Organic Electrochromic-Energy Storage Application Based on Dithienothiophene, Triphenyamine and 3,4-ethylenedioxythiophene


Sezer E., Topal S., Ustamehmetoğlu B., Öztürk T.

5th International Symposium on Materials for Energy Storage and Conversion, 14 - 17 September 2021, pp.64

  • Publication Type: Conference Paper / Summary Text
  • Page Numbers: pp.64
  • Istanbul Technical University Affiliated: Yes

Abstract

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.