zeiss_microscopy ZEISS Microscopy zeiss_microscopy August 10, 2018

Battery research, in the context of electro mobility, has moved into focus of materials scientists’ research lately. One challenge is the optimization of the life cycle after a number of charging/ discharge cycles. An unused #battery is often included in the investigations for reference. When performing these analyses, it is advantageous to cover large areas of the sample. This #application video shows an excerpt of a multi-modal microscopic investigation of an unused pouch cell type lithium-ion battery. The analysis correlates light and scanning electron #microscopy. The foils of an anode (A), a separator (S) and a cathode (K) have been mounted on a 25 mm SEM sample stub. The first 10 seconds of the video show an overlay image composed of a light microscopic overview image, acquired with #ZEISS Axio Imager Vario, overlaid with a detailed image of the cathode foil with an area of 1 mm2, acquired by ZEISS MultiSEM 505, the fastest scanning #electron #microscope of the world using 61 electron beams in parallel. The following sequence shows how you can #zoom in from a field of view covering 1 mm2 to a field of view of 10 µm, being able to #resolve the cathode #material in finest #detail. Note that the area covered here consists of 15.625.000.000 image #pixels. The last 10 seconds takes the viewer back to the overview image again. The individual images were acquired using the secondary electron signal at 1keV landing energy with 8 nm pixel size and 400 ns pixel dwell time. Acquisition time for the entire area of ~1 mm² was less than 7 minutes – including stage movement and image stitching. - For comparison: a state-of-the-art single #SEM using the same imaging parameters needs almost 3 hours to acquire the same area. Sample courtesy: U. Golla-Schindler & T. Bernthaler, IMFA, #Institute for Materials #Research, #University Aalen.

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