Chestnut-like SnO2/C nanocomposites with enhanced lithium ion storage properties

TitleChestnut-like SnO2/C nanocomposites with enhanced lithium ion storage properties
Publication TypeJournal Article
Year of Publication2016
AuthorsYang, L, Dai, T, Wang, Y, Xie, D, R. Narayan, L, Li, J, Ning, X
JournalNano Energy
Volume30
Pagination885 - 891
Date Published2016/12//
ISBN Number2211-2855
KeywordsAnode, anode material, batteries, capacity, electrochemical properties, electron-microscopy, graphene, Hierarchical hollow structure, hollow nanospheres, in situ TEM, kirkendall, lithium ion battery, nanosheets, scale synthesis, SnO2 sheet
Abstract

Chestnut-like SnO2 and SnO2/C nanocomposites with hierarchical structures are synthesized by hydro thermally oxidizing Sn nanoparticles in glucose solution. Structural characterizations using SEM and TEM reveal that the SnO2 nanoparticles are composed of numerous, randomly arranged SnO2 nanosheets with hollow cores. Owing to the short electron and ion diffusion distances and transformation strain accommodation mechanism of this structure the new SnO2/C nanocomposites exhibit enhanced lithium ion storage properties with a capacity of similar to 930 mAh g(-1) and capacity retention of about 96% after 100 cycles at 0.1 C. An in situ TEM study of the electrochemically driven lithiation/delithiation of SnO2/C nanocomposites reveals that their enhanced cycling stability is mainly facilitated by the limited volume expansion and excellent mechanical robustness of the hollow chestnuts. (C) 2016 Elsevier Ltd. All rights reserved.

Short TitleNano Energy