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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 | 2021 Jun

REPOSITORIES: biostudies-literature

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

Chen Haoxian H Wang Jiayi J Zhao Yan Y Zeng Qindan Q Zhou Guofu G Jin Mingliang M

Nanomaterials (Basel, Switzerland) 20210610 6

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 activi ...[more]

PMID: 34200549

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