کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6464987 | 1422946 | 2018 | 7 صفحه PDF | دانلود رایگان |
- MoS2-RGO sponges are prepared via freeze drying and thermal treatment process.
- MoS2-RGO sponges are used as free-standing electrodes for sodium-ion batteries.
- MoS2-RGO sponges exhibit a porous conductive sandwich structure.
- A specific capacity of 372.0 mAh gâ1 at 100 mA gâ1 is maintained after 50 cycles.
Currently, the search for high capacity, low cost and free-standing electrodes for sodium-ion batteries (SIBs) is one of the major challenges in energy storage field. In this work, we rationally design MoS2-reduced graphene oxide (MS-RGO) sponges via a simple freeze-drying of ammonium tetrathiomolybdate-graphene oxide mixed solution and a subsequent thermal treatment in N2/H2 atmosphere, and employ these sponges as free-standing anodes for SIBs. The MS-RGO sponges exhibit a porous conducive structure that can facilitate the charge transport and thus show an excellent electrochemical performance. The free-standing sponge electrodes display a maximal reversible specific capacity of 372.0 mAh gâ1 (0.49 mAh cmâ2) at a current density of 100 mA gâ1 after 50 cycles. Even at a high current density of 1 A gâ1, a capacity of 192.2 mAh gâ1 (0.25 mAh cmâ2) is maintained after 345 cycles. The results show that MS-RGO sponges are promising free-standing electrode materials for rechargeable SIBs.
Journal: Chemical Engineering Journal - Volume 332, 15 January 2018, Pages 260-266