Dresden 2017 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 15: Focus Session: Two-dimensional materials II (joined session with TT)

HL 15.9: Talk

Monday, March 20, 2017, 17:45–18:00, POT 81

synthesis of bismuth/reduced graphene oxide composites and their electrochemical properties for Na-ion batteries — •Benrong Hai^1,2, Yang Xu¹, Min Zhou¹, Liying Liang¹, and Yong Lei¹ — ¹TU-ilmenau, Ilmenau, Germany — ²Northeastern University, Shenyang, P. R. China

Recently, Na-ion batteries have been considered as a desirable alternative to Li-ion batteries, because of the greater abundance and lower cost of sodium-containing precursors. Even though Na-ion batteries have attracted great attention, more research is needed to enhance their performance. Reduced graphene oxide sheets have extraordinary electronic transport properties, large surface area and mechanical flexibility. Therefore, reduced graphene oxide sheets have been considered as a matrix material to improve electrochemical performance of metal nanoparticles. Here, we demonstrate a facile strategy to prepare bismuth/reduced graphene oxide composites. Such composites exhibit high specific capacity and enhanced cycling performance as anode. Compared to pure bismuth nanoparticles, the enhancement of sodium storage could be attributed to the introduction of reduced graphene oxide sheets that not only buffer the large volume changes during the reaction of sodium and bismuth, but also provide a highly conductive network for rapid electron transport in electrochemical reaction.