Dresden 2017 – scientific programme

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SYLI: Symposium Interfacial Challenges in Solid-State Li Ion Batteries

SYLI 2: Interface-dominated behaviour

SYLI 2.4: Talk

Monday, March 20, 2017, 16:30–16:45, IFW A

Development of Bulk-type All-Solid-State Lithium-ion Battery Based on Phosphate Backbone Materials — •Shicheng Yu, Hermann Tempel, Andreas Mertens, Deniz Cihan Gunduz, Svenja Benning, Roland Schierholz, Florian Hausen, Hans Kungl, and Rüdiger-A Eichel — Forschungszentrum Jülich, Institute of Energy and Climate Research, IEK-9, D-52425 Jülich, Germany

Considerable efforts have been devoted to the development of thick-film solid-state batteries while less achievement has been published owing to the poor interfacial compatibility between electrodes and electrolytes as well as low lithium ion transfer kinetics in solid materials. Here, we demonstrate the fabrication and performance of thick-film monolithic all-phosphate ceramic solid-state Li-ion batteries with high power density and cycling stability at ambient temperature based on LiTi2(PO4)3/C//Li1.3Al0.3Ti1.7(PO4)3//Li3V2(PO4)3/C. Theoretically, due to the crystal structure matchup of LiTi2(PO4)3, Li1.3Al0.3Ti1.7(PO4)3 and Li3V2(PO4)3, the solid-solid interface between Li1.3Al0.3Ti1.7(PO4)3 electrolyte and LiTi2(PO4)3 anode is expected to facilitate smooth contact while partially matched on the other side for the solid-solid contact of solid electrolyte and Li3V2(PO4)3 cathode. Besides, the operation voltage of the electrode pair is highly matched with the electrochemical window of solid electrolyte. Excitingly, by optimizing the morphology of electrode materials and composition of each layer, the all-solid-state lithium-ion battery, which has a controllable thickness from 0.7 up to 2 mm, showed high capacity and more than 300 stable cycles.