Electrochemically produced three-dimensional structures for battery electrodes
AssigneeAddionics IL Ltd
InventorsMoshiel Biton, Vladimir Yufit, Farid Tariq
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Abstract
A continuous process for manufacturing electrical current collectors for primary and secondary batteries by electrochemical deposition, comprising i) providing a first roll and a second roll for winding a continuous electrically conductive substrate co-acting as a working electrode, wherein depending on polarity the working electrode can act as an anode or a cathode, wherein the substrate has first and second parallel sides, a first side whereat deposition or partial dissolution occur, and a second side acting as a counter electrode to close a circuit.
Claims35
A continuous process for manufacturing electrical current collectors for primary and secondary batteries by electrochemical deposition, comprising
- i) providing a first roll and a second roll for winding a continuous electrically conductive substrate foil having first and second parallel sides;
- ii) feeding said substrate to a space between an anode and a cathode, wherein said first side is capable of co-acting as a combined working electrode together with one of said anode and cathode, and a second side capable of co-acting as a combined counter electrode together with the other one of said anode and cathode to close a circuit;
- iii) depositing or dissolving metal atoms with respect to a first layer bondable to said first substrate side in accordance with electrical signals sent to said anode and said cathode by a central managing unit, thereby creating a continuous 3D electrode structure comprising said metal atoms on said substrate;
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- iv) winding said 3D structure on said substrate onto said second roll, thereby obtaining 3D current collectors wound on a roll and ready for use upon being unrolled and cut to desired collector sizes.
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An apparatus for continuously manufacturing electrical current collectors for primary and secondary batteries by electrochemical deposition and/or dissolution, comprising
- i) a first electrode having an inner surface, and a second electrode having an inner surface, the inner surface of each of said first and second electrodes defining a working space therebetween;
- ii) a first roll for feeding a substrate of a thickness ranging from 1 to 2000 μm through said working space;
- iii) a second roll for receiving said substrate;
- iv) an electrolyte providing metal ions for deposition on said substrate located in said working space;
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- v) an electronic controller, providing signals to said first and second electrodes to manage electrical current, potential, and power,
- the apparatus providing a roll of a wound current collector, the collector having the form of an electrically conductive substrate tape with a 3D metal structure created electrochemically on one or both of its sides, capable of being cut to a desired size and shape.
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An electrical current collector having the form of a continuous electrically conductive substrate tape having a width and a thickness, the tape having a metal 3D structure on one or both of its sides created by electrochemical deposition and/or dissolution, the thickness of the substrate being 1-2000 μm, such as 1-100 μm, and the tape being wound on a roll and configured to be cut to a desired length.
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Dependencies are inferred from the claim text.