Probing the Critical Role of Sn Content in SnSb@C Nanofiber Anode on Li Storage Mechanism and Battery Performance.

ABSTRACT: The minimization of the detrimental effects as a result of the drastic volume changes (few hundred times) occurring during repeated alloying-dealloying of lithium with group IV elements, e.g., tin (Sn), is a major challenge. An important design strategy is to have Sn as a component in a binary compound. SnSb is an important example where the antimony (Sb) itself is redox active at a potential higher than that of Sn. The ability of Sb to alloy with Li reduces the Li uptake amount of Sn in SnSb compared to that in bare Sn. Thus, the volume changes of Sn in SnSb will expectedly be much lower compared to that in bare Sn, leading to greater mechanical stability and cyclability. As revealed recently, the complete reformation of SnSb (for a molar ratio of Sn/Sb = 1:1) during charging is not achie

SUBMITTER: Das S 

PROVIDER: S-EPMC6645569 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature