Jump to main content
Jump to site search

Issue 42, 2016
Previous Article Next Article

Superior high-voltage aqueous carbon/carbon supercapacitors operating with in situ electrodeposited polyvinyl alcohol borate gel polymer electrolytes

Author affiliations

Abstract

Electrodeposited polyvinyl alcohol borate (PVAB) aqueous gel polymer electrolytes (GPEs) have been found to possess excellent high-voltage stability and high ionic conductivity which are promising in building aqueous supercapacitors with high operating voltage and good electrochemical performance. In this study, PVAB GPEs were formed directly on activated carbon electrodes by in situ electrodeposition to serve as both electrolytes and separators for high-voltage aqueous carbon/carbon supercapacitors. The morphology and structure of the prepared PVAB GPE layers were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray diffraction. The electrochemical performance of supercapacitors using PVAB GPEs was tested and compared with those of supercapacitors using neutral salt aqueous electrolytes and organic electrolytes. The results show that the PVA molecules in PVAB GPEs are in the amorphous state and crosslinked by O → B coordination bonds. The supercapacitors using PVAB GPEs can operate stably at 2 V, and no drastic electrolysis is observed in these supercapacitors even at 4 V. Among all the PVABs, PVA potassium borate (PVAPB) GPEs possess the best ionic conductivity. The high energy densities of 12.47 and 7.14 W h kg−1 can be achieved for the supercapacitor using the PVAPB GPE at the current densities of 0.2 and 2 A g−1, respectively, which are better than those of supercapacitors using 1 M Li2SO4 aqueous electrolyte and 1 M LiPF6 organic electrolyte especially at high current densities. The reversible ionization of water molecules cooperating with the reversible formation of O → B coordination bonds is considered to play a critical role in the ionic transportation of PVAB GPEs.

Graphical abstract: Superior high-voltage aqueous carbon/carbon supercapacitors operating with in situ electrodeposited polyvinyl alcohol borate gel polymer electrolytes

Back to tab navigation

Supplementary files

Article information


Submitted
17 Aug 2016
Accepted
27 Sep 2016
First published
27 Sep 2016

J. Mater. Chem. A, 2016,4, 16588-16596
Article type
Paper

Superior high-voltage aqueous carbon/carbon supercapacitors operating with in situ electrodeposited polyvinyl alcohol borate gel polymer electrolytes

M. Jiang, J. Zhu, C. Chen, Y. Lu, E. S. Pampal, L. Luo, P. Zhu and X. Zhang, J. Mater. Chem. A, 2016, 4, 16588 DOI: 10.1039/C6TA07063A

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

Search articles by author

Spotlight

Advertisements