121st General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code ELEC.P-582
Subject Fabrication of PEDOT:PSS-treated vanadium oxide nanospheres for supercapacitor electrodes with wide operating voltage range
Authors Dajung Hong, Geunpyo Choi, Sanggyu Yim1,*
Department of Bionano Chemistry, Kookmin University, Korea
1Department of Applied Chemistry, Kookmin University, Korea
Abstract Vanadium oxide (VOx) has received growing attention as next-generation electrode material for supercapacitors due to its high faradic activity with wide operating voltage range based on various stable oxidation states of vanadium, from V5+ to V2+. However, the poor electrical conductivity of vanadium oxides, ranging from 10-3 Ω-1 cm-1 of V2O3 to ~104 Ω-1 cm-1 of V2O5 still hamper their practical application to supercapacitor electrodes. Although the use of nanoparticels can be a simple solution because they provide a large surface area and short diffusion path for ions, the nanoparticles should be mixed with polymeric binders before deposition in order for tight binding with current collectors. However, the addition of binders significantly lowers the merits of using nanoparticles and decreases capacitive properties of the electrodes. In thin work, we fabricated various supercapacitor electrodes based on the VOx nanosphere treated with poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). The treatment of the PEDOT:PSS on the VOx nanospheres not only adhere the nanospheres to current collectors firmly without using any binders but also enhance the electrical conductivity of the VOx electrodes.
E-mail nadangmu@naver.com