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Enhancing the Ionic Conduction of Ceria-Based Electrolytes for LT-SOFCs via Entropy Engineering 认领 引用
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作者 Xiu-Xiu Li En-Yi Hu +4 位作者 Fa-Ze Wang Jun Wang Chen Xia Aleksandar Staykov Peter Lund 《Rare Metals》 SCIE EI CAS CSCD 2026年第1期616-628,共13页
Developing alternative electrolytes with enhanced ionic conductivity is crucial to reducing the operating temperature of solid oxide fuel cells(SOFCs)for broader applications.Entropy engineering offers many opportunit... Developing alternative electrolytes with enhanced ionic conductivity is crucial to reducing the operating temperature of solid oxide fuel cells(SOFCs)for broader applications.Entropy engineering offers many opportunities for material design,presenting a promising avenue to develop new electrolytes.In this work,two new ceria-based electrolytes,the medium-entropy Sm0.25La0.25Pr0.25Ce0.25O2-δ(SLPC25)and low-entropy Sm0.05La0.05Pr0.05Ce0.85O2-δ(SLPC5)are designed for low-temperature SOFCs using the entropy engineering strategy,with pure CeO2as a reference.It is found that higher configurational entropy leads to enriched oxygen vacancies in the two oxides and thus enhances the ionic transport,which is verified through material characterizations,density functional theory calculations,and cell performance tests.The medium-entropy SLPC25exhibits superior cell performance(836 mW cm-2)and improved ionic conductivity(0.09 S cm-1)at 520℃as compared to those of the low-entropy SLPC5 and CeO2.Further investigation confirms the hybrid proton-oxygen ion conduction and good fuel cell stability of the SLPC25 electrolyte.This study indicates that higher entropy enhances the ionic conductivity and cell performance of ceria-based electrolytes.The entropy engineering strategy used here holds significant potential to develop advanced electrolytes for low-temperature SOFCs. 展开更多
关键词 ceria electrolyte electrochemical performance entropy engineering ionic conductivity SOFCs
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固定反光板抛物面聚光器的原理及实验研究 认领 引用
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作者 余雷 陈吉丰 +2 位作者 杨嵩 彼德·路德 王军 《太阳能学报》 EI CAS CSCD 北大核心 2026年第7期518-529,共12页
提出一种新的太阳能聚光器概念设计——固定反光板抛物面聚光器,它由一个固定放置的、采用非对称抛物面线形的反光板和一个可移动的接收器组成。与传统的线性聚光器(槽式和线性菲涅尔式)相比,具有转动部件少、建造成本低、土地利用率高... 提出一种新的太阳能聚光器概念设计——固定反光板抛物面聚光器,它由一个固定放置的、采用非对称抛物面线形的反光板和一个可移动的接收器组成。与传统的线性聚光器(槽式和线性菲涅尔式)相比,具有转动部件少、建造成本低、土地利用率高等优点。首先通过光学模拟和实验研究偏离角与聚光特性之间的关系,然后通过建立数学模型研究偏离角的分布特性。结果表明:对于不同地理位置,当该聚光器采用东西轴向放置、抛物线倾角设为当地纬度时,聚光斑最小且整体聚光比达到8~22,初步验证了该聚光器在不同时间和位置条件下进行太阳能聚光的可行性。 展开更多
关键词 太阳能 线性聚光器 蒙特卡罗方法 几何光学 接收器 反光板 偏离角
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Dietary supplementation with xylooligosaccharides and exogenous enzyme improves milk production,energy utilization efficiency and reduces enteric methane emissions of Jersey cows 认领 引用 被引量：9
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作者 Lifeng Dong Lei Zhao +5 位作者 Bowei Li Yanhua Gao Tianhai Yan Peter Lund Zhuofan Liu Qiyu Diao 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2023年第6期2514-2524,共11页
Background Sustainable strategies for enteric methane(CH4)mitigation of dairy cows have been extensively explored to improve production performance and alleviate environmental pressure.The present study aimed to in... Background Sustainable strategies for enteric methane(CH4)mitigation of dairy cows have been extensively explored to improve production performance and alleviate environmental pressure.The present study aimed to investigate the effects of dietary xylooligosaccharides(XOS)and exogenous enzyme(EXE)supplementation on milk production,nutrient digestibility,enteric CH4 emissions,energy utilization efficiency of lactating Jersey dairy cows.Forty-eight lactating cows were randomly assigned to one of 4 treatments:(1)control diet(CON),(2)CON with 25 g/d XOS(XOS),(3)CON with 15 g/d EXE(EXE),and(4)CON with 25 g/d XOS and 15 g/d EXE(XOS+EXE).The 60-d experimental period consisted of a 14-d adaptation period and a 46-d sampling period.The enteric CO2and CH4 emissions and O2 consumption were measured using two GreenFeed units,which were further used to determine the energy utilization efficiency of cows.Results Compared with CON,cows fed XOS,EXE or XOS+EXE significantly(P<0.05)increased milk yield,true protein and fat concentration,and energy-corrected milk yield(ECM)/DM intake,which could be reflected by the significant improvement(P<0.05)of dietary NDF and ADF digestibility.The results showed that dietary supplementation of XOS,EXE or XOS+EXE significantly(P<0.05)reduced CH4 emission,CH4/milk yield,and CH4/ECM.Furthermore,cows fed XOS demonstrated highest(P<0.05)metabolizable energy intake,milk energy output but lowest(P<0.05)of CH4 energy output and CH4 energy output as a proportion of gross energy intake compared with the remaining treatments.Conclusions Dietary supplementary of XOS,EXE or combination of XOS and EXE contributed to the improvement of lactation performance,nutrient digestibility,and energy utilization efficiency,as well as reduction of enteric CH4 emissions of lactating Jersey cows.This promising mitigation method may need further research to validate its long-term effect and mode of action for dairy cows. 展开更多
关键词 Energy utilization efficiency Enteric methane emissions Exogenous enzyme Jersey cows Xylooligosaccharides
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用背反射提高染料敏化太阳能电池光电转换效率的研究 认领 引用 被引量：2
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作者 黄光胜 杨芸 +1 位作者 Janne Halme Peter Lund 《功能材料》 EI CAS 北大核心 2009年第4期629-631,634,共3页
当光射入染料敏化太阳能电池(DSCs)时,有部分光不能被染料、电解液、导电玻璃等吸收,这部分光将透过电池而未被利用,本研究利用普通镀铝玻璃镜做为背底,将这部分透射光通过背反射重新射入电池来提高DSCs的光电转换效率。研究结果表明,... 当光射入染料敏化太阳能电池(DSCs)时,有部分光不能被染料、电解液、导电玻璃等吸收,这部分光将透过电池而未被利用,本研究利用普通镀铝玻璃镜做为背底,将这部分透射光通过背反射重新射入电池来提高DSCs的光电转换效率。研究结果表明,背反射能大幅度提高DSCs的短路电流,短路电流的增加率随着测试遮光罩开孔尺寸的增加而增加,并且随纳米TiO2薄膜厚度的增加而降低。 展开更多
关键词 太阳能电池 染料敏化 二氧化钛 背反射
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纳米TiO_2薄膜厚度与不锈钢基体对染料敏化太阳能电池的影响 认领 引用 被引量：1
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作者 黄光胜 Janne Halme +1 位作者 杨芸 Peter Lund 《功能材料》 EI CAS 北大核心 2008年第10期1752-1755,共4页
由于用金属做光阳极基体的染料敏化太阳能电池(DSCs)可以制作成柔性电池,成本低并且有广泛的用途,受到越来越多的关注。用导电玻璃和304不锈钢作为基体制作了DSCs,研究了纳米TiO2薄膜厚度和不锈钢基体对DSCs光电转换性能以及稳定性的影... 由于用金属做光阳极基体的染料敏化太阳能电池(DSCs)可以制作成柔性电池,成本低并且有广泛的用途,受到越来越多的关注。用导电玻璃和304不锈钢作为基体制作了DSCs,研究了纳米TiO2薄膜厚度和不锈钢基体对DSCs光电转换性能以及稳定性的影响。结果表明,TiO2薄膜厚度在20μm左右,玻璃DSCs具有较高的光电转化效率和稳定性。而不锈钢DSCs的稳定性较差,特别是不锈钢做光阳极基体的DSCs。 展开更多
关键词 太阳能电池 染料敏化 不锈钢基体 稳定性
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Emerging semiconductor ionic materials tailored by mixed ionic-electronic conductors for advanced fuel cells 认领 引用 被引量：4
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作者 Bushra Bibi Atif Nazar +10 位作者 Bin Zhu Fan Yang Muhammad Yousaf Rizwan Raza M.A.K.Yousaf Shah Jung-Sik Kim Muhammad Afzal Yongpeng Lei Yifu Jing Peter Lund Sining Yun 《Advanced Powder Materials》 2024年第6期1-25,共25页
Mixed ionic-electronic conductors(MIECs)play a crucial role in the landscape of energy conversion and storage technologies,with a pronounced focus on electrode materials’application in solid oxide fuel cells(SOFCs)an... Mixed ionic-electronic conductors(MIECs)play a crucial role in the landscape of energy conversion and storage technologies,with a pronounced focus on electrode materials’application in solid oxide fuel cells(SOFCs)and proton-conducting ceramic fuel cells(PCFCs).In parallel,the emergence of semiconductor ionic materials(SIMs)has introduced a new paradigm in the field of functional materials,particularly for both electrode and electrolyte development for low-temperature,300–550℃,SOFCs,and PCFCs.This review article critically delves into the intricate mechanisms underpinning the synergistic relationship between MIECs and SIMs,with a particular emphasis on elucidating the fundamental working principles of semiconductor ionic membrane fuel cells(SIMFCs).By exploring critical facets such as ion-coupled electron transferransport,junction effect,energy bands alignment,and theoretical computations,it casts an illuminating spotlight on the transformative potential of MIECs,also involving triple charge conducting oxides(TCOs)in the context of SIMs and advanced fuel cells(FCs).The insights and findings articulated herein contribute substantially to the advancement of SIMs and SIMFCs by tailoring MIECs(TCOs)as promising avenues toward the emergence of high-performance SIMFCs.This scientific quest not only addresses the insistent challenges surrounding efficient charge transfer,ionic transport and power output but also unlocks the profound potential for the widespread commercialization of FC technology. 展开更多
关键词 MIEC SIM e-i coupling SIMFC TCO Surface and interface Heterostructures
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Synergistic Proton and Oxygen Ion Transport in Fluorite Oxide-Ion Conductor 认领 引用 被引量：1
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作者 Yong Yu M.A.K.Yousaf Shah +5 位作者 Hao Wang Xiaomeng Cheng Liejin Guo Jianbing Huang Peter Lund Bin Zhu 《Energy Material Advances》 EI CAS CSCD 2024年第1期543-553,共11页
Current perovskite oxide electrolytes,i.e.,acceptor-doped Ba(Ce,Zr)O3-δ,exhibit proton conductivity ranging from 10-3 to 10-2 S cm−1 at 600℃ for protonic ceramic fuel cells(PCFCs),which rely on the struc... Current perovskite oxide electrolytes,i.e.,acceptor-doped Ba(Ce,Zr)O3-δ,exhibit proton conductivity ranging from 10-3 to 10-2 S cm−1 at 600℃ for protonic ceramic fuel cells(PCFCs),which rely on the structural defects.However,bulk doping and sintering restrict these oxides to possess higher ionic conductivity.New-generation PCFCs with alternative ion conduction mechanism need to be developed.This study presents a novel approach to realize high proton conduction along a fluorite oxide-ion conductor gadolinium-doped ceria(GDC:Gd0.1Ce0.9O2-δ)by electrochemical proton injection via a fuel cell process.A high protonic conductivity of 0.158 S cm−1 has been achieved.This fuel cell employing a 400-μm-thick GDC electrolyte delivered a peak power output close to 1,000 mW cm−2 at 500℃.Proton conduction is verified by electrochemical impedance spectroscopy,proton filtering cell and isotopic effect,and so on.Proton injection into GDC after fuel cell testing is clarified by x-ray photoelectron spectroscopy,Raman spectra,1H solid-state nuclear magnetic resonance spectra,and so on.Furthermore,a synergistic mechanism involving both surface proton conduction and bulk oxygen-ion migration is proposed by comparing electrochemical impedance spectroscopy with distribution of relaxation time results of GDC and pure ceria.This finding may provide new insights into the ion transport mechanism on fluorite oxides and open new avenues for advanced low-temperature PCFCs. 展开更多
关键词 protonic ceramic fuel cells pcfcs which perovskite oxide electrolytesieacceptor doped fluorite oxide ion conductor ionic conductivitynew generation structural defectshoweverbulk doping protonic ceramic fuel cells proton conductivity oxygen ion transport
Rumen microbiota-host transcriptome interaction mediates the protective effects of trans-10,cis-12 CLA on facilitating weaning transition of lambs 认领 引用 被引量：1
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作者 Chunlei Yang Xiangfei Deng +6 位作者 Peter Lund Haixia Liu Xingwang Ding Zhengwei Fu Naifeng Zhang Jinjun Li Lifeng Dong 《Animal Nutrition》 SCIE CAS CSCD 2023年第1期345-359,共15页
Developing alternatives to antibiotics for prevention of gastrointestinal dysbiosis in early-weaning farmed animals is urgently needed.This study was to explore the potential effects of trans-10,cis-12 conjugated lino... Developing alternatives to antibiotics for prevention of gastrointestinal dysbiosis in early-weaning farmed animals is urgently needed.This study was to explore the potential effects of trans-10,cis-12 conjugated linoleic acid(CLA)on maintaining ruminal homeostasis of young ruminants during the weaning transition period.Thirty neonatal lambs were selected(6 lambs per group)and euthanized for rumen microbial and epithelial analysis.The lambs were weaned at 28 d and experienced the following 5 treatments:euthanized on d 28 as the pre-weaning control(CON0),fed starter feed for 5(CON5)or 21(CON21)d,fed starter feed with 1%of CLA supplemented for 5(CLA5)or 21(CLA21)d.Results showed that the average daily weight gain and dry matter intake were significantly higher in CLA5 than CON5 group.As compared with the CON5 and CON21 group,the relative abundances of volatile fatty acid(VFA)producing bacteria including Bacteroides,Treponema,Parabacteroides and Anaerovibrio,as well as the concentrations of acetate,butyrate and total VFA were significantly increased in CLA5 and CLA21 group,respectively.Integrating microbial profiling and epithelial transcriptome results showed that 7 downregulated inflammatory signaling-related host genes IL2RA,CXCL9,CD4,CCR4,LTB,SPP1,and BCL2A1 with CLA supplementation were significantly negatively correlated with both VFA concentration and VFA producing bacteria,while 3(GPX2,SLC27A2 and ALDH3A1)and 2(GSTM3 and GSTA1)upregulated metabolism-related genes,significantly positively correlated with either VFA concentration or VFA producing bacteria,respectively.To confirm the effects of CLA on epithelial signal transduction,in vitro experiment was further conducted by treating rumen epithelial cells without or with IL-17A+TNF-αfor 12 h after pretreatment of 100μM CLA or not(6 replicates per treatment).The results demonstrated the anti-inflammatory effect of CLA via suppressing the protein expression of NF-кB p-p65/p65 with the activation of peroxisome proliferator-activated receptor gamma(PPARγ).In conclusion,CLA supplementation enhanced the ruminal microbiota-driven transcriptional regulation in healthy rumen epithelial development via rumen VFA production,and CLA may therefore serve as an alternative way to alleviate early-weaning stress and improve physiological and metabolic conditions of young ruminants. 展开更多
关键词 Trans-10,cis-12 conjugated linoleic acid Rumen microbiota Epithelial transcriptome Peroxisome proliferator-activated receptor gamma Weaning stress
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旅行医学必备手册 认领 引用
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作者 Peter Lund 马雪征 《国外科技新书评介》 EI 2016年第7期12-12,共1页
近几十年来，随着旅游业的发展，全球化航空运输变得更加便捷快速，极大地方便了旅行者，同时也成为传染病传播的桥梁。美国一项关于旅行者的队列研究表明：64％的旅行者在旅途中出现健康问题，其中8％的人因此就医；26％的旅行者回国... 近几十年来，随着旅游业的发展，全球化航空运输变得更加便捷快速，极大地方便了旅行者，同时也成为传染病传播的桥梁。美国一项关于旅行者的队列研究表明：64％的旅行者在旅途中出现健康问题，其中8％的人因此就医；26％的旅行者回国后患病，其中12％的人去医院接受诊治。 展开更多
关键词 旅行者 手册 医学 航空运输 健康问题 队列研究 旅游业 全球化
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