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Zhang G.,TUM CREATE 1 Create Way | Zhang G.,Nanyang Technological University | Wu H.B.,Nanyang Technological University | Hoster H.E.,TUM CREATE 1 Create Way | And 2 more authors.
Energy and Environmental Science | Year: 2014

A facile two-step strategy involving a polyol method and subsequent thermal annealing treatment is successfully developed for the general synthesis of metal oxide/carbon coaxial nanocables. Benefitting from the strong coupling effect, these hybrid nanocables exhibit remarkable lithium storage properties with high capacity, long cycle life and excellent rate capability. This journal is © 2014 The Royal Society of Chemistry.

Arun N.,TUM CREATE 1 Create Way | Arun N.,Nanyang Technological University | Aravindan V.,Nanyang Technological University | Jayaraman S.,National University of Singapore | And 5 more authors.
Nanoscale | Year: 2014

We report for the first time the synthesis and extraordinary performance of a high voltage spinel LiNi0.5Mn1.5O4 fiber cathode in all one dimensional (1D) architecture. Structural and morphological features are analyzed by various characterization techniques. Li-insertion/extraction properties are evaluated in a half-cell assembly (Li/LiNi0.5Mn1.5O4) and subsequently in full-cell configuration with an anatase TiO2 fiber anode. In both half- and full-cell assemblies, gelled polyvinylidene fluoride-co- hexafluoropropylene (PVdF-HFP) is used as the separator-cum-electrolyte. All the one dimensional components used for fabricating Li-ion cells are prepared by a simple and scalable electrospinning technique. The full-cell, LiNi 0.5Mn1.5O4/gelled PVdF-HFP/TiO2 delivered the reversible capacity of ∼102 mA h g-1 at 0.1 C rate with an operating potential of ∼2.8 V. Excellent rate capability and stable cycling profiles are noted for such a full-cell assembly with a capacity retention of ∼86% after 400 cycles. This journal is © the Partner Organisations 2014.

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