Blocking polysulfides with a Janus Fe₃C/N-CNF@RGO electrode via physiochemical confinement and catalytic conversion for high-performance lithium–sulfur batteries

Abstract

A novel Janus Fe3C/N-CNF@RGO electrode was successfully constructed, which realizes the co-existence of chemical immobilization, catalytic ability, and physical barrier in 3D conductive networks, enabling robust cycling stability of Li–S battery

MOF-Derived Bifunctional Co0.85Se Nanoparticles Embedded in N-Doped Carbon Nanosheet Arrays as Efficient Sulfur Hosts for Lithium–Sulfur Batteries

“…It is also worth mentioning that Co 0.85 Se/NC-S can still deliver a discharge specific capacity of 678 mAh g –1 at a high sulfur loading of 4.08 mg cm –2 after 50 cycles at 0.1C (Figure S11). Therefore, the electrochemical performance of the Co 0.85 Se/NC-S is superior to the previously reported nanostructured hosts for sulfur cathodes. − …”

Synergy of MXene with Se Infiltrated Porous N‐Doped Carbon Nanofibers as Janus Electrodes for High‐Performance Sodium/Lithium–Selenium Batteries

“…Renewable energy storage devices with high energy density, excellent cyclic stability, and long cycle life are in great demand for use in portable electronics, electric vehicles, and grid energy storage. [ 1,2 ] Among the various new rechargeable battery technologies, room‐temperature metal–selenium (e.g., Li–Se and Na–Se) batteries have attracted considerable attention owing to their high theoretical specific capacity (678 mA h g −1 ), and superior volumetric capacity (3253 mA h cm −3 ). [ 3,4 ] The relatively good electronic conductivity of Se (1 × 10 −3 S m −1 ) also boosts the reaction kinetics with sodium metal which helps improve the overall stability of the system.…”

Multifunctional integrated VN/V2O5 heterostructure sulfur hosts for advanced lithium–sulfur batteries

“…These critical problems inevitably lead to limited sulfur loading, fast capacity degradation, and low coulombic efficiency of Li–S batteries, and thus it is not sufficient for practical applications. 5–9…”

“…Since most of these polar hosts are poorly conductive and slightly catalytically active, they still need to be combined with high conductivity catalysts to ensure their fast trapping, localization, and conversion capabilities for Li 2 S. Recently, some prospective researchers have been devoted to tackling the above problems by introducing catalysts into host materials. Until now, various hosts with catalysts, including VO 2 –VN, 32 TiO 2 –TiN, 33,34 MoS 2 –GN, 31 WS 2 –WO 3 , 7 TiN–VN, 27 etc . have been developed to accelerate the LiPSs conversion and effectively suppress their shuttling in the Li–S batteries.…”