Template synthesis of a poly ionic liquid derived Fe1 xS nitrogen doped porous carbon membrane and its electrode application in lithium sulfur batteries

This study deals with the facile synthesis of Fe1 xS nanoparticle containing nitrogen doped porous carbon membranes denoted as Fe1 xS N PCMs via vacuum carbonization of hybrid porous poly ionic liquid PIL membranes, and their successful use as a sulfur host material to mitigate the shuttle effect in lithium sulfur Li S batteries. The hybrid porous PIL membranes as the sacrificial template were prepared via ionic crosslinking of a cationic PIL with base neutralized 1,10 ferrocenedicarboxylic acid, so that the iron source was molecularly incorporated into the template. The carbonization process was investigated in detail at different temperatures, and the chemical and porous structures of the carbon products were comprehensively analyzed. The Fe1xS N PCMs prepared at 900 1C have a multimodal pore size distribution with a satisfactorily high surface area and well dispersed iron sulfide nanoparticles to physically and chemically confine the LiPSs. The sulfur Fe1xS N PCM composites were then tested as electrodes in Li S batteries, showing much improved capacity, rate performance and cycle stability, in comparison to iron sulfide free, nitrogen doped porous carbon membrane

Colloidal dispersion of poly ionic liquid Cu composite particles for protective surface coating against SAR CoV 2

Herein, we report a waterproof anti SARS CoV 2 protective film prepared by spray coating of an aqueous colloidal dispersion of poly ionic liquid copper PIL Cu composite nanoparticles onto a substrate. The PIL dispersion was prepared by suspension polymerization of 3 dodecyl 1 vinylimdiazolium bromide in water at 70 C. The copper acetate salt was added into the PIL nanoparticle dispersion and in situ reduced into copper nanoparticles anchoring onto the PIL nanoparticles. Despite being waterborne, the PIL in bulk is intrinsically insoluble in water and the formed coating is stable in water. The formed surface coating by PIL copper composite nanoparticles was able to deactivate SARS CoV 2 virions by 90.0 in 30 minutes and thus may effectively prevent the spread of SARS CoV 2 through surface contact. This method may provide waterborne dispersions for a broad range of antivirus protective surface coatings for both outdoor and indoor application