Temperature dependent surface morphological modifications of hexagonal WO₃ thin films for high performance supercapacitor application

Shinde, Pragati A.,Lokhande, Abhishek C.,Chodankar, Nilesh R.,Patil, Amar M.,Kim, Jin H.,Lokhande, Chandrakant D. Pergamon Press 2017 Electrochimica Acta Vol. No.

<P><B>Abstract</B></P> <P>In present article, temperature dependent surface morphological modification and its subsequent influence on electrochemical performance of hexagonal WO<SUB>3</SUB> (h-WO<SUB>3</SUB>) thin films has been investigated. The nanostructured h-WO<SUB>3</SUB> films are synthesized on carbon cloth substrate using simple hydrothermal method. It is observed that h-WO<SUB>3</SUB> thin films prepared at temperature of 413, 433 and 453K display nanogranule-like, nanoplate-like and nanorod-like suface morphology. The X-ray diffraction study discloses the prominent orientation along (001) and (200) planes which reveals the preferential growth direction of h-WO<SUB>3</SUB> along c and a-axis, respectively. The h-WO<SUB>3</SUB> film prepared at 453K shows good surface area, pore volume and uniform pore size distribution. The electrochemical measurements exhibit high specific capacitance of 694Fg<SUP>−1</SUP>, energy density of 25 Wh Kg<SUP>−1</SUP> and long term cycling performance (87 % capacitance retention after 2,000 cycles) for h-WO<SUB>3</SUB> thin film. The results indicate that h-WO<SUB>3</SUB> nanorods could be a promising electrode material for high performance energy storage devices.</P>

Small jets in radio‐loud hot DOGs

Lonsdale, C.J.,Whittle, M.,Trapp, A.,Patil, P.,Lonsdale, C.J.,Thorp, R.,Lacy, M.,Kimball, A. E.,Blain, A.,Jones, S.,Kim, M. WILEY‐VCH Verlag 2016 Astronomische Nachrichten Vol.337 No.1

<P>We address the impact of young radio jets on the ISM and star formation in a sample of radiatively efficient, highly obscured, radio AGN with look back times that place them near the peak of the galaxy and BH building era, z similar to 1-3. By selecting systems with a high mid-infrared (MIR) luminosity we aim to identify radiatively efficient ('quasar-mode' or 'radiative-mode') AGN in a peak fueling phase, and by selecting compact radio sources we favor young or re-generated radio jets which are confined within the hosts. By selecting AGN which are very red through the optical-MIR we favor highly obscured systems likely to have been recently merger-triggered and still in the pre-blow-out phase of AGN feedback into the surrounding ISM. ALMA imaging at 345 GHz of 49 sources has revealed that they are accretion dominated, relative to star formation, with luminosities reaching 10(14) L-circle dot. Extensive VLA imaging at 8-10 GHz in both A-array and B-array for 155 sources reveals that the majority of these powerful radio systems are compact on < 2-5 kpc scales while some have resolved structures on 3-25 kpc scales, and a small number have giant radio lobes on hundreds of kpc scales. The majority of the GHz range radio SEDs are typical of optically thin synchrotron, however for the 34 sources with data at more than 2 frequencies, 40% are likely to be CSS, GPS, or HFP sources. VLBA imaging of 62 sources reveals varied morphologies, from unresolved sources to complex multicomponent 1-10 mas scale structures. (C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim</P>

Investigations on silver/polyaniline electrodes for electrochemical supercapacitors

Patil, Dipali S.,Shaikh, J. S.,Pawar, S. A.,Devan, R. S.,Ma, Y. R.,Moholkar, A. V.,Kim, J. H.,Kalubarme, R. S.,Park, C. J.,Patil, P. S. The Royal Society of Chemistry 2012 Physical chemistry chemical physics Vol.14 No.34

<P>Polyaniline (PANI) and silver doped polyaniline (Ag/PANI) thin films were deposited on stainless steel substrates by a dip coating technique. To study the effect of doping concentration of Ag on the specific capacitance of PANI the concentration of Ag was varied from 0.3 to 1.2 weight percent. Fourier transform-infrared and Fourier transform-Raman spectroscopy, and energy dispersion X-ray techniques were used for the phase identification and determination of the doping content in the PANI films, respectively. The surface morphology of the films was examined by Field Emission Scanning Electron Microscopy, which revealed a nanofiber like structure for PANI and nanofibers with bright spots of Ag particles for the Ag/PANI films. There was decrease in the room temperature electrical resistivity of the Ag/PANI films of the order of 10<SUP>2</SUP> with increasing Ag concentration. The supercapacitive behavior of the electrodes was tested in a three electrode system using 1.0 M H<SUB>2</SUB>SO<SUB>4</SUB> electrolyte. The specific capacitance increased from 285 F g<SUP>−1</SUP> (for PANI) to 512 F g<SUP>−1</SUP> for Ag/PANI at 0.9 weight percent doping of Ag, owing to the synergic effect of PANI and silver nanoparticles. This work demonstrates a simple strategy of improving the specific capacitance of polymer electrodes and may also be easily adopted for other dopants.</P> <P>Graphic Abstract</P><P>The presence of Ag nanoparticles on PANI nanofibers provides a least resistance path to electron transportation. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2cp41757j'> </P>

Study on Energy Use Efficiency for Sugarcane Crop Production Using the Data Envelopment Analysis (DEA) Technique

Powar R. V.,Mehetre S. A.,Patil P. R.,Patil R. V.,Wagavekar V. A.,Turkewadkar S. G.,Patil S. B. 한국농업기계학회 2020 바이오시스템공학 Vol.45 No.4

Purpose This study aimed to study the energy use pattern of sugarcane crops, optimize the energy use pattern of an inefficient farmer, and study the opportunities for input energy saving in sugarcane cultivation. Methods The input–output energy in sugarcane cultivation was audited by collecting data from 61 decision-making units (DMUs) using a face-to-face interview with sugarcane growers in Maharashtra state (India). Technical, pure technical, and scale efficiencies for farmers were calculated using the Charnes–Cooper–Rhodes and Banker–Charnes–Cooper models of the data envelopment analysis technique. Results The average total input (EI) and output (Eo) energy for sugarcane cultivation were 146.15 + 11.16 GJ ha−1 and 961.02 ± 83.73 GJ ha−1, respectively. The energy share of sugarcane and sugarcane trash in the total output energy was 843.18 ± 60.4 GJ ha−1 and 91.48 ± 6.5 GJ ha−1, respectively. The energy ratio (ER) and net energy gain of sugarcane cultivation were 6.57 ± 0.57 and 814.8 ± 69.9 GJ ha−1, respectively. The average technical efficiency, pure technical efficiency, and scale efficiency for sugarcane cultivation were 0.74 ± 0.03, 0.97 ± 0.006, and 0.76 ± 0.03, respectively, in the study region. Conclusions The scope for energy saving in sugarcane cultivation was observed to be 19.82% as comparedwith the actual energy required. If the recommendation of energy saving is followed by inefficient DMUs, a total input energy of 28.98 GJ ha−1 can be saved, maintaining a constant output level of sugarcane yield.

Effect of different annealing environments on the solar cell performance of CdSe pebbles

Pawar, S.A.,Patil, D.S.,Suryawanshi, M.P.,Ghorpade, U.V.,Lokhande, A.C.,Park, J.Y.,Chalapathy, R.B.V.,Shin, J.C.,Patil, P.S.,Kim, J.H. Elsevier Science 2016 Acta materialia Vol.108 No.-

<P>Cadmium selenide pebbles have been synthesized by a simple and cost-effective chemical bath deposition method. In order to study the effect of different annealing environments, the CdSe thin films were annealed in air, nitrogen, argon and in a vacuum at 300 degrees C for 1 h. The optical, structural, compositional, and morphological properties of the films were then analyzed using UV-vis spectrophotometry, photoluminescence, X-ray diffraction, X-ray photoelectron spectroscopy, and field emission scanning electron microscopy. XRD patterns revealed the formation of amorphous CdSe thin films. Annealing entails a change in crystal structure, from amorphous to hexagonal. The chemical composition and valence states of the constituent elements were analyzed by XPS. FESEM images showed the formation of CdSe pebbles in all the samples with voids between the pebbles, but the samples annealed in a vacuum had fewer voids than did other samples. Under AM 1.5G illumination, the photoanodes had an improved power conversion efficiency of 1.44% using an aqueous polysulfide electrolyte with a short-circuit photocurrent density of 11.3 mA cm(-2) when CdSe pebbles were annealed in a vacuum. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.</P>

Interior design engineering of CuS architecture alteration with rise in reaction bath temperature for high performance symmetric flexible solid state supercapacitor

Patil, A.M.,Lokhande, A.C.,Chodankar, N.R.,Shinde, P.A.,Kim, J.H.,Lokhande, C.D. THE KOREAN SOCIETY OF INDUSTRIAL AND ENGINEERING 2017 JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY -S Vol.46 No.-

<P>Present work portrays surface morphology alteration of CuS thin film with increase in reaction bath temperature. The porous nanoflowers like morphology of CuS offers higher electron transfer and shorten ion diffusion pathway, which facilitates transfer of electrolyte ions. Nanoflowers like morphology of CuS electrode exhibits specific capacitance (C-s) of 1818.2 F g(-1) at scan rate of 5 mV s(-1) with electrochemical cycling stability of 92%. The symmetric FSS-SCs-PVA-LiClO4 device demonstrates Cs of 172.5 F g(-1), specific power density of 1750 W kg(-1) and capacity retention of 93% after 2000 CV cycles. More importantly, this device glows the panel of 200 red LEDs. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.</P>

Electrochromic performance of the mixed V₂O₅-WO₃ thin films synthesized by pulsed spray pyrolysis technique

Patil, C.E.,Tarwal, N.L.,Jadhav, P.R.,Shinde, P.S.,Deshmukh, H.P.,Karanjkar, M.M.,Moholkar, A.V.,Gang, M.G.,Kim, J.H.,Patil, P.S. Elsevier 2014 Current Applied Physics Vol.14 No.3

Vanadium pentoxide (V<SUB>2</SUB>O<SUB>5</SUB>) mixed tungsten trioxide (WO<SUB>3</SUB>) thin films have been synthesized by a novel pulsed spray pyrolysis technique (PSPT) on glass and fluorine doped tin oxide (FTO) coated glass substrates at 400 <SUP>o</SUP>C. Aqueous solutions of equimolar vanadium chloride and ammonium tungstate were mixed in volume proportions (5%, 10% and 15%) for the deposition of V<SUB>2</SUB>O<SUB>5</SUB>-WO<SUB>3</SUB> thin films. The structural, morphological, optical and electrochemical properties of V<SUB>2</SUB>O<SUB>5</SUB>-WO<SUB>3</SUB> thin films were investigated by FT-IR, XRD, SEM, cyclic voltammetry, chronoamperometry and chronocoulometry techniques. The results showed that the electrochemical properties of V<SUB>2</SUB>O<SUB>5</SUB> were altered by mixing WO<SUB>3</SUB>. All the films exhibited cathodic electrochromism in lithium containing electrolyte (0.5 M LiClO<SUB>4</SUB> + propylene carbonate (PC)). Maximum coloration efficiency (CE) of about 49 cm<SUP>2</SUP> C<SUP>-1</SUP> was observed for the V<SUB>2</SUB>O<SUB>5</SUB> film mixed with 15% WO<SUB>3</SUB>. The electrochemical stability of the sample was examined and it was found to be stable up to 1000 cycles.

Interior design engineering of CuS architecture alteration with rise in reaction bath temperature for high performance symmetric flexible solid state supercapacitor

A.M. Patil,C.D. Lokhande,N.R. Chodanka,P.A. Shinde,J. H. Kim,C.D. Lokhande 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.46 No.-

Present work portrays surface morphology alteration of CuS thinfilm with increase in reaction bathtemperature. The porous nanoflowers like morphology of CuS offers higher electron transfer and shortenion diffusion pathway, which facilitates transfer of electrolyte ions. Nanoflowers like morphology of CuSelectrode exhibits specific capacitance (Cs) of 1818.2 F g 1 at scan rate of 5 mV s 1 with electrochemicalcycling stability of 92%. The symmetric FSS-SCs-PVA-LiClO4 device demonstrates Cs of 172.5 F g 1, specificpower density of 1750 W kg 1 and capacity retention of 93% after 2000 CV cycles. More importantly, thisdevice glows the panel of 200 red LEDs.

Electrochemical supercapacitor properties of highly porous sponge-like selenium thin films

Patil, A.M.,Lokhande, A.C.,Chodankar, N.R.,Kim, J.H.,Lokhande, C.D. Pergamon Press ; Elsevier Science Ltd 2016 International journal of hydrogen energy Vol.41 No.39

<P>The porous nanostructured material is a prime requirement of energy storage devices, as it contributes maximum surface area for charge storage. In present paper, a simple and cost effective electrodeposition route has been adopted to prepare highly porous sponge-like selenium thin films. The selenium surface displays porous nanostructure with specific surface area of 35.9 m(2) g(-1) and suitable pore size, providing auspicious trails for transportation as well as penetration of electrolyte ions. The structural study confirms the formation of trigonal structure. The electrochemical properties of selenium films are reported. The film exhibits maximum specific capacitance (C-s) of 29.25 g(-1) at 5 mV s(-1) scan rate in 1 M Na2SO4 electrolyte along with electrochemical stability of 91% after 1000 cyclic voltammetry (CV) cycles. This investigation implies that selenium thin films in composite form may be useful for charge storage applications. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.</P>

Block-chain based Secure Data Access over Internet of Health Application Things (IHoT)

( A. Ezil Sam Leni ),( R. Shankar ),( R. Thiagarajan ),( Vishal Ratansing Patil ) 한국인터넷정보학회 2023 KSII Transactions on Internet and Information Syst Vol.17 No.5

The medical sector actively changes and implements innovative features in response to technical development and revolutions. Many of the most crucial elements in IoT-connected health services are safeguarding critical patient records from prospective attackers. As a result, BlockChain (BC) is gaining traction in the business sector owing to its large implementations. As a result, BC can efficiently handle everyday life activities as a distributed and decentralized technology. Compared to other industries, the medical sector is one of the most prominent areas where the BC network might be valuable. It generates a wide range of possibilities and probabilities in existing medical institutions. So, throughout this study, we address BC technology's widespread application and influence in modern medical systems, focusing on the critical requirements for such systems, such as trustworthiness, security, and safety. Furthermore, we built the shared ledger for blockchain-based healthcare providers for patient information, contractual between several other parties. The study's findings demonstrate the usefulness of BC technology in IoHT for keeping patient health data. The BDSA-IoHT eliminates 2.01 seconds of service delay and 1.9 seconds of processing time, enhancing efficiency by nearly 30%.