%0 Journal Article
%T 静电纺丝法制备La<sub>0.375</sub>Sm<sub>0.125</sub>Sr<sub>0.5</sub>CoO<sub>3-</sub><i><sub>δ</sub></i>阴极及其性能研究<br>Study on the Preparation and Performance of La<sub>0.375</sub>Sm<sub>0.125</sub>Sr<sub>0.5</sub>CoO<sub>3-</sub><i><sub>δ</sub></i> Cathodes by Electrostatic Spinning Method
%A 王博
%A 刘雨
%A 王梦佳
%A 陈静
%J Journal of Advances in Physical Chemistry
%P 141-150
%@ 2168-6130
%D 2024
%I Hans Publishing
%R 10.12677/japc.2024.132017
%X 优化固体氧化物燃料电池(SOFC)的电极微观结构、对电极材料进行掺杂取代是提高阴极催化活性的常用手段。本文使用镧元素对传统Sm<sub>0.</sub><sub>5</sub>Sr<sub>0.5</sub>CoO<sub>3-</sub><i><sub>δ</sub></i> (SSC)阴极进行部分取代并通过静电纺丝法制备了La<sub>0.375</sub>Sm<sub>0.125</sub>Sr<sub>0.5</sub>CoO<sub>3-</sub><i><sub>δ</sub></i> (LSSC)纤维阴极，研究了前驱体溶液中PVB浓度对纤维物相结构和微观形貌的影响，测试了LSSC对称电池在550℃~750℃间的交流阻抗和反应级数。结果显示，当PVP为9 wt.%时能够制得直径约200 nm、粗细均匀且长度较长的LSSC纤维，在进一步制备成阴极后也基本保留了纤维结构，这有利于氧气向电极内部扩散；LSSC对称电池在700℃时的极化电阻仅0.06 Ω·cm<sup>2</sup>，性能优异。研究表明，LSSC纤维阴极是一种有潜力的中温SOFC阴极材料。<br />
It is common to optimize the electrode microstructure of solid oxide fuel cells (SOFCs) and to dope the electrode materials with other elements to improve the catalytic activity of the cathode. In this paper, La<sub>0.375</sub>Sm<sub>0.125</sub>Sr<sub>0.5</sub>CoO<sub>3-</sub><i><sub>δ</sub></i> (LSSC) fiber cathodes were prepared using lanthanum to partially replace the conventional Sm<sub>0.5</sub>Sr<sub>0.5</sub>CoO<sub>3-</sub><i><sub>δ</sub></i> (SSC) cathodes and through the electrostatic spinning method. The effects of PVB concentration in the precursor solution on the physical phase structure and microscopic morphology of the fibers were investigated, and the polarization impedance and reaction level of the LSSC fiber cathode were tested between 550？C and 750？C. The results show that LSSC fibers with a diameter of about 200 nm, uniform thickness and long length can be produced when the PVP is 9 wt.%. The fiber structure of LSSC fibers is also basically retained when they are further prepared as cathodes, which is beneficial for the diffusion of oxygen into the electrodes; moreover, the polarization resistance of LSSC symmetric cells is only 0.06 Ω·cm<sup>2</sup> at 700？C, which is an excellent performance. The study shows that the LSSC fiber cathode is a potential cathode material for medium-temperature SOFC.
%K La<sub>0.375</sub>Sm<sub>0.125</sub>Sr<sub>0.5</sub>CoO<sub>3-</sub><i><sub>δ</sub></i>，La掺杂，静电纺丝法，固体氧化物燃料电池，纳米纤维<br>La<sub>0.375</sub>Sm<sub>0.5</sub>Sr<sub>0.5</sub>CoO<sub>3-</sub><i><sub>δ</sub></i>
%K La-Doped
%K Electrostatic Spinning Method
%K Solid Oxide Fuel Cell
%K Nanofiber
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=87726