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Zinc-air batteries

Discussion in 'Battery Discussion' started by DaveD, Oct 28, 2009.

  1. DaveD

    DaveD EVs Kick Gas!

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    Technology Review: High-Energy Batteries Coming to Market

     
  2. bolosky

    bolosky Member

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    It look from the article like they'll have power density problems:

     
  3. Serge

    Serge Member

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    It seems common with all high energy density technologies. You can have either superior energy OR power density. Tesla managed to achieve good balance, but such solution is not cheap.

    Part of technology evolution maybe finding the right balance between two sources of energy with different operational characteristics.

    BTW, Technology Review expands a bit on Fluidic Energy's plans
    Sounds good, Sir, now please get back to work :wink:
     
  4. theganjaguru

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  5. curiousguy

    curiousguy curious member

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    there is no information on any batterywith an air anode with performance anywhere close tobeing pushed into development. what is missing in every single caseis an electrolyte which allows metal deposition/dissolution for anextended number of cycles without being evaporated to air and withoutbeing decomposed by superoxide radicals ( like in the Li air case).In addition, if you read the published work on these batteries theyall discharge at very, very, very, very low rates (so there is apower penalty - like it was mentioned).

    the typical response of batterydevelopment teams who do not have a decent synthetic chemist is tomove to ionic electrolytes (which would evaporate slower). theproblem with ionic electrolytes is that because it is composed ofcharged species, when an electric field is applied, the ionic specieswhich takes part in the electrochemical even has very low mobilitybecause the other ions which make up the electrolyte move under thefield instead, so again, you have a kinetic penalty. As you can seethis is not a good way to solve the problem.


    in my opinion, while attractive atfirst glance, "open" systems like those with an aircathodes have intrinsic problems which will always render theminferior to other closed systems. in addition, air contains oxygen,which forms radicals under voltage, which denature everything theytouch... so, if somone figures this problem out... they also cureparkinsons, cancer and maybe aging.
     
  6. Quacker

    Quacker Member

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    What if they paired the battery with some ultra capacitors to solve that problem?
     

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