(430d) Visualising Reactivity at Electrified Interfaces with the Surface Forces Apparatus: From Corrosion to SEI Formation on Li-Anodes
AIChE Annual Meeting
2019 AIChE Annual Meeting
Engineering Sciences and Fundamentals
Tribute to Jacob Israelachvili II (Invited Talks)
Tuesday, November 12, 2019 - 4:40pm to 5:00pm
In this presentation I will highlight recent advances in characterizing electrochemical interfaces with the electrochemical surface forces apparatus (EC-SFA), ranging from the real-time measurement of corrosion rates in confined localized areas to the electrochemical growth of solid electrolyte interfaces on Li-battery anodes.
First, I will show that the real-time capability of the electrochemical SFA allows us to visualize oxide reduction/oxidation processes of noble metal catalysts in real-time with sub-nanometer resolution, and it provides detailed insight into the structure of the electric double layer under varying charging conditions, including the charging dynamics in confined areas.
I will further demonstrate how multiple-beam-interferometry (MBI) in reflection mode can be utilized as a real-time monitoring tool for corrosion of nanometer confined bulk metallic surfaces and metallic thin films. I will demonstrate capabilities of reflection mode MBI, comparing the initial crevice corrosion mechanism on confined nickel and a Ni75Cr16Fe9 alloy in real time.
Finally, I will demonstrate that employing an electrochemical surface forces apparatus also provides unique insight into the growth and the emerging mechanical properties of interfacial decomposition products forming the so-called solid-electrolyte interphase (SEI) of a Li ion battery.