Improving hydrogen-induced crystallization and electrochemical hydrogen storage properties of MgNi amorphous alloy with CoB addition
Source abstract
Abstract
Amorphous MgNi-based alloy demonstrates the potential to be a candidate for Ni-MH battery anode materials due to its low cost and high capacity. However, the poor cyclic performance limits its practical application, which was predominantly attributed to the electrochemical oxidization of Mg in alkaline electrolytes. In this work, the amorphous CoB was added to successfully enhance the structural stability and cyclic performance of the amorphous MgNi alloy electrode. For the milled MgNi mixture containing 5 wt% CoB, the capacity maintains 174.8 ± 7.6 mAh/g after 30 cycles, increasing ∼114.6 mAh/g than pure MgNi. DSC and TG results indicate that the CoB addition can greatly increase the crystallization temperature of amorphous MgNi, implying higher resistance to hydrogen-induced crystallization in the charge/discharge cycles of MgNi amorphous alloy electrodes. As a result, the amorphous composite structure could effectively improve the electrochemical performances of amorphous MgNi alloys.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Hydrogen Storage and Materials · Ammonia Synthesis and Nitrogen Reduction · Magnesium Alloys: Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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