The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.201902363. Lithium-sulfur batteries (LSBs) have shown great potential for application in high-density energy storage systems. However, the performance of LSBs is hindered by the shuttle effect and sluggish reaction kinetics of lithium polysulfides (LiPSs). Herein, heterostructual Nb 2 O 5 nanocrystals/ reduced graphene oxide (Nb 2 O 5 /RGO) composites are introduced into LSBs through separator modification for boosting the electrochemical performance. The Nb 2 O 5 /RGO heterostructures are designed as chemical trappers and conversion accelerators of LiPSs. Originating from the strong chemical interactions between Nb 2 O 5 and LiPSs as well as the superior catalytic nature of Nb 2 O 5 , the Nb 2 O 5 /RGO nanocomposite possesses high trapping efficiency and efficient electrocatalytic activity to long-chain LiPSs. The effective regulation of LiPSs conversion enables the LSBs enhanced redox kinetics and suppressed shuttle effect. Moreover, the Nb 2 O 5 /RGO nanocomposite has abundant sulfophilic sites and defective interfaces, which are beneficial for the nucleation and growth of Li 2 S, as evidenced by analysis of the cycled separators. As a result, LSBs with the Nb 2 O 5 /RGOmodified separators exhibit excellent rate capability (816 mAh g −1 at 3 A g −1 ) and cyclic performance (628 mAh g −1 after 500 cycles). Remarkably, high specific capacity and stable cycling performance are demonstrated even at an elevated temperature of 50 °C or with higher sulfur loadings. Lithium-Sulfur Batteries www.advancedsciencenews.com

No abstract

No abstract

No abstract

P-NiMoP nanorods (NRs) comprising tri-phases of MoP2, Ni3P and MoO2 with rich crystalline interfaces and oxygen vacancies in MoO2 have been synthesized by plasma-assisted phosphorization of NiMoO4 NRs.