Issue 30, 2015

Ex situ electrochemical sodiation/desodiation observation of Co3O4 anchored carbon nanotubes: a high performance sodium-ion battery anode produced by pulsed plasma in a liquid

Abstract

Liquid plasma, produced by nanosecond pulses, provides an efficient and simple way to fabricate a nanocomposite architecture of Co3O4/CNTs from carbon nanotubes (CNTs) and clusters of Co3O4 nanoparticles in deionized water. The crucial feature of the composite's structure is that Co3O4 nanoparticle clusters are uniformly dispersed and anchored to CNT networks in which Co3O4 guarantees high electrochemical reactivity towards sodium, and CNTs provide conductivity and stabilize the anode structure. We demonstrated that the Co3O4/CNT nanocomposite is capable of delivering a stable and high capacity of 403 mA h g−1 at 50 mA g−1 after 100 cycles where the sodium uptake/extract is confirmed in the way of reversible conversion reaction by adopting ex situ techniques. The rate capability of the composite is significantly improved and its reversible capacity is measured to be 212 mA h g−1 at 1.6 A g−1 and 190 mA h g−1 at 3.2 A g−1, respectively. Due to the simple synthesis technique with high electrochemical performance, Co3O4/CNT nanocomposites have great potential as anode materials for sodium-ion batteries.

Graphical abstract: Ex situ electrochemical sodiation/desodiation observation of Co3O4 anchored carbon nanotubes: a high performance sodium-ion battery anode produced by pulsed plasma in a liquid

Article information

Article type
Paper
Submitted
21 May 2015
Accepted
27 Jun 2015
First published
02 Jul 2015

Nanoscale, 2015,7, 13088-13095

Author version available

Ex situ electrochemical sodiation/desodiation observation of Co3O4 anchored carbon nanotubes: a high performance sodium-ion battery anode produced by pulsed plasma in a liquid

M. M. Rahman, I. Sultana, Z. Chen, M. Srikanth, L. H. Li, X. J. Dai and Y. Chen, Nanoscale, 2015, 7, 13088 DOI: 10.1039/C5NR03335G

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