http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Chitin and Chitosan Based Hybrid Nanocomposites for Super Capacitor Applications
Anandhavelu, S.,Dhanasekaran, V.,Sethuraman, V.,Park, Hui Joon American Scientific Publishers 2017 Journal of nanoscience and nanotechnology Vol.17 No.2
<P>In this paper, we report a facile low-cost synthesis of the chitin and chitosan-based hybrid nanocomposites for supercapacitors. The chitosan and chitin based hybrid composites functional group analysis, structural, optical and morphological properties were characterized using FTIR spectroscopy, Raman spectroscopy, UV-vis spectroscopy and scanning electron microscopy (SEM), respectively. Specific capacitance values of hybrid composites were calculated using cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge analysis. The hybrid composites asymmetric supercapacitor performance was perceived in the range of -0.2 to 1.0 V. The specific capacitance value was achieved at 542.63 F g(-1) at current density value of 0.1 A g(-1) for CH-GO-ZnO/PANI hybrid composites. The prepared hybrid nanocomposites exhibit good supercapacitive performance and long-term cycle stability. These results demonstrate the potential of the CH-GO-ZnO/PANI hybrid nanocomposites as a high-performance supercapacitors.</P>
Vasanthi V.,Logu T.,Ramakrishnan V.,Anitha K.,Sethuraman K. 한국탄소학회 2020 Carbon Letters Vol.30 No.4
Facile process for the fabrication of multi-layer graphene thin flm (MLGF) is reported here. Multi-layer graphene dispersion prepared by liquid-phase exfoliation of graphite was sprayed on a glass substrate by spray pyrolysis method. The structural, optical and electrical properties of the deposited MLGF are investigated. The sheets of graphene are deposited uniformly on the substrate and distribution of small graphene sheets with size of 300–500 nm can be observed in SEM image. AFM and micro-Raman results ensured that the spray-coated graphene thin flm is composed of multi-layer graphene sheets. Spray coated graphene thin flm showed signifcant optical transparency of 57% in the visible region (400–550 nm). MLGF pos�sessed the electrical conductivity in the order of 744 S/m with surface resistivity of 3.54 k Ω/sq. The prepared liquid-phase exfoliated graphene thin flm showed superior photoelectric response. The results of this study provided a framework for fabricating an optimized MLGF using a spray pyrolysis route for optoelectronics devices.
A. Nagarajan,V. Sethuraman,T.M. Sridhar,R. Sasikumar 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-
In this study, glassy carbon electrode modified by Au@NiO decorated polypyrrole nanocomposite(Au@NiO/PPy-GCE) was fabricated for sensing of cholesterol by non-enzymatic electrochemical method. The composite was characterized by XRD, XPS and morphological studies were examined using FE-SEMand TEM. The redox properties of cholesterol were investigated by cyclic voltammetry. When differentialpulse voltammetry was employed to sense cholesterol, it exhibited a linear range from 1.0 10-5 to1.0 10-4 M, with the sensitivity 7.6 lA lM1 cm2 and detection limit 5.8 x10-7 M. Hence, this compositehas excellent practical applications towards the fabrication of commercial sensors.
Vasudevarao Pasala,Satyanarayana Maddukuri,V. Sethuraman,Rekha Lankipalli,Devi Gajula,Venkateswarlu Manne The Korean Electrochemical Society 2023 Journal of electrochemical science and technology Vol.14 No.3
For electrode stability and the electrochemical performance of the Li-ion cell, it is essential that the active ingredients and unique additives in the polymer binder be well dispersed with the solvent-based slurry. The efficient procedure used to create the slurry affects the rheological characteristics of the electrode slurry. When successively adding different steps of Nmethyl-2-pyrrolidone (NMP) solvent to the cathode composition, it is evenly disseminated. The electrochemical performance of the Li-ion cells and the electrodes made with slurry formed by single step and multiple steps of addition of NMP solvent are examined. To preform rheological properties of cathode electrode slurry on Ni-rich Lithium Nickel-Cobalt-Aluminum Oxide (LiNi<sub>0.80</sub>Co<sub>0.15</sub>Al<sub>0.05</sub>) (NCA). Also, we investigate different step addition of electrode formation and mechanical strength characterization like peel strength. According to the EIS study, a multi-step electrode slurry has lower internal resistance than a single-step electrode slurry, which results in better electrical characteristics and efficiency. Further, microstructure of electrodes is obtained electrochemical performance in the 18650 cylindrical cells with targeted capacity of 1.5 Ah. The slurry of electrodes prepared by single step and multiple steps of addition of NMP solvent and its effect on the fabrication of 1.5 Ah cells. A three-step solvent addition on slurry has been found to be a lower internal resistance than a single-step electrode slurry as confirmed by the EIS analysis, yielding improved electrical properties and efficiency.