Interface-Mediated Electrochemical Effects in Lithium/Polymer-Ceramic Cells (POSTPRINT)

Abstract

This paper presents and discusses a method to achieve beneficial electrochemical effects mediated by interfaces in an ionic conducting polymer matrix. The beneficial effects include enhanced ionic transport, catalysis of anodic oxidation reaction, and stabilization of the lithium-electrolyte interface in lithium-based electrochemical cells. Polyethylene oxide (PEO) doped with LiN (SO2CF2CF3)2 (LiBETI) was chosen as the ion conducting polymer matrix. The polymerceramic (PC) composite electrolytes from the PEO:LiBETI-BN and PEO:LiBETI-Li2O systems were optimized to achieve high conductivity, reduce charge-transfer resistance, and stabilize the solid electrolyte interface (SEI) layer at the lithium anode. Both BN and Li2O were effective in enhancing interface-mediated lithium ion transport. The charge-transfer resistance was reduced by orders of magnitude and the long-term stability of the cells was improved remarkably.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2001
Accession Number
ADA529653

Entities

People

  • Binod Kumar
  • Jitendra Kumar
  • Stanley J. Rodrigues

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Aluminum Oxides
  • Cells
  • Charge Transfer
  • Chemistry
  • Composite Materials
  • Conductivity
  • Electric Fields
  • Electrical Properties
  • Electrochemical Cells
  • Electrolytes
  • Equivalent Circuits
  • Heat Of Activation
  • Impedance
  • Materials
  • Resistance

Fields of Study

  • Materials science

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Reinforced Composite Materials