title: Monodisperse and inorganically capped Sn and Sn/SnO2 nanocrystals for high-performance Li-ion battery anodes.
abstract: We report a facile synthesis of highly monodisperse colloidal Sn and Sn/SnO2 nanocrystals with mean sizes tunable over the range 9-23 nm and size distributions below 10%. For testing the utility of Sn/SnO2 nanocrystals as an active anode material in Li-ion batteries, a simple ligand-exchange procedure using inorganic capping ligands was applied to facilitate electronic connectivity within the components of the nanocrystalline electrode. Electrochemical measurements demonstrated that 10 nm Sn/SnO2 nanocrystals enable high Li insertion/removal cycling stability, in striking contrast to commercial 100-150 nm powders of Sn and SnO2. In particular, reversible Li-storage capacities above 700 mA h g(-1) were obtained after 100 cycles of deep charging (0.005-2 V) at a relatively high current of 1000 mA h g(-1).
authors: Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland.
authors: Kostiantyn
authors: K
authors: Kravchyk
authors: Loredana
authors: L
authors: Protesescu
authors: Maryna I
authors: MI
authors: Bodnarchuk
authors: Frank
authors: F
authors: Krumeich
authors: Maksym
authors: M
authors: Yarema
authors: Marc
authors: M
authors: Walter
authors: Christoph
authors: C
authors: Guntlin
authors: Maksym V
authors: MV
authors: Kovalenko