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An Autonomous Electrochemical Test stand for Machine Learning Informed Electrolyte Optimization

preprint
submitted on 11.10.2019, 17:12 and posted on 16.10.2019, 06:14 by Jay Whitacre, Jared Mitchell, Adarsh Dave, Sven Burke, Venkatasubramanian Viswanathan

A fully automated, computer-controlled test stand capable of rapidly creating and electrochemically characterizing any arbitrary liquid electrolyte solution is described. Hundreds of different electrolytes were studied, and the results were used to verify the precision and accuracy of the system. To test the functionality of the approach, several 2-dimensional co-solvated electrolyte solutions containing blends of aqueous sulfates and nitrates were rapidly created and examined automatically. The test stand took less than a day to conduct these searches, while conventional manual methods would have taken much longer. The demonstrated standard error of the test-stand was 0.5 mS/cm on conductivity and 0.02 V for voltage stability window measurements, and several of the combinations studied revealing surprisingly high voltage stability and conductivity values. The demonstrated success of the test-stand in a 2-dimensional search spaces shows the promise of conducting high speed co-optimization studies of liquid electrolytes in particular when used in concert with a machine learning-based real time/in-loop data assessment computational package.


Funding

This work was funded by the Toyota Research Institute under the AMDD program, with some additional support from the Scott Institute for Energy Innovation at Carnegie Mellon University

History

Email Address of Submitting Author

venkvis@cmu.edu

Institution

Carnegie Mellon University

Country

USA

ORCID For Submitting Author

0000-0003-1060-5495

Declaration of Conflict of Interest

No Conflict of Interest

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in Journal of The Electrochemical Society

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