Pub Date : 2024-11-02DOI: 10.1016/j.matlet.2024.137643
Yue Chen, Junwen Liu, Yongjie Wu, Ziqiao Wang, Jie Li, Xin Liu, Dingyu Yang, Xiao Wang
Defects in all inorganic perovskite films currently limit the efficiency and long-term stability of perovskite solar cells (PSCs). In this study, we utilized the n-butylammonium cation as an additive to enhance the performance of PSCs. By incorporating n-butylammonium iodide, modifications in crystallization were achieved, resulting in high-quality CsPbI2Br perovskite films with larger grain sizes. As a result, the inverted PSCs with 1 mol percent additive exhibited an enhanced power conversion efficiency (PCE) of up to 13.0%, compared to the control PCE of 10.8%. The improvement can be primarily attributed to reduced trap states and suppressed charge recombination within the inverted PSCs. Furthermore, the hydrophobic nature of the additive noticeably improved the long-term stability of CsPbI2Br PSCs.
{"title":"Performance enhancement of inverted CsPbI2Br perovskite solar cells via butylammonium cation additive modification","authors":"Yue Chen, Junwen Liu, Yongjie Wu, Ziqiao Wang, Jie Li, Xin Liu, Dingyu Yang, Xiao Wang","doi":"10.1016/j.matlet.2024.137643","DOIUrl":"10.1016/j.matlet.2024.137643","url":null,"abstract":"<div><div>Defects in all inorganic perovskite films currently limit the efficiency and long-term stability of perovskite solar cells (PSCs). In this study, we utilized the n-butylammonium cation as an additive to enhance the performance of PSCs. By incorporating n-butylammonium iodide, modifications in crystallization were achieved, resulting in high-quality CsPbI<sub>2</sub>Br perovskite films with larger grain sizes. As a result, the inverted PSCs with 1 mol percent additive exhibited an enhanced power conversion efficiency (PCE) of up to 13.0%, compared to the control PCE of 10.8%. The improvement can be primarily attributed to reduced trap states and suppressed charge recombination within the inverted PSCs. Furthermore, the hydrophobic nature of the additive noticeably improved the long-term stability of CsPbI<sub>2</sub>Br PSCs.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137643"},"PeriodicalIF":2.7,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-02DOI: 10.1016/j.matlet.2024.137646
Abdelrahman Salman, Maxim Syrtanov, Andrey Lider
The study investigated the electrical conductivity and the resistivity of a Zr-1Nb zirconium alloy and the oxidation effect of a Tantalum/Chromium coating under High-Temperature (HT) air oxidation. The coatings were applied using magnetron sputtering, resulting in a Ta barrier sublayer between Cr and Zr substrates. After 1100 °C oxidation for 15–60 min, the coating stopped functioning as a diffusion barrier and started to peel off. Thermoelectromotive force (ThermoEMF), and four probe point (FPP) methods were used to evaluate the structural soundness and effectiveness of the coated zirconium alloys. The findings suggest Ta/Cr coating could be used for nuclear reactor core components in emergency situations.
该研究调查了 Zr-1Nb 锆合金的导电性和电阻率，以及钽/铬涂层在高温（HT）空气氧化条件下的氧化效应。涂层采用磁控溅射技术，在铬和锆基底之间形成 Ta 隔层。在 1100 °C 氧化 15-60 分钟后，涂层停止发挥扩散屏障的作用并开始剥落。热电动势（ThermoEMF）和四探点（FPP）方法用于评估涂层锆合金的结构完整性和有效性。研究结果表明，Ta/Cr 涂层可用于紧急情况下的核反应堆堆芯部件。
{"title":"High-Temperature oxidation effect of protective thin layers Ta/Cr coatings on Zr-1Nb alloy for corrosion-resistant components of nuclear reactors","authors":"Abdelrahman Salman, Maxim Syrtanov, Andrey Lider","doi":"10.1016/j.matlet.2024.137646","DOIUrl":"10.1016/j.matlet.2024.137646","url":null,"abstract":"<div><div>The study investigated the electrical conductivity and the resistivity of a Zr-1Nb zirconium alloy and the oxidation effect of a Tantalum/Chromium coating under High-Temperature (HT) air oxidation. The coatings were applied using magnetron sputtering, resulting in a Ta barrier sublayer between Cr and Zr substrates. After 1100 °C oxidation for 15–60 min, the coating stopped functioning as a diffusion barrier and started to peel off. Thermoelectromotive force (ThermoEMF), and four probe point (FPP) methods were used to evaluate the structural soundness and effectiveness of the coated zirconium alloys. The findings suggest Ta/Cr coating could be used for nuclear reactor core components in emergency situations.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137646"},"PeriodicalIF":2.7,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Temperature-dependent deformation behavior of [110] oriented micropillars of HfTaTiVZr refractory high entropy alloy (RHEA) was studied. Engineering stress–strain curves, strain rate sensitivity measurements, and in-situ observations revealed distinct deformation mechanisms at different temperatures: homogeneous at room temperature (RT), intermittent plasticity at 200 °C, chaotic stress drops at 400 °C, brittle failure at 600 °C, and creep-like behavior at 800 °C. Deformation morphology of the micropillars showed activation of few slip systems at RT and 200 °C, multiple slip systems at 400 °C, catastrophic failure at 600 °C, and minimal slip activity at 800 °C. These findings offer unique insights into the deformation of RHEAs.
{"title":"Temperature dependent small-scale deformation of a refractory high entropy alloy","authors":"Shristy Jha , Siva Shankar Alla , Sanjit Bhowmick , Sundeep Mukherjee","doi":"10.1016/j.matlet.2024.137649","DOIUrl":"10.1016/j.matlet.2024.137649","url":null,"abstract":"<div><div>Temperature-dependent deformation behavior of [110] oriented micropillars of HfTaTiVZr refractory high entropy alloy (RHEA) was studied. Engineering stress–strain curves, strain rate sensitivity measurements, and in-situ observations revealed distinct deformation mechanisms at different temperatures: homogeneous at room temperature (RT), intermittent plasticity at 200 °C, chaotic stress drops at 400 °C, brittle failure at 600 °C, and creep-like behavior at 800 °C. Deformation morphology of the micropillars showed activation of few slip systems at RT and 200 °C, multiple slip systems at 400 °C, catastrophic failure at 600 °C, and minimal slip activity at 800 °C. These findings offer unique insights into the deformation of RHEAs.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137649"},"PeriodicalIF":2.7,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1016/j.matlet.2024.137644
Junbiao Li , Hongsheng Luo , Kaibin Huang , Xiangjun Fu
A sunscreen multiple emulsion with a “two films and three phases” structure was prepared using a two-step emulsification method. In this system, the inner aqueous phase contained dissolved Glucosylrutin, while the oil phase included a triazine-based chemical UV absorber. The composition and morphology of the emulsion were optimized, and its rheological properties and physical stability were analyzed. This study demonstrates the application of multiple emulsions in sun protection, highlighting their synergistic behavior in UV defense and their capacity to enhance the antioxidant properties derived from Glucosylrutin.
{"title":"Synergistic sun protection via glucosylrutin-enhanced multiple emulsions","authors":"Junbiao Li , Hongsheng Luo , Kaibin Huang , Xiangjun Fu","doi":"10.1016/j.matlet.2024.137644","DOIUrl":"10.1016/j.matlet.2024.137644","url":null,"abstract":"<div><div>A sunscreen multiple emulsion with a “two films and three phases” structure was prepared using a two-step emulsification method. In this system, the inner aqueous phase contained dissolved Glucosylrutin, while the oil phase included a triazine-based chemical UV absorber. The composition and morphology of the emulsion were optimized, and its rheological properties and physical stability were analyzed. This study demonstrates the application of multiple emulsions in sun protection, highlighting their synergistic behavior in UV defense and their capacity to enhance the antioxidant properties derived from Glucosylrutin.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137644"},"PeriodicalIF":2.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1016/j.matlet.2024.137645
T.R. Luo , Z.Z. Fan , H.X. Hu , Y.Z. Tian
It is desired to optimize the strength-ductility balance of Al-Mg-Si casting alloy. In this study, Al-6 Mg-1Si-0.4Mn-0.5Cu-0.15Zr (6 Mg) and Al-8 Mg-1Si-0.8Mn-1.5Cu-0.15Zr (8 Mg) alloys were designed. The microstructure and mechanical properties of the alloys were further modified by heat treatment. The as-cast 6 Mg alloy exhibits balanced ultimate tensile strength (UTS) of 268.7 ± 11.5 MPa and elongation to failure (EF) of 5 ± 0.8 %, in contrast, the EF of the 8 Mg alloy is only 1.4 ± 0.3 %. Further heat treatment impacts slightly on the tensile properties of the 6 Mg alloy but enhances the ductility of the 8 Mg alloy significantly. Mechanisms for the distinct responses on the heat treatment of the alloys were discussed.
{"title":"Optimizing the strength-ductility balance of microalloyed Al-Mg-Si casting alloys","authors":"T.R. Luo , Z.Z. Fan , H.X. Hu , Y.Z. Tian","doi":"10.1016/j.matlet.2024.137645","DOIUrl":"10.1016/j.matlet.2024.137645","url":null,"abstract":"<div><div>It is desired to optimize the strength-ductility balance of Al-Mg-Si casting alloy. In this study, Al-6 Mg-1Si-0.4Mn-0.5Cu-0.15Zr (6 Mg) and Al-8 Mg-1Si-0.8Mn-1.5Cu-0.15Zr (8 Mg) alloys were designed. The microstructure and mechanical properties of the alloys were further modified by heat treatment. The as-cast 6 Mg alloy exhibits balanced ultimate tensile strength (UTS) of 268.7 ± 11.5 MPa and elongation to failure (EF) of 5 ± 0.8 %, in contrast, the EF of the 8 Mg alloy is only 1.4 ± 0.3 %. Further heat treatment impacts slightly on the tensile properties of the 6 Mg alloy but enhances the ductility of the 8 Mg alloy significantly. Mechanisms for the distinct responses on the heat treatment of the alloys were discussed.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137645"},"PeriodicalIF":2.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1016/j.matlet.2024.137642
Lidiya Sonowal, Sanjeev Gautam
Ocular drug delivery has its own set of challenges due to the eye’s complexity and barriers. Various nanocarriers have been developed to deliver drugs to the eye; however, this work focuses on carbon nanotubes (CNTs) as a nanocarrier. CNTs have unique properties that can address the challenges associated with ocular drug delivery. The novelty of this work is to integrate CNTs with ocular drugs to improve solubility, transport across barriers and sustained release. The structure and properties of CNTs are discussed in the context of ophthalmic applications. Functionalization of CNTs to enhance biocompatibility and optimize drug delivery is also discussed with recent updates. The key applications include improving solubility, penetration through ocular barriers and controlled release. Future directions and emerging trends in nanotechnology for ocular drug delivery are also considered herein.
{"title":"Ocular drug delivery strategies using carbon nanotubes: A perspective","authors":"Lidiya Sonowal, Sanjeev Gautam","doi":"10.1016/j.matlet.2024.137642","DOIUrl":"10.1016/j.matlet.2024.137642","url":null,"abstract":"<div><div>Ocular drug delivery has its own set of challenges due to the eye’s complexity and barriers. Various nanocarriers have been developed to deliver drugs to the eye; however, this work focuses on carbon nanotubes (CNTs) as a nanocarrier. CNTs have unique properties that can address the challenges associated with ocular drug delivery. The novelty of this work is to integrate CNTs with ocular drugs to improve solubility, transport across barriers and sustained release. The structure and properties of CNTs are discussed in the context of ophthalmic applications. Functionalization of CNTs to enhance biocompatibility and optimize drug delivery is also discussed with recent updates. The key applications include improving solubility, penetration through ocular barriers and controlled release. Future directions and emerging trends in nanotechnology for ocular drug delivery are also considered herein.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137642"},"PeriodicalIF":2.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-31DOI: 10.1016/j.matlet.2024.137627
Mingming Zhang , Dongwei Cao , Xing Huang , Guoqing Wang
To investigate the effects of rubber powder’s distribution on the ductility of RA, the force-ductility test (FDT) was conducted with rubber contents of 15, 20, 25, and 30 wt%, and the results demonstrated that the dense rubber powder in RA will reduce its ductility. The microscopic tests discovered that the rubber powder distribution significantly impacted the mechanical performance of RA. Subsequently, based on the Monte Carlo method and Python, models of RA were established, and FDT was simulated from the mesoscopic view. The findings demonstrated that the dense distribution of rubber powder led to poor ductility of RA. Consequentially, this study offered an innovative mesoscopic perspective of studying RA, particularly the multiple impacts of rubber powder distribution on RA.
为了研究橡胶粉分布对 RA 延展性的影响，在橡胶含量为 15、20、25 和 30 wt% 时进行了力-延展性试验（FDT），结果表明 RA 中致密的橡胶粉会降低其延展性。微观测试发现，橡胶粉的分布对 RA 的机械性能有很大影响。随后，基于蒙特卡罗方法和 Python，建立了 RA 模型，并从中观角度模拟了 FDT。研究结果表明，橡胶粉的密集分布导致 RA 的延展性较差。因此，该研究为研究 RA，尤其是橡胶粉分布对 RA 的多重影响提供了一个创新的中观视角。
{"title":"Evaluation and characterization of rubber powder distribution on the ductility of rubber asphalt from the mesoscopic view","authors":"Mingming Zhang , Dongwei Cao , Xing Huang , Guoqing Wang","doi":"10.1016/j.matlet.2024.137627","DOIUrl":"10.1016/j.matlet.2024.137627","url":null,"abstract":"<div><div>To investigate the effects of rubber powder’s distribution on the ductility of RA, the force-ductility test (FDT) was conducted with rubber contents of 15, 20, 25, and 30 wt%, and the results demonstrated that the dense rubber powder in RA will reduce its ductility. The microscopic tests discovered that the rubber powder distribution significantly impacted the mechanical performance of RA. Subsequently, based on the Monte Carlo method and Python, models of RA were established, and FDT was simulated from the mesoscopic view. The findings demonstrated that the dense distribution of rubber powder led to poor ductility of RA. Consequentially, this study offered an innovative mesoscopic perspective of studying RA, particularly the multiple impacts of rubber powder distribution on RA.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137627"},"PeriodicalIF":2.7,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-30DOI: 10.1016/j.matlet.2024.137640
Wenhua Yang, Kang Lu, Zhenling Tan, Chao Xie, Zhixiang Huang
The broad application of Cu-Cu direct bonding is substantially constrained owing to the propensity of copper to oxidize, coupled with complex processes including elevated bonding temperatures and compulsory protective atmospheres. Glycerol is employed to diminish Cu oxide while concurrently preserving the reduced Cu surface in ambient air. Cu-Cu direct bonding was thus accomplished at a lower temperature range (150 °C–200 °C) in ambient air, leveraging glycerol pretreatment for the reduction and protection. The effectiveness of glycerol in curtailing the surface oxidation of Cu at 200 °C in ambient air was discovered. The bonding strength exhibited a steady increase from 19.5 MPa to 32.6 MPa as the bonding temperature escalated from 150 °C to 200 °C. Furthermore, in the case of bonding at 200 °C, the bonding interface presented a dense, continuous nature with minimal oxide and carbon residue. Concurrently, good electrical properties were observed at the bonding interface.
铜-铜直接键合的广泛应用受到很大限制，这是因为铜容易氧化，而且键合过程复杂，包括键合温度升高和强制保护气氛。甘油可减少铜的氧化，同时在环境空气中保持还原的铜表面。因此，利用甘油预处理进行还原和保护，在较低温度范围（150 ℃-200 ℃）的环境空气中完成了铜-铜直接键合。研究发现，甘油能有效抑制铜在 200 °C 环境空气中的表面氧化。当粘合温度从 150 °C 升至 200 °C 时，粘合强度从 19.5 MPa 稳步上升至 32.6 MPa。此外，在 200 °C的键合过程中，键合界面呈现出致密、连续的特性，氧化物和碳残留物极少。同时，在键合界面上还观察到了良好的电性能。
{"title":"Glycerol surface pretreatment enabled Cu-Cu low-temperature direct bonding in ambient air","authors":"Wenhua Yang, Kang Lu, Zhenling Tan, Chao Xie, Zhixiang Huang","doi":"10.1016/j.matlet.2024.137640","DOIUrl":"10.1016/j.matlet.2024.137640","url":null,"abstract":"<div><div>The broad application of Cu-Cu direct bonding is substantially constrained owing to the propensity of copper to oxidize, coupled with complex processes including elevated bonding temperatures and compulsory protective atmospheres. Glycerol is employed to diminish Cu oxide while concurrently preserving the reduced Cu surface in ambient air. Cu-Cu direct bonding was thus accomplished at a lower temperature range (150 °C–200 °C) in ambient air, leveraging glycerol pretreatment for the reduction and protection. The effectiveness of glycerol in curtailing the surface oxidation of Cu at 200 °C in ambient air was discovered. The bonding strength exhibited a steady increase from 19.5 MPa to 32.6 MPa as the bonding temperature escalated from 150 °C to 200 °C. Furthermore, in the case of bonding at 200 °C, the bonding interface presented a dense, continuous nature with minimal oxide and carbon residue. Concurrently, good electrical properties were observed at the bonding interface.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137640"},"PeriodicalIF":2.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-30DOI: 10.1016/j.matlet.2024.137636
Mohammad Hossein Nikzad , Mohammad Heidari-Rarani , Reza Rasti
This study applied a computationally efficient Taguchi-based long-short-term memory (LSTM) algorithm to predict the elastic modulus of 3D-printed polylactic acid (PLA) specimens. 128 data points were collected from the literature, and 80% were allocated for training and the rest for the validation of the LSTM algorithm. The results suggested that the LSTM algorithm, configured with 25 units in the first memory cell, 100 units in the second memory cell, the “selu” activation function in the first memory cell, the “elu” activation function in the second memory cell, the RMSprop optimizer, and a learning rate of 0.01, was precisely able to predict the elastic modulus of 3D-printed PLA parts.
{"title":"Long-short-term memory (LSTM)-based modeling of the stiffness of 3D-printed PLA parts","authors":"Mohammad Hossein Nikzad , Mohammad Heidari-Rarani , Reza Rasti","doi":"10.1016/j.matlet.2024.137636","DOIUrl":"10.1016/j.matlet.2024.137636","url":null,"abstract":"<div><div>This study applied a computationally efficient Taguchi-based long-short-term memory (LSTM) algorithm to predict the elastic modulus of 3D-printed polylactic acid (PLA) specimens. 128 data points were collected from the literature, and 80% were allocated for training and the rest for the validation of the LSTM algorithm. The results suggested that the LSTM algorithm, configured with 25 units in the first memory cell, 100 units in the second memory cell, the “selu” activation function in the first memory cell, the “elu” activation function in the second memory cell, the RMSprop optimizer, and a learning rate of 0.01, was precisely able to predict the elastic modulus of 3D-printed PLA parts.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137636"},"PeriodicalIF":2.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Reversible symmetrical solid oxide cells (RS-SOCs) have attracted much attention due to their high energy conversion efficiency and fabrication simplicity. The double perovskite with the general formula A2BB’O6 is often used as the electrode material. In this study, Fe was substituted with Pd in the B-site of Sr1.9Fe1.5Mo0.5O6−δ to enhance the electrochemical performance above 50 %. The characterization results showed that the doping of Pd promoted the kinetics of the electrode reaction and thus improved the electrochemical activity. A maximum power density of 870 mW cm−2 at 800 ℃ on a La0.9Sr0.1Ga0.8Mg0.2O3–δ (LSGM)-supported symmetrical cell with Sr1.9Fe1.45Pd0.05Mo0.5O6-δ electrode was achieved in the solid oxide fuel cells (SOFCs).
{"title":"High-performance Sr1.9Fe1.45Pd0.05Mo0.5O6−δ electrode for reversible symmetrical solid oxide cells","authors":"Zhigang Chen, Yinxiao Wang, Yaowei Liu, Biao Wang, Bingbing Niu, Chunling Lu","doi":"10.1016/j.matlet.2024.137639","DOIUrl":"10.1016/j.matlet.2024.137639","url":null,"abstract":"<div><div>Reversible symmetrical solid oxide cells (RS-SOCs) have attracted much attention due to their high energy conversion efficiency and fabrication simplicity. The double perovskite with the general formula A<sub>2</sub>BB’O<sub>6</sub> is often used as the electrode material. In this study, Fe was substituted with Pd in the B-site of Sr<sub>1.9</sub>Fe<sub>1.5</sub>Mo<sub>0.5</sub>O<sub>6−δ</sub> to enhance the electrochemical performance above 50 %. The characterization results showed that the doping of Pd promoted the kinetics of the electrode reaction and thus improved the electrochemical activity. A maximum power density of 870 mW cm<sup>−2</sup> at 800 ℃ on a La<sub>0.9</sub>Sr<sub>0.1</sub>Ga<sub>0.8</sub>Mg<sub>0.2</sub>O<sub>3–</sub><em><sub>δ</sub></em> (LSGM)-supported symmetrical cell with Sr<sub>1.9</sub>Fe<sub>1.45</sub>Pd<sub>0.05</sub>Mo<sub>0.5</sub>O<sub>6-δ</sub> electrode was achieved in the solid oxide fuel cells (SOFCs).</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137639"},"PeriodicalIF":2.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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