Reducing Interfacial Resistance in Garnet-Structured Solid-State Lithium-Ion Batteries
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Date
2020-05
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Publisher
The Ohio State University
Abstract
While the development of conventional lithium-ion (Li-ion) batteries has reached mature
stage, a number of battery researchers are already looking forward to replace the liquid
electrolytes in conventional lithium-ion batteries to solid-state electrolyte due to its improved
safety and larger volumetric energy density. Among the various solid electrolyte materials,
inorganic Li6.75La3Zr1.75Ta0.25O12 (LLZTO) compound with garnet phase has drawn significant
attention due to its stability in contact with metallic Li. However, the most critical challenge in
achieving a high-performance solid-state battery with LLZTO electrolytes is the high interfacial
resistance between the electrolyte and electrode materials. In this study, I synthesized LLZTO
powder. Then dense LLZTO electrolyte pellets will be made by using sintering method. During
the sintering process, I continuously adjusted the sintering temperature to increase the relative
density of the LLZTO pellets. Finally, the bulk conductivity of sintered LLZTO pellets was
measured by electrochemical impedance spectroscopy (EIS) technique.
Description
Undergraduate Honor Research Scholarship
Keywords
Lithium-Ion Batteries, Interfacial Resistance, Solid-State