Christian Punckt - High-Rate Li+ Storage Capacity of Surfactant-Templated Graphene-TiO2 Nanocomposites

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  Publication Details (including relevant citation   information):

  Hsieh, Andrew G., Punckt, Christian, Aksay, Ilhan A. 162  A1566-A1573-

  Abstract: Graphene-TiO2 nanocomposites are a   promising anode material for Li-ion batteries due to their good   high-rate capacity, inherent safety, and mechanical and chemical   robustness. However, despite a large number of scientific reports   on the material, the mechanism of the enhanced high-rate Li+   storage capacity that results from the addition of graphene to   TiO2 - typically attributed to improved electrical conductivity -   is still not well understood. In this work, we focus on   optimizing the processing of surfactant-templated graphene-TiO2   hybrid nanocomposites. Towards this end, we examine the influence   of various processing parameters, in particular the   surfactant-mediated colloidal dispersion of graphene, on the   material properties and electrochemical performance of   graphene-TiO2. We investigate the influence of electrode mass   loading on Li+ storage capacity, focusing mainly on high-rate   performance. Furthermore, we demonstrate an approach for   estimating power loss during charge/discharge cycling, which   offers a succinct method for characterizing the high-rate   performance of Li-ion battery electrodes. (C) The Author(s) 2015.   Published by ECS. All rights reserved.

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