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Article Abstract
To address the high cost of cobalt in rare-earth hydrogen storage alloys, this study developed cost-effective low-cobalt and cobalt-free AB-type alloys. The results demonstrate that all synthesized alloys displayed a single-phase LaNi structure possessing a homogeneous elemental distribution. Low-cobalt (La, Ce) (Ni, Co, Mn, Al) alloy 4SC and cobalt-free (La, Ce) (Ni, Mn, Al) alloy 7D exhibited similarly excellent electrochemical performance, including high discharge capacity, long cycle life, and superior high-rate discharge () capability. In addition, the kinetic test results show that the exchange current densities of these two alloys were quite similar, measuring 302.97 mA g and 317.70 mA g, respectively. However, the hydrogen diffusion coefficient of 7D was significantly higher than that of 4SC, reaching 9.45 × 10 cm s, while that of 4SC was only 5.88 × 10 cm/s. This work establishes a theoretical foundation for industrial-scale and cost-effective AB-type hydrogen storage alloys, offering significant commercial potential.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12299017 | PMC |
| http://dx.doi.org/10.3390/ma18143317 | DOI Listing |
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