PlumX Metrics
Embed PlumX Metrics

Polymer-in-Ceramic Nanocomposite Solid Electrolyte for Lithium Metal Batteries Encompassing PEO-Grafted TiO Nanocrystals

Journal of the Electrochemical Society, ISSN: 1945-7111, Vol: 167, Issue: 7
2020
  • 29
    Citations
  • 0
    Usage
  • 41
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    29
    • Citation Indexes
      28
    • Policy Citations
      1
      • Policy Citation
        1
  • Captures
    41

Article Description

Lithium Metal Batteries (LMB) require solid or quasi-solid electrolytes able to block dendrites formation during cell cycling. Polymer-in-ceramic nanocomposites with the ceramic fraction exceeding the one normally used as the filler (>10 ÷ 15 wt%) are among the most interesting options on the table. Here, we report on a new hybrid material encompassing brush-like TiO nanocrystals functionalized with low molecular weight poly(ethylene oxide) (PEO). The nanocomposite electrolyte membranes are then obtained by blending the brush-like nanocrystals with high molecular weight PEO and LiTFSI. The intrinsic chemical compatibility among the PEO moieties allows a TiO content as high as ∼39 wt% (90:10 w/w functionalized nanocrystals/PEO-LiTFSI), while maintaining good processability and mechanical resistance. The 50:50 w/w nanocomposite electrolyte (18.8 wt% functionalized TiO) displays ionic conductivity of 3 × 10 S cm at 70 °C. Stripping/plating experiments show an excellent long-term behavior even at relatively high currents of 200 μA cm. Upon testing in a lab-scale Li/electrolyte/LiFePO cell, the material delivers 130 mAh g and 120 mAh g after 40 and 50 cycles at 0.05 and 0.1 mA, respectively, with Coulombic efficiency exceeding 99.5%, which demonstrates the very promising prospects of these newly developed nanocomposite solid electrolyte for future development of LMBs.

Provide Feedback

Have ideas for a new metric? Would you like to see something else here?Let us know