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EN06.04.01 : High Capacity All-Solid-State Sodium Metal Battery with Hybrid Polymer Electrolyte

5:00 PM–7:00 PM Apr 3, 2018

PCC North, 300 Level, Exhibit Hall C-E

Description
Yongwei Zheng1 Qiwei Pan1 Mallory Clites1 Bryan Byles1 Ekaterina Pomerantseva1 Christopher Li1

1, Drexel University, Philadelphia, Pennsylvania, United States

Recently, sodium has reattracted scientists' interest in using in rechargeable battery for its low cost and abundant amount compared with lithium. All-solid-state sodium metal battery is doomed to have promising future for its theoretically high capacity (1166mAh/g), non-flammability and low cost. Here, we fabricated a polyethylene oxide (PEO) based hybrid solid electrolyte which showed low glass transition temperature, absence of crystallization and ionic conductivity greater than 1×10-4 S/cm at 80 °C. The solid electrolyte showed low interface resistance (~100ohms at 80C) with sodium metal and high stability in cycling test, with Cd reaching 3000C/cm2 at current density 0.5mA/cm2. All-solid-state sodium metal battery using thermal-treated vanadium oxide as active material, the hybrid polymer as the electrolyte and separator, and pristine sodium metal as the anode. The battery showed excellent capacity (300mAh/g) and good coulombic efficiency. Detailed sodium dendrite growth and electrolyte depletion in have also been systematically studied. Our work showed that the hybrid network is promising for all-solid-state sodium battery applications.

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