Sorapec S.a.

Agence Nationale De Valorisation De La Recherche (anvar)

Laboratoires Sorapec

Laboratoires Sorapec Societe Anonyme

T.r.e.g.i.e.

Seregie

Guy Bronoel

Noelle Tassin

Bernard Bugnet

Denis Doniat

Maurice Bonnemay

Joel Sarradin

Thierry Potier

Robert Rouget

Suzanne Maximovitch Nee Fabre

Annick Percheron Nee Guegan

Jean-Claude Achard

Olivier Breting

Alain Millot

Gilbert Peslerbe

Louis Schlapbach

Serge Besse

No&eacute;lle Tassin

Lysiane Angely

Annick Percheron Born Guegen

Jean Loriers

Jean Claude Achard

An alkaline storage battery comprising at least one positive electrode and a negative zinc electrode in contact with an electrolyte via at least one electrolyte-impregnated separator is disclosed. The electrodes are clamped against two respective bipolar screens supported by a sealing frame. The positive electrode is in contact with a first electrolyte having a predetermined volume and composition via at least one first separator, the negative electrode is in contact with a second electrolyte having a predetermined volume and composition different from those of the first electrolytes via at least one second separator, and the first and second electrolytes are separated by a membrane forming a zincate and optionally aluminate filter, particularly an anionically conductive membrane defining first and second compartments.

Alkaline storage battery with a negative zinc electrode

Bipolar electrode for battery with alkaline electrolyte

Bipolar electrode is provided with a conductive support/separator perforated on a part which is free from active material with at least one opening which communicates by a gaseous environment in a battery between elements assembled in series. The opening prevents the passage of electrolyte from one conductive support/separator to another, and may include an advantageously hydrophobic material, which also contains an opening therethrough, and is arranged on at least one side of the opening. The bipolar electrodes are particularly applicable to sealed batteries.

Bipolar electrode for batteries

The cadmium negative electrode has a structure serving as a collector and made of nickel foam. The sponge is filled with a mixture cons mainly of cadmium oxide and contains nickel sulphate hexahydrate in the proportion of 1.8 to 2.7% by weight of the total mixture, expressed in the form of nickel.

Method of making cadmium electrodes for alkaline batteries

The cadmium negative electrode has a structure serving as a collector and made of nickel foam. The sponge is filled with a mixture consisting mainly of cadmium oxide and contains nickel sulphate in the proportion of 1.8 to 2.7% by weight of the total mixture, expressed in the form of nickel.

Cadmium electrodes for alkaline batteries

The positive nickel electrode is provided having a structure of cellular nickel foam filled with a paste based on nickel hydroxide. The paste contains (in dry matter and per 100 parts by weight nickel hydroxide) 7 to 8 parts by weight powder-form nickel metal, 5 to 12 parts by weight of a cobalt hydroxide and/or salt, the parts by weight being expressed as equivalents of cobalt metal.

Positive nickel electrode

Collector support for lead/lead oxide batteries is made of a screen of electrolyte-resistant polymer coated with a conductive underlayer and a layer of lead or a lead rich alloy having a mass per surface comprised between 30 and 40 g/dm.sup.2 relative to the projected surface area of the collector support. The dimensions of the screen are such that no point inside the screen pattern is located at a distance greater than 2.5 mm from any strand of the screen.

Current collector/support for a lead/lead oxide battery

This invention relates to a process for charging a reversible electrochemical generator consisting of a plurality of cells, which are electrically in series, comprising a zinc negative electrode and a positive electrode between which a basic electrolyte, containing solubilized zinc, circulates, consisting in making the electrolyte in the cells circulate successively from one cell to the next and in applying to it a charging current forming a succession of approximately rectangular pulses. The direction of circulation of the electrolyte during charging is periodically reversed.

Process of charging an electrochemical generator having zinc negative

The invention relates to lanthanum and nickel based alloys comprising components of the La Ni.sub.5 type where the lanthanum and/or nickel are partially substituted, the substituent element comprising a metal M chosen in the VI or VII group of the elements periodic system and this according to an atomic proportion comprised between 0.1 and 2 relative to nickel, and preferably between 0.5 and 1. The invention relates also to hydrogen electrodes made from such an alloy, and to an alkaline electrode type accumulator comprising such an electrode.

New lanthanum and nickel based alloys, their manufacture and their

An electrochemical generator operating device having a zinc electrode of the type known as a scattered electrode using a fluid containing alkaline electrolyte and particles which come in contact with the negative upper face of a flat bipolar current collector when the fluid is not in circulation. The fluid is circulated through the use of an intermittent operating pump and is guided through a plurality of horizontal parallel pipes with a rectangular section in such a manner so that the operation is intermittent both during the recharge and the discharge phases and is further characterized by the fact that the off time of the pump is greater than the on time.

Electrochemical generator operating device with a zinc negative electrode

The invention relates to accumulators comprising halogen electrodes operating with fused halide based electrolyte. Such accumulators can include an electrochemical chain aluminium/mixture of aluminium halide and alkalin metal halide/metallic derivatives introduced into graphite. Application to the constitution of accumulators including halogen electrodes for considerable storage of halogen.

Accumulators including halogen electrodes operating with fused halide

The invention relates to an improved electrode for an electrochemical generator, said electrode enabling the electrochemical oxidation of hydrogen supplied of the interface of said electrode and an electrolyte. It comprises a nickel-based catalyst formed of particles or crystallites the sizes of which range from about 20 to about 130 Angstroms.

Electrode comprising a nickel based catalyst for electrochemical

The invention relates to electro materials based on lanthanum and nickel having a formula close to LaNi.sub.5 in which one of the components is partially substituted by a metal selected from those in groups Ia, II, III, IV and Va of the periodic table of elements, and other than lanthanides, in an atomic proportion which is not zero, being higher than 0.1% and lower than 25%, and preferbly from 0.5% to 15% with respect to the lanthanum.

Growing community of inventors

Versailles, France

Guy Bronoel