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Thread: Electrical Resistivity of Possible Plate Materials

  1. #1
    Join Date
    Jan 2010
    Posts
    25

    Electrical Resistivity of Possible Plate Materials

    Here are a few possible metals I have heard used or questioned for use as Cell Plates:

    Copper, Cu
    ohm-cm 0.00000170
    ohm-cir-mil/ft 10.2
    ohm-in 6.69e-7
    ohm-m 1.70e-8
    ohm-mm²/m 0.0170

    Gold, Au
    ohm-cm 0.00000220
    ohm-cir-mil/ft 13.2
    ohm-in 8.66e-7
    ohm-m 2.20e-8
    ohm-mm²/m 0.0220

    Silver, Ag
    ohm-cm 0.00000155
    ohm-cir-mil/ft 9.32
    ohm-in 6.10e-7
    ohm-m 1.55e-8
    ohm-mm²/m 0.0155

    Platinum, Pt
    ohm-cm 0.0000106
    ohm-cir-mil/ft 63.8
    ohm-in 0.00000417
    ohm-m 1.06e-7
    ohm-mm²/m 0.106

    Nickel, Ni
    ohm-cm 0.00000640
    ohm-cir-mil/ft 38.5
    ohm-in 0.00000252
    ohm-m 6.40e-8
    ohm-mm²/m 0.0640

    Nickel 200
    ohm-cm 0.00000960
    ohm-cir-mil/ft 57.7
    ohm-in 0.00000378
    ohm-m 9.60e-8
    ohm-mm²/m 0.0960

    Tungsten, W
    ohm-cm 0.00000565
    ohm-cir-mil/ft 34.0
    ohm-in 0.00000222
    ohm-m 5.65e-8
    ohm-mm²/m 0.0565

    Inconel Alloy 600
    ohm-cm 0.000103
    ohm-cir-mil/ft 620
    ohm-in 0.0000406
    ohm-m 0.00000103
    ohm-mm²/m 1.03

    Titanium, Ti
    ohm-cm 0.0000554
    ohm-cir-mil/ft 333
    ohm-in 0.0000218
    ohm-m 5.54e-7
    ohm-mm²/m 0.554


    304L
    ohm-cm 0.0000720
    ohm-cir-mil/ft 433
    ohm-in 0.0000283
    ohm-m 7.20e-7
    ohm-mm²/m 0.720

    316 or 316L as same
    ohm-cm 0.0000740
    ohm-cir-mil/ft 445
    ohm-in 0.0000291
    ohm-m 7.40e-7
    ohm-mm²/m 0.740

    Extruded Graphite
    ohm-cm 0.000750
    ohm-cir-mil/ft 4510
    ohm-in 0.000295
    ohm-m 0.00000750
    ohm-mm²/m 7.50


    The Best currently stable conductive plastic, polyaniline, has the same conductivity as the above graphite - which are 100 time less conductive than copper!
    These plastics are extremely difficult to process and am guessing cost a Lot. I understand they are commercially available from Sigma Aldrich... not checked.
    Plastics that are more conductive do exist, but break down fast loosing conductivity.

    There are near future plans to combine carbon nanotubes with polycarbonate to create near metal levels of conductivity by Shay Curran (associate professor of physics at University of Houston) and David Carroll (Wake Forest University). They have between them been working on projects in this field for the last decade. Lets see if they produce something soonish

    Hope you guys find this all useful

  2. #2
    Join Date
    Jan 2010
    Posts
    25
    Now added to the list.


    Nickel 200
    ohm-cm 0.00000960
    ohm-cir-mil/ft 57.7
    ohm-in 0.00000378
    ohm-m 9.60e-8
    ohm-mm²/m 0.0960


    Nickel 200 makeup:
    Carbon, C <= 0.15 %
    Copper, Cu <= 0.25 %
    Iron, Fe <= 0.40 %
    Manganese, Mn <= 0.35 %
    Nickel, Ni >= 99.0 %
    Silicon, Si <= 0.35 %
    Sulfur, S <= 0.010 %

    Will try and dig up the corrosion figures for all these another time.

    for me it is Tungsten - am just getting a quote for sheets of the stuff over the next few days maybe, if it checks out for corrosion resistance.

    else 316 Stainless till I find out the right alloy I guess....

  3. #3
    Join Date
    Nov 2009
    Posts
    103
    thanks for this, very nice list! I didn't realize that Pt was more resistant than Ni. It's also nice to have these numbers to calculate the resistance in my cell from the SS. Knowledge is power... but ignorance is bliss, thanks for making me powerful and unhappy... jerk
    I=V/R so R=V/I and V=I*R
    P=V*I
    (I=Amps, V=volts, P= power in watts, R=resistance in ohms)

  4. #4
    Join Date
    Jan 2010
    Posts
    25
    Thanks Shane, Owen_

    and good luck with your own project's too

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