Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 82: Nanostructures at Surfaces: Graphene and Other Aspects

O 82.4: Vortrag

Mittwoch, 22. März 2017, 16:45–17:00, REC/PHY C213

Amorphous TiO2 Inverse Opal Anode for High-rate Sodium Ion Batteries — •Min Zhou, Yang Xu, Liying Liang, Huaping Zhao, Benrong Hai, and Yong Lei — Ilmenau University of Technology, Ilmenau 98693, Germany

With the increased demands of available energy, potential applications of sodium-ion batteries have motivated significant progress in energy storage field. Compared with Li ions, large radius of Na ions results in different electrochemical behaves. Hence, synergistic understanding of the differences is greatly significant. Surface availability of ions is critical to rate performance in SIBs. Here, amorphous TiO2 inverse opal is employed as a proof-of-concept example to illuminate the influences of surface ion availability and the relationship between solvent wettability and rate capability. Enhanced solvent wettability contributes to superior rate capabilities, regardless of the type of electrolyte and the ion concentration in electrolyte. Our concept offers a potential to realize full potential of designing electrode materials for SIBs by adjustable surface kinetics. Similar attentions may be used to mitigate problems caused by ion affinity or other limitations from tremendous Na ions, and enable sodium-ion batteries to be more amenable for large-scale implementations.