LaNi0.6Fe0.4O3阴极接触材料导电特性调控及其对SOFC电化学性能的影响
LaNi0.6Fe0.4O3 Cathode Contact Material:Electrical Conducting Property Manipulation and Its Effect on SOFC Electrochemical Performance
张琨 1王宇 1朱腾龙 1孙凯华 2韩敏芳 3钟秦1
作者信息
- 1. 南京理工大学 化学与化工学院, 南京 210094
- 2. 徐州华清京昆能源有限公司, 徐州 221005
- 3. 清华大学能源与动力工程系, 北京 100084
- 折叠
摘要
鉴于平板式固体氧化物燃料电池(SOFC)电堆对低面电阻、高稳定性阴极接触材料的需求,本研究阐明了LaNi0.6Fe0.4O3(LNF)颗粒尺寸调控对导电和SOFC单电池性能演变的影响机制,优化了LNF预处理工艺,降低了接触组件面电阻,提升了SOFC单电池性能及热循环稳定性.结果表明:预压造粒的样品(LNF-2)与高温烧结预处理的样品(LNF-3)的面电阻更小,分别为 0.074 和 0.076 Ω·cm²;在 750℃施加 1 A/cm2 电流负载后,能够更快地进入稳态,并保持颗粒尺寸稳定.其中,LNF-2 单电池在 750℃下的峰值功率密度 0.94 W/cm2 较未处理的 LNF 的0.66 W/cm2高,但在热循环过程中性能衰减较大,下降了20%;而LNF-3单电池在20次热循环后峰值功率密度仅下降了 4%.本研究对高可靠SOFC电堆装配及其长寿命稳定运行具有指导及参考价值.
Abstract
In order to fulfil the requirement of low area specific resistance and highly stable cathode contact material in planar type solid oxide fuel cell(SOFC)stack assembling,this work investigated the electrical property evolution of LaNi0.6Fe0.4O3(LNF)with manipulated particle size and its effect on SOFC electrochemical performance.The optimized pre-treatment strategies of LNF were obtained with decreasing ASR,improving SOFC single cell performance and thermal cycling stability.Results show that,the dry-pressed LNF-2 and the high-temperature sintering-pre-treated LNF-3 possess smaller area specific resistances of 0.074 and 0.076 Ω·cm²,respectively,more stable particle sizes with shorter conditioning state and faster transfer into steady state after applying 1 A/cm2 current load at 750℃.Specifically,the single cell with LNF-2 shows improved peak power density of 0.94 W/cm2 compared to 0.66 W/cm2 of LNF without treatment at 750℃.However,it exhibits significant performance degradation during thermal cycling,decreasing by 20%.In contrast,the peak power density of LNF-3 single cell decreases by only 4%after 20 thermal cycles.This work is expected to provide guideline and valued reference for reliable SOFC stack assembling and stable operation.
关键词
固体氧化物燃料电池(SOFC)/阴极接触材料/LaNi0.6Fe0.4O3/热循环Key words
solid oxide fuel cell(SOFC)/cathode contact material/LaNi0.6Fe0.4O3/thermal cycling引用本文复制引用
基金项目
国家重点研发计划(2018YFB1502203)
江苏省碳达峰碳中和科技创新专项(BE2022029)
出版年
2024
国家科技期刊平台
NSTL
万方数据