Abstract
A highly stable sodium ion battery anode was prepared by deposition of hydroperoxostannate on graphene oxide from hydrogen-peroxide-rich solution followed by sulfidization and 300 °C heat treatment. The material was characterized by electron microscopy, powder X-ray diffraction and X-ray photoelectron spectroscopy which showed that the active material is mostly rhombohedral SnS2 whose (001) planes were preferentially oriented in parallel to the graphene oxide sheets. The material exhibited >610 mA h g-1 charge capacity at 50 mA g-1 (with >99.6% charging efficiency) between 0 and 2 V vs. Na/Na+ electrode, high cycling stability for over 150 cycles and very good rate performance, >320 mA h g-1 at 2000 mA g-1.
Original language | American English |
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Pages (from-to) | 8431-8437 |
Number of pages | 7 |
Journal | Journal of Materials Chemistry A |
Volume | 2 |
Issue number | 22 |
DOIs | |
State | Published - 14 Jun 2014 |