Assessment of all-solid-state lithium-ion batteries

• Published in: Journal of power sources Vol. 393; pp. 119 - 127
• Main Authors: Braun, P., Uhlmann, C., Weiss, M., Weber, A., Ivers-Tiffée, E.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 31.07.2018
• Subjects: All-solid-state battery; Composite electrodes; Ragone-diagram; Transmission line model; All-solid-state battery; Transmission line model; Ragone-diagram; Composite electrodes
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2018.04.111

All-solid-state lithium-ion batteries (ASSBs) are considered as next generation energy storage systems. A model might be very useful, which describes all contributions to the internal cell resistance, enables an optimization of the cell design, and calculates the performance of an open choice of cell architectures. A newly developed one-dimensional model for ASSBs is presented, based on a design concept which employs the use of composite electrodes. The internal cell resistance is calculated by linking two-phase transmission line models representing the composite electrodes with an ohmic resistance representing the solid electrolyte (separator). Thereby, electrical parameters, i.e. ionic and electronic conductivity, electrochemical parameters, i.e. charge-transfer resistance at interfaces and lithium solid-state diffusion, and microstructure parameters, i.e. electrode thickness, particle size, interface area, phase composition and tortuosity, are considered as the most important material and design parameters. Subsequently, discharge curves are simulated, and energy- and power-density characteristics of all-solid-state cell architectures are calculated. These model calculations are discussed and compared with experimental data from literature for a high power LiCoO2-Li10GeP2S12/Li10GeP2S12/Li4Ti5O12-Li10GeP2S12 cell. •Modeling of all-solid-state lithium-ion batteries.•Introduction of a development tool for all-solid-state batteries.•Assessment of the energy-/power-density characteristics of all-solid-state batteries.•Presentation of a two-phase transmission line model for all-solid-state composite electrodes.