Methods for forming foamed electrode structures

Abstract

Electrode structures may include an electronically conductive foam in contact with an electronically conductive substrate. In some embodiments, the foam may be formed by coating a porous precursor material in contact with a substrate with an electronically conductive material and subsequently removing the precursor material. In some embodiments, the foam may be formed by removing a non-conductive component of a composite material in contact with a substrate, leaving a conductive component in contact with the substrate. Electrode structures may be coated with electronically conductive materials or sintered at elevated temperature to improve durability and conductivity.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 61 / 239,910, filed September 4, 2009, which is incorporated herein by reference. technical field [0003] The present application relates to the formation of electrodes, and more particularly to process techniques for producing electrode structures comprising electronically conductive foams and electronically conductive substrates. Background technique [0004] Electrodes are used to supply and remove electrons from some medium and are typically made of metal or metal alloys. Electrochemical cells use electrodes to facilitate the transfer and transport of electrons during electrochemical interactions. Accumulators or electrochemical storage devices can use electrodes in galvanic and electrolytic capacity, corresponding to a discharge process or a charge process, respectively. Electrochemical reactions typically occur at or near the interface of the ele...

AI Technical Summary

Problems solved by technology

These numerous process steps often use multiple subassemblies, which can increase cost, increase infrastructure requirements, and introduce opportunities for manufacturing errors to occur

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