Composite Solid Polymer Electrolyte Membrane

Abstract

Due to safety issues in the lithium batteries with organic liquid electrolytes, it is expected that the next-generation safe lithium batteries would be the all-solid-state batteries. New solid electrolytes with high Li+ ion conduction such as Li10GeP2S12, Li1.3Al0.3Ti1.7(PO4)3 and Li7La3Zr2O12 have attracted extensive attentions in the development of solid-state batteries. Especially, the garnet-type material Li7La3Zr2O12 has several advantageous properties such as good thermal and chemical stability with lithium metal anode, environmental compatibility, relatively high Li+ion conductivity. However, the poor contact between electrodes and electrolyte is a most important factor limiting the development of LLZO all-solid-state battery. So we combining P(VDF-HFP) polymer electrolyte and LLZO powder and painting it on the fiberglass to construct composite solid polymer electrolyte. The SEM micrographs of the with 30wt% LLZO added are shown in Fig.1. There are obvious powder have attaching to the fiberglass surface and the polymer on it. Fig.2. compared rate capability of the composite solid polymer electrolyte film and the fiberglass. Founding that the composite system can obviously increasing it. Fig.1 SEM micrographs of the composite solid polymer electrolyte. Fig.2 Rate capability of the composite solid polymer electrolyte film and the fiberglass. Acknowledgements The project was supported by the National Natural Science Foundation of China (21373137), Shanghai Science and Technology Development Fund (15DZ2282000) and the Foundation of China (NSFC21373137). Figure 1