June 2012In-situ observation of lithium whisker deposition on the surface of a lithium ion-conducting solid electrolyte (pressed and sintered pellet). The electron microscope pictures show a sequence of potentiostatic lithium whisker deposition over a period of 20 h. The enclosed video gives the first 1.5 h in fast motion (28-fold speed). With the aid of a special experimental set-up it is possible to carry out in-situ electrochemical measurements in the scanning electron microscope. Different microelectrodes with tip diameters > 40 nm can be used to contact samples. In this experiment, an Au-microelectrode with a tip diameter of 25 µm was employed as working electrode and macroscopic lithium metal as counter electrode. By cathodic polarization of the microelectrode lithium whisker were deposited on the solid electrolyte and characterized electrochemically afterwards (not shown). (submitted by Rabea Dippel)https://www.uni-giessen.de/en/faculties/f08/departments/physchem/janek/gallerypotm/gallery-of-pictures-from-2012/june-2012/viewhttps://www.uni-giessen.de/@@site-logo/logo.png
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June 2012
In-situ observation of lithium whisker deposition on the surface of a lithium ion-conducting solid electrolyte (pressed and sintered pellet). The electron microscope pictures show a sequence of potentiostatic lithium whisker deposition over a period of 20 h. The enclosed video gives the first 1.5 h in fast motion (28-fold speed). With the aid of a special experimental set-up it is possible to carry out in-situ electrochemical measurements in the scanning electron microscope. Different microelectrodes with tip diameters > 40 nm can be used to contact samples. In this experiment, an Au-microelectrode with a tip diameter of 25 µm was employed as working electrode and macroscopic lithium metal as counter electrode. By cathodic polarization of the microelectrode lithium whisker were deposited on the solid electrolyte and characterized electrochemically afterwards (not shown). (submitted by Rabea Dippel)
