Login / Signup

Anthraquinone Covalent Organic Framework Hollow Tubes as Binder Microadditives in Li-S Batteries.

Can GuoMing LiuGuang-Kuo GaoXi TianJie ZhouLong-Zhang DongQi LiYifa ChenShun-Li LiYa-Qian Lan
Published in: Angewandte Chemie (International ed. in English) (2021)
The exploration of new application forms of covalent organic frameworks (COFs) in Li-S batteries that can overcome drawbacks like low conductivity or high loading when typically applied as sulfur host materials (mostly ≈20 to ≈40 wt % loading in cathode) is desirable to maximize their low-density advantage to obtain lightweight, portable, or high-energy-density devices. Here, we establish that COFs could have implications as microadditives of binders (≈1 wt % in cathode), and a series of anthraquinone-COF based hollow tubes have been prepared as model microadditives. The microadditives can strengthen the basic properties of the binder and spontaneously immobilize and catalytically convert lithium polysulfides, as proved by density functional calculations, thus showing almost doubly enhanced reversible capacity compared with that of the bare electrode.
Keyphrases
  • solid state
  • ion batteries
  • solar cells
  • reduced graphene oxide
  • molecularly imprinted
  • molecular dynamics simulations
  • metal organic framework
  • molecular dynamics
  • mass spectrometry
  • highly efficient
  • low cost