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  1. #1
    Senior Member
    Join Date
    Jun 2014


    Since most of the battery bank conversations are in this area...

    I dont think theres a DIY version, but a small business guy/inventor is pursuing these as part of a pellet style furnace/power system. And hes thinking possibly heavy off-grid use for his clients.

    Solid oxide fuel cells (SOFCs) are a class of device which make conversion of electrochemical fuel to electricity with negligible pollution[1]. SOFCs have two major configurations: flat planar and tubular and the SOFCs system consists of a stack that is made of many unit cells. Each unit cell is composed of two porous electrodes, a solid ceramic electrolyte and interconnects. Unlike other fuel cells, the SOFCs conduct oxygen ions from the cathode to the anode through the electrolyte, and hydrogen or carbon monoxide reacts with the oxygen ions in the anode[2]. The materials of anode and cathode have different requirements; the anode should withstand a very reducing high temperature environment whilst the cathode has to survive a very oxidising high temperature environment[3].

    Among all the important fuel cells under development, the solid oxide fuel cells operate at the highest operating temperature, typically between 600 and 1000℃[4]. So the SOFCs has also been called the third-generation fuel cell technology because it was expected to be put into application widely after the commercialisation of Phosphoric Acid Fuel Cells (PAFCs) (the first generation) and Molten Carbonate Fuel Cells (MCFCs) (the second generation)[2]. The solid oxide fuel cell is composed of all solid components with the electrolyte acting as an oxide ion conductor and operating at high temperature (~1000℃) in order to ensure adequate ionic and electronic conductivity for the cell components[5].

  2. #2
    Senior Member LB303's Avatar
    Join Date
    Jul 2013
    not far enough
    As Arte Johnson would say, Verrrry interesting.
    If I understand it correctly, there is an opportunity to scavenge a worthwhile amount of heat from these cells while they are in use.
    That would raise the system efficiency, while guarding against an unfortunate thermal event.
    The challenge is to make the manufacture more economical.
    Seems there is quite a bit of hi-tech metallurgy going on with the electrodes, as well as pretty stringent requirements for purity in the ceramic electrolyte.
    They will be building on the knowledge acquired by the silicon chip industry... There were many problems to be solved in the early days of substrate manufacture.

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