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.