This is a homemade battery made of aluminum. The high speed electromotor is from RC plane, which was previously powered by a lithium battery (3.2V).
Positive current collector: nickel
Positive active material: 3D graphite foam
Negative electrode: aluminium foil
DIY a High Voltage Zinc Battery: https://www.youtube.com/watch?v=feIwM3Am3WU
DIY a Electrolyte / Ionic liquid: https://www.youtube.com/watch?v=gxSRpFFqoc4
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