[15a-D505-1~7] 1.4 Energy conversion, storage, resources and environment

▲ [15a-D505-3] Surface Capacitive and Ion-Diffusion-Limited Capacitive Effects in High Energy Density Quantum Dot Nanopores Supercapacitors

Muhammad Alief Irham^1,2, Ricky Dwi Septianto¹, Retno Dwi Wulandari^1,3, Yutaka Majima³, Ferry Iskandar², Yoshihiro Iwasa^1,4, 〇Satria Zulkarnaen Bisri^1,5 (1.RIKEN, 2.Inst. Tech. Bandung, 3.Tokyo Inst. Tech., 4.Univ. Tokyo, 5.Tokyo Univ. Agri.&Tech.)

Keywords:supercapacitor, quantum dots, controlled assemblies

Since the capacity of an electric double-layer supercapacitor (EDL-SC) is strongly determined by the interaction between the electrode surface and the electrolyte, significantly enhancing the surface area of the electrodes is vital. Recently, assembling small-diameter colloidal semiconductor quantum dots into hierarchical nanoporous structures and applying them as electrodes allowed the demonstration of ultrahigh volumetric energy density supercapacitor devices. In this structure, electrolytes (i.e., ionic liquid) could access all surfaces of the QDs via the created ion “highway” while maintaining the efficient electronic coupling for charge transport. Here we discuss the electrochemical kinetic analysis of the supercapacitor based on the QD hierarchical nanopore (QDHN) electrodes to understand their charge storage mechanism.