Structural and Electrochemical Hydrogenation Characteristics of Y-Containing RNi3-xMnx (R = Y and lanthanides; x = 0…2) Alloys

Keywords

nickel-metal hydride batteries, intermetallic compounds, hydrogen storage, electrochemical properties

Abstract

Y-containing RNi_3-xMnₓ intermetallic compounds were synthesized for Ni-MH batteries negative electrode applications. X-ray powder diffraction confirmed LaY₂Ni₉-type structure. Mn substitution enhanced initial discharge capacities but reduced cycling stability. Mn-free alloys showed superior cycling stability and high-rate performance. Results reveal a trade-off between capacity enhancement and cyclic stability, providing insights for optimizing Y-containing compounds for energy storage.

References

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