Dual-role electrolyte additive for simultaneous polysulfide shuttle inhibition and redox mediation in sulfur batteries

In Li-S batteries, the insulating nature of sulfur and Li2S causes enormous challenges, such as high polarization and low active material utilization. Nucleation of the solid discharge product, Li2S, during...

A free-standing PAN/PMMA/rGO carbon paper as an effective interlayer for high performance lithium-sulfur batteries

The limitations of the polysulfides shuttling and lithium dendrites have been obstacles to improve the lithium-sulfur battery technology, resulting in low active material utilization and poor cycle life. Here we report a simple modification of the traditional lithium-sulfur battery configuration to achieve high capacity with a long cycle life and high reversible rate. Great improvement was observed with a carbonized PAN/PMMA/rGO paper between the anode and the separator in the active material utilization and capacity retention. The adding of a free-standing PAN/PMMA/rGO carbon interlayer demonstrated the feasibility of enhancing the performance of lithium-sulfur batteries.

A 3D conductive network with high loading Li2S@C for high performance lithium–sulfur batteries

We have prepared an integrated CF–CB–Li2S@C cathode with high loading Li2S for high areal-capacity Li–S batteries. The federated conductive network and efficient carbon coating not only provide an efficient electron transport and guarantee high active material utilization but also form a durable protective shield for suppressing polysulfide dissolution.

Stabilization of polysulfides via lithium bonds for Li–S batteries

A strategy of in situ g-C3N4 coating was proposed to trap polysulfides in Li–S batteries, which enables a significant improvement in both active material utilization and capacity retention.