Synergistic effect of oxygen-deficient Ni3V2O8@carbon nanotubes-modified separator for advanced lithium–sulfur batteries

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Rare Metals Pub Date : 2024-12-28 DOI:10.1007/s12598-024-03180-z

Zheng-Dao Pan, Zhou-Lu Wang, Xing-You Rao, Xiang Liu, Yi Zhang

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Abstract

Lithium–sulfur batteries (LSBs) have attracted widespread attention due to their high theoretical energy density. However, the dissolution of long-chain polysulfides into the electrolyte (the “shuttle effect”) leads to rapid capacity decay. Therefore, finding suitable materials to mitigate the shuttle effect of polysulfides is crucial for enhancing the electrochemical performance of lithium–sulfur batteries. In this study, LSBs’ separator is modified with Ni₃V₂O₈ nanoparticles@carboxylated carbon nanotubes (Ni₃V₂O₈@CNTs) composite. There are abundant oxygen vacancies in Ni₃V₂O₈@CNTs composite which plays a synergistic effect on shuttle effect. The Ni₃V₂O₈ can tightly anchor soluble polysulfides through oxygen vacancies, while the CNTs not only facilitate the transport of ions and electrons but also weaken the migration of polysulfides, limiting shuttle effect. As a result, the cycling stability of LSBs using Ni₃V₂O₈@CNTs-modified separator has been significantly improved (with a capacity decay rate of only 0.0334% after 1500 cycles at 4.0C). This study proposes a strategy to design modified separator for high-performance LSBs.

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.