Graphene-Wrapped Anatase TiO2 Nanofibers as High-Rate and Long-Cycle-Life Anode Material for Sodium Ion Batteries.

ABSTRACT: Anatase TiO2 has been suggested as a potential sodium anode material, but the low electrical conductivity of TiO2 often limits the rate capability, resulting in poor electrochemical properties. To address this limitation, we propose graphene-wrapped anatase TiO2 nanofibers (rGO@TiO2 NFs) through an effective wrapping of reduced graphene oxide (rGO) sheets on electrospun TiO2 NFs. To provide strong electrostatic interaction between the graphene oxide (GO) sheets and the TiO2 NFs, poly(allylamine hydrochloride) (PAH) was used to induce a positively charged TiO2 surface by the immobilization of the -NH3(+) group and to promote bonding with the negatively charged carboxylic acid (-COO(-)) and hydroxyl (-O(-)) groups on the GO. A sodium anode electrode using rGO@TiO2 NFs exhibited a significant

SUBMITTER: Yeo Y 

PROVIDER: S-EPMC4564728 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature