Analysis of nanofiber-based La0.2Sr0.8TiO3-Gd0.2Ce0.8O1.9 electrode kinetics

Yuwei Wang; Erqing Zhao; Liquan Fan; Qianjun Hu; Xijun Liu; Yufeng Li; Yueping Xiong

doi:10.1039/c8ra06522e

Analysis of nanofiber-based La_0.2Sr_0.8TiO₃-Gd_0.2Ce_0.8O_1.9 electrode kinetics

RSC Adv. 2018 Oct 18;8(62):35658-35663. doi: 10.1039/c8ra06522e. eCollection 2018 Oct 15.

Authors

Yuwei Wang¹, Erqing Zhao², Liquan Fan¹, Qianjun Hu³, Xijun Liu¹, Yufeng Li¹, Yueping Xiong³

Affiliations

¹ College of Materials Science and Engineering, Heilongjiang Provincial Key Laboratory of Polymeric Composite Materials, Qiqihar University No. 42, Wenhua Street Qiqihar 161006 China Liquan_Fan@163.com.
² School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology Xinxiang 453003 China.
³ MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology 92 West Dazhi Street, Mailbox 1247 Harbin 150001 China ypxiong@hit.edu.cn.

Abstract

For the sake of comparison, a single cell with nanofiber-based LST-GDC composite anode (Cell-1) and a single cell with nanoparticle-based LST-GDC composite anode (Cell-2) are fabricated, respectively. The electrolyte ohmic resistances of the LST-GDC composite anode side half-cells are determined by an AC resistance measurement. Current interrupt is applied to measure the ohmic resistance of the half-cells. Combined with V-I characteristics, the influences of the potential drops caused by electrolyte ohmic resistance, electrode ohmic resistance and electrode electrochemical reaction on the cell kinetics are investigated. Under a current density of 0.6 A cm^-2 at 850 °C, for the nanofiber-based LST-GDC composite anode (NF-LST-GDC), the electrode ohmic potential drop is 0.007 V and the potential drop caused by the electrode electrochemical reaction is 0.080 V. While for the nanoparticle-based LST-GDC composite anode (NP-LST-GDC), the corresponding potential drops are 0.159 V and 0.246 V, respectively. Both the potential drops of the former are lower than those of the latter. The kinetics of Cell-1 is greater than Cell-2, i.e., the kinetics of NF-LST-GDC is greater than that of NP-LST-GDC.