A hybrid shell material with mixed ion/electron conductivity used for high-performance Li-S batteries

A hybrid shell material of hollow Nb 2 O 5 microspheres has been engineered as an effective sulfur host for use in Li-S batteries. Of particular note is that the selected Nb 2 O 5 not only exhibits ultrafast Li + motion properties due to its unique room-and-pillar NbO 6 /NbO 7 framework structure, but also demonstrates moderate polar affinities to the lithium polysulfides based on theoretical calculations. A hybrid shell material of hollow Nb 2 O 5 microspheres wrapped with rGO (m-Nb 2 O 5 @rGO) has been engineered as an effective sulfur host for Li-S batteries. The selected Nb 2 O 5 not only exhibits ultrafast Li + motion properties due to its unique room-and-pillar NbO 6 /NbO 7 framework structure, but also demonstrates moderate polar affinities to the lithium polysulfides.