Calcined chicken eggshell electrode for battery and supercapacitor applications

Minakshi, Manickam; Higley, Stephen; Baur, Christian; Mitchell, David R. G.; Jones, Robert T.; Fichtner, Maximilian

doi:10.1039/c9ra04289j

Cited by 86 publications

(54 citation statements)

References 38 publications

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“…Mrad/s, the Bode diagram of the transfer function, Y(s), is shown in Figure 5. It can be seen from Figure 5 that the second-order generalized integrator can effectively extract the high-frequency component 0  at 40,400 Trad/s to realize the bandpass filter function [23][24][25].…”

Section: Fault Signal Measurement and Diagnosismentioning

confidence: 99%

“…The function Y(s) exhibits a band-pass filtering characteristic, and the amplitude gain at 0  is 0, indicating that Y(s) has no attenuation on the input signal at  ; The phase frequency characteristics It can be seen from Figure 5 that the second-order generalized integrator can effectively extract the high-frequency component ω 0 at 40,400 Trad/s to realize the bandpass filter function [23][24][25]. The function Y(s) exhibits a band-pass filtering characteristic, and the amplitude gain at ω 0 is 0, indicating that Y(s) has no attenuation on the input signal at ω 0 ; The phase frequency characteristics of Y(s)' at ω 0 pass from positive 90 degrees to negative 90 degrees indicates that Y(s) has no phase delay to the input signal at ω 0 .…”

Section: Fault Signal Measurement and Diagnosismentioning

confidence: 99%

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Inter-turn Fault Identification of Surface-Mounted Permanent Magnet Synchronous Motor Based on Inverter Harmonics

Gao

Zhang

et al. 2020

Energies

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Inter-turn short-circuit faults can lead to further faults in motors. This makes monitoring and identifying such faults particularly important. However, because of interference in their working environment, fault signals can be weak and difficult to detect in permanent magnet synchronous motors. This paper proposes a method for overcoming this by extracting the inverter harmonics as an excitation source and then extracting characteristic of fault measurements from the negative sequence voltage. First of all, a model of permanent magnet synchronous motor faults is established and a fault negative sequence voltage is introduced to calculate the fault indicators. Then the high frequency harmonic excitation in the voltage is extracted. This is injected into the original voltage signal and the high frequency negative sequence component is separated and detected by a second-order generalized integrator. Simulation results show that the proposed method can effectively identify inter-turn short-circuit faults in permanent magnet synchronous motors while remaining highly resistant to interference. The method is especially effective when the severity of the fault is relatively small and the torque is relatively large.

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Section: Fault Signal Measurement and Diagnosismentioning

confidence: 99%

Section: Fault Signal Measurement and Diagnosismentioning

confidence: 99%

Inter-turn Fault Identification of Surface-Mounted Permanent Magnet Synchronous Motor Based on Inverter Harmonics

Gao

Zhang

et al. 2020

Energies

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“…However, the synergistic effects of electrochemically deposited mixed metal oxides to allow tuning the properties of the material has not been widely reported for pseudocapacitors. Using biowaste eggshell is not only beneficial for waste management but also creates a value‐added product in the market. We have demonstrated the eggshell material in one of our previous reports and have shown its potential to be used in an electrochemical cell.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Electrochemical Energy Storage Device Using Sustainable Electrode Materials

et al. 2020

Self Cite

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A new electrochemical energy storage device, comprising a faradaic rechargeable pseudo-capacitor type electrode with a non-faradaic rechargeable capacitor electrode, is successfully developed for potential applications in smart electric grids. Mapping new electrodes possessing both high energy and power densities as well as long cycle life is vital for the sustainable energy management. In this work, we present a new approach to design electrodes, fabricated from sustainable resources by hybridizing calcined eggshell capacitor anode with a mixed binary metal oxide pseudo-capacitor cathode. Calcium carbonate (calcite), obtained from the biowastederived eggshell, is an effective electrode material and operates via accumulation of ions on the electrode surface, providing a high discharge capacitance of 100 F/g through a non-faradaic process. The calcite present in eggshells is found to be a valuable renewable resource which can be utilized for energy storage through suitable process design. Otherwise, such potentially useful materials (eggshells) are generally discarded as landfill. The mixed binary metallic oxide (NiO/Co 3 O 4 ) showed a typical pseudocapacitive behaviour associated with both charge transfer reactions and electrostatic means provided a high discharge capacitance of 225 F/g. The fabricated prototype hybrid device provides an energy density 35 Wh/Kg at a power density 420 W/Kg. The charge storage characteristics of the hybrid device depend heavily on the current rate employed. The design and fabrication of new sustainable electrode materials provides an understanding of materials and their electrochemical performance in the high-voltage window.[a] Dr.

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“…Contrary to the conventional agricultural wastes including coconut shell, corncob, bamboo, pitch stone, etc. researchers have been exploring novel precursors such as biowaste chicken eggshell containing high amount of calcium carbonate for the fabrication of new supercapacitive materials [101,102]. For designing such high performance materials with tunable surface textural properties, nanopores engineering, control of hierarchical nanoporous structure, and novel supercapacitive materials, concept of nanoarchitectonics would be very useful.…”

Section: Introductionmentioning

confidence: 99%

Nanoarchitectonics of Nanoporous Carbon Materials in Supercapacitors Applications

et al. 2020

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High surface area and large pore volume carbon materials having hierarchical nanoporous structure are required in high performance supercapacitors. Such nanoporous carbon materials can be fabricated from organic precursors with high carbon content, such as synthetic biomass or agricultural wastes containing cellulose, hemicellulose, and lignin. Using recently developed unique concept of materials nanoarchitectonics, high performance porous carbons with controllable surface area, pore size distribution, and hierarchy in nanoporous structure can be fabricated. In this review, we will overview the recent trends and advancements on the synthetic methods for the production of hierarchical porous carbons with one- to three-dimensional network structure with superior performance in supercapacitors applications. We highlight the promising scope of accessing nanoporous graphitic carbon materials from: (i) direct conversion of single crystalline self-assembled fullerene nanomaterials and metal organic frameworks, (ii) hard- and soft-templating routes, and (iii) the direct carbonization and/or activation of biomass or agricultural wastes as non-templating routes. We discuss the appealing points of the different synthetic carbon sources and natural precursor raw−materials derived nanoporous carbon materials in supercapacitors applications.

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Calcined chicken eggshell electrode for battery and supercapacitor applications

Abstract: Biowaste eggshell can be used as a cathode while in its calcined form and it is found to be suitable as an anode in an electrochemical cell.

Cited by 86 publications

References 38 publications

Inter-turn Fault Identification of Surface-Mounted Permanent Magnet Synchronous Motor Based on Inverter Harmonics

Inter-turn Fault Identification of Surface-Mounted Permanent Magnet Synchronous Motor Based on Inverter Harmonics

A Hybrid Electrochemical Energy Storage Device Using Sustainable Electrode Materials

Nanoarchitectonics of Nanoporous Carbon Materials in Supercapacitors Applications

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