Nanoscale Mapping of Extrinsic Interfaces in Hybrid Solid Electrolytes

Marm B. Dixit, Wahid Zaman, Nicholas Hortance, Stella Vujic, Brice Harkey, Fengyu Shen, Wan Yu Tsai, Vincent De Andrade, X. Chelsea Chen, Nina Balke, Kelsey B. Hatzell

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Inorganic-organic hybrid solid electrolytes are promising material systems for all solid-state batteries (ASSBs). These electrolytes contain numerous solid|solid interfaces that govern transport pathways, electrode|electrolyte compatibility, and durability. This paper evaluates the role that electrode|electrolyte interfaces and electrolyte structure have on electrochemical performance. Atomic force microscopy techniques reveal how mechanical, adhesion, and morphological properties transform in a series of model hybrid solid electrolytes. These measurements are mapped to sub-surface microstructural features using synchrotron nano-tomography. Hybrid solid electrolytes with shorter polymer chains demonstrate a higher adhesion (>100 nN), Young's Modulus (6.4 GPa), capacity (114.6 mAh/g), and capacity retention (92.9%) than hybrid electrolytes with longer polymer chains (i.e., higher molecular weight). Extrinsic interfacial properties largely dictate electrochemical performance in ASSBs. Microstructural control over inorganic constituents may provide a means for tailoring interfacial properties in hybrid solid electrolytes.

Original languageEnglish (US)
Pages (from-to)207-221
Number of pages15
JournalJoule
Volume4
Issue number1
DOIs
StatePublished - Jan 15 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Energy(all)

Keywords

  • atomic force microscopy
  • characterization
  • experimentation
  • solid electrolyte
  • solid-state battery
  • synchrotron

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