Phase structure and electrochemical properties of La0.7Ce0.3Ni3.75Mn0.35Al0.15Cu0.75−x(Fe0.43B0.57)x hydrogen storage alloys

Effects of Cu Substitution for Sn on the Electrochemical Performance of La0.7Mg0.3Al0.3Mn0.4Sn0.5−xCuxNi3.8 (x = 0–0.5) Alloys for Ni-MH Batteries

“…These results show that increase of Cu content effectively improves the cyclic stability of the electrode alloys. As reported by Liu et al [14], the alloy particle pulverization is caused by lattice mismatch stresses during charge/discharge cycles. This may be one of the explanations for cyclic stability enhancement of the Cu alloys.…”

Microstructures and electrochemical hydrogen storage characteristics of La0.7Ce0.3Ni4.2Mn0.9−xCu0.37(Fe0.43B0.57)x (x = 0–0.20) alloys

“…It is clear that the I 0 first increases from 123.3 mA g À1 (x ¼ 0) to 193.4 mA g À1 (x ¼ 0.05), and then decreases to 149.8 mA g À1 (x ¼ 0.20). It is reported that the formation of the La 3 Ni 13 B 2 secondary phase in AB 5 alloys improves the catalytic activity of the alloys [20]. As mentioned above, the secondary phase La 3 Ni 13 B 2 increases with increasing x value, which is of benefit to improve the electrocatalytic activity of the surface of alloy electrode and the charge-transfer reaction.…”

“…The linear polarization curves were performed on a PARSTAT 2273 Advanced Potentiostat/Galvanostat station (using linear polarization in the PowerCORR software) by scanning the electrode potential at the rate of 0.1 mV s À1 from À5 to 5 mV (versus open circuit potential) at 50% depth of discharge (DOD) at 298 K. The potential step measurements were tested on the same instrument (using potentiostatic in the PowerCORR software) at 100% charge state. A þ500 mV potential was applied and the discharge time was 3600 s. 20 30…”

Ratiometric mechanoluminescence in single Pr3+‐activated LiGa5O8

“…Following irradiation with the 254 nm UV light, the colour of the sample appeared green in the photographs of PersL taken at various intervals (Figures S4–S5). In addition to the shallow trap, there was another trap state at a deeper positions (trap 3) in Li 1‐x Ga 5 O 8 :xPr 3+ , whose trap depth is given by Urbach's empirical formula [30]: where E T is the defect depth with a unit of eV , and T m is the peak temperature of the TL curve in K . The calculated peak and trap depth values are also listed (Table S2).…”