Journal
METALS
Volume 7, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/met7090372
Keywords
spark plasma sintering; all-solid-state Li-ion batteries; functionally graded electrodes; composite ceramic electrolyte
Funding
- U.S. Department of Energy, Materials Sciences Division [DE-SC0008581]
- San Diego State University Electron Microscopy Facility acquired by NSF instrumentation grant [DBI-0959908]
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Spark plasma sintering (SPS) has been successfully used to produce all-solid-state lithium-ion batteries (ASSLibs). Both regular and functionally graded electrodes are implemented into novel three-layer and five-layer battery designs together with solid-state composite electrolyte. The electrical capacities and the conductivities of the SPS-processed ASSLibs are evaluated using the galvanostatic charge-discharge test. Experimental results have shown that, compared to the three-layer battery, the five-layer battery is able to improve energy and power densities. Scanning electron microscopy (SEM) is employed to examine the microstructures of the batteries especially at the electrode-electrolyte interfaces. It reveals that the functionally graded structure can eliminate the delamination effect at the electrode-electrolyte interface and, therefore, retains better performance.
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