WEB Multi-scale 3D imaging approaches for analysis of lithium ion battery electrode microstructuresWednesday (23.09.2020) 16:50 - 17:20 C: Characterization 1 Part of:
Deep knowledge of the 3D microstructure is essential for optimizing performance in Lithium ion batteries electrodes. Tomography methods like focused ion beam-secondary electron microscopy (FIB-SEM) and X-ray tomography are the most frequently used 3D characterization techniques for battery electrodes. While each method has advantages and disadvantages, understanding the complex morphology of electrodes requires a complementary, multi-scale 3D approach.
We present here results from two case studies where lithium ion battery electrodes were imaged and analyzed across different length scales, and with different modalities in a correlative manner. First, results from imaging a LiNiCoAlO2-LiCoO2 blend cathode from a commercial cell are presented where both 3D x-ray microscopy and FIB-SEM tomography were used to reveal a complex 3D microstructure. Next, we discuss results from multi-scale x-ray microscopy analysis of a commercial graphite anode where both micro- and nano-scale x-ray microscopy reveal complementary details on the transport network within the electrode. Implications towards material simulation and modeling results will be briefly discussed for each case.