Can you make a supercapacitor from kapton tape?  Yep!  Using a laser, we can decompose the Kapton (polyimide) into a graphene "foam" via a process known as Laser Induced Graphene.  This form of graphene makes an excellent material for electrostatic double-layer supercapacitors.  It has reasonable conductivity and a very large surface area due to the foamy nature, which allows good contact with the electrolyte.

📢Twitter: https://twitter.com/BreakingTaps

"Lin, Jian, et al. "Laser-induced porous graphene films from commercial polymers." Nature communications 5.1 (2014): 1-8." https://www.nature.com/articles/ncomms6714/

More papers on LIG: https://scholar.google.com/scholar?as_vis=1&q=%22laser+induced+graphene%22++polyimide&hl=en&as_sdt=1,46

0:00 Intro
0:48 Graphene
1:51 Laser Induced Graphene
3:07 Supercap structure
4:12 Expected voltage
4:36 Parallel plate capacitance vs Electrostatic double-layer
6:05 Stacking kapton to increase capacitance
7:04 Adding electrolyte and watching capacitance increase
7:37 Validating…

Перевел ejabberd во встроенного TURN/STUN сервера на внешний coturn, так как встроенный похоже разрывал звонки длительные. Сейчас тестим.
@akmtxc у тебя вроде тоже проблемы такие были в conversations, есть смысл потестить длительные звонки.

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