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K. Karuppasamy,김동규,강용희,K. Prasanna,이희우 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.52 No.-
In the present work, a new methodology for improving the ionic conductivity and cation transportproperties of polymer electrolytes have been synthesized by adding bulky anion based novel lithiumbisnonafluoro-1-butanesulfonimidate salt and characterized for its applications in lithium ion batteries. The self-standing solid polymer electrolytefilms exhibit excellent mechanical, thermal, andelectrochemical stability. The ion–polymer interactions are examined thoroughly by ATR FourierTransform-Infra Red Spectroscopy. The solid polymer electrolyte prepared with EO/Li ratio 14 exhibits ahighest ionic conductivity of 10 4 S cm 1 at 333 K. Also, it achieves a maximum lithium transferencenumber of 0.31 and it is electrochemically stable in the scanned electrochemical window. This new typeof polymer electrolytes with high ion conductivity and improved mechanical properties paves way to be apotential candidate along with lithium anode and LiCoO2 cathode in the lithium ion batteries.
Karuppasamy, K.,Kim, Dongkyu,Kang, Yong Hee,Prasanna, K.,Rhee, Hee Woo Elsevier 2017 Journal of industrial and engineering chemistry Vol.52 No.-
<P><B>Abstract</B></P> <P>In the present work, a new methodology for improving the ionic conductivity and cation transport properties of polymer electrolytes have been synthesized by adding bulky anion based novel lithium bisnonafluoro-1-butanesulfonimidate salt and characterized for its applications in lithium ion batteries. The self-standing solid polymer electrolyte films exhibit excellent mechanical, thermal, and electrochemical stability. The ion–polymer interactions are examined thoroughly by ATR Fourier Transform-Infra Red Spectroscopy. The solid polymer electrolyte prepared with EO/Li ratio 14 exhibits a highest ionic conductivity of 10<SUP>−4</SUP> Scm<SUP>−1</SUP> at 333K. Also, it achieves a maximum lithium transference number of 0.31 and it is electrochemically stable in the scanned electrochemical window. This new type of polymer electrolytes with high ion conductivity and improved mechanical properties paves way to be a potential candidate along with lithium anode and LiCoO<SUB>2</SUB> cathode in the lithium ion batteries.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A novel LiBNFSI based SPEs have been prepared and characterized for its applications in lithium ion batteries. </LI> <LI> The prepared self-standing SPE films exhibit excellent mechanical, thermal, and electrochemical stability. </LI> <LI> These electrolytes give maximum ionic conductivity and electrochemical stability at ambient temperature. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Karuppasamy, K.,Prasanna, K.,Ilango, P. Robert,Vikraman, Dhanasekaran,Bose, Ranjith,Alfantazi, Akram,Kim, Hyun-Seok Elsevier 2019 Journal of industrial and engineering chemistry Vol.80 No.-
<P><B>Abstract</B></P> <P>In the present work, a porous nano-carbon (PNC) based electrode materials were successfully derived from the natural biopolymer phytagel via a facile hydrothermal and combustion process. The carbon phase structure of the PNC electrode was confirmed using different spectroscopy, microscopy and N<SUB>2</SUB> adsorption-desorption analyses. The surface morphology investigation showed a distinct shape and size for the PNC that demonstrated its porous nature. The electrochemical performance of PNC was completely reliant on the calcination temperature (800°C) and it delivered the maximum capacitance of 122Fg<SUP>−1</SUP> at 0.25Ag<SUP>−1</SUP>. An AC impedance and cyclic voltammetry analyses proved the intrinsic electrochemical behavior by their cycling. Besides, the fabricated symmetric solid-state supercapacitor displayed an outstanding cycle durability with a stable capacitance retention of 85.8% over 8000 cycles, suggesting favorable prospects for its use as an active candidate for symmetric solid-state supercapacitor applications.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Karuppasamy, K.,Jothi, Vasanth Rajendiran,Vikraman, Dhanasekaran,Prasanna, K.,Maiyalagan, T.,Sang, Byoung-In,Yi, Sung-Chul,Kim, Hyun-Seok Elsevier 2019 APPLIED SURFACE SCIENCE - Vol.478 No.-
<P><B>Abstract</B></P> <P>Exploring efficient electrocatalyst for H<SUB>2</SUB> evolution reaction (HER) and replacing the noble metal-based catalysts with inexpensive non-noble metal-based HER catalyst is of great importance for the practicality of hydrogen powered clean technologies. Here, we explore a new class of metal organic framework (MOF) composite (NiMo polyhedron) as an active electrocatalyst material for HER application - synthesized through the conventional hydrothermal process. The bimetallic MOF system having grown on Nickel foam (NiMo/NiMoO<SUB>4</SUB>@NC/NF) delivers higher catalytic activity by achieving a current density of 10 mA cm<SUP>−2</SUP> at a low overpotential of 80 mV, with a Tafel slope of 98.9 mV dec<SUP>−1</SUP> (0.5 M H<SUB>2</SUB>SO<SUB>4</SUB>), comparing favorably with the electrochemical enactment of existing bimetallic MOF-based catalysts. The enhanced HER activity of the synthesized MOF, is primarily due to the structural merits of MOF and the synergy between the MOF and the guest species (Ni and Mo metal atoms). Adding to the excellent HER performance, the electrode also exhibits good stability in acidic medium for a prolonged duration of 24 h. Hence, the synthesized low-cost, non-Pt electrode MOFs with its greater HER performance can be an auspicious applicant as an HER catalyst for water splitting and hydrogen generation applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Noble, Pt free alternate electrocatalysts for HER were identified. </LI> <LI> Ni, Mo based bimetallic MOFs were prepared by hydrothermal process. </LI> <LI> The synthesized NiMO-MOFs possessed polyhedron morphology. </LI> <LI> It achieved a current density of 10 mA cm<SUP>−2</SUP> at a low overpotential of 98.9 mV. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
K. Karuppasamy,K. Prasanna,P. Robert Ilango,Dhanasekaran Vikraman,Ranjith Bose,Akram Alfantazi,김현석 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-
In the present work, a porous nano-carbon (PNC) based electrode materials were successfully derivedfrom the natural biopolymer phytagel via a facile hydrothermal and combustion process. The carbonphase structure of the PNC electrode was confirmed using different spectroscopy, microscopy and N2adsorption-desorption analyses. The surface morphology investigation showed a distinct shape and sizefor the PNC that demonstrated its porous nature. The electrochemical performance of PNC wascompletely reliant on the calcination temperature (800 C) and it delivered the maximum capacitance of122 F g 1 at 0.25 Ag 1. An AC impedance and cyclic voltammetry analyses proved the intrinsicelectrochemical behavior by their cycling. Besides, the fabricated symmetric solid-state supercapacitordisplayed an outstanding cycle durability with a stable capacitance retention of 85.8% over 8000 cycles,suggesting favorable prospects for its use as an active candidate for symmetric solid-state supercapacitorapplications.
Sivalingam Ramesh,K. Karuppasamy,Dhanasekaran Vikraman,김은현,Lama Sanjeeb,이영준,김현석,김주형,김흥수 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.101 No.-
Nano-sized cobalt oxide decorated nitrogen-doped graphene oxide (Co3O4@NGO) composite was producedby a feasible and cost-effective hydrothermal route for electrochemical supercapacitors and gassensor applications. The composite materials formation was ascertained by Raman spectroscopy, X-raydiffraction, and X-ray photo electron spectroscopy analyses. Field emission scanning electron microscopy(FE-SEM) and field emission transmission electron microscopy (FE-TEM) results explored the controllednanoscale-sized sheet-like morphology for the prepared composite materials. Electrochemical storageproperties were studied by cyclic voltammetry (CV), galvanostatic charge–discharge process (GCD),and electrochemical impedance spectroscopy analyses using three-electrode configuration with 3 MKOH electrolyte. The observed results showed ~466 F/g specific capacitance at a current density of 1A/g for Co3O4@NGO composite structure with the capacity retention of 96 % after 5000 cycles. Further,the synthesized Co3O4@NGO composite revealed improved detection response, cyclability, and linearityfor dimethyl methyl phosphonate vapor gas sensing. The synthesized composite also demonstratedexcellent selectivity, stability, sensitivity, and rapid response time.
Ramesh, Sivalingam,Karuppasamy, K.,Msolli, Sabeur,Kim, Hyun-Seok,Kim, Heung Soo,Kim, Joo-Hyung The Royal Society of Chemistry 2017 New journal of chemistry Vol.41 No.24
<P>Nitrogen doped graphene oxide (NGO) has been widely used to investigate active electrode materials for high-performance supercapacitors. NGO has attracted wide attention due to the efficient method of doping with GO, which can increase the electron mobility, leading to desirable electrochemical properties. Therefore, in the present study we focus on the ternary hybrid composite of NiO/MnO2@nitrogen-doped graphene oxide, which was synthesized <I>via</I> a hydrothermal process. The synthesized hybrid nanocomposite was characterized using Raman spectra, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDX), and field-emission transmission electron microscopy (FE-TEM). The structural and morphological studies of the hybrid nanocomposite shows its nanocrystalline behaviour. The nanocrystalline hybrid composite exhibited a high specific capacitance of 1490 F g<SUP>−1</SUP> at a current density of 0.5 A g<SUP>−1</SUP>, energy density of 477 W h kg<SUP>−1</SUP>, and power density of 1844 W kg<SUP>−1</SUP>, together with good rate capability and cyclic stability. The results show a good specific capacitance retention of ∼98% after 2000 continuous charge-discharge cycles; this indicates that the hybrid nanocomposite can be a promising electroactive material for supercapacitors. The improved performance of the NiO@MnO2/NGO electrode structure means that it offers an effective way to fabricate high performance supercapacitors.</P>
Ambika, C.,Karuppasamy, K.,Vikraman, Dhanasekaran,Lee, Ji Young,Regu, T.,Ajith Bosco Raj, T.,Prasanna, K.,Kim, Hyun-Seok Elsevier 2018 Solid state ionics Vol.321 No.-
<P><B>Abstract</B></P> <P>Proton-conducting polymer electrolyte systems (PVP-MSA), with polyvinylpyrrolidone as a host polymer and methanesulfonic acid as a proton donor, were prepared by a facile solution-cast technique. The effects of plasticizer, dimethyl carbonate, on the electrical and electrochemical properties of PVP-MSA complexes were plausibly investigated for the first time. The complexation behaviors of both plasticized and unplasticized polymer electrolyte systems were confirmed with the aid of Fourier transform infrared spectroscopy. The conductivity values were found to be enhanced due to the addition of DMC, and a maximum value of 3.27 × 10<SUP>−5</SUP> S/cm was achieved. The ionic transport number values were found to be in the range of 0.96–0.99. The discharge analysis suggested that the proton battery constructed with the plasticized polymer electrolyte showed better performance compared to that constructed with the unplasticized polymer electrolyte, which in turn means it could be utilized as a promising candidate for primary proton batteries.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Proton conducting plasticized solid polymer electrolytes (SPEs) has been prepared by facile solution cast technique. </LI> <LI> The electrochemical properties of SPEs have analyzed and compared for both plasticized and unplasticized systems. </LI> <LI> The plasticized SPEs show better protonic conductivity of 3.27 × 10<SUP>−5</SUP> S/cm at ambient temperature. </LI> <LI> The ionic transport number values are found to be in the range of 0.96–0.99. </LI> <LI> The plasticized SPE system possesses superior discharge characteristic performances as compared to unplasticized one. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
A. Kathalingam,Karuppasamy Pandian Marimuthu,K. Karuppasamy,Yeon‑Sik Chae,Hyungyil Lee,Hyun‑Chang Park,Hyun‑Seok Kim 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.6
We report the structural characterization and nanomechanical properties of platinum (Pt) thin films prepared through facileelectrochemical synthesis. The Pt thin films were coated onto indium tin oxide (ITO)/glass substrates by two-electrode electrochemicaldeposition at room temperature. They were characterized using X-ray diffraction, scanning electron microscopy,and atomic force microscopy for structural and morphological analyses. Indentation depth-dependent hardness and elasticmodulus of the prepared films were analyzed using the nanoindentation technique. Furthermore, the mechanical propertiesof the ITO/glass substrates were also investigated to understand the influence of the substrate on the film properties. Theprepared films showed reasonable mechanical and structural properties suitable for device applications. Finally, the photoconductivityeffect of the prepared Pt film was also studied to determine its suitability for device applications. The Pt filmwas also coated on Cu plates to check substrates effects on this electrochemical deposition, and found that the Cu platesproduced well adherent smooth films.