All-solid-state batteries: Interface modification/engineering of solid electrolytes for enhanced lithium transport properties

Developing high safety Li-ion battery technology is essential for high energy, and long-range applications. However, the current state-of-the-art Li-ion battery technology cannot fulfill the industry requirements due to its theoretical limitations. All solid-state Li-ion batteries (ASSLiB) using inorganic solid-state Li-ion conductors, holds promising features of high energy density, and enhanced safety over conventional Li-ion batteries. Among various solid electrolytes, garnet oxide-based exhibits the great advantage owing to its excellent lithium-ion conductivity (1.1 mS/cm at RT) and good chemical stability in contact with lithium metal. However, the commercial utilizations of solid-state battery hampered due to the brittle, and rigid nature of solid electrolyte, and also interface issues in the integration of active electrodes and solid-state electrolyte. The poor interfacial contact between the electrodes and electrolyte causes the high interfacial resistance, inhomogeneous current distributions, dendrite formation, and large cell polarizations etc. Hence, herein we proposed to give utmost importance to make intimate contact between the active electrodes and solid electrolytes by surface engineering/modification techniques to reduce the interfacial resistance of ASSLiB test cells.

Faculty Supervisor:

Seonghwan Kim

Student:

Partner:

MakeSens Advanced Battery Materials

Discipline:

Engineering

Sector:

Advanced Manufacturing; Clean Technology; Nanotechnology

University:

University of Calgary

Program: