Issue 21, 2020

Hollow nanoparticle-assembled hierarchical NiCo2O4 nanofibers with enhanced electrochemical performance for lithium-ion batteries

Abstract

Significant capacity degradation and a dramatic volume change call for effective strategies to address the intrinsic issues of transition metal oxide anodes of lithium-ion batteries. Rational nanostructural design has shown great promise in improving structural stability and electrochemical performance. We here report the fabrication of hollow nanoparticle-assembled hierarchical NiCo2O4 nanofibers via a facile electrospining technique and annealing process. A set of control experiments and systematic characterization demonstrate that the presence of polymers and an appropriate annealing procedure are key to form a novel nanostructured anode. The hollow nanostructure and abundant mesopores centered at about 20 nm in the nanofibers could effectively suppress severe volume variations in the lithiation/delithiation process. Furthermore, the novel nanoparticle-nanofiber hierarchical architecture could shorten the lithium diffusion length, increase the contact areas between the electrode and electrolyte, and accordingly promote fast electron/charge transfer. As expected, the optimized hierarchical NiCo2O4 nanofibers exhibit excellent performance for Li-ion batteries, delivering a capacity of 926.2 mA h g−1 at 0.1 A g−1 and 687 mA h g−1 at a high current density of 2 A g−1. This work may provide an attractive and promising strategy for advancing transition metal oxide anodes.

Graphical abstract: Hollow nanoparticle-assembled hierarchical NiCo2O4 nanofibers with enhanced electrochemical performance for lithium-ion batteries

Supplementary files

Article information

Article type
Research Article
Submitted
24 Jul 2020
Accepted
01 Sep 2020
First published
02 Sep 2020

Inorg. Chem. Front., 2020,7, 4101-4112

Hollow nanoparticle-assembled hierarchical NiCo2O4 nanofibers with enhanced electrochemical performance for lithium-ion batteries

C. Han, W. Cao and M. Cao, Inorg. Chem. Front., 2020, 7, 4101 DOI: 10.1039/D0QI00892C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements