Papers by Keyword: Super Capacitor

Abstract: Trivalent metal cations are the basic composition of Layered Double Hydroxides (LDHs), however, the effect of metal cations on the supercapacitor performance of LDHs prepared from electroplating sludge has not been reported. In the present study the acid leaching solution of electroplating sludge was used as raw material, and Cr, Fe, Al and other common metal cations were added into the precursors to investigate the effect of trivalent metal cations on the supercapacitor performance of LDHs prepared from electroplating sludge. The experimental results show that the three kinds of metal cations can inhibit the specific mass capacitance of LDHs, and the sequence of inhibition effect is Fe < Al < Cr. This experiment is expected to provide some references for the resource utilization of electroplating sludge.

Abstract: Present work illustrates synthesis of Cr doped WO₃ nanostructures (NS) (2 wt. %, 4 wt. % and 6 wt. %) by co precipitation method using surfactants and reported enhanced impedance, capacitance-voltage and current-voltage (I-V) characteristics. NS were characterized by cyclic voltammetry (CV), scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Visible (UV-Vis) spectroscopy, pelletized samples performed I-V, C-V and impedance measurements. Impedance results reveal that the pelletized samples of highest doped Cr showed remarkable increase in admittance with respect to the biased voltage. I-V characteristics of highest doped Cr exhibited enhanced surface conductivity as compared with applied current. The output power considerably increases for the 6 wt. % of Cr doped WO₃ and doping percentage of Cr increases surface conductivity, power output, admittance considerably enhances in the material matrix. This work demonstrated that Cr doped WO₃ has more sensitivity towards I-V, C-V and impedance value considerably varies with the applied bias voltage. The limitation is not certain in case of doped nanomaterials of Cr-WO₃, since these materials possesses nonlinear properties and can find applications in the diversified filed of nano electronics. The authors reported work can be a key guide for the upcoming researchers in the area of biomedical devices, nanoelectronics, sensors, wherein Cr-WO₃ NS finds applications because of its enhanced I-V, C-V, Impedance characteristics. The work has been carried out to understand the electrical and electronic properties of doped nanomaterials in the original work place and analysis has been carried out at various institutions where the provisions for the experimentation is being made.

Abstract: Electricity is very vital in our day to day life. The motive of our journal is to generate electricity from the from the exhaust gases of an internal combustion engine by the principle of Seebeck effect.Exhaust gases from an automobile bring out the excess heat generated which would be very high.The idea is to convert this exhaust heat to another form of energy i.e., electricity with the help of thermoelectric devices like thermocouples, thermopiles, Peltier device. The voltage generated by the thermocouple is very small and many thermocouples are required to make a practical thermoelectric generator. If a loop is made from wires using two dissimilar metals, a voltage will appear between the junctions of the wires if one junction is hotter than the other. Such a loop made with dissimilar metals is known as a thermocouple and the phenomenon is named the Seebeck effect. A semi conductor thermocouple device named Peltier device is used to convert the exhaust heat generated from an automobile into electricity.

Abstract: Hybrid technology is widely recognized as the most effective measure to reduce the fuel consumption in Load-Haul-Dump (LHD). Using a hybrid power system on LHD is proposed. This comprises an internal combustion engine and super capacitor. LHD has the characteristics of duty cycle. Based on the characteristics we get the hydraulic power demand,electric transmission power demand. We propose an energy control strategy to reasonably distribute power of hybrid energy sources. With the help of control strategy, super capacitor can be restricted to work in a pre-defined range of SOC characterized by higher efficiency region. We also analyze the super capacitor charging/discharging process. In order to realize the fuel economy fullest, we optimize the design parameter using the simulated annealing algorithm. The simulation results show that improvement in fuel economy was about 11.3% better than that of before the optimization.