Carbon based manganese oxide (MnO2, MnO2/MWCNT and MnO2/rGO) composite electrodes for high-stability Li-ion batteries

Rosaiah Pitcheri,Divya Ponnusamy,Sambasivam Sangaraju,Tighezza Ammar M.,Kalaivani V.,Muthukrishnaraj A.,Ayyar Manikandan,Niyitanga Theophile,Kim Haekyoung 한국탄소학회 2024 Carbon Letters Vol.34 No.1

Synthesis of extremely competent materials is of great interest in addressing the energy storage concerns. Manganese oxide nanowires (MnO2 NWs) are prepared in situ with multiwall carbon nanotubes (MWCNT) and graphene oxide (GO) using a simple and effective hydrothermal method. Powder XRD, Raman and XPS analysis are utilized to examine the structural characteristics and chemical state of composites. The initial specific discharge capacity of pure MnO2 NWs, MnO2 NWs/MWCNT and MnO2 NWs/rGO composites are 1225, 1589 and 1685 mAh/g, respectively. The MnO2 NWs/MWCNT and MnO2 NWs/rGO composites showed stable behavior with a specific capacity of 957 and 1108 mAh/g, respectively, after 60 cycles. Moreover, MnO2 NWs/rGO composite sustained a specific capacity of 784 mAh/g, even after 250 cycles at a current density of 1 A/g showing outstanding cycling stability.

Mechanical characterisation of glass fibre reinforced with aluminium wire mesh under various analysis

A. Manikandan,G.B. Bhaskar 한양대학교 청정에너지연구소 2024 Journal of Ceramic Processing Research Vol.25 No.2

GFRP (Glass Fiber Reinforced Plastic) known for its high strength and cost-effectiveness. Aluminium wire mesh is alightweight reinforcement material made from aluminium wires woven into a mesh pattern, chosen for its availability,strength, and ability to improve the strength of GFRP structures without adding extra weight. The purpose of this research isto figure out how to make glass fiber metal laminates using aluminium wire mesh and GFRP. Aluminium was chosen for itsavailability, good balance of strength and cost-effectiveness. Glass fibers were also chosen for their strength and affordability. This study’s aim is to enhance the strength of GFRP structures without adding extra weight. To achieve this, the researchersuse Aluminium wire mesh as reinforcement. The purpose of this study is to make better Aluminium wire mesh samples usinga common method without making them heavier. The aim is to make GFRP structures stronger without making them heavier,making them better for their intended use by the conventional hand-layup method.

Mechanical Milling and Synthesis of Mg-SiC Composites Using Underwater Shock Consolidation

A. Nayeem Faruqui,P. Manikandan,T. Sato,Y. Mitsuno,K. Hokamoto 대한금속·재료학회 2012 METALS AND MATERIALS International Vol.18 No.1

In this work, mechanical milling of magnesium with SiC particles with variation of parameters, such as ball-to-powder ratio, milling speed, milling time, and process controlling agent (PCA), is reported. Milling was also conducted without using PCA to explore its role on the mechanical milling process. Milling was performed in a planetary ball mill. The results show that a uniform distribution of the reinforcement, good particle yield, and particle size reduction can be achieved by controlling the parameters. The milling powders were compacted using the underwater shock wave generated by the detonation of an explosive. The samples were characterized by XRD, scanning electron microscopy, and microhardness testing. Microstructural charac-terization revealed a well flown magnesium matrix enveloping reasonably well dispersed SiC particles. The results of microhardness testing reveal an increase in the hardness of the composite.

Structural, optical and magnetic properties of Fe3O4 nanoparticles prepared by a facile microwave combustion method

A. Manikandan,J. Judith Vijaya,J. Arul Mary,L. John Kennedy,A. Dinesh 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4

Iron oxide (Fe3O4) nanoparticles were synthesized by a facile microwave combustion method. X-ray diffraction and energy dispersive X-ray spectroscopy results showed that the as-prepared product was pure Fe3O4 without any impurity. The mechanism for the formation of Fe3O4 by microwave combustion method is also discussed. Microwave combustion produced sufficient energy for the formation of Fe3O4, because of its homogeneous distribution within the raw materials. This results in the formation of nanoparticles, early phase formation and different morphologies within few minutes. Magnetic analysis revealed that the Fe3O4 nanoparticles had ferromagnetic behavior at room temperature with saturation magnetization of 66.12 emu/g.

Fuzzy Controlled ZVS Asymmetrical PWM Full-bridge DC-DC Converter for Constant load High Power Applications

Marikkannan. A,Manikandan. B.V 대한전기학회 2017 Journal of Electrical Engineering & Technology Vol.12 No.3

This paper proposes a fuzzy logic controlled new topology of high voltage gain zero voltage switching (ZVS) asymmetrical PWM full-bridge DC-DC boost converter for constant load and high power applications.The APWM full-bridge stage provides high voltage gain and soft-switching characteristics increase the efficiency and reduce the switching losses. Fuzzy logic controller (FLC) improves the performance and dynamic characteristics of the proposed converter. A comparison with a classical proportional-integral (PI) controller demonstrates the high performances of the proposed technique in terms of effective output voltage regulation under different operating conditions. Simulation is done by integrating two different simulation platforms PSIM<SUP>®</SUP> and Matlab<SUP>®</SUP>/Simulink<SUP>®</SUP> by using SimCoupler tool of PSIM<SUP>®</SUP>. Experimental results using 120W load have been provided to validate the results.

Delay Reduction by Providing Location Based Services using Hybrid Cache in peer to peer Networks

( C. Gopala Krishnan ),( A. Rengarajan ),( R. Manikandan ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.6

Now a days, Efficient processing of Broadcast Queries is of critical importance with the ever-increasing deployment and use of mobile technologies. BQs have certain unique characteristics that the traditional spatial query processing in centralized databases does not address. In novel query processing technique, by maintaining high scalability and accuracy, latency is reduced considerably in answering BQs. Novel approach is based on peer-to-peer sharing, which enables us to process queries without delay at a mobile host by using query results cached in its neighboring mobile peers. We design and evaluate cooperative caching techniques to efficiently support data access in ad hoc networks. We first propose two schemes: Cache Data, which caches the data, and Cache Path, which caches the data path. After analyzing the performance of those two schemes, we propose a hybrid approach (Hybrid Cache), which can further improve the performance by taking advantage of Cache Data and Cache Path while avoiding their weaknesses. Cache replacement policies are also studied to further improve the performance. Simulation results show that the proposed schemes can significantly reduce the query delay and message complexity when compared to other caching schemes.

Influence of Annealing on Microstructure and Tribological Properties of AlCoCrFeNiTi High Entropy Alloy Based Coating

Himanshu Kumar,Gaurav A. Bhaduri,S. G. K. Manikandan,M. Kamaraj,S. Shiva 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.3

The primary focus of the study is to explore the influence of annealing on the various properties like phase formation,microstructure evolution and wear analysis of equiatomic AlCoCrFeNiTi high entropy alloy (HEA) coatings developed byatmospheric plasma spray technique. Post deposition, annealing was performed at three different temperatures of 700 °C,900 °C and 1200 °C, respectively, for a time period of 180 min. X-ray diffraction (XRD) studies revealed that AlCoCrFeNiTiHEA coating comprises two BCC solid solution phases. The deposited samples were characterized using scanning electronmicroscopy (FESEM), surface profilometer, chemical analysis using x-ray photoelectron spectroscopy (XPS) and Fouriertransform infra-red spectroscopy (FTIR). The dilution level study revealed the strong metallurgical bonding between coatingand substrate. Microhardness of the AlCrCoFeNiTi was found to be marginally decreased by increasing the annealingtemperature due to coarsening of grains and the deposited coating microhardness was found to be 768.48 ± 16 HV0.2. Weartest analysis performed using the ball-on disc test revealed that, there is a significant decrease in wear resistance after heattreatment at 1200 °C. Beyond 900 °C, annealing decreased the microhardness and wear resistance due to coarsening ofgrains. The wear volume rate of the unannealed as-deposited coating was found to be 2.8 × 10–7 mm3N−1 m−1 and the coatingannealed at 700 °C, 900 °C, and 1200 °C had a wear volume rate of about 2.89 × 10–7 mm3 N−1 m−1, 2.87 × 10–7 mm3 N−1 m−1,7.29 × 10–7 mm3 N−1 m−1, respectively.

Study of Deformation Mechanisms of a High-Purity α-Titanium Plate Under Monotonic Loading with the EVPSC-TDT Model

Himanshu Kumar,Gaurav A. Bhaduri,S. G. K. Manikandan,M. Kamaraj,S. Shiva 대한금속ᆞ재료학회 2023 METALS AND MATERIALS International Vol.29 No.2

The primary focus of the study is to explore the influence of annealing on the various properties like phase formation,microstructure evolution and wear analysis of equiatomic AlCoCrFeNiTi high entropy alloy (HEA) coatings developed byatmospheric plasma spray technique. Post deposition, annealing was performed at three different temperatures of 700 °C,900 °C and 1200 °C, respectively, for a time period of 180 min. X-ray diffraction (XRD) studies revealed that AlCoCrFeNiTiHEA coating comprises two BCC solid solution phases. The deposited samples were characterized using scanning electronmicroscopy (FESEM), surface profilometer, chemical analysis using x-ray photoelectron spectroscopy (XPS) and Fouriertransform infra-red spectroscopy (FTIR). The dilution level study revealed the strong metallurgical bonding between coatingand substrate. Microhardness of the AlCrCoFeNiTi was found to be marginally decreased by increasing the annealingtemperature due to coarsening of grains and the deposited coating microhardness was found to be 768.48 ± 16 HV0.2. Weartest analysis performed using the ball-on disc test revealed that, there is a significant decrease in wear resistance after heattreatment at 1200 °C. Beyond 900 °C, annealing decreased the microhardness and wear resistance due to coarsening ofgrains. The wear volume rate of the unannealed as-deposited coating was found to be 2.8 × 10–7 mm3N−1 m−1 and the coatingannealed at 700 °C, 900 °C, and 1200 °C had a wear volume rate of about 2.89 × 10–7 mm3 N−1 m−1, 2.87 × 10–7 mm3 N−1 m−1,7.29 × 10–7 mm3 N−1 m−1, respectively.

Structural, optical and photovoltaic properties of V2O5/ZnO and reduced graphene oxide (rGO)-V2O5/ZnO nanocomposite photoanodes for dye-sensitized solar cells

Lakshmi C. Bhagya,Venus S. Anna,Velanganni S.,Muthukrishnaraj A.,Ayyar Manikandan,Henini Mohamed 한국탄소학회 2024 Carbon Letters Vol.34 No.1

Recently, dye-sensitized solar cells (DSSCs) can be seen as a talented alternate to the conservative photovoltaic strategies and has fascinated significant consideration as they offer the opportunity for low-cost and also high alteration photovoltaic (PV) energy [1,2,3]. Over the last decade, researchers have concentrated on developing a photoanode (working electrode) with a diversity of morphologies in order to expand the proficiency of DSSCs. TiO2 is the greatest often active photoanode substantial in DSSCs, owing to its porosity and durable catalytic nature. Recently discovered interface properties such as charge departure, converse recombination, and tricking of photogenerated electrons in semiconductor device outsides self-sufficiently by defining optimal material mixtures and their gathering [4, 5]. To maximize overall energy conversion efficiency (ECE), it is essential to construct a combination of materials consisting of various metal oxide semiconductors (MOS) that reduces recombination currents, improves light absorption, ensures a good electric connection.

Modelling and analysis on the removal of methylene blue dye from aqueous solution using physically/chemically modified Ceiba pentandra seeds

G. Manikandan,P. Senthil Kumar,A. Saravanan 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.62 No.-

In this research, batch adsorptions of methylene blue (MB) dye using physically and chemically activated Ceiba pentandra seeds (PACP and CACP) have been inspected. SEM-EDAX and XRD analysis for adsorbents have been studied. The acquired consequences of isotherm and kinetic investigations exhibit that Freundlich and pseudo-first order models demonstrated better association. Langmuir adsorption capacity of PACP and CACP was observed as 324.01 and 469.4 mg/g, respectively. Sticking probability for MB dye was found to be high. This adsorption process was unconstrained and exothermic in nature. This modified materials has an ability to remove MB dye from polluted water.