, wodurch die aktive Masse in sehr dünner Schicht auf den Graphitschuppen verteilt wird ohne gleichzeitige übermäßige Zerkleinerung der letzteren. Es beruht dies darauf, daß beim Zerbröckeln des durch Auswalzen gewonnenen Kuchens die Graphitschuppen infolge ihrer Schieferung in immer dünnere Plättchen zerrissen werden, die beim fortgesetzten Durchmischen und Auswalzen mit einer Schicht von aktiver Masse bedeckt werden.the active mass and the flaky graphite existing paste rolled out repeatedly and the cake obtained by rolling out is crumbled again, whereby the active mass is distributed in a very thin layer on the graphite flakes without simultaneous excessive crushing of the latter. This is due to the fact that when crumbled of the cake obtained by rolling out the graphite flakes as a result of their foliation are torn into ever thinner platelets, which with continued mixing and Roll out to be covered with a layer of active mass.

Als Elektrodenmasse kann bei der Durch1 führung des Verfahrens jedes an sich als Elektrodenmasse geeignete, fein verteilte Material Anwendung finden; besonderen Vorteil bietet das Verfahren jedoch, wenn die Elektrodenmasse nahezu als Nichtleiter anzur sprechen ist und überdies die Neigung hat, bei der Sauerstoffaufnahme im Sammler stark zu schwellen, wie es insbesondere bei den Hydraten der Nickelsauerstoffverbindungen der Fall ist, die trotz ihrer sonstigen vortrefflichen Eigenschaften ohne die durch das vorliegende Verfahren gewährleistete vollkommene Durchsetzung der Elektrodenmasse mit Graphitschuppen kaum Anwendung finden können.As electrode material for the guidance through 1 of the process may be any suitable per se as an electrode mass, find application finely divided material; However, the method offers a particular advantage if the electrode mass can be addressed almost as a non-conductor and also has the tendency to swell sharply when oxygen is absorbed in the collector, as is the case in particular with the hydrates of nickel-oxygen compounds, which despite their other excellent properties are without the complete penetration of the electrode mass with graphite flakes guaranteed by the present process can hardly be used.

Die Ausführung des Verfahrens gestaltet sich wie folgt:The procedure is carried out as follows:

Die fein verteilte aktive Masse, etwa das Hydrat einer Nickelsauerstoffverbindung, wird mit schuppigem Graphit in geeignetem Verhältnis, etwa auf 6 Teile Elektrodenmasse 4 Teile oder weniger Graphit, gemischt. - Das Gemisch wird darauf schwach mit Wasser oder einer Lösung von Kaliumhydroxyd angefeuchtet und durch eine oder mehrere Walzen von Hand oder auf mechanischem Wege zu einer dünnen Schicht ausgewalzt. Diese Schicht wird darauf zerbröckelt undThe finely divided active material, such as the hydrate of a nickel-oxygen compound, is with flaky graphite in a suitable ratio, approximately to 6 parts of electrode mass 4 parts or less graphite mixed. - The mixture then becomes weak with water or a solution of potassium hydroxide and moistened by one or more rollers by hand or on mechanical Paths rolled out into a thin layer. This layer is crumbled on and

von neuem ausgewalzt. Diese Operationen werden so oft wiederholt, bis die fein verteilte Elektrodenmasse in Form von dünnen Schichten die Oberfläche der Graphitschuppen bedeckt. Hierauf wird die Masse in geeigneter Weise getrocknet.rolled out again. These operations are repeated until the finely divided Electrode compound in the form of thin layers covers the surface of the graphite scales. The mass is then dried in a suitable manner.

Das auf die vorbeschriebene Weise hergestellte Gemisch aus der aktiven Masse und schuppigem Graphit wird unter Druck zu ίο Blöcken geformt und in durchbrochene metallene Behälter oder Taschen, welche in geeigneter Weise an Platten oder Gittern befestigt sind, eingelegt.The mixture of the active composition and prepared in the manner described above flaky graphite is formed under pressure into ίο blocks and broken into openwork metal Containers or bags suitably attached to panels or grids are inserted.

Claims (1)

Patent-Anspruch:
Verfahren zur Herstellung von Sammlerelektroden gemäß Patent 147468, dadurch gekennzeichnet, daß die fein verteilte, wirksame Elektrodenmasse mit dem schuppigen Graphit in plastischem Zustande zusammengewalzt, darauf der dadurch erhaltene Kuchen zerbröckelt und dieses Verfahren mehrmals wiederholt wird, zum Zwecke, durch die hierdurch erzielte weitgehende Blätterung des Graphits die elektrische Leitfähigkeit der Elektrode zu verbessern.
Patent claim:
Process for the production of collector electrodes according to patent 147468, characterized in that the finely distributed, effective electrode mass is rolled together with the flaky graphite in a plastic state, then the cake obtained thereby crumbles and this process is repeated several times, for the purpose of the extensive foliage achieved in this way of graphite to improve the electrical conductivity of the electrode.
DENDAT156713D Active DE156713C (en)

Publications (1)

Publication Number Publication Date
DE156713C true DE156713C (en)

Family

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Family Applications (1)

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1215789B (en) * 1958-11-21 1966-05-05 Union Carbide Corp Process for the production of a gas-tight sealed alkaline secondary element
US4212411A (en) * 1978-06-12 1980-07-15 The Bendix Corporation Master cylinder reservoir cover

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1215789B (en) * 1958-11-21 1966-05-05 Union Carbide Corp Process for the production of a gas-tight sealed alkaline secondary element
US4212411A (en) * 1978-06-12 1980-07-15 The Bendix Corporation Master cylinder reservoir cover

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