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Structural evolution during calcination and sintering of a (La0.6Sr0.4)(0.99)CoO3-delta nanofiber prepared by electrospinning

机译:通过静电纺丝制备的(La0.6SR0.4)(0.99)CoO3-Delta纳米纤维煅烧和烧结过程中的结构演变

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摘要

Design of three-dimensional metal oxide nanofibers by electrospinning is being widely explored. However, the impacts of calcination and sintering on the resulting morphology remain unknown. For the first time, (La0.6Sr0.4)(0.99)CoO3-delta (LSC) nanofiber, which is among the most promising electrode materials for solid oxide fuel cells, was synthesized by sol-gel electrospinning. By elevating the temperature in oxygen using in situ transmission electron microscopy, we discovered the structural transitions from nanofibers to nanotubes and then to nano-pearl strings. This facile and up-scalable method can be widely applied to design metal oxide one-dimensional nanomaterials with precise control in both geometry (nanofiber, nanotube and nano-pearl string) and surface area (by varying grain size).
机译:静电纺丝三维金属氧化物纳米纤维的设计被广泛探索。 然而,煅烧和烧结对所产生的形态的影响仍然是未知的。 首次,通过溶胶 - 凝胶静电纺丝合成,(La0.6SR0.4)(0.99)CoO3-Delta(LSC)纳米纤维,其是用于固体氧化物燃料电池的最有前途的电极材料之一。 通过原位透射电子显微镜升高氧气中的温度,我们发现从纳米纤维到纳米管的结构过渡,然后发现纳米珠板。 该容易和可升级的方法可广泛应用于设计金属氧化物一维纳米材料,在几何形状(纳米纤维,纳米管和纳米珍珠串)和表面积(通过不同的晶粒尺寸)中具有精确控制。

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