Crystallization investigation of BaTiO 3 coating layer on Ni nanoparticles
Crystallization investigation of BaTiO 3 coating layer on Ni nanoparticles
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DOI：
10.1049/mna2.12048
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发表时间：
2021-01
影响因子：
1.3
通讯作者：
Jing Qin;Y. Hao;Limin Guo;K. Bi
中科院分区：
文献类型：
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作者：
Jing Qin;Y. Hao;Limin Guo;K. Bi
长期以来，贱金属电极(BME)氧化物涂层的结晶一直面临挑战。本文采用溶胶-凝胶法在镍纳米粒子表面包覆多晶BaTiO3(BT)。通过调整反应条件，通过透射电子显微镜观察，获得了连续、均匀的BT涂层。粉末X-射线衍射分析表明，去离子水含量是影响BT层结晶的关键因素，而去离子水含量可以改变反应溶剂的pH值。随着去离子水含量的增加，Bt层的结晶度增加，大大提高了Ni纳米粒子的抗氧化性能。当去离子水的加入量增加到20wt%时，出现了Ni3C杂质，镍纳米粒子的性能变差。结果表明，最佳去离子水含量为16wt%，以获得最佳性能的BT包覆Ni(Ni@BT)纳米粒子。
The crystallization of oxide coating layer on base metal electrode (BME) has facing challenges for a long time. In this paper, a sol‐gel method was used to coat nickel (Ni) nanoparticles with polycrystalline BaTiO3 (BT). By adjusting the reaction condition, continuous and homogeneous BT coating layer was obtained based on the transmission electron microscopy (TEM) observation. Powder X‐ray diffraction (XRD) of the coated sample indicated that deionized water content, which can change the pH value of the reaction solvent, is the key factor to influence the crystallization of the BT layer. With the increase of the deionized water, the crystallinity of the BT layer increased, which greatly enhanced the anti‐oxidation properties of the Ni nanoparticles. When the amount of deionized water increased to 20 wt%, Ni3C impurity appeared and the properties of the Ni nanoparticles deteriorated. As a result, an optimized deionized water content of 16 wt% is adopted for the best performance of the BT coated Ni (Ni@BT) nanoparticles.