Effect of Gd content on the discharge and electrochemical behaviors of the magnesium alloy AZ31 as an anode for Mg-air battery

Li, Quan; Xiong, Wei; Yu, Sirong; Liu, Ying; Li, Jing; Liu, Lin; Bi, Xiaojian; Zhu, Guang; Liu, Enyang; Zhao, Yan; Wang, Bingying

doi:10.1007/s10853-021-06135-2

Cited by 19 publications

(4 citation statements)

References 48 publications

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“…With the increasing applications in automotive structural components [14] and medical fields [15], the magnesium alloys inherent traits have appeared. These include chemical activity [16][17][18], low electrode potential [19][20][21], and limited corrosion resistance [22]. Among various magnesium alloys, Mg-Al-RE system alloys [23][24][25] stand out owing to better performance than those of the conventional magnesium alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of T4 treatment on the corrosion resistance of Mg-4Al-6Er-0.3Mn alloy

Liang,

Ma,

Qin

et al. 2024

Mater. Res. Express

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The Mg-Al alloys exhibit poor corrosion resistance when they exposed to Cl- attack. To solve this problem, Erbium (Er) and Manganese (Mn) are added to the Mg-4Al alloy and the Mg-4Al-6Er-0.3Mn is T4 treated to enhance the corrosion resistance of the alloy. Then the corrosion behaviors of the as-extruded alloy and the T4 alloy are investigated in this paper. It is found that the effective cathode Mg17Al12 is significantly reduced in the alloy due to the precipitation of Mg17Al12 being suppressed by Al2Er and the dissolution of the Mg17Al12 in the alloy. It is observed that the corrosion products transform from needle-like to tetrahedral-shaped corrosion products during the transformation process, which leads to severe pit corrosion. The results show that the T4 treatment can delay the transformation of the morphologies of the corrosion products, thereby improved the alloy corrosion resistance during the early stages of corrosion.

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Section: Introductionmentioning

confidence: 99%

Effect of T4 treatment on the corrosion resistance of Mg-4Al-6Er-0.3Mn alloy

Liang,

Ma,

Qin

et al. 2024

Mater. Res. Express

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“…These have encouraged many researchers to find new redox chemistries for batteries that have high energy density, safety, and low cost. Metal–air batteries (MABs) are one of the promising systems and have been investigated tremendously due to their very high theoretical energy densities, exceeding those of LIBs. − In addition, MABs can be operated using aqueous electrolytes, sustainable and abundant raw materials, that make the system intrinsically cost low, highly safe, and environmental benign. − Among the various MAB systems, seawater batteries consisting of metal anode, air cathode, and seawater electrolyte have drawn great attention because of their good electrochemical performance and the sufficiently available of seawater on earth with a relatively homogeneous geographic distribution. − One of the main obstacles in MABs is the sluggish oxygen reduction reaction (ORR) in the three-phase reaction zone of the air cathode that requires a highly active electrocatalyst hosted in a highly porous material to overcome the air diffusion resistance. , Noble-metal-based electrocatalysts are considered the benchmark electrocatalyst for the ORR, but their practical applications are hindered by their scarcity and expensive cost . Therefore, it is urgent to explore new sorts of highly efficient, stable, and low-cost ORR electrocatalysts replacing the noble-metal-based ones .…”

Section: Introductionmentioning

confidence: 99%

“… 5 − 8 Among the various MAB systems, seawater batteries consisting of metal anode, air cathode, and seawater electrolyte have drawn great attention because of their good electrochemical performance and the sufficiently available of seawater on earth with a relatively homogeneous geographic distribution. 9 − 11 One of the main obstacles in MABs is the sluggish oxygen reduction reaction (ORR) in the three-phase reaction zone of the air cathode that requires a highly active electrocatalyst hosted in a highly porous material to overcome the air diffusion resistance. 12 , 13 Noble-metal-based electrocatalysts are considered the benchmark electrocatalyst for the ORR, but their practical applications are hindered by their scarcity and expensive cost.…”

Section: Introductionmentioning

confidence: 99%

Controlling N-Doping Nature at Carbon Aerogels from Biomass for Enhanced Oxygen Reduction in Seawater Batteries

Susanto,

Nurtono,

Widiyastuti

et al. 2024

ACS Omega

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Pyridinic N-type doped at carbon has been known to have better electrocatalytic activity toward the oxygen reduction reaction (ORR) than the others. Herein, we proposed to prepare pyridinic N doped at carbon aerogels (CaA) derived from biomass, i.e., coir fiber (CF) and palm empty fruit bunches (PEFBs), by adjusting the pyrolysis temperature during carbonization of the biomass-based-cellulose aerogels. The cellulose aerogels were prepared by the ammonia−urea system as the cellulose solvent, in which ammonia also acted as a N source for doping and urea as the cellulose cross-linker. The as-prepared cellulose aerogels were directly pyrolyzed to produce N-doped CaA. It was found that the type of N doping is dominated by pyrrolic N at pyrolysis temperature of 600 °C, pyridinic N at 700 °C, and graphitic N at 800 °C. The pyridinic N exhibited better performance as an electrocatalyst for the ORR than pyrrolic N and graphitic N. The ORR using pyridinic N follows the four-electron pathway, which quantitatively implies a more electrochemically stable process. When used as a cathode for the Mg−air battery using a 3.5% NaCl electrolyte, the pyridinic N CaA exhibited excellent performance by giving a cell voltage of approximately 1.1 V and delivered a high discharge capacity of 411.64 mA h g −1 for CF and 492.64 mA h g −1 for PEFB corresponding to an energy density of 464.23 and 529.49 mW h g −1 , respectively.

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“…Previous studies have shown that the addition of appropriate amouts of alloying elements to magnesium can inhibit the hydrogen evolution selfdischarge of magnesium and change its corrosion behavior, thereby improving the anode performance of magnesium alloy. [10][11][12][13][14][15][16][17][18][19] At present, common magnesium alloy anodes for seawater-activated batteries include AZ31, AP65 and Mg-Hg-Ga alloys, 1,2,11,12 etc. Due to the dissolution-deposition mechanism, Hg and Ga can effectively strip the oxide film on the surface of magnesium alloy, negatively shift the anode discharge potential of magnesium alloy.…”

mentioning

confidence: 99%

Effects of Deformation Microstructures on the Electrochemical Properties of Mg-Hg-Ga Alloy Anode

Yang,

Wang,

Wang

et al. 2024

J. Electrochem. Soc.

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Mg-Hg-Ga alloy is one of the anode materials for seawater-activated batteries. Here, Mg-3.0 wt%Hg-3.0 wt%Ga alloys were prepared by extrusion and rolling and the microstructure of the Mg-3.0 wt%Hg-3.0 wt%Ga alloy after plastic deformation was studied. The effects of deformation microstructures on the discharge properties and corrosion behavior of the alloys were investigated by galvanostatic discharge, potentiodynamic polarization, electrochemical impedance spectra experiments, and Mg/AgCl battery test. The results show that the microstructure of the extruded alloy is uniform, and the corrosion activity and discharge activity of the extruded alloy are relatively weak. Hot rolling deformation refines the grains and promotes the precipitation of the Mg5Ga2 phase distribute more dispersively, which results in faster and more uniform activation of the alloy, thus improving the corrosion activity and discharge activity of the Mg-3.0 wt%Hg-3.0 wt%Ga alloy. The results of galvanostatic discharge in half battery and Mg/AgCl battery discharge tests show that rolling deformation improves the discharge properties of the alloy, and the alloy with 78% rolling reduction has the best discharge performance.

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Effect of Gd content on the discharge and electrochemical behaviors of the magnesium alloy AZ31 as an anode for Mg-air battery

Cited by 19 publications

References 48 publications

Effect of T4 treatment on the corrosion resistance of Mg-4Al-6Er-0.3Mn alloy

Effect of T4 treatment on the corrosion resistance of Mg-4Al-6Er-0.3Mn alloy

Controlling N-Doping Nature at Carbon Aerogels from Biomass for Enhanced Oxygen Reduction in Seawater Batteries

Effects of Deformation Microstructures on the Electrochemical Properties of Mg-Hg-Ga Alloy Anode

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