Proton transport controlled at surface layer of CeO_(2) by gradient-doping with a built-in-field effect

作     者：Yuzheng Lu Naveed Mushtaq M.A.K Yousaf Shah Sajid Rauf Chen Xia Bin Zhu Yuzheng Lu;Naveed Mushtaq;M.A.K Yousaf Shah;Sajid Rauf;Chen Xia;Bin Zhu

作者机构：School of Electronic EngineeringNanjing Xiaozhuang UniversityNanjing21171China School of PhysicsElectronics and Intelligent ManufacturingHuaihua UniversityHuaihua418008China Jiangsu Provincial Key Laboratory of Solar Energy Science and Technology/Energy Storage Joint Research CenterSchool of Energy and EnvironmentSoutheast UniversityNanjing210096China College of Electronics and Information EngineeringShenzhen UniversityShenzhen58000China Faculty of Physics and Electronic ScienceHubei UniversityWuhan430062China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2023年第41卷第12期

页      面：2025-2032,I0008页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 08[工学] 0708[理学-地球物理学] 0703[理学-化学] 

基　　金：Project supported by the Fundamental Research Funds for the Central Universities (3203002105A2,4303002184) Jiangsu Provincial Program (JSSCRC2021491) 

主　　题：La_(0.20)Sr_(0.05)Ce_(0.65)Co_(0.1)0_(2-δ)(LSCC) Gradient doping Fast protonic transport High grain boundary conduction Built-in electric field Rare earths 

摘      要：Ceramic fuel cells hold an important position for the sustainable energy future using renewable energy sources with high *** design and synthesis of active materials,interface engineering and having capability of low operating temperature is considered as an important factor to further increase the power output and stability of ceramic fuel cell devices.A novel methodology has vital importance to develop new functionalities of existing materials by introducing new different *** built-in electric field(BIEF) is one of the most recently used approaches to improve charge transfer and ionic conductivity of solid oxide ***,we demonstrate gradient doping strategy in CeO_(2)-δstructure to produce BIEF effect and to modulate the proton transport effectively at the surface layer rather than bulk *** inclusions of La and Sr metal ions at the surface and Co-metal ions into bulk-layer of CeO_(2)form the gradiently doped *** gradient doping into CeO_(2)highly improves the proton transport properties through the surface layer by modifying the energy ***,unbalanced charge distribution due to gradient doping produces built-in electric-field to provide extra driving force for protons transport through surface *** acquired gradiently doped fluorite structure exhibits remarkable proton conductivity of0.2 S/cm,as a result ceramic fuel cell shows power output of1000 mW/cm2while operating at 500℃.This unique work highlights the critical role of gradiently doped electrolyte in electrochemical conversion energy devices and offers new understanding and practices for sustainable energy future.