The increasing demand for flexible electronic devices
has risen
due to the high interest in electronic textiles (e-textiles). Consequently,
the urge to power e-textiles has sparked enormous interest in flexible
energy storage devices. One-dimensional (1D) configuration supercapacitors
are the most promising technology for textile applications, but often
their production involves complex synthesis techniques and expensive
materials. This work unveils the use of the novel electrospray deposition
(ESD) technique for the deposition of poly(3,4-ethylenedioxythiophene)–poly(styrene
sulfonate) (PEDOT:PSS). This deposition methodology on conductive
carbon yarns creates flexible electrodes with a high surface area.
The deposition conditions of PEDOT:PSS were optimized, and their influence
on the electrochemical performance of a 1D symmetric supercapacitor
with a cellulose-based gel as an electrolyte and a separator was evaluated.
The tests herein reported show that these capacitors exhibited a high
specific capacitance of 72 mF g–1, an excellent
cyclability of more than 85% capacitance retention after 1500 cycles,
and an outstanding capability of bending.