Comparative Study of Surface State and Electrochemical Properties of Tife Hydrogen Storage Alloy as Well as TiFe2 Alloy by Xps and Polarization Curves Methods

1998 ◽  
pp. 353-358
Author(s):  
V. A. Lavrenko ◽  
V. Z. Mordkovich ◽  
V. A. Shvets ◽  
T. V. Khomko
Keyword(s):  
Comparative Study ◽  
Hydrogen Storage ◽  
Electrochemical Properties ◽  
Surface State ◽  
Hydrogen Storage Alloy ◽  
Polarization Curves

Preparation and Electrochemical Properties of Mg40Al60 Hydrogen Storage Alloy

2011 ◽  
Vol 347-353 ◽  
pp. 3232-3237
Author(s):  
Zhong Qiu Cao ◽  
Ting Wang ◽  
Ke Zhang ◽  
Hui Zhang
Keyword(s):  
Hydrogen Storage ◽  
Electrochemical Properties ◽  
Ball Milling ◽  
Milling Time ◽  
Electrochemical Impedance ◽  
Corrosion Current ◽  
Hydrogen Storage Alloy ◽  
Polarization Curves ◽  
Discharge Capacities ◽  
Ball Milling Time

Microstructural characteristics and electrochemical properties of Mg40Al60hydrogen storage alloy prepared by mechanical alloying (MA) method were studied by XRD, discharge capacities, polarization curves and electrochemical impedance spectroscopies(EIS). The intensities of XRD peaks become weak and XRD peaks have a broadening with the increment of ball milling time due to fine grain size and increased internal stress. The discharge capacities of the alloy increase before the alloyed powders were milled for 10h, but they decrease after the alloyed powders were milled for 10h with the increment of ball milling time. The discharge capacities are highest when the alloyed powders were milled for 10h. There are passive phenomena in polarization curves. The corrosion current densities increase with time at the beginning of ball milling and then decrease. The electrochemical impedance spectroscopies(EIS) are composed of a single capacitive loop and the electrode reaction is controlled by charge transfer at alloy/electrolyte interface.

Electrochemical properties of Ti2Ni hydrogen storage alloy

2017 ◽  
Vol 42 (2) ◽  
pp. 1420-1428 ◽  
Author(s):  
Bilel Hosni ◽  
Chokri Khaldi ◽  
Omar ElKedim ◽  
Nouredine Fenineche ◽  
Jilani Lamloumi
Keyword(s):  
Hydrogen Storage ◽  
Electrochemical Properties ◽  
Hydrogen Storage Alloy

scholarly journals Effect of the discharge rate on the electrochemical properties of LaY2Ni9 hydrogen storage alloy

2015 ◽  
Vol 631 ◽  
pp. 7-14 ◽  
Author(s):  
Yassine Ben Belgacem ◽  
Chokri Khaldi ◽  
Jilani Lamloumi ◽  
Hisasi Takenouti
Keyword(s):  
Hydrogen Storage ◽  
Electrochemical Properties ◽  
Discharge Rate ◽  
Hydrogen Storage Alloy

Cycling Stability Performance of La0.75Mg0.25Ni3.5Si0.10 Hydrogen Storage Alloy in Discharge–Charge System

2014 ◽  
Vol 13 (05n06) ◽  
pp. 1460003
Author(s):  
Zhaojiang Liu ◽  
Lei Huang ◽  
Qi Wan ◽  
Xu Li ◽  
Ma Guang ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Electrochemical Properties ◽  
Melting Furnace ◽  
Test System ◽  
Cycling Stability ◽  
Hydrogen Storage Alloy ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Stability Performance ◽  
Charge Discharge

La 0.75 Mg 0.25 Ni 3.5 Si 0.10 hydrogen storage alloy was prepared by vacuum induction melting furnace and subsequently heated treatment at 940°C for 8 h and cooled to room temperature in the oven. The electrochemical properties of La 0.75 Mg 0.25 Ni 3.5 Si 0.10 compound were measured by LAND CT2001A battery test system. The morphologies of the samples were characterized by scanning electron microscopy (SEM). The surface state of samples was analyzed by X-ray photoelectron spectroscopy (XPS). It was found that the charge–discharge rate plays the key impact on the cycling stability of the alloy. During the cycle test, the prepared La 0.75 Mg 0.25 Ni 3.5 Si 0.10 compound presented an excellent capacity retention at the charge–discharge of 1 C while the capacity of sample declined rapidly at 0.2 C. The excellent cycling stability performance of La 0.75 Mg 0.25 Ni 3.5 Si 0.10 electrode at 1 C could be attributed to the less powder and less oxidation of surface effective active elements. The pulverization inevitably leads to the separation of the part of the cracking alloy and the electrode, resulting in reduction of the effective active substance and increasing attenuation of the capacity per cycle. In addition, on the analysis of the different cut-off potential effects on the electrode, it was found that the La 0.75 Mg 0.25 Ni 3.5 Si 0.10 electrode shows good comprehensive electrochemical properties at 1 C cut-off 0.6–0.7 V. During charging, heavy overcharge will not be conducive to cycling stability performance during the charging test.

Microstructure and electrochemical properties of melt-spun Nd0.8Mg0.2(Ni0.8Co0.2)3.8 hydrogen storage alloy

2010 ◽  
Vol 28 (1) ◽  
pp. 100-103 ◽  
Author(s):  
Chongchao PAN ◽  
Wupeng CAI ◽  
Javed Iqbal ◽  
Zhen WANG ◽  
Chaoqing GENG ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Electrochemical Properties ◽  
Hydrogen Storage Alloy ◽  
Melt Spun
Sign in / Sign up

Export Citation Format

Share Document