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Silver incorporated PEDOT: PSS for enhanced electrochemical performance
디파리파틸,Sachin A. Pawar,황지영,김진혁,Pramod S. Patil,신재철 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.42 No.-
A simple strategy is proposed for the development of silver (Ag) incorporated Poly (3,4-ethylenedioxythiophene):poly (styrene sulfonate) (PEDOT:PSS) electrodes for electrochemical supercapacitors. To examine the effects of the Ag on the specific capacitance and energy density of PEDOT:PSS,its concentration was varied from 0.3 to 1.5 wt.% Ag. Surface morphology of the films is examined by fieldemission scanning electronmicroscopy, which revealed the smooth surface for PEDOT:PSS and existenceof small Ag bright spots onto the smooth surface of PEDOT:PSS for the Ag-PEDOT:PSS. Theelectrochemical activity of PEDOT:PSS was enhanced after its interaction with Ag. An electrode with0.9 wt.% Ag in PEDOT:PSS showed superior specific capacitance (172 Fg 1) and energy density(36.11 WhKg 1) due to the synergistic effect of both Ag and PEDOT:PSS. These results were extensivelyexamined using different characterization tools. This study will provide a new avenue for designing lowcost and excellent electrochemical performance electrode based on Ag-PEDOT:PSS for bettersupercapacitors.
Hexagonal sheets of Co3O4 and Co3O4-Ag for high-performance electrochemical supercapacitors
Sachin A. Pawar,디파리파틸,신재철 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.54 No.-
Hexagonal sheets of Co3O4 on nickel foam were synthesized by a facile, economical, scalable, and one pot hydrothermal method for supercapacitor studies. The electrical conductivity and catalytic activity were enhanced through the decoration of Co3O4 by silver (Ag) nanoparticles using a simple chemical approach. The hexagonal sheets served as an excellent backbone together with the Ag nanoparticles, which gave the composites a superior specific capacitance of 958 F g1 and an energy density of 0.203 kWh kg1. The electrode exhibited excellent cycling stability with a capacitance retention of 104% after the initial 1000 CV cycles with a maximum specific capacitance 996 F g1.
Zinc Cobalt Layered Double Hydroxide Electrode for High-Performance Supercapacitor
사친아파라오파와,Sohyeon Yu,Hyungwoo Seo,Euijin Ju,Jeewan Yeu,Jaemin Kim,디파리파틸,신재철 한국진공학회 2019 Applied Science and Convergence Technology Vol.28 No.5
We aim to fabricate a ZnCo layered double hydroxide (LDH) nanostructure through facile one-pot hydrothermal synthesis. ZnCo LDH with interconnected hexagonal sheets having ultrathin thickness with voids are synthesized for the effective penetration of electrolytes to achieve superior electrochemical properties. The as-synthesized ZnCo LDH nanostructure is then subjected to structural, morphological, phase, and electrochemical studies. As an electrode for a supercapacitor, the ZnCo LDH has an areal capacitance of 1964 mFcm-2 at a 5 mVs-1 scan rate, an energy density of 0.22 mWhcm-2, and an excellent cycling stability (112 %) after 2000 charge–discharge cycles.