Interface effects on self-forming rechargeable Li/I 2 -based solid state batteries
- PDF / 1,397,774 Bytes
- 6 Pages / 612 x 792 pts (letter) Page_size
- 25 Downloads / 260 Views
esearch Letter
Interface effects on self-forming rechargeable Li/I2-based solid state batteries Alyson Abraham, Department of Chemistry, Stony Brook University, Stony Brook, NY 11794, USA Mikaela R. Dunkin, Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY 11794, USA Jianping Huang, and Bingjie Zhang, Department of Chemistry, Stony Brook University, Stony Brook, NY 11794, USA Kenneth J. Takeuchi, Department of Chemistry, Stony Brook University, Stony Brook, NY 11794, USA; Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY 11794, USA Esther S. Takeuchi, and Amy C. Marschilok , Department of Chemistry, Stony Brook University, Stony Brook, NY 11794, USA; Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY 11794, USA; Energy Sciences Directorate, Brookhaven National Laboratory, Upton, NY 11973, USA Address all correspondence to Amy C. Marschilok at [email protected] (Received 21 January 2019; accepted 26 March 2019)
Abstract Solid state batteries are an emerging alternative to traditional liquid electrolyte cells that provide potential for safe and high-energy density power sources. This report describes a self-forming, solid state battery based on the Li/I2 couple using an LiI-rich LiI(3-hydroxypropionitrile)2 electrolyte (LiI–LiI(HPN)2). As the negative and positive active materials are generated in situ, the solid electrolyte–current collector interfaces play a critical role in determining the electrochemical response of the battery. Herein, we report the investigation of solid electrolyte–current collector interfaces with a self-forming LiI–LiI(HPN)2 solid electrolyte and the role of varying interface design in reducing resistance during cycling.
Introduction Solid state batteries have been identified as an emerging possibility for high density and safe electrochemical energy storage solutions. Much progress has been made to understand the role of ionic conductivity, composition, and structure of solid electrolytes for Li- and Na-based inorganic ion conductors.[1] A major challenge facing further development of solid state electrolytes is addressing interfacial issues that can occur between the solid electrolyte and active materials. Several strategies have been adapted to reduce interfacial resistance, mostly for garnet-based solid electrolytes including replacing the Li+ blocking lithium layer with the introduction of a Li+ conducting Li3N layer,[2] deposition of a 20 nm germanium layer to decrease garnet/Li-metal interfacial resistance by alloying,[3] the use of a liquid phase processed Li2SiO3 buffer layer between a garnet and nickel-manganese-cobalt oxide (NMC) interface,[4] and the use of atomic layer deposition to deposit an ultrathin Al2O3 coating on garnet solid electrolytes which demonstrated a decrease in interfacial area specific resistance from 1710 to 1 Ω/cm2.[5] An alternative solid state cell design concept starts with the solid electrolyte and curre
Data Loading...
