Alternative Strategy for Development of Dielectric Calcium Copper Titanate‑Based Electrolytes for Low‑Temperature Solid Oxide Fuel Cells  

作　　者：Sajid Rauf Muhammad Bilal Hanif Zuhra Tayyab Matej Veis MAKYousaf Shah Naveed Mushtaq Dmitry Medvedev Yibin Tian Chen Xia Martin Motola Bin Zhu 

机构地区：[1]College of Mechatronics and Control Engineering,Shenzhen University,Shenzhen 518060,People’s Republic of China [2]Department of Inorganic Chemistry,Faculty of Natural Sciences,Comenius University Bratislava,Ilkovicova,684215 Bratislava,Slovakia [3]Energy Storage Joint Research Center,School of Energy and Environment,Southeast University,Nanjing 210096,People’s Republic of China [4]Hydrogen Energy Laboratory,Ural Federal University,620002 Ekaterinburg,Russia [5]Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes,Institute of High Temperature Electrochemistry,620066 Ekaterinburg,Russia [6]School of Microelectronics,Hubei University,Wuhan 430062,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第1期310-332,共23页纳微快报（英文版）

基　　金：National Natural Science Foundation of China(NSFC)supported this work under Grant No.32250410309,11674086,51736006,and 51772080;funding from Science and Technology Department of Jiangsu Province under Grant No.BE2022029;Shenzhen University under Grant No.86902/000248 also supported part of this work.

摘　　要：The development of low-temperature solid oxide fuel cells(LT-SOFCs)is of significant importance for realizing the widespread application of SOFCs.This has stimulated a substantial materials research effort in developing high oxide-ion conductivity in the electrolyte layer of SOFCs.In this context,for the first time,a dielectric material,CaCu_(3)Ti_(4)O_(12)(CCTO)is designed for LT-SOFCs electrolyte application in this study.Both individual CCTO and its heterostructure materials with a p-type Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ)(NCAL)semiconductor are evaluated as alternative electrolytes in LT-SOFC at 450–550℃.The single cell with the individual CCTO electrolyte exhibits a power output of approximately 263 mW cm^(-2) and an open-circuit voltage(OCV)of 0.95 V at 550℃,while the cell with the CCTO–NCAL heterostructure electrolyte capably delivers an improved power output of approximately 605 mW cm^(-2) along with a higher OCV over 1.0 V,which indicates the introduction of high hole-conducting NCAL into the CCTO could enhance the cell performance rather than inducing any potential short-circuiting risk.It is found that these promising outcomes are due to the interplay of the dielectric material,its structure,and overall properties that led to improve electrochemical mechanism in CCTO–NCAL.Furthermore,density functional theory calculations provide the detailed information about the electronic and structural properties of the CCTO and NCAL and their heterostructure CCTO–NCAL.Our study thus provides a new approach for developing new advanced electrolytes for LT-SOFCs.

关 键 词：LT-SOFCs Dielectric CaCu_(3)Ti_(4)O_(12) Semiconductor Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ) Ionic conductivity Heterostructure electrolyte 

分 类 号：TB34[一般工业技术—材料科学与工程] TM911.4[电气工程—电力电子与电力传动]