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Efficient alkaline seawater oxidation by a three-dimensional core-shell dendritic NiCo@NiFe layered double hydroxide electrode

https://doi.org/10.1016/j.mtphys.2022.100841

Zhang, Fanghao ; Liu, Yifei ; Wu, Libo ; Ning, Minghui ; Song, Shaowei ; Xiao, Xin ; Hadjiev, Viktor G. ; Fan, Donglei Emma ; Wang, Dezhi ; Yu, Luo ; et al ( October 2022 , Materials Today Physics)

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Improved Thermoelectric Performance of Eco‐Friendly β‐FeSi 2 –SiGe Nanocomposite via Synergistic Hierarchical Structuring, Phase Percolation, and Selective Doping

https://doi.org/10.1002/adfm.201903157

Liu, Naiming ; Rezaei, S. Emad ; Jensen, Wade Aaron ; Song, Shaowei ; Ren, Zhifeng ; Esfarjani, Keivan ; Zebarjadi, Mona ; Floro, Jerrold Anthony ( July 2019 , Advanced Functional Materials)

Abstract
A β‐FeSi₂–SiGe nanocomposite is synthesized via a react/transform spark plasma sintering technique, in which eutectoid phase transformation, Ge alloying, selective doping, and sintering are completed in a single process, resulting in a greatly reduced process time and thermal budget. Hierarchical structuring of the SiGe secondary phase to achieve coexistence of a percolated network with isolated nanoscale inclusions effectively decouples the thermal and electrical transport. Combined with selective doping that reduces conduction band offsets, the percolation strategy produces overall electron mobilities 30 times higher than those of similar materials produced using typical powder‐processing routes. As a result, a maximum thermoelectric figure of meritZTof ≈0.7 at 700 °C is achieved in the β‐FeSi₂–SiGe nanocomposite.

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