Building an Open-Source Hardware Flow Battery Development Kit

Parts

• 10 cm of 1/8" outside diameter hard plastic tubing - 1/8 inch OD PTFE tubing works well
• 200 g of 3D printing feedstock
• 1 Arduino UNO R3 - or equivalent microcontroller that can output two independent 5V PWM signals and connect to PC over USB serial
• 2 current collectors
• 2 diaphragm pumps
• 160 cm² of gasket sheet - Dimensions must be at least enough to cut out approx. four 6 cm x 8 cm rectangles, an A4 sheet is enough
• 150 cm² of grafoil
• some jumper wires
• 1 L298N motor driver - or equivalent
• 4 M6 nuts
• 4 M6 x 50 mm bolts
• 1 membrane
• A4 sheet separator sheet
• 2 meter of silicone tubing

Tools

• 1 1/8" drill bit
• 1 10 mm wrench - Adjustable or box end
• 1 3D printer
• 1 5mm hex key
• 1 drill - A hand drill or rotary tool (with steady hands) works, but a drill press is preferable
• 1 pair of chemical safety goggles
• 1 pair of nitrile gloves
• 1 PC - Must be able to flash firmware to microcontroller and connect over USB serial to microcontroller and potentiostat
• 1 potentiostat
• 1 sheet of sandpaper
• 1 scale
• 1 stir bar
• 1 stir plate
• 1 tubing cutter - Anything capable of producing a clean, square cut on plastic tubing withing deforming the tube
• 2 vial
• 1 vinyl cutter machine - or laser cutter or hand tools
• 1 vise
• 1 weighing spatula

Chemicals

• 5 grams of deionized water
• 5 grams of potassium iodide
• 5 grams of zinc chloride