Journal
ENERGY STORAGE MATERIALS
Volume 40, Issue -, Pages 239-249Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2021.05.001
Keywords
Solid state battery; Composite cathode; Energy density; Architecture
Funding
- Laboratory Directed Research and Development (LDRD) Program at Oak Ridge National Laboratory [DE-AC05-00OR22725]
- Office of Energy Efficiency and Renewable Energy (EERE) Vehicle Technologies Office (VTO) Applied Battery Research subprogram
- Alvin M. Weinberg Fellowship at the Oak Ridge National Laboratory
Ask authors/readers for more resources
Next generation solid-state batteries require optimization of composite cathode architecture to achieve high-energy density and high-performance goals. This study presents a framework for geometric modeling of composite cathode architectures and evaluates the impact on cell-level energy density.
Next generation solid-state batteries (SSB) will need to leverage high voltage cathodes, as well as metallic anodes to achieve the realistic performance targets necessary to replace liquid electrolyte-based batteries in cutting-edge applications including electric vehicles. However, limitations arising from mass and charge transports, kinetics and chemo-mechanical degradation at the electrode vertical bar electrolyte interface limit the performance of present day SSBs. Optimizing composite cathode architecture, which is an integral part of solid-state batteries, is vital to realize the high-energy density and high-performance goals for next-generation solid-state batteries. Cathode architecture needs to be optimized for high loadings of active material, well-percolated ion and electron transport pathways and increased resilience against electrochemical stresses. This paper provides a first report of framework for geometric modeling of composite cathode architectures and evaluates the impact of cathode architecture on cell-level energy density using hierarchical models. Packing around primary and secondary active material particles are simulated for a range of active material particle size and solid electrolyte size distributions in the composite cathode. Impact of packing architecture on processing parameters of a given cathode composition and thickness, as well as on achievable energy density is evaluated for a range of commonly used solid electrolyte and cathode materials. Overall, the proposed framework offers a facile exploratory methodology for establishing initial metrics for scalable processing of practical and competent SSBs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available