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--- michka:research:supercapacitors [2014-07-01 14:15] – michka
+++ michka:research:supercapacitors [2014-07-01 14:26] – michka
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    * Intercalating a sandwich layer made of printer paper dipped into the electrolyte between copper & graphene, thus replacing the insulating layer from the the dead battery
-====Information Sources====
+Our wet designs were no success.
+A sushi dipped in sulfuric acid was severly attacked. Current kept on flowing, it was bubbling slightly, the solution started to become dark. It did hold voltage and quite a good charge, but after opening it up, we saw huge corrosion spots on the copper layer.
+Sushi dipped in salted water and demineralized water showed a strange charging behavior: current was slightly increasing, before being stable around 100 mA. They ended up not charging, or having a low and evanescent charge.
+Our sandwich with salted-water-wet paper had a similar charging behavior, and copper also ended up corroded.
+Our sandwich with demineraliued-water-wet paper had a similar charging behavior, and a low and evanescent charge.
+=== Conclusion & Future Research===
+Our best dry sandwich design seems interesting. However, we are not sure wether this behavior is a consequence of some remanent electrolyte from the dead battery still present in the graphene layer. Moreover, it proved to be unstable to design change: sushis & waffles could not hold the charge as well, and the voltage stored was highly sensitive to finger pressure.
+On our next session, we have to focus on electrolytes, as they are responsible for the supercapacity of our supercapacitors. We will have a look into dried electrolytes proposed by Robert Murray-Smith, and we will try to make an upcycled one from the pile of (not necessarily) domestic waste at our disposal.
+====Preliminary Information Sources====
    * [[https://www.youtube.com/user/RobertMurraySmith|Robert Murray Smith's Youtube Channel]]
    * [[https://www.youtube.com/watch?v=SWHpc53759c|neatpete45 video of home-made supercapacitor]]
    * Robert Murray Smith - Supercapacitor 101 - A home Inventor's Handbook (ebook)