119th General Meeting of the KCS

Type Poster Presentation
Area 전기화학
Room No. 포스터발표장
Time 4월 21일 (금요일) 13:00~14:30
Code ELEC.P-504
Subject Influence of Additives on Organic Solvent-based Electrolyte for Electrochemical Double-Layer Capacitors
Authors NGUYEN DINH HIEU, 이경구*
군산대학교 화학과, Korea
Abstract Electrochemical Double-Layer Capacitors (EDLCs), also called capacitors, it has a wide range of application such as electrical energy storage systems, hybrid electric vehicles (HEVs), portable devices and for storage of energy generated by solar cell. Commercial EDLCs have activated carbon (AC) as the generally used electrode material because of its great adsorptivity and high surface area compared to the other materials. EDLCs has higher power density but lower energy density than those of rechargeable batteries. Because the operative voltage of capacitors is related to the specific energy of EDLCs: (E=1/2 C∙V^2), it is important to increase the voltage of the capacitors for improved energy storage. But, there is one issue, at high voltages, the component of electrolyte (organic solvents) tend to decompose, leaving a highly resistive surface film on the electrodes. In this paper, we will focus on research about the influence of Additives on Organic Solvent-based Electrolyte to electrodes, that is the formation of Solid Electrolyte Interphase (SEI) on the surface of electrodes to mitigate the electrolyte decomposition and reactions of electrolyte to the surface of electrode as well as suppress the increase of the charge transfer resistance. Therefore, it will improve the electrochemical performance of EDLCs during cycling. Spiro-1,1’-bipyrolidinum tetrafluoroborate (SBP-BF4), a spiro-type quaternary ammonium salt, has a low viscosity and a high solubility in various solvents. Furthurmore, it shows excellent electrochemical stability and a high conductivity. In the present study, it was expected that additives would increase the ionic conductivity and the mobility in the electrolyte that would allow faster charge/discharge and better performance for EDLCs.
E-mail nguyendinhhieu2992@gmail.com