Rational design and synthesis of hierarchically structured SnO2 microspheres assembled from hollow porous nanoplates as superior anode materials for lithium-ion batteries
- 467 Downloads
Herein, hierarchically structured SnO2 microspheres are designed and synthesized as an efficient anode material for lithium-ion batteries using hollow SnO2 nanoplates. Three-dimensionally ordered macroporous (3-DOM) SnOx-C microspheres synthesized by spray pyrolysis are transformed into hierarchically structured SnO2 microspheres by a two-step post-treatment process. Sulfidation produces hierarchically structured SnS-SnS2-C microspheres comprising tin sulfide nanoplate and carbon building blocks. A subsequent oxidation process produces SnO2 microspheres from hollow SnO2 nanoplate building blocks, which are formed by Kirkendall diffusion. The discharge capacity of the hierarchically structured SnO2 microspheres at a current density of 5 A·g−1 for the 600th cycle is 404 mA·h·g−1. The hierarchically structured SnO2 microspheres have reversible discharge capacities of 609 and 158 mA·h·g−1 at current densities of 0.5 and 30 A·g−1, respectively. The ultrafine nanosheets contain empty voids that allow excellent lithium-ion storage performance, even at high current densities.
KeywordsKirkendall diffusion nanoplate tin oxide lithium-ion battery spray pyrolysis
Unable to display preview. Download preview PDF.
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2017R1A2B2008592).
- Sun, M.-H.; Huang, S.-Z.; Chen, L.-H.; Li, Y.; Yang, X.-Y.; Yuan, Z.-Y.; Su, B.-L. Applications of hierarchically structured porous materials from energy storage and conversion, catalysis, photocatalysis, adsorption, separation, and sensing to biomedicine. Chem. Soc. Rev. 2016, 45, 3479–3563.CrossRefGoogle Scholar
- Wang, X. L.; Liu, Y. G.; Arandiyan, H.; Yang, H. P.; Bai, L.; Mujtaba, J.; Wang, Q. G.; Liu, S. H.; Sun, H. Y. Uniform Fe3O4 microflowers hierarchical structures assembled with porous nanoplates as superior anode materials for lithium-ion batteries. Appl. Surf. Sci. 2016, 389, 240–246.CrossRefGoogle Scholar
- Lv, D. P.; Gordin, M. L.; Yi, R.; Xu, T.; Song, J. X.; Jiang, Y.-B.; Choi, D.; Wang, D. H. GeOx/reduced graphene oxide composite as an anode for Li-ion batteries: Enhanced capacity via reversible utilization of Li2O along with improved rate performance. Adv. Funct. Mater. 2014, 24, 1059–1066.CrossRefGoogle Scholar