@simonsimon-gq3rk 5 ай бұрын
genial! enfin une démonstration complète et détaillée, grace à vous je vais pouvoir avancer... vous êtes le premier à parler de la corrosion des electrodes et montrer une solution. jusque là j'utilisais des plaques d'impression offset recyclées de 0.3mm mais malgré l’électrolyte au pva/na2so4/kdp j'avais de la corrosion. personnellement pour le binder j'utilise pvp iodée "IO Shield" (produit agricole pour les trayons des vaches!!!) avec satisfaction. l'iode amène une action redox intéressante... un grand merci pour ce travail que vous partagez. PS: qu'utiliseriez-vous pour le stockage d’énergie hors réseau à moindre coût?
@claudiohomelab8181 5 ай бұрын
Bonjour Simonsimon, Merci pour votre appréciation, j’ai également utilisé de vieilles plaques d’impression offset en aluminium pour le collecteur de certaines électrodes, Je trouve très intéressante la nouvelle que vous m’avez donnée sur la façon de trouver du PVP (PVP iodé à usage agricole !!). Pour éliminer définitivement le problème de la corrosion, il suffirait d’utiliser de fines feuilles d’acier inoxydable comme collecteur des électrodes. Bien sûr, ceux-ci sont plus chers que ceux en aluminium, mais ils pourraient être la solution ultime à ce problème. Maintenant, avec ces électrodes, je construis un supercondensateur que je viens de fabriquer, je vais poster la vidéo. Pour le stockage d’énergie off-grid, mon idée est d’utiliser des supercondensateurs, Mais compte tenu de l’énorme capacité que le système nécessiterait et des coûts élevés actuels des supercondensateurs, cela n’est guère réalisable Cependant, s’il pouvait être produit à faible coût, alors ce serait la meilleure solution. Je te salue, Claudio
@sc0or 8 күн бұрын
I wonder does it make any sense to spend a time on all of this (considering number of initial fails), if you can purchase 500F for €3? Can a home made supercap beat a manufactured one in terms of a capacitance, or a voltage, or a max current?
@claudiohomelab8181 6 күн бұрын
From an economic point of view it makes no sense, and a self-built capacitor is unlikely to outperform the commercial product. But here other factors come into play: it is the pleasure of experimenting, of trying solutions different from the traditional ones. And let's not forget that, even if in rare cases, experimentation can lead to unexpected and highly rewarding results
@sc0or 6 күн бұрын
@@claudiohomelab8181 .. like an invention of rubber (they even tried to mix with soup). However since then, I cannot remember something interesting discovered outside of a lab (I mean a chemistry and materials).
@Ryan-gf6bs Ай бұрын
Where do I get 50 micron aluminum foil? I cannot seem to find it anywhere. I see they sell up to 30 micron aluminum foil and also have really thick 500 micron sheets. Does thickness matter? I bought a 500 micron sheet but I am thinking that may not work well.
@claudiohomelab8181 Ай бұрын
The aluminum foil I used was made from an old plate from an off-set printing press. You can safely use 30 micron or even 500 micron sheets, no problem.
@josephmartin5142 5 ай бұрын
Hello Claudio. Have you managed to improve on resistance? I'm doing some research work at a British University and the internal resistance that your graphite sheet contributes would drain a supercapacitor in no time. Your thoughts. Regards J Martin
@claudiohomelab8181 5 ай бұрын
Hi Martin, I am aware of this problem, to improve I should be able to lower the resistance by an order of magnitude, which on the one hand would be easier to do using acetylene black, but I would like to solve it using low cost materials. Now I'm using these electrodes in making a Water-in-salt supercapacitor with NaClO4 electrolyte, we'll see what happens Regards Claudio
@josephmartin5142 5 ай бұрын
Hello Claudio, Would pouring the graphite foil directly on to the aluminium collector with the mould to limit its spread not eliminate one of the passages in making the electrode? Would there be any negative alterations to its performance? Thanks J
@claudiohomelab8181 5 ай бұрын
Hello Joseph, I can't print the graphite foil directly on the aluminum foil because the foil shrinks during drying and due to the stiffness of the aluminium would result in a completely cracked foil. Look here: kzfaq.info/get/bejne/ebCeitRksuCxfqM.html at 07:29 As you can see the foil contracted but the thin plastic sheet followed its deformation and the foil is perfectly intact.
@josephmartin5142 5 ай бұрын
Yes, I should have thought6 of that myself. Thanks J@@claudiohomelab8181
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