Issue 90, 2015

Electrochemical performances of cobalt oxide–carbon nanotubes electrodes via different methods as negative material for alkaline rechargeable batteries

Abstract

Co3O4/CNTs samples are synthesized via different methods and investigated as negative materials for alkaline rechargeable batteries for the first time. The reasons for performance difference of those Co3O4/CNTs electrodes and the impact of CNTs additive amount on cycling properties are explored in detail. CNTs can remarkably enhance the electrochemical activity of Co3O4 materials, leading to a notable improvement of discharge capacity, cycle stability and rate capability. Co3O4/CNTs-C composites via the one-pot reflux method exhibit the desirable electrochemical capability. Co3O4/CNTs-C8 sample (mass ratio of CNTs is 8%) shows the highest discharge capacity of 526.1 mA h g−1. Meanwhile, Co3O4/CNTs-C11 electrode (mass ratio of CNTs is 11%) displays the most outstanding cycle performance with a capacity retention rate of over 97.3% after 200 cycles. A properly electrochemical reaction mechanism of Co3O4/CNTs electrode is also constructed in detail.

Graphical abstract: Electrochemical performances of cobalt oxide–carbon nanotubes electrodes via different methods as negative material for alkaline rechargeable batteries

Supplementary files

Article information

Article type
Paper
Submitted
01 Jul 2015
Accepted
19 Aug 2015
First published
24 Aug 2015

RSC Adv., 2015,5, 73410-73415

Author version available

Electrochemical performances of cobalt oxide–carbon nanotubes electrodes via different methods as negative material for alkaline rechargeable batteries

Y. Xu, Y. Dong, X. Wang, Y. Wang, L. Jiao, H. Yuan and J. Li, RSC Adv., 2015, 5, 73410 DOI: 10.1039/C5RA12721A

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