Jump to main content
Jump to site search

Issue 47, 2017
Previous Article Next Article

Elastic soft hydrogel supercapacitor for energy storage

Author affiliations


High-performance supercapacitors, as highly promising candidates for bridging the gap between conventional lithium-ion batteries and traditional electrostatic capacitors, are the key to progress in the field of energy storage. To improve the performance of supercapacitors, the exploration of novel functional electrode materials is always at the forefront of technology. Herein, the rational design of a novel deformable soft supercapacitor, which is based on a compressible capacitive polyvinyl alcohol/polypyrrole (PVA/PPy) composite hydrogel and a flexible carbon nanotubes (CNTs) film, is reported. Due to the unique layered wrinkle structure of the PVA/PPy composite hydrogel, whose internal structure contains a large amount of water, the fabricated supercapacitor exhibits fascinating mechanical properties, including elasticity, compressibility and softness. In addition, the CNTs self-supported film without any binder shows an excellent flexibility as well as a stable capacitance in long-term cycles, which results in an enhanced cycle performance of the (PVA/PPy)(−)//CNTs(+) supercapacitor. Furthermore, the (PVA/PPy)(−)//CNTs(+) supercapacitor exhibits a high working voltage (0–2 V) accompanied with an energy density of 33.3 W h kg−1 (a power density of 1600 W kg−1). The high-performance compressible soft supercapacitor with deformability heralds a new territory of hydrogel-based supercapacitor for energy storage applications.

Graphical abstract: Elastic soft hydrogel supercapacitor for energy storage

Back to tab navigation

Supplementary files

Publication details

The article was received on 15 Sep 2017, accepted on 08 Nov 2017 and first published on 08 Nov 2017

Article type: Paper
DOI: 10.1039/C7TA08152A
Citation: J. Mater. Chem. A, 2017,5, 24942-24950
  •   Request permissions

    Elastic soft hydrogel supercapacitor for energy storage

    B. Yin, S. Zhang, Q. Ren, C. Liu, K. Ke and Z. Wang, J. Mater. Chem. A, 2017, 5, 24942
    DOI: 10.1039/C7TA08152A

Search articles by author