Coexistence of Sn and FeSn2 nanoparticles dispersed in glass-ceramics and their electrochemical performance as sodium-ion battery anode
Source abstract
Abstract
New glassy samples with 55SnO-15Na 2O-yFe 2O 3-(30–y)SiO 2 compositions (y = 0–9) were synthesized by the mechanochemical milling method to explore new sodium-ion battery (SIB) anodes with the coexistence of β-Sn and FeSn 2 nanoparticles. It was clarified from X-ray diffraction analysis and transmission electron microscopy observations that β-Sn metal and FeSn 2 intermetallic compound with the size of ∼100 nm were formed in the glass powders heat-treated at 450 °C for 3–10 h in 10%H 2/90%N 2 reducing atmosphere. It was suggested that the growth (coarsening) of β-Sn is largely depressed due to the formation of FeSn 2, and β-Sn, FeSn 2, and the Na 2O-SiO 2 -based amorphous phase are dispersed homogeneously in the glass-ceramics. It was clarified that new glass-ceramics are working as anode materials for SIBs, for example, showing the initial capacity of 350 mAh/g in the sample with y = 6.75 and the reversible alloying behavior between β-Sn/FeSn 2 and Na + ions. The addition of Fe 2O 3 and the coexistence of FeSn 2 with β-Sn contribute to the stable operation of the sodium half-cell.
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Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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