Confined SnO2 quantum-dot clusters in graphene sheets as high-performance anodes for lithium-ion batteries.

ABSTRACT: Construction of metal oxide nanoparticles as anodes is of special interest for next-generation lithium-ion batteries. The main challenge lies in their rapid capacity fading caused by the structural degradation and instability of solid-electrolyte interphase (SEI) layer during charge/discharge process. Herein, we address these problems by constructing a novel-structured SnO2-based anode. The novel structure consists of mesoporous clusters of SnO2 quantum dots (SnO2 QDs), which are wrapped with reduced graphene oxide (RGO) sheets. The mesopores inside the clusters provide enough room for the expansion and contraction of SnO2 QDs during charge/discharge process while the integral structure of the clusters can be maintained. The wrapping RGO sheets act as electrolyte barrier and conductive rei

SUBMITTER: Zhu C 

PROVIDER: S-EPMC4867637 | biostudies-literature | 2016 May

REPOSITORIES: biostudies-literature