3 years ago

A promising TPU/PEO blend polymer electrolyte for all-solid-state lithium ion batteries

A promising TPU/PEO blend polymer electrolyte for all-solid-state lithium ion batteries
Solid polymer electrolyte (SPE) membranes composed of thermoplastic polyurethane (TPU), poly(ethylene oxide) (PEO) and lithium bis(trifluoromethane sulfonimide) (LiTFSI) are prepared and investigated in this work. The results show that addition of TPU to the blend polymer results in loss of the crystallinity of PEO and improve the dissolution of lithium salts into the SPE matrix. TPU can also improve the mechanical stability and the electrochemical properties. Among the TPU/PEO blend electrolytes, the TPU/PEO=1:3 based electrolyte presents an ionic conductivity of 5.3×10−4 Scm−1 with electrochemical stability above 5V (vs. Li+/Li) at 60°C. The LiFePO4/SPE/Li coin cell based on SPE (TPU/PEO=1:3) is assembled and shows the attractive discharge capacity (140 and 154mAhg−1 at 0.2C under 60 and 80°C, 112 and 127mAhg−1 at 1C under 60 and 80°C) and outstanding cycling stability (close to 96% and 94% after 100th cycles at 1C under 60 and 80°C), respectively. These results demonstrated that the TPU/PEO blend polymer electrolyte should be a promising electrolyte for all-solid-state lithium ion batteries.

Publisher URL: www.sciencedirect.com/science

DOI: S0013468617320960

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.