Nanostructured Electrolytes for Stabilizing Lithium Metal Anodes

First evidence for salt-induced improvement of long-range order in block copolymer electrolytes for enabling lithium metal anodes

Scientific Achievement

The addition of salt to block copolymers results in the spontaneous and surprising formation of well-ordered lamellae in a sample that originally had a disordered morphology.

Significance and Impact

The geometry of ion-conducting pathways (bright domains) is crucial for both prevention of dendrite formation at the lithium metal anode and for conducting ions between the battery electrodes.

Research Details

  • The morphology-conductivity relationship of a solid block copolymer electrolyte was studied by combining X-ray scattering, electron microscopy and electrochemical characterization.
  • Conductivity data contained three separate local maxima that had not been previously identified.
  • The maxima were related to morphological transitions.

DOI: 10.1021/acs.macromol.7b02415

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