Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 20, 2020
Previous Article Next Article

Multifunctional NiCo2O4 nanosheet-assembled hollow nanoflowers as a highly efficient sulfur host for lithium–sulfur batteries

Author affiliations

Abstract

Herein, a simple approach was developed to fabricate novel NiCo2O4 hollow nanoflowers (NCOHFs), which were explored as a sulfur carrier material for lithium–sulfur (Li–S) batteries. Remarkably, the capacity of the NCOHF/S composite electrode was ∼666.8 mA h g−1 in the fourth cycle, which was maintained at ∼432.9 mA h g−1 in the 400th cycle under a current density of 1.0C, with a low decay rate of 0.087% per cycle. The overall outstanding properties of the NCOHF/S composite are attributed to the successful new strategy in structural design via in situ and ex situ procedures. Firstly, NCOHF with bifunctional catalytic activity and chemical adsorption can efficiently promote the redox reactions of lithium polysulfides (LiPSs) and suppress the diffusion of polysulfides. Secondly, NCOHF with inherently high electronic conductivity acts as a conduit to accelerate the transport of electrons and ions. Thirdly, the flower-like NiCo2O4 nanosheets are anchored tightly to the conductive carbon and binder during the Li+ insertion and extraction processes, which can effectively suppress the aggregation of the NCOHF/S composite during cycling. Finally, the hollow space inside the NCOHF/S composite provides sufficient free space for the expansion of encapsulated pure sulfur.

Graphical abstract: Multifunctional NiCo2O4 nanosheet-assembled hollow nanoflowers as a highly efficient sulfur host for lithium–sulfur batteries

Back to tab navigation

Supplementary files

Article information


Submitted
31 Dec 2019
Accepted
14 Apr 2020
First published
22 Apr 2020

Dalton Trans., 2020,49, 6876-6883
Article type
Paper

Multifunctional NiCo2O4 nanosheet-assembled hollow nanoflowers as a highly efficient sulfur host for lithium–sulfur batteries

Z. Cui, S. He, Q. Liu and R. Zou, Dalton Trans., 2020, 49, 6876
DOI: 10.1039/C9DT04936C

Social activity

Search articles by author

Spotlight

Advertisements