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

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.

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Effect of Na2SO4 on the Performance of Mg-Air Battery

Materials Science Forum ◽

10.4028/www.scientific.net/msf.847.46 ◽

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.

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Delayed Discharge Bridging Two Sputtering Modes from Modulated Pulsed Power Magnetron Sputtering (MPPMS) to Deep Oscillation Magnetron Sputtering (DOMS)

Plasma ◽

10.3390/plasma4020016 ◽

2021 ◽

Vol 4 (2) ◽

pp. 239-251

Author(s):

Masaomi Sanekata ◽

Hiroshi Nishida ◽

Tatsuya Watabe ◽

Yuki Nakagomi ◽

Yoshihiro Hirai ◽

...

Keyword(s):

Magnetron Sputtering ◽

Discharge Current ◽

Electrical Breakdown ◽

Pulsed Power ◽

Current Waveform ◽

Delayed Discharge ◽

Plot Analysis ◽

Delay Times ◽

Discharge Behavior ◽

Delayed Discharges

Delayed discharges due to electrical breakdown are observed in modulated pulsed pow er magnetron sputtering (MPPMS) plasma of titanium. The delayed discharge, which is remarkable with decreasing argon gas pressure, transforms the discharge current waveform from a standard modulated pulsed discharge current waveform to a comb-like discharge current waveform consisting of several pulses with high power. In addition, the delay times, consisting of statistical times and formative times in the delayed MPPMS discharges, are experimentally measured with the help of Laue plot analysis. The pressure dependence of delay times observed indicates that the delayed discharge behavior matches the breakdown characteristics well. In the present study, the delayed discharge dynamics of the comb-like discharge current waveform, which can be the origin of deep oscillation magnetron sputtering, are investigated based on measurement of the delay times and the characteristics of discharge current waveforms.

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Effect of CO2 on Anti-Corrosion Property of a Polyurea Coating Modified with Organosilicone

Materials Science Forum ◽

10.4028/www.scientific.net/msf.789.466 ◽

2014 ◽

Vol 789 ◽

pp. 466-470

Author(s):

Qing Hao Shi ◽

Bing Ying Wang ◽

Bin Zhao

Keyword(s):

High Temperature ◽

Partial Pressure ◽

Composite Coating ◽

Corrosion Test ◽

Electrochemical Impedance ◽

Failure Process ◽

Corrosion Property ◽

Corrosion Mechanism ◽

Partial Pressures ◽

High Temperature High Pressure

The corrosion mechanism of organic silicon modified polyurea composite coating under different CO2 partial pressures was studied using high-temperature autoclave, combined with scanning electron microscopy (SEM), adhesion tests and electrochemical impedance spectroscopy (EIS) technology. The experimental results showed that: there was no corrosion product formed on the surface of coating sample after high-temperature high-pressure corrosion test, and with the increasing of CO2 partial pressure, the coating adhesion and impedance values decline increases. Moreover CO2 partial pressure increases accelerated the failure process of polyurea composite coating system.

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Construction of a stable lithium sulfide membrane to greatly confine polysulfides for high performance lithium–sulfur batteries

Journal of Materials Chemistry A ◽

10.1039/c8ta00098k ◽

2018 ◽

Vol 6 (18) ◽

pp. 8655-8661 ◽

Cited By ~ 6

Author(s):

Chao Wu ◽

Chunxian Guo ◽

JingGao Wu ◽

Wei Ai ◽

Ting Yu ◽

...

Keyword(s):

Discharge Current ◽

High Performance ◽

Material Surface ◽

Lithium Sulfur Battery ◽

Galvanostatic Discharge ◽

Lithium Sulfide ◽

Lithium Sulfur Batteries ◽

Sulfur Battery ◽

Lithium Sulfur

A stable lithium sulfide membrane is constructedin situto wrap the mixed sulfur/C material surface of a lithium–sulfur battery (LSB) by delicately tuning the galvanostatic discharge current.

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Effect of nickel content in the corrosion process of TiC/Cu-Ni composites immersed in synthetic seawater

MRS Advances ◽

10.1557/adv.2019.492 ◽

2019 ◽

Vol 4 (63) ◽

pp. 3475-3484

Author(s):

Miguel A. Téllez-Villaseñor ◽

Carlos A. León Patino ◽

Ricardo Galván Martínez ◽

Ena A. Aguilar Reyes

Keyword(s):

Corrosion Rate ◽

Electrochemical Impedance ◽

Corrosion Behaviour ◽

Nickel Content ◽

Corrosion Mechanism ◽

Composite Surface ◽

Synthetic Seawater ◽

Ni Content ◽

The Matrix ◽

Static Conditions

ABSTRACTThe work presents an electrochemical study of the corrosion behaviour of two TiC/Cu-Ni metal matrix composites with a content of 10 and 20 wt.% Ni immersed in synthetic seawater. The composites were synthesized by a capillary infiltration technique, obtaining dense materials TiC/Cu-10Ni and TiC/Cu-20 Ni with a residual porosity of 1.8 and 1.7%, respectively. The corrosion rate (CR) was evaluated from the techniques of polarization curves (PC), linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS). Electrochemical measurements were carried out under static conditions, ambient temperature and atmospheric pressure at 24 hours exposure in the electrolytic medium. The corrosion rate is affected by the Ni content in the matrix, with less corrosion in the composite with a higher Ni content. The higher content of Ni in the Cu-Ni alloy provides higher passivation and stability to the corrosion products film that are absorbed on the composite surface. Microscopic examination (SEM) showed a characteristic morphology of a corrosion mechanism of the localized type (pits and crevices) generated by a differential aeration, where the TiC/Cu-10Ni composite showed greater degradation.

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Discharge performance and dynamic behavior of refuellable zinc-air battery

Scientific Data ◽

10.1038/s41597-019-0178-3 ◽

2019 ◽

Vol 6 (1) ◽

Cited By ~ 9

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.

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On the corrosion mechanism of Mg investigated by electrochemical impedance spectroscopy

Electrochimica Acta ◽

10.1016/j.electacta.2019.03.080 ◽

2019 ◽

Vol 306 ◽

pp. 61-70 ◽

Cited By ~ 36

Author(s):

Maurilio Pereira Gomes ◽

Isolda Costa ◽

Nadine Pébère ◽

Jesualdo Luiz Rossi ◽

Bernard Tribollet ◽

...

Keyword(s):

Electrochemical Impedance Spectroscopy ◽

Impedance Spectroscopy ◽

Electrochemical Impedance ◽

Corrosion Mechanism

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Study on the Concrete in Chloride Environment Based on Electrochemical Impedance Spectroscopy

International Journal of Pattern Recognition and Artificial Intelligence ◽

10.1142/s021800142059017x ◽

2019 ◽

Vol 34 (06) ◽

pp. 2059017

Author(s):

Fengjiao Jiang ◽

Jinxin Gong ◽

Jichao Zhu ◽

Huan Wang

Keyword(s):

Electrochemical Impedance Spectroscopy ◽

Electric Double Layer ◽

Electrochemical Impedance ◽

Pore Solution ◽

Salt Water ◽

Chloride Ions ◽

Double Layer Capacitance ◽

Cement Ratio ◽

Water Cement Ratio ◽

Electric Double Layer Capacitance

In this paper, the effect of water-cement ratio and chloride ions on the concrete meso-structure was studied. Three kinds of concrete cubes with different water-cement ratios were immersed in fresh water and salt water, respectively. Then, the Electrochemical Impedance Spectroscopy (EIS) analysis of various test cubes were carried out by using electrochemical workstation. The results show that the salt water can improve electric double layer capacitance in the test cubes with the same water-cement ratio, but it can reduce some other parameters such as resistance of pore solution, resistance to transfer the hydrated electron, coefficient of diffusion impedance of concreter, which shows that the chloride ions diffused into the concrete in salt water and increase the ionic concentration in pore solution and C-S-H gel. However, the phase angle index is constant whether in fresh water or salt water, which shows chloride ions cannot affect the concrete meso-structure even though they can improve the ion concentration of pore structure. For the concrete test cubes which has different water-cement ratio in salt water, with the reduction of water-cement ratio, the electric double-layer capacitance of concrete remains unchanged, which indicates when the water-cement ratio becomes smaller, the porosity becomes lower, and the internal structure of concrete becomes denser.

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Electrochemical Behavior of Conventional and Rheo-High-Pressure Die Cast Low Silicon Aluminum Alloys in NaCl Solutions

CORROSION ◽

10.5006/3254 ◽

2019 ◽

Vol 75 (11) ◽

pp. 1339-1353

Author(s):

Maryam Eslami ◽

Flavio Deflorian ◽

Caterina Zanella

Keyword(s):

High Pressure ◽

Electrochemical Impedance Spectroscopy ◽

Impedance Spectroscopy ◽

Electrochemical Behavior ◽

Anodic Polarization ◽

Electrochemical Impedance ◽

Casting Process ◽

Corrosion Mechanism ◽

Die Cast ◽

Polarization Test

The electrochemical behavior of a low silicon aluminum alloy cast by the conventional and rheo-high-pressure die cast processes is evaluated using polarization test and electrochemical impedance spectroscopy in 0.01 M, 0.05 M, 0.1 M, and 0.6 M sodium chloride solutions. Compared to the conventional high-pressure die cast process, rheocasting introduces some alterations in the microstructure including the presence of aluminum grains with different sizes, formed at different solidification stages. According to the results of the anodic polarization test, conventional cast and rheocast samples show similar breakdown potentials. However, the rheocast samples present enhanced oxygen reduction kinetics compared to the conventional cast sample. Based on scanning electron microscopy examinations, localized microgalvanic corrosion is the main corrosion mechanism for both alloys and it initiates at the interface of aluminum with iron-rich intermetallic particles which are located inside the eutectic regions. The corrosion further develops into the eutectic area. Although the rate of the cathodic reaction can be influenced by the semisolid microstructure, according to the results of anodic polarization and electrochemical impedance spectroscopy tests, the corrosion behavior is not meaningfully affected by the casting process.

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