posted on 2016-04-05, 00:00authored byLei Cheng, Joong Sun Park, Huaming Hou, Vassilia Zorba, Guoying Chen, Thomas Richardson, Jordi Cabana, Richard Russo, Marca Doeff
Al-substituted Li7La3Zr2O12 (LLZO) pellets with a grain size of 100–200 μm and a relative density of 94% were prepared by conventional solid-state processing at a sintering temperature of 1100 °C, 130 °C lower than previously reported. Morphological features and the presence of impurities were evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Femtosecond Laser Induced Breakdown Spectroscopy (LIBS) was used to visualize the distribution of impurities. The results suggest that chemical composition of the powder cover strongly affects morphology and impurity formation, and that particle size control is critical to densification. These properties, in turn, strongly affect total ionic conductivity and interfacial resistance of the sintered pellets.
Funding
This work was supported by the Assistant Secretary for Energy
Efficiency and Renewable Energy, Office of Vehicle Technologies
and the Chemical Sciences, Geosciences, and Biosciences
Division, Office of Basic Energy Sciences of the U.S. Department
of Energy under contract no. DE-AC02-05CH11231. The work of
VZ was supported by the U.S. Department of Energy, Small
Business Innovation Research Programs Office through Applied
Spectra, Inc. This document was prepared as an account of work
sponsored by the United States Government. While this document
is believed to contain correct information, neither the
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