Effect of Na2SO4 on the Performance of Mg-Air Battery

2016 ◽  
Vol 847 ◽  
pp. 46-49
Author(s):  
Yan Chun Zhao ◽  
Guang Sheng Huang ◽  
Ding Kai Liu ◽  
Ting Zhuang Han ◽  
Fu Sheng Pan
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Constant Current ◽  
Air Cathode ◽  
Moisture Barrier ◽  
Discharge Performance ◽  
Air Battery ◽  
Different Content ◽  
Discharge Potential ◽  
Discharge Test

In this study, an Mg-air battery based on air cathode with different content of Na2SO4 was prepared to study the effect of Na2SO4 on the performance of Mg-air battery. The electrochemical performance of the air cathode was studied by potentiodynamic polarization and electrochemical impedance spectroscopy. The results indicated that the electrochemical activity of the electrode enhanced with the increasing Na2SO4. The discharge performance of the battery was investigated by constant-current discharge test, and the results showed that the discharge potential of the battery also improved with the increasing of Na2SO4. However, the forming of air cathode became difficult gradually with the increasing content of Na2SO4. What is worse, the oversize pore produced in the moisture barrier when the content of Na2SO4 was too high and the moisture barrier would lose resistance to water. So the content of Na2SO4 should not be too high.

scholarly journals Discharge performance and dynamic behavior of refuellable zinc-air battery

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Woranunt Lao-atiman ◽  
Sorin Olaru ◽  
Amornchai Arpornwichanop ◽  
Soorathep Kheawhom
Keyword(s):  
Dynamic Behavior ◽  
Discharge Current ◽  
Storage System ◽  
Cell Voltage ◽  
Energy Storage System ◽  
Constant Current ◽  
Discharge Data ◽  
Discharge Performance ◽  
Air Battery ◽  
Random Step

Abstract Zinc-air batteries (ZABs) are considered a promising energy storage system. A model-based analysis is one of the effective approaches for the study of ZABs. This technique, however, requires reliable discharge data as regards parameter estimation and model validation. This work, therefore, provides the data required for the modeling and simulation of ZABs. Each set of data includes working time, cell voltage, current, capacity, power, energy, and temperature. The data can be divided into three categories: discharge profiles at different constant currents, dynamic behavior at different step changes of discharge current, and dynamic behavior at different random step changes of discharge current. Constant current discharge profile data focus on the evolution of voltage through time. The data of step changes emphasize the dynamic behavior of voltage responding to the change of discharge current. Besides, the data of random step changes are similar to the data of step changes, but the patterns of step changes are random. Such data support the modeling of a zinc-air battery for both theoretical and empirical approaches.

scholarly journals Microstructure and Discharge Performance of Aluminum Al 6061 Alloy as Anode for Electrolyte Activated Battery

2020 ◽  
Vol 49 (12) ◽  
pp. 3243-3254
Author(s):  
Priyathashiny Pongali ◽  
Wai Yin Wong ◽  
Alvie Sin Voi Lo ◽  
Sammy Lap Ip Chan ◽  
Kean Long Lim
Keyword(s):  
Discharge Current ◽  
Electrochemical Impedance ◽  
Salt Water ◽  
Corrosion Mechanism ◽  
Distilled Water ◽  
Discharge Performance ◽  
Al 6061 ◽  
Galvanostatic Discharge ◽  
Discharge Behavior ◽  
Discharge Potential

Electrolyte activated battery finds its important use during natural disaster emergencies, such as floods and typhoons. Nevertheless, high corrosion rate will deteriorate the discharge performance of the battery and it is influenced by the type of electrolyte and discharge current. In this study, the corrosion and discharge performance of a commercial Al 6061 aluminum alloy as an anode are investigated at different discharge currents (0.001, 0.01, and 1 mA) and in different electrolytes, namely salt water, urea, and distilled water. Scanning electron microscopy results show that electrode in salt water has the most serious corrosion, followed by that of in urea and in distilled water. These electrode-electrolyte combinations are further investigated with potentiodynamic polarization, galvanostatic discharge, and electrochemical impedance spectroscopy (EIS) to understand their discharge potential, discharge behavior, and corrosion mechanism. Among all combinations, aluminum in water is found to have the highest discharge performance with discharge potentials ranging from 716 to 744 mV, regardless of discharge current.

scholarly journals Silver Decorated Reduced Graphene Oxide as Electrocatalyst for Zinc–Air Batteries

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 462 ◽  
Author(s):  
Laksanaporn Poolnapol ◽  
Wathanyu Kao-ian ◽  
Anongnat Somwangthanaroj ◽  
Falko Mahlendorf ◽  
Mai Thanh Nguyen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Energy ◽  
Rotating Disk Electrode ◽  
High Energy Density ◽  
Air Cathode ◽  
Discharge Performance ◽  
Reduced Graphene ◽  
Air Battery ◽  
Zinc Air Batteries

Due to their low cost and very high energy density, zinc–air batteries (ZABs) exhibit high potential for various energy applications. The electrochemical performance of the air-cathode has a decisive impact on the discharge performance of ZABs because the sluggish oxygen reduction reaction (ORR) kinetics increase the overpotential of the air-cathode and hence the performance of ZABs. In this work, reduced graphene oxide decorated with silver nanoparticles (AgNP/rGO) is synthesized using simultaneous reduction of graphene oxide and silver ions. Different amounts of silver loading are examined for the synthesis of AgNP/rGO. The synthesized AgNP/rGO samples are analyzed using a rotating disk electrode in order to investigate ORR activity. Then, the synthesized AgNP/rGO electrocatalyst is applied on a tubular designed zinc–air battery in order to study the performance of the zinc–air battery. Results demonstrate that AgNP/rGO is an efficient and cost-effective ORR electrocatalyst for its practical application in ZABs.

scholarly journals Effect of Cross Rolling on the Corrosion Resistance of AZ31 Magnesium Alloy

2020 ◽  
Vol 71 (8) ◽  
pp. 176-182
Author(s):  
Zhiquan Huang ◽  
Jinchao Zou ◽  
Guowei Yang ◽  
Yanchun Zhu ◽  
Hongyu Lai ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Electrochemical Impedance ◽  
Corrosion Current ◽  
Charge Transfer Resistance ◽  
Az31 Magnesium Alloy ◽  
Constant Current ◽  
Transfer Resistance ◽  
Discharge Performance ◽  
Cross Rolling ◽  
Effective Contact

The effect of different rolling methods on the microstructure and corrosion behavior of AZ31 magnesium alloy in a 3.5% NaCl solution was studied via potentiodynamic polarization scanning, constant current discharge and electrochemical impedance spectroscopy. Results show that the corrosion current densities of cross rolling and unidirectional rolling are 8.60�10-3 and 4.68�10-2 A/cm2, respectively. Their difference is 5.4fold, the charge transfer resistance of cross rolling is large, the corrosion of one-way rolling is more serious than that of cross rolling, the discharge performance of cross rolling is more stable, and the anode polarization is small. After cross rolling, the grain size of the plate is relatively uniform and the corrosion products are non-adherent and less, so it is easy to fall off from its surface, which increases the effective contact between the electrolyte and the alloy surface and has more stable discharge performance.

scholarly journals Microstructure and Discharge Performance of Aluminum Al 6061 Alloy as Anode for Electrolyte Activated Battery

2020 ◽  
Vol 49 (12) ◽  
pp. 3189-3200
Author(s):  
Priyathashiny Pongali ◽  
Wai Yin Wong ◽  
Voi Lo Alvie Sin ◽  
Sammy Lap Ip Chan ◽  
Kean Long Lim
Keyword(s):  
Discharge Current ◽  
Electrochemical Impedance ◽  
Salt Water ◽  
Corrosion Mechanism ◽  
Distilled Water ◽  
Discharge Performance ◽  
Al 6061 ◽  
Galvanostatic Discharge ◽  
Discharge Behavior ◽  
Discharge Potential

Electrolyte activated battery finds its important use during natural disaster emergencies, such as floods and typhoons. Nevertheless, high corrosion rate will deteriorate the discharge performance of the battery and it is influenced by the type of electrolyte and discharge current. In this study, the corrosion and discharge performance of a commercial Al 6061 aluminum alloy as an anode are investigated at different discharge currents (0.001, 0.01, and 1 mA) and in different electrolytes, namely salt water, urea, and distilled water. Scanning electron microscopy results show that electrode in salt water has the most serious corrosion, followed by that of in urea and in distilled water. These electrode-electrolyte combinations are further investigated with potentiodynamic polarization, galvanostatic discharge, and electrochemical impedance spectroscopy (EIS) to understand their discharge potential, discharge behavior, and corrosion mechanism. Among all combinations, aluminum in water is found to have the highest discharge performance with discharge potentials ranging from 716 to 744 mV, regardless of discharge current.

A Bayesian View on the Hilbert Transform and the Kramers-Kronig Transform of Electrochemical Impedance Data: Probabilistic Estimates and Quality Scores

2020 ◽  
Author(s):  
Jiapeng Liu ◽  
Ting Hei Wan ◽  
Francesco Ciucci
Keyword(s):  
Power Generation ◽  
Electrochemical Impedance Spectroscopy ◽  
Hilbert Transform ◽  
Electrochemical Impedance ◽  
The Self ◽  
Impedance Data ◽  
The Hilbert Transform ◽  
Validation Tests ◽  
Self Consistency ◽  
Mathematical Relations

<p>Electrochemical impedance spectroscopy (EIS) is one of the most widely used experimental tools in electrochemistry and has applications ranging from energy storage and power generation to medicine. Considering the broad applicability of the EIS technique, it is critical to validate the EIS data against the Hilbert transform (HT) or, equivalently, the Kramers–Kronig relations. These mathematical relations allow one to assess the self-consistency of obtained spectra. However, the use of validation tests is still uncommon. In the present article, we aim at bridging this gap by reformulating the HT under a Bayesian framework. In particular, we developed the Bayesian Hilbert transform (BHT) method that interprets the HT probabilistic. Leveraging the BHT, we proposed several scores that provide quick metrics for the evaluation of the EIS data quality.<br></p>

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