کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7705481 | 1497297 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study on charge transportation in the layer-structured oxide composite of SOFCs
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Study on charge transportation in the layer-structured oxide composite of SOFCs Study on charge transportation in the layer-structured oxide composite of SOFCs](/preview/png/7705481.png)
چکیده انگلیسی
In the past few years, triple (H+/O2â/eâ) conducting materials have been regarded as one of the most promising electrode categories for solid oxide fuel cells (SOFCs). In this work, a layer-structured LiNi0.8Co0.15Al0.05O2-δ (LNCA) with triple conduction has been studied. The semiconductor-ionic conductor (SIC) LNCA-SDC composite has been fabricated by compositing the LNCA material with ionic conductor, i.e., samarium doped ceria (SDC). The electrochemical performance of the LNCA-SDC composite was studied by electrochemical impedance spectroscopy, while its electronic conductivity was confirmed by d.c. polarization method. It is found that the ionic conductivity of the composite is higher than the electronic conductivity by several orders of magnitude. The charge carriers and transportation properties of LNCA-SDC were studied using H+ and O2â blocking layer cells respectively. Results prove that the LNCA-SDC composite is a hybrid oxygen ion-proton conducting material. The oxygen ion conduction is dominated at low temperature (425-500 °C), however, it is comparable with H+ conduction at high temperature (550 °C). Additionally, the formation of Li2CO3 under fuel cell operation environment was observed and the mechanism of the hybrid conductivity of LNCA-SDC was studied.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 28, 12 July 2018, Pages 12773-12781
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 28, 12 July 2018, Pages 12773-12781
نویسندگان
Xueqi Liu, Wenjing Dong, Chen Xia, Qiuan Huang, Yixiao Cai, Lili Wei, Guitai Wu, Xunying Wang, Yuzhu Tong, Zheng Qiao, Yuanjing Meng, Naveed Mushtaq, Baoyuan Wang, Hao Wang,