Chemically grafting nanoscale UIO-66 onto polypyrrole nanotubes for long-life lithium–sulfur batteries

A versatile strategy for a facile approach to chemical graft MOFs onto polypyrrole nanotubes (PPyNTs@MOFs) is designed and fabricated rationally by means of 1,4-dibromobutane linkage. Various MOFs arranged randomly close-packed on PPyNTs, including Co2+, Cu2+, Zn2+, Mn2+, Fe3+, Al3+, Ti4+, Cr4+, Zr4+ and V4+, have been synthesized successfully. The as-prepared PPyNT@UIO-66 hybrids, used as a cathode carrier, exhibit excellent cyclic stability in Li–S batteries via strong physical and chemical adsorption/affinity with polysulfides.