EELS color map showing the distribution LiFePO4 (red) and FePO4 (green) particles from a battery electrode charged to half cycle
Paolo Longo, Ph.D., Gatan Inc. Sample courtesy of Dr. Joshua Sugar at Sandia National Lab, Livermore, CA

EELS color map showing the distribution LiFePO4 (red) and FePO4 (green) particles from a battery electrode charged to half cycle

Methods

FEI F20 TEM/STEM microscope; S-FEG emission gun; GIF Quantum® ER system; voltage: 200 kV; EFTEM SI mode from 680 – 730 eV; slit width: 2 eV ; step size: 1 eV; total exposure time: <4 min