All Solid State Li-Ion Batteries based on New Ceramic Li-ion Electrolytes (SLIB)
a Nyquist plot of c-Li6.4Ga0.2La3Zr2O12, obtained at RT in air using Pt electrodes (1 MHz to 1 Hz).
b A typical pellet of c-Li6.4Ga0.2La3Zr2O12 with Pt electrodes and contacts used for AC measurements.
c STEM images and elemental mapping of c-Li6.4Ga0.2La3Zr2O12 (Zr red, Ga blue, La green)displaying the homogeneous distribution of Zr, La and Ga.
Scope of project
The SLIB project focuses on new and safe solid state materials and device design concepts for next generation, all solid state, Li+-ion rechargeable batteries, offering an alternative to current liquid/polymer based Li+-ion batteries. New doped garnet and perovskite electrolytes, and lithium-alloys will be synthesised and studied in depth. In particular, an investigation of the fundamentals of transport and storage of Li+-ions and electrons in relation to structural defects will be focused on. Results for tests in "solid state" half-cells will be compared with standard liquid/polymer electrolyte based battery cells. Computation and innovative in-situ experiments to elucidate the interaction between structure and Li+-ion transport will validate and strengthen experimental findings. Individual solid state battery components for large cells will be fabricated by sintering powders.
Miniaturization of the all-solid-state battery using thin film techniques to form a microbattery is suggested as an alternative to capacitor-like structures. All applications of Li+-ion rechargeable batteries including stationary energy storage, electric vehicle power supplies, and portable electronics would benefit from the new insights into solid state electrolyte materials presented in the SLIB project. We promise ways to drastically increase safety while pushing up energy density and long term durability.
Prof. Dr. Jennifer Rupp
ETH Zürich, Professorship Electrochemical Materials
Phone: +41 44 633 04 51