@article{120526,
  author = {Y. L. Cao and X. L. Li and I.A. Aksay and J. Lemmon and Z. M. Nie and Z. G. Yang and J. Liu},
  title = {Sandwich-type functionalized graphene sheet-sulfur nanocomposite for rechargeable lithium batteries},
  abstract = { A functionalized graphene sheet-sulfur (FGSS) nanocomposite was synthesized as the cathode material for lithium-sulfur batteries. The structure has a layer of functionalized graphene sheets/stacks (FGS) and a layer of sulfur nanoparticles creating a three-dimensional sandwich-type architecture. This unique FGSS nanoscale layered composite has a high loading (70 wt\%) of active material (S), a high tap density of similar to 0.92 g cm(-3), and a reversible capacity of similar to 505 mAh g(-1) (similar to 464 mAh cm(-3)) at a current density of 1680 mA g(-1) (1C). When coated with a thin layer of cation exchange Nafion film, the migration of dissolved polysulfide anions from the FGSS nanocomposite was effectively reduced, leading to a good cycling stability of 75\% capacity retention over 100 cycles. This sandwich-structured composite conceptually provides a new strategy for designing electrodes in energy storage applications. },
  year = {2011},
  journal = {Physical Chemistry Chemical Physics},
  volume = {13},
  pages = {7660-7665},
  isbn = {1463-9076},
  language = {eng},
}