Free-standing TiO2 nanograssy tubular hybrid membrane for polysulfide trapping in Li-S battery.During the growth of anodic TiO2 nanotubes with a high layer thickness of greater than 20 μm, "nanograss" structures are typically formed on the outermost surface.  These TiO2 nanotubular layers have a high aspect ratio with astonishing bundles of nanograss structures on the tube top and especially a high surface area with anatase crystallites in the tubes. 
TiO2
Free-standing TiO2 nanograssy tubular hybrid membrane for polysulfide trapping in Li-S battery.During the growth of anodic TiO2 nanotubes with a high layer thickness of greater than 20 μm, "nanograss" structures are typically formed on the outermost surface. 
Li-S battery