5th International Symposium on Materials for Energy Storage and Conversion, 14 - 17 Eylül 2021, ss.64
With the development of technology, electrochemical energy
storage systems have attracted to create low weight, low cost,
flexible and environmentally sustainable energy storage
devices [1-3]. Many studies focus on a still challenge to
improve energy for supercapacitor or improve power for
batteries by using hybrid energy storage mechanism [4]. The
skeleton idea of the hybrid devices is to combine
supercapacitor-type electrode materials with the battery type
electrode materials [5]. For this purpose, designing the new
hybrid electrode materials have gained importance.
Organic electrode materials have received attention due to the
relative abundance of their constituent, facile synthetic
processes, and their flexible features [6,7]. With the
improving the micro/nano materials, conjugated microporous
polymers (CMP) have attracted to enhance the
electrochemical energy storage system because of their high
specific surface area to do suitable for pseudocapacitors and
batteries [8]. CMPs material exhibit high capacitance and
long cycle life due to π-conjugation and porosity [9].
However, these CMP compounds could be used only powder
form and obtaining film state CMP is very rarely due to their
low solubility with rigid and cross-linked structure. This
problem could be solved with the directly CMP film forming
on electrode surface by electrochemical deposition in one
step [10]. This way provides to control film thickness by
monitoring the polymerization condition and create flexible
multifunctional applications [11].
Additionally, organic electrode material could be used in
electrochromic devices due to their coloration under different
potential [12]. Nowadays, multifunctional applications have
great attention and electrochromic-energy storage system is
most popular area for future technologies.
In this study, we demonstrate that new organic electrode
materials obtained electrochemical deposition with
triphenylamine and dithienothiophene based monomer (D)
and ethylenedioxythiophene (E) on ITO. The polymer films
were prepared with different molar ratio of monomers (D/E) :
10/1; 5/1; 5/2; 1/1 and 1/2). The new copolymers indicate
color changing between charge and discharge states (Figure
1). The concept of electrochromic and polymer films offers
promising opportunities for the future multifunctional
technologies and next generation energy storge applications.