Three-Dimensionally Ordered Macro/Mesoporous Nb₂O₅/Nb₄N₅ Heterostructure as Sulfur Host for High-Performance Lithium/Sulfur Batteries.

ABSTRACT: The severe shuttle effect of soluble polysulfides hinders the development of lithium-sulfur batteries. Herein, we develop a three-dimensionally ordered macro/mesoporous (3DOM) Nb₂O₅/Nb₄N₅ heterostructure, which combines the strong adsorption of Nb₂O₅ and remarkable catalysis effect of Nb₄N₅ by the promotion "adsorption-transformation" mechanism in sulfur reaction. Furthermore, the high electrocatalytic activity of Nb₄N₅ facilitates ion/mass transfer during the charge/discharge process. As a result, cells with the S-Nb₂O₅/Nb₄N₅ electrode delivered outstanding cycling stability and higher discharge capacity than its counterparts. Our work demonstrates a new routine for the multifunctional sulfur host design, which offers great potential for commercial high-performance lithium-sulfur batteries.

SUBMITTER: Chen H 

PROVIDER: S-EPMC8229476 | biostudies-literature |

REPOSITORIES: biostudies-literature