HIGH-RESOLUTION TRANSMISSION ELECTRON MICROSCOPY OF LITHIATED MANGANESE OXIDES.

Using transmission electron microscopy, it is possible to examine the structural details of crystals on a sub-unit scale. Many manganese oxides are highly disordered and poorly crystalline and so the TEM provides a unique means for studying these materials. Results will be reviewed briefly obtained from EMD. Samples of lithiated EMD were obtained from Union Carbide Corporation (Parma, Ohio). The samples were given to us with the following percentage of lithiation: 100, 75, 50, 36. High-resolution transmission electron microscopy (HRTEM) was used to image the samples using the same procedures as we used on natural manganese oxides and other minerals. Selected-area electron diffraction (SAED) patterns were routinely obtained, both to identify phases and to orient crystals for HRTEM imaging. A Philips 400T 120kV and a JEOL 200CX 200kV TEM were used for the measurements. Results will be shown and discussed.