“Enhancing electrochemical performance of LaNi5 anodes using MXene as a multifunctional additive for Ni-MH batteries”
Malik S. Zhumadil K. Avchukir K. Skakov M. Miniyazov A. Mukhamedova N. Zhanbolatova G. Malchik F.
1 November 2025Elsevier B.V.
Journal of Electroanalytical Chemistry
2025#996
Nickel-metal hydride (Ni-MH) batteries remain vital for sustainable energy technologies due to their safety, reliability, and environmental friendliness. However, LaNi5-based hydrogen storage alloy anodes are hindered by degradation and sluggish hydrogen kinetics. This study presents a novel approach to improving the performance of Ni-MH batteries through the development of binder-free hybrid anodes composed of LaNi5 intermetallic alloy and Ti3C2Tx (MXene). The LaNi5 particles were synthesized via a two-step oxide reduction route, optimized for phase purity and nanostructured morphology. Freestanding LaNi5/MXene composite electrodes with varying mass ratios were prepared and compared against conventional PTFE-based LaNi5 electrodes. Structural, morphological, and electrochemical analyses revealed that the MXene matrix functions as a conductive scaffold and mechanically robust binder, significantly enhancing charge transfer, electrolyte accessibility, and capacity utilization. The optimized hybrid electrode (80:20) exhibited a high specific capacity of 225 mAh/g, good rate capability up to 10C, and enhanced cycling stability. Impedance spectroscopy and kinetic analysis further confirmed reduced charge transfer resistance and improved exchange current density relative to PTFE-based analogues. These results demonstrate the potential of MXene-based architectures to overcome long-standing limitations of hydrogen storage alloy anodes in alkaline batteries, offering a promising direction for safer, high-performance aqueous energy storage systems.
Binderless electrode , Hybrid electrode , LaNi5 , MXene , Ni-MH batteries
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Department of Chemistry and Chemical Technology, al-Farabi Kazakh National University, 71 al-Farabi Ave., Almaty, 050040, Kazakhstan
Center of Physical-Chemical Methods of Research and Analysis, al-Farabi Kazakh National University, 96А Tole bi str., Almaty, 050040, Kazakhstan
RSE “National Nuclear Center of the Republic of Kazakhstan”, 2B Beibyt atom st., Kurchatov, 180010, Kazakhstan
Branch “Institute of Atomic Energy” of the RSE “National Nuclear Center of the Republic of Kazakhstan”, 2B Beibyt atom st., Kurchatov, 180010, Kazakhstan
Department of Chemistry and Chemical Technology
Center of Physical-Chemical Methods of Research and Analysis
RSE “National Nuclear Center of the Republic of Kazakhstan”
Branch “Institute of Atomic Energy” of the RSE “National Nuclear Center of the Republic of Kazakhstan”
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