Micropatterned materials design with metal oxide based tubular nanocomposites fabricated by biotemplating of cellulose nanocrystalline architectures

• Applicants: Professor Dr. Robin Klupp Taylor; Professor Dr. Cordt Zollfrank
• Subject Area: Synthesis and Properties of Functional Materials
• Term: from 2011 to 2015
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 194783421

• Final Report Year: 2017

Final Report Abstract

A new type of Co3O4 hybrid particles was successfully synthesized via a facile wet-chemical route and their electrochemical performance and structure stability as anode material for lithium-ion batteries were studied. Cyclic voltammetry measurements showed an enhanced cycle stability for electrodes prepared with Na-alginate binder. Electrochemical impedance spectroscopy measurements confirmed the improved electrode performance. It could be shown that a changed electrode structure results in a decreased charge-transfer resistance, which is an indicator for a facile charge transfer at the active material/electrolyte interface. The improved electrochemical performance can be attributed to the new binder system, that leads to a homogeneous distribution of the active material and thus to more stability and an increased charge transfer. This new strategy is low-cost, effective and environment friendly and could be transferred to other anode materials for lithium-ion batteries.

Publications

• (2012) Biotemplating of inorganic functional materials from polysaccharides. Bioinspired, Biomimetic and Nanobiomaterials, 1, 13-25
  Zollfrank C, Cromme P, Rauch MW, Scheel H, Kostova MH, Gutbrod K, Gruber S, Van Opdenbosch D
  
• (2012) Noble metal nanoparticles on biotemplated nanowires. Bioinspired, Biomimetic and Nanobiomaterials, 1, 95-100
  Gruber S, Zollfrank C