Skip to main content
Log in

Cellulose and poly(vinyl alcohol) composite gels as separators for quasi-solid-state electric double layer capacitors

  • Original Paper
  • Published:
Cellulose Aims and scope Submit manuscript

Abstract

Cellulose/poly(vinyl alcohol) (PVA) composite gels are prepared as separators for quasi-solid-state electrical double-layer capacitors (EDLCs) by a simple freeze-thawing method. Fourier-transform infrared spectroscopy, scanning electron microscopy and mechanical testing machine are used to characterize the structure and morphology. Compared with the PVA gel, the as-prepared composite gels show improved network structure and enhanced mechanical properties. The cyclic voltammetric curves, galvanostatic charge/discharge curves, electrochemical impedance spectroscopy and cycling performance of EDLCs with these composite gels are also evaluated. It is found that the EDLC with the optimum composite gel can work in a voltage window of 0–1.8 V and display a specific capacitance of 125.1 F g−1 (based on active carbon on one electrode) at a current density of 1 A g−1. Furthermore, it also has an excellent cycling stability with capacitance retention of ~ 88% after 1500 cycles. These results suggest that the composite gels can serve as a class of promising separators for EDLCs.

Graphical abstract

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Scheme 1
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5

Similar content being viewed by others

References

Download references

Acknowledgments

This work was supported by the National Natural Science Foundation of China (NSFC) (51503161) and Hubei Provincial Natural Science Foundation of China (2018CFB267).

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Hongwei Zhang.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Ji, Y., Liang, N., Xu, J. et al. Cellulose and poly(vinyl alcohol) composite gels as separators for quasi-solid-state electric double layer capacitors. Cellulose 26, 1055–1065 (2019). https://doi.org/10.1007/s10570-018-2123-6

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10570-018-2123-6

Keywords

Navigation