The Electrolab: An open-source, modular platform for automated characterization of redox-active electrolytes

Inkyu Oh, Michael A. Pence, Nikita G. Lukhanin, Oliver Rodríguez, Charles M. Schroeder, Joaquín Rodríguez-López

Research output: Contribution to journalArticlepeer-review


Electrochemical characterization of redox-active molecules in solution requires exploration of manifold conditions (e.g., concentration, electrolyte type, pH, ionic strength), leading to tedious and time-consuming experiments that are prone to user error. Here, we introduce the Electrolab, a modular, automated electrochemical characterization platform that seamlessly interfaces with common laboratory instrumentation and low-cost electromechanical components. We integrated a gantry-type robot carrying a multipurpose nozzle assembly to dispense and mix solutions as well as degas and clean a cell containing multiplexed microelectrochemical arrays. The system operates using Python code and a universal Arduino-based controller. We demonstrate the Electrolab by autonomously analyzing a redox mediator by performing 200 voltammograms and data analysis steps across a range of conditions. In addition, the Electrolab is used to titrate a redox-active polymer solution to identify conditions for optimizing electrochemical performance. Overall, the Electrolab device enables high-throughput, systematic exploration of redox electrolytes, opening new avenues for closed-loop optimization.

Original languageEnglish (US)
Article number100103
Issue number5
StatePublished - Nov 17 2023


  • automation
  • DTI-3: Develop
  • electrochemistry
  • microelectrodes
  • Python
  • redox flow
  • redox polymer
  • robotics
  • titration

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Condensed Matter Physics


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