The general purpose of these designs are described in “Electrolysis Activation of Fused Filament Fabrication 3D Printed Electrodes for Electrochemical and Spectroelectrochemical Analysis”, which is published in the journal Analytical Chemistry. DOI:10.1021/acs.analchem.9b01331

This particular part is an extended version of the "standard electrode" that allows the entire "standard electrode" portion to rest in electrolyte solution during electrolysis when using the "electrolysis cell". We have printed this part using both ProtoPasta (https://www.proto-pasta.com/products/conductive-pla) and BlackMagic (http://www.blackmagic3d.com/default.asp) PLA-composite 3D printing filaments. Activation of the electrode (enhancement of the conductivity) can be achieved through either a soaking process or through an electrolysis process. Enhancement over 3 orders of magnitude have been experimentally determined using both methods.