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Volume 8
Journal of Fundamentals of Renewable Energy and Applications
ISSN: 2090-4541
Battery Tech 2018
September 10-11, 2018
September 10-11, 2018 | London, UK
3
rd
International Conference on
Battery and Fuel Cell Technology
Current challenges in fabrication and operation of oxide-based all-solid-state Li-batteries
Martin Finsterbusch, Chih-Long Tsai, Anna Windmüller, Yulia Arinicheva, Hao Zheng, Sven Uhlenbruck, Dina Fattakhova-Rohlfing
and
Oliver Guillon
IEK-1 - Forschungszentrum Juelich GmbH, Germany
IEK-12 - Forschungszentrum Juelich GmbH, Germany
A
ll-solid-state Li-batteries (Li-ASBs) promise to alleviate many issues related to the use of organic liquid electrolytes in
conventional Li-Ion Batteries since they have the potential to simultaneously increase the energy and power density
while offering intrinsic safety and low degradation. They are thus intensely researched worldwide and are of high interest
to automotive and portable electronics applications. However, of the many materials and cell chemistries that are explored
in fundamental research, successful demonstrations on larger scales are still missing. Of all concepts, oxide based solid
electrolytes like the garnet structured Li
7
La
3
Zr
2
O
12
(LLZ) in combination with Li-metal anodes and thick mixed cathodes
promise the highest theoretical energy densities. To demonstrate functionality in larger cells, two main challenges are currently
faced during fabrication and one during operation of such large cells using a Li metal anode. For fabrication, scalable synthesis
methods for of LLZ itself and processing technologies for large area cell components need to be investigated. While LLZ
can be produced with a variety of methods on lab scale, the authors developed a process that allows for large quantities of
high quality powder to be synthesized using an industrial established process. Subsequent fabrication of high capacity mixed
cathodes requires not just electrochemical stability of the materials used, but also chemical stability at the elevated processing
temperatures of ASBs. Secondary phase formation at the electrolyte/cathode interface thus poses further challenges in cell
manufacturing. During operation of full all-solid-state cells using Li metal anodes, the difficulty of suppressing the growth of
Li dendrites is the main challenge. It is thus essential to understand dendrite formation in LLZ on a fundamental level in order
to find mitigation strategies, like the application of interlayers a concept successfully invented by the authors.
Figure 1:
Li dendrite formation in LLZ and suppression via buffer layer.
Recent Publications
1. Uhlenbruck S, Dornseiffer J, Lobe S, Dellen C, Tsai C L, Gotzen B, Sebold D, Finsterbusch M and Guillon O (2017)
Cathode-electrolyte material interactions during manufacturing of inorganic solid-state lithium batteries. Journal of
Electroceramics DOI 10.1007/s10832-016-0062-x.
2. Dellen C, Gehrke H G, Möller S, Tsai C L, Breuer U, Uhlenbruck S, Guillon O, Finsterbusch M and BramM (2016) Time
of flight - secondary ion mass spectrometry study of lithium intercalation process in LiCoO
2
thin film. Journal of Power
Sources 321:241-247.
3. Troy S, Schreiber A, Reppert T, Gehrke H G, Finsterbusch M, Uhlenbruck S and Stenzel P (2016) Life cycle assessment
and resource analysis of all-solid-state batteries. Applied Energy 169:757–767.
Martin Finsterbusch et al., J Fundam Renewable Energy Appl 2018, Volume 8
DOI: 10.4172/2090-4541-C5-062