Issue 77, 2015

SiO2@NiO core–shell nanocomposites as high performance anode materials for lithium-ion batteries

Abstract

SiO2@NiO core–shell nanocomposites of ca. 80 nm in diameter with a thin NiO shell were assembled via a facile online deposition of NiO and investigated as an anode for lithium ion batteries. The results indicated that the specific discharge capacity of the obtained SiO2@NiO core–shell nanocomposite electrode still retains 585 mA h g−1 at a discharge current density of 100 mA g−1 after 60 cycles and presents a coulombic efficiency of almost 100%, exhibiting good cycling stability and excellent rate capability after the first few cycles. This might be accounted for by the reversible lithiation/delithiation of the product Si due to the irreversible lithiation of SiO2 while the irreversible lithiation of NiO to produce metal Ni nanoparticles is responsible for the activation of SiO2, which is demonstrated by comparing the cyclic voltammetries (CVs) and electrochemical impedance spectra (EIS) of SiO2, NiO and SiO2@NiO electrodes.

Graphical abstract: SiO2@NiO core–shell nanocomposites as high performance anode materials for lithium-ion batteries

Article information

Article type
Paper
Submitted
12 Jun 2015
Accepted
16 Jul 2015
First published
16 Jul 2015

RSC Adv., 2015,5, 63012-63016

SiO2@NiO core–shell nanocomposites as high performance anode materials for lithium-ion batteries

Y. Wang, W. Zhou, L. Zhang, G. Song and S. Cheng, RSC Adv., 2015, 5, 63012 DOI: 10.1039/C5RA11243E

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