Preparation and enhanced lithium-ion storage performance of 3D network-like SnS2 anode

Abstract

In present work, the three-dimensional (3D) sphere-like SnS2 and network-like SnS2 (the obtained samples respectively denoted as SnS2-SP and SnS2-NW) are successfully fabricated using a facile one-step process performed at low reaction temperature for a reduced time. It is found that the structure of the SnS2-NW prepared in a water-bath environment for 75 min is composed of self-assembled nanoflakes, the thickness of the cross-linked flakes is in a range of 5–10 nm. The layer spacing along the c-axis and specific surface area of SnS2-NW sample are larger than that of the SnS2-SP. When SnS2-SP and SnS2-NW materials are applied as anode electrodes of lithium-ion batteries (LIBs), the network-like SnS2 electrode exhibited high reversible capacity of 401.31 mA h g−1 after 100 cycles at 100 mA g−1, with a capacity loss of 0.5% per cycle. The SnS2-NW electrode can still retain a discharge capacity of 358.71 mA h g−1 with almost 99.7% coulombic efficiency even at 800 mA g−1, demonstrating excellent rate capacity and cycling performance, which are superior to that of the SnS2-SP electrode. The results demonstrate significant potential of SnS2-NW for application as anode of the LIBs.