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REPORT OF THE BASIC RESEARCH NEEDS WORKSHOP advanced characterization tools for imaging, spectroscopy, and diffraction based on X-ray scattering, electron scattering, neutron scattering, and nuclear magnetic resonance have been developed for operando and in situ monitoring of electrodes, electrolytes, and their interfaces. As shown in Figure 2.5.5, this suite of tools covers a wide range of phenomena on time scales from seconds to days and length scales from sub-nanometer at the materials level to millimeter at the device level. Together these tools provide the basis to achieve critical insights into battery degradation processes, particularly if employed in complementary combinations. Element-selective probes such as NMR spectroscopy allow tracking degradation products from electrolyte decomposition as they migrate from one electrode to the other.16 To address the breakdown of the organic solvent itself by standard means such as 13C or 17O NMR, it is necessary to use isotopic enrichment of the solvent, as the amount of solid-phase breakdown material on the electrode surfaces is expected to be relatively small.17 Atomic level Lattice level Strains Defects Ohmics mS Particle level Microstructure level Electrode level Scale Mechanical Chemical SOH changeElectricalPDF Image | Next Generation Electrical Energy Storage
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