A solvothermal induced self-assembling of SnO2/exfoliated graphite composite with enhanced lithium storage performances
- 30 Downloads
A new solvothermal induced self-assembling method was investigated for the facile synthesis of SnO2/exfoliated graphite (EG) composite without any structure-directing agents. With the assistance of solvothermal treatment in an acetone-H2O mixture, ultra-small SnO2 nanoparticles of less than 10 nm could be transformed from a metastable state in colloidal solution to a highly-dispersed state on the inert surface of EG which was not acid-treated beforehand. The preparation conditions such as solvothermal time and SnO2 adding amount were found to be important factors influencing the structure and electrochemical performance of the composites. The half-sell using the SnO2/EG composite as an electrode exhibited a greatly enhanced lithium storage capacity of 910 mAh g−1 at the current density of 100 mA g−1 after 200 cycles and a moderate rate capability of 385 mAh g−1 at 1000 mA g−1. Compared with previous studies, this solvothermal induced self-assembling process supplies not only a promising anode material for newly advanced Li-ion batteries, but also a green and scalable approach for the preparation of metal oxide/carbon composites.
This work was financially supported by National Scientific Research Funding of China [No. 51702191, No. 21603127], Natural Science Foundation of Shanxi Province [No. 201701D221062, No. 201801D221099], Scientific and Technological Innovation Programs of High Education Institutions in Shanxi [No. 2017110]. The authors thank the Scientific Instrument Center of Shanxi University for the Kindly Help in material characterizations.
- 11.J. Liang, C. Yuan, H. Li, K. Fan, Z. Wei, H. Sun, J. Ma, Growth of SnO2 nanoflowers on N-doped carbon nanofibers as anode for Li- and Na-ion batteries. Nanomicro Lett. 10, 21 (2017)Google Scholar
- 13.H. Liu, Carbon nanotubes anchored with SnO2 nanosheets as anode for enhanced Li-ion storage. J. Mater. Sci.: Mater. Electron. 25, 3353 (2014)Google Scholar
- 28.H. Kim, G.O. Park, Y. Kim, S. Muhammad, J. Yoo, M. Balasubramanian, Y.-H. Cho, M.-G. Kim, B. Lee, K. Kang, H. Kim, J.M. Kim, W.-S. Yoon, New insight into the reaction mechanism for exceptional capacity of ordered mesoporous SnO2 electrodes via synchrotron-based X-ray analysis. Chem. Mater. 26, 6361 (2014)CrossRefGoogle Scholar
- 37.N. Naresh, D. Narsimulu, P. Jena, E.S. Srinadhu, N. Satyanarayana, Microwave-assisted hydrothermal synthesis of SnO2/reduced graphene-oxide nanocomposite as anode material for high performance lithium-ion batteries. J. Mater. Sci.: Mater. Electron. 29, 14723 (2018)Google Scholar