Abstract
Lithium–sulfur (Li–S) batteries exhibit a huge potential in energy storage devices for the thrilling theoretical energy density (2600 Wh kg−1). Nevertheless, the serious shuttle effect rooted in polysulfides and retardative hysteresis reaction kinetics results in inferior cycling and rate performances of Li–S batteries, impeding commercial applications. In order to further promote the energy storage abilities of Li–S batteries, a unique binder-free sulfur carrier consisting of SnS2-modified multi-hole carbon nanofibers (SnS2-MHCNFs) has been constructed, where MHCNFs can offer abundant space to accommodate high-level sulfur and SnS2 can promote the adsorption and catalyst capability of polysulfides, synergistically promoting the lithium-ion storage performances of Li–S batteries. After sulfur loading (SnS2-MHCNFs@S), the material was directly applied as a cathode electrode of the Li–S battery. The SnS2-MHCNFs@S electrode maintained a good discharge capacity of 921 mAh g−1 after 150 cycles when the current density was 0.1 C (1 C = 1675 mA g−1), outdistancing the MHCNFs@S (629 mAh g−1) and CNFs@S (249 mAh g−1) electrodes. Meanwhile, the SnS2-MHCNFs@S electrode still exhibited a discharge capacity of 444 mAh g−1 at 2 C. The good performance of SnS2-MHCNFs@S electrode indicates that combining multihole structure designation and polar material modification are highly effective methods to boost the performances of Li–S batteries.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.