Characterization of Material and Energy Device with Electrochemical Impedance Spectroscopy (EIS)

Xueyuan (John) Zhang
Material Engineer/Senior Instrumentation Specialist
Gamry Instruments Inc.

Xueyuan (John) Zhang works at Gamry Instruments Inc. as a material engineer/senior instrumentation specialist. His present interests are focused on harmonic techniques and electrochemical impedance spectroscopy used in electrochemistry fields relating to lithium ion battery, fuel cell, corrosion, coating, etc. Zhang obtained his PhD at the Institute of Metal Research, Chinese Academy of Science, with partial education and training at the Royal Institute of Technology in Sweden, and then a postdoctoral fellow at the University of California at Berkeley. In his professional career, Zhang has held the following positions: research scientist at Western University (University of Western Ontario) in Canada; associate professor at Institute of Metal Research, Chinese Academy of Science; and adjunct professor at Hunan University. He has supervised Ph.D. graduates in electrochemistry and corrosion fields. He also acts as the symposium chair at international conferences relating to electrochemistry, corrosion, and materials. He has published more than 80 refereed journal articles, 20 conference proceedings papers, two books in Chinese, and two translations books. In 2014, he was involved in the translation of the following book into Chinese, Electrochemical Impedance Spectroscopy by Mark E. Orazem and Bernard Tribollet, which was published by Chemical Industry Press in China. He also serves as Vice Chair at NACE Liberal Bell Branch.

Jacob Ketter
Instrumentation Chemist
Gamry Instruments Inc.

Jacob Ketter is an Instrumentation Chemist at Gamry Instruments. He received a Ph.D. in Chemistry from the University of North Carolina (UNC) at Chapel Hill in 2005, where his Research Advisor was Mark Wightman. After graduating, Ketter spent a year and a half at a postdoctoral appointment with Chad Mirkin at Northwestern University in Evanston, Illinois, working on electrodeposition, sensors, and nanomaterials. He received his B.S. in Chemistry from the University of Kansas in Lawrence. Ketter has assisted with instruction at an annual short course on Electrochemical Impedance Spectroscopy (EIS) and conducts training in electrochemical measurement for researchers and engineers in the energy and corrosion fields. At UNC, he specialized in making electrogenerated chemiluminescence measurements with ultramicroelectrodes at high efficiency and high speed. He also taught an EIS course at Nelson Mandela University in South Africa and gave presentations on EIS instrumentation.

Lei Yu
Associate Professor of Chemistry
Rowan University

Lei Yu is an Associate Professor of Chemistry at Rowan University. He received a Ph.D. in Chemistry at Changchun Institute of Applied Chemistry in 1998. After graduating, he completed postdocs at Oakland University in Michigan and Clemson University in South Carolina. He joined Rowan University in 2008. He also acted as editor for the Biochemistry and Physiology journal from 2011 to 2013 and as chair for the South Jersey Section of the American Chemical Society in 2015. His current research interests are in the areas of analytical chemistry, bioanalytical chemistry, and materials characterization. His active research projects include: ionic liquid solutions properties and applications in energy storage devices such as batteries, supercapacitors, and fuel cells; electrochemistry in ionic liquid electrolyte solutions; chemical sensors/biosensors; health and environmental effects of nanoparticles, and characterization and applications of porous carbon materials. Expertise used by Yu and his students include Electrochemistry, Spectroscopy (AAS, ICP-MS, FTIR, UV-Vi), Viscosity/Rheology measurements, Conductivity Measurements, Surface Plasmon Resonance, and Chromatography.