Functional layer engineering to improve performance of protonic ceramic fuel cells  

作　　者：Ning Wang Zhi-Yin Huang Chun-Mei Tang Li-Xin Xing Ling Meng Yoshitaka Aoki Lei Du Si-Yu Ye 

机构地区：[1]Huangpu Hydrogen Energy Innovation Center,School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou,510006,China [2]Graduate School of Chemical Sciences and Engineering,Hokkaido University,Sapporo,060-8628,Japan [3]Faculty of Engineering,Hokkaido University,Sapporo,060-8628,Japan

出　　处：《Rare Metals》2023年第7期2250-2260,共11页稀有金属（英文版）

基　　金：financially supported by China Post-doctoral Science Foundation(No.2022M710856);Guangzhou Postdoctoral Research Project(No.62104380);the Outstanding Youth Project of Natural Science Foundation of Guangdong Province(No.2022B1515020020);the Funding by Science and Technology Projects in Guangzhou(Nos.202206050003 and 202201010603);Guangdong Engineering Technology Research Center for Hydrogen Energy and Fuel Cells。

摘　　要：Protonic ceramic fuel cells(PCFCs)have been attracting increasing attention because of their advances in high-efficiency power generation in an intermediate-temperature range,as compared to the high-temperature solid oxide fuel cells(SOFCs).The greatest difference between PCFCs and SOFCs is the specific requirement of protonic(H+)conductivity at the PCFC cathode,in addition to the electronic(e^(-))and oxide-ion(O^(2-))conductivity.The development of a triple H^(+)/e^(-)/O^(2-)conductor for PCFC cathode is still challenging.Thus,the most-widely used cathode material is based on the mature e^(-)/O^(2-)conductor.However,this leads to insufficient triple phase boundary(TPB),i.e.,reaction area.Herein,an efficient strategy that uses a~100 nm-thick proton conductive functional layer(La_(0.5)Sr_(0.5)CoO_(3-δ),LSC55)in-between the typical La_(0.8)Sr_(0.2)CoO_(3-δ)cathode(a mature e-/O^(2-)conductor,LS C 82)and B aZr_(0.4)Ce_(0.4)Y_(0.1)Yb_(0.)1O_(3-δ)elec trolyte(11 mm in diameter,20μm in thickness)is proposed to significantly enhance the reaction area.Reasonably,the ohmic resistance and polarization resistance are both decreased by 47%and 62%,respectively,compared with that of PCFCs without the functional layer.The power density of the PCFC with such a functional layer can be raised by up to 2.24 times,superior to those described in previous reports.The enhanced PCFC performances are attributed to the well-built TPB and enhanced reaction area via the functional layer engineering strategy.

关 键 词：Protonic ceramic fuel cell(PCFC) Cathode functional layer(CFL) Power density Triple phase boundary(TPB) 

分 类 号：TM911.4[电气工程—电力电子与电力传动]