Pub Date : 2025-03-21DOI: 10.1016/j.jmat.2025.101056
Li-Qian Cheng, Yongke Yan, Zhiping Wang, Zhengyu Li, Xiaotian Li
The increasing demand for effective and environmentally compatible cooling technologies has driven significant interest in the development of solid–state cooling materials. Among these, the electrocaloric (EC) system is considered a promising solid–state cooling method, offering advantages over other cooling technologies, such as low environmental impact, cost–effectiveness, high energy efficiency, and compact device size. To fully harness the potential of EC materials, multilayer ceramic capacitors (MLCCs) have emerged as effective and appropriate structures for EC cooling applications. This article provides a comprehensive review of recent advancements and research trends in MLCC–based EC materials, including the fundamentals of the EC effect, the performance of MLCC–based EC materials, EC effect (ECE) measurement, multilayer geometric structure design, and cooling device design based on MLCCs. A comparison of different systems of EC materials, along with an exploration of microstructure improvement, was conducted based on recent studies. A special focus was placed on multilayer structure design for EC performance enhancement, followed by reviewing two types of EC cooling device designs. The review offers insights into the fabrication and characterization of MLCC–based EC materials, offering guidance for future developments in EC material research and practical applications.
{"title":"Electrocaloric materials and applications based on multilayer ceramic capacitors","authors":"Li-Qian Cheng, Yongke Yan, Zhiping Wang, Zhengyu Li, Xiaotian Li","doi":"10.1016/j.jmat.2025.101056","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101056","url":null,"abstract":"The increasing demand for effective and environmentally compatible cooling technologies has driven significant interest in the development of solid–state cooling materials. Among these, the electrocaloric (EC) system is considered a promising solid–state cooling method, offering advantages over other cooling technologies, such as low environmental impact, cost–effectiveness, high energy efficiency, and compact device size. To fully harness the potential of EC materials, multilayer ceramic capacitors (MLCCs) have emerged as effective and appropriate structures for EC cooling applications. This article provides a comprehensive review of recent advancements and research trends in MLCC–based EC materials, including the fundamentals of the EC effect, the performance of MLCC–based EC materials, EC effect (ECE) measurement, multilayer geometric structure design, and cooling device design based on MLCCs. A comparison of different systems of EC materials, along with an exploration of microstructure improvement, was conducted based on recent studies. A special focus was placed on multilayer structure design for EC performance enhancement, followed by reviewing two types of EC cooling device designs. The review offers insights into the fabrication and characterization of MLCC–based EC materials, offering guidance for future developments in EC material research and practical applications.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"27 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143666757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The dielectric ceramic capacitor serves as the core energy storage element in the pulsed power system. However, the inability to balance high energy storage density (Wrec) and energy storage efficiency (η) has become a technical challenge limiting the miniaturisation of pulsed power devices. This work proposes an entropy-driven strategy, through introducing Sr(Sc0.5Nb0.5)O3 (SSN) as an end-member, to modulate the phase structure and suppress interfacial polarization in the medium entropy matrix, (Bi0.5Na0.5)0.5Ba0.5TiO3 (BN50BT). The introduction of SSN endows BN50BT ceramics with a multiphase structure of P4mm and Pm-3m and successfully establishes a super-paraelectric (SPE) state at room temperature, improving the polarization response. Furthermore, the incorporation of SSN effectively suppresses interfacial polarization and enhances the Eb of the system. Thus, the 0.80[(Bi0.5Na0.5)0.5Ba0.5TiO3]-0.20Sr(Sc0.5Nb0.5)O3 ceramics exhibit a decent Wrec of 6.24 J/cm3 and a high η of 89.02%, along with remarkable stabilities over a wide frequency range (5–150 Hz) and temperature range (25–140 °C). This work demonstrates that the entropy-driven construction of a multiphase-coexisting SPE state, along with suppressed interfacial polarization, represents a feasible approach to optimizing the energy storage properties of dielectric ceramics.
{"title":"Entropy-driven multi-scale enhancement of energy storage performance in (Bi0.5Na0.5)0.5Ba0.5TiO3 ceramics","authors":"Yue Pan, Yu Zhang, Qinpeng Dong, Jiangping Huang, Xiuli Chen, Xu Li, Lian Deng, Huanfu Zhou","doi":"10.1016/j.jmat.2025.101055","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101055","url":null,"abstract":"The dielectric ceramic capacitor serves as the core energy storage element in the pulsed power system. However, the inability to balance high energy storage density (<em>W</em><sub>rec</sub>) and energy storage efficiency (<em>η</em>) has become a technical challenge limiting the miniaturisation of pulsed power devices. This work proposes an entropy-driven strategy, through introducing Sr(Sc<sub>0.5</sub>Nb<sub>0.5</sub>)O<sub>3</sub> (SSN) as an end-member, to modulate the phase structure and suppress interfacial polarization in the medium entropy matrix, (Bi<sub>0.5</sub>Na<sub>0.5</sub>)<sub>0.5</sub>Ba<sub>0.5</sub>TiO<sub>3</sub> (BN50BT). The introduction of SSN endows BN50BT ceramics with a multiphase structure of <em>P</em>4<em>mm</em> and <em>Pm</em>-3<em>m</em> and successfully establishes a super-paraelectric (SPE) state at room temperature, improving the polarization response. Furthermore, the incorporation of SSN effectively suppresses interfacial polarization and enhances the <em>E</em><sub>b</sub> of the system. Thus, the 0.80[(Bi<sub>0.5</sub>Na<sub>0.5</sub>)<sub>0.5</sub>Ba<sub>0.5</sub>TiO<sub>3</sub>]-0.20Sr(Sc<sub>0.5</sub>Nb<sub>0.5</sub>)O<sub>3</sub> ceramics exhibit a decent <em>W</em><sub>rec</sub> of 6.24 J/cm<sup>3</sup> and a high <em>η</em> of 89.02%, along with remarkable stabilities over a wide frequency range (5–150 Hz) and temperature range (25–140 °C). This work demonstrates that the entropy-driven construction of a multiphase-coexisting SPE state, along with suppressed interfacial polarization, represents a feasible approach to optimizing the energy storage properties of dielectric ceramics.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"34 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143666659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ultrasonic imaging technology has advanced rapidly, the escalating demand for imaging quality has driven the continuous development of ultrasonic transducers featuring high-performance. Among them, the crucial factors constraining the further enhancement of imaging quality are the frequency of the device and the intensity of the echo signal. Piezoelectric composites have become a hotspot for ultrasonic transducers and imaging applications due to their excellent properties. However, due to the limitations of the accuracy of the cutting process, the development of piezoelectric/polymer composites is often undermined by undesirable pseudo-vibrations, especially in high-frequency applications, which will significantly reduce energy conversion efficiency. In this study, a novel design method of 1-3 piezoelectric composites with gradient nanoparticle doped polymer is proposed to eliminate the undesired lateral vibrations. Based on the optimized composites, a high-performance composite ultrasonic transducer with a center frequency of 8.51 MHz is prepared. Compared with the traditional composite transducer, the optimized transducer improves the echo voltage amplitude significantly, reaching nearly 3 times. The above advantages are further verified in high-quality ultrasound and photoacoustic imaging. The optimization method has valuable guidance for the design of high-frequency composite transducers, which have great potential in ultrasonic and photoacoustic imaging applications.
{"title":"Gradient piezoelectric composites for ultrasonic transducer design and imaging applications","authors":"Chenxue Hou, Zhaoxi Li, Chunlong Fei, Qibo Lin, Xiaofei Luo, Xiongwei Wei, Yiheng Yang, Qi Lu, Yi Quan, Guangzhi Dong, Zeyu Chen, Xiaozhou Lü, Weimin Bao, Yintang Yang","doi":"10.1016/j.jmat.2025.101049","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101049","url":null,"abstract":"Ultrasonic imaging technology has advanced rapidly, the escalating demand for imaging quality has driven the continuous development of ultrasonic transducers featuring high-performance. Among them, the crucial factors constraining the further enhancement of imaging quality are the frequency of the device and the intensity of the echo signal. Piezoelectric composites have become a hotspot for ultrasonic transducers and imaging applications due to their excellent properties. However, due to the limitations of the accuracy of the cutting process, the development of piezoelectric/polymer composites is often undermined by undesirable pseudo-vibrations, especially in high-frequency applications, which will significantly reduce energy conversion efficiency. In this study, a novel design method of 1-3 piezoelectric composites with gradient nanoparticle doped polymer is proposed to eliminate the undesired lateral vibrations. Based on the optimized composites, a high-performance composite ultrasonic transducer with a center frequency of 8.51 MHz is prepared. Compared with the traditional composite transducer, the optimized transducer improves the echo voltage amplitude significantly, reaching nearly 3 times. The above advantages are further verified in high-quality ultrasound and photoacoustic imaging. The optimization method has valuable guidance for the design of high-frequency composite transducers, which have great potential in ultrasonic and photoacoustic imaging applications.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"33 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-03-14DOI: 10.1016/j.jmat.2025.101044
Shanshan Hu, Chen Huang, Changyuan Li, Long Yang, Zhiwei Chen, Baisheng Sa, Wen Li, Yanzhong Pei
Thermal stability of thermoelectric devices plays a pivotal role in their practical applications. Chemical reaction/diffusion between thermoelectric materials and electrodes is one of the primary factors contributing to the degradation/failure of device performance at elevated temperatures. Introducing barrier layers to impede the behavior of chemical reactions has emerged as an effective approach for averting the failure of these devices. In this work, the FeSi is revealed to be a potent material of barrier layer in high-performance Mg2Si0.3Sn0.7 thermoelectric material based on the considerations of interfacial reaction energy and sinterability. The well-established bond in Mg2Si0.3Sn0.7/FeSi joint results in a low contact resistivity of ∼20 μΩ⸱cm2 and a conversion efficient of ∼6.5% for the Mg2Si0.3Sn0.7 single-leg device is achieved at a temperature difference of ∼290 K. The long-term measurements of the device at a hot-side temperature of 600 K reveal that the performance remains nearly invariable as time further increases, which suggests that the FeSi layer retards the chemical reaction/diffusion.
{"title":"Thermal stability of FeSi as barrier layer in high-performance Mg2Si0.3Sn0.7 thermoelectric device","authors":"Shanshan Hu, Chen Huang, Changyuan Li, Long Yang, Zhiwei Chen, Baisheng Sa, Wen Li, Yanzhong Pei","doi":"10.1016/j.jmat.2025.101044","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101044","url":null,"abstract":"Thermal stability of thermoelectric devices plays a pivotal role in their practical applications. Chemical reaction/diffusion between thermoelectric materials and electrodes is one of the primary factors contributing to the degradation/failure of device performance at elevated temperatures. Introducing barrier layers to impede the behavior of chemical reactions has emerged as an effective approach for averting the failure of these devices. In this work, the FeSi is revealed to be a potent material of barrier layer in high-performance Mg<sub>2</sub>Si<sub>0.3</sub>Sn<sub>0.7</sub> thermoelectric material based on the considerations of interfacial reaction energy and sinterability. The well-established bond in Mg<sub>2</sub>Si<sub>0.3</sub>Sn<sub>0.7</sub>/FeSi joint results in a low contact resistivity of ∼20 μΩ⸱cm<sup>2</sup> and a conversion efficient of ∼6.5% for the Mg<sub>2</sub>Si<sub>0.3</sub>Sn<sub>0.7</sub> single-leg device is achieved at a temperature difference of ∼290 K. The long-term measurements of the device at a hot-side temperature of 600 K reveal that the performance remains nearly invariable as time further increases, which suggests that the FeSi layer retards the chemical reaction/diffusion.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"55 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-03-13DOI: 10.1016/j.jmat.2025.101054
Yingli Zhang, Haopeng Du, Dirui Wu, Jinxin Ge, Jiahao Song, Mengkang Xu, Qingjiao Huang, Jiangyu Li, Changjian Li
Transparent conducting oxides are increasingly important for optoelectronic and thin film transistor applications. La doped BaSnO3 is a strong candidate for its high transparency, high carrier concentration, high mobility and abundancy. However, due to the lack of lattice-matched substrates, the mobility of La:BaSnO3 remains inferior to single crystals. Here, by constructing a novel approach via delta doping La:BaSnO3 in a BaSnO3/La:BaSnO3/BaSnO3 (BSO/LBSO/BSO) heterostructure, we achieved room temperature mobility enhancement up to 110 cm2⸱V–1⸱s–1 while keeping the high carrier concentration at 5×1020 cm–3, reaching to the highest electrical conductivity in BaSnO3 based systems. The mobility is enhanced more than 100% compared to our La:BaSnO3 films, which is among the highest mobility in BaSnO3 based films and heterostructures. From atomic structural investigations, we found that both (1) the carrier confinement due to delta doping and (2) dislocation-free La:BaSnO3 conducting channel, revealed by atomic resolution scanning transmission electron microscopy (STEM) studies, are responsible for mobility enhancement. The enhanced mobility from heterostructure approach is widely applicable for transparent electrodes and high current thin film transistor applications.
{"title":"Enhancing room temperature electron mobility at high carrier concentration in transparent BaSnO3/La:BaSnO3/BaSnO3 heterostructures","authors":"Yingli Zhang, Haopeng Du, Dirui Wu, Jinxin Ge, Jiahao Song, Mengkang Xu, Qingjiao Huang, Jiangyu Li, Changjian Li","doi":"10.1016/j.jmat.2025.101054","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101054","url":null,"abstract":"Transparent conducting oxides are increasingly important for optoelectronic and thin film transistor applications. La doped BaSnO<sub>3</sub> is a strong candidate for its high transparency, high carrier concentration, high mobility and abundancy. However, due to the lack of lattice-matched substrates, the mobility of La:BaSnO<sub>3</sub> remains inferior to single crystals. Here, by constructing a novel approach via delta doping La:BaSnO<sub>3</sub> in a BaSnO<sub>3</sub>/La:BaSnO<sub>3</sub>/BaSnO<sub>3</sub> (BSO/LBSO/BSO) heterostructure, we achieved room temperature mobility enhancement up to 110 cm<sup>2</sup>⸱V<sup>–1</sup>⸱s<sup>–1</sup> while keeping the high carrier concentration at 5×10<sup>20</sup> cm<sup>–3</sup>, reaching to the highest electrical conductivity in BaSnO<sub>3</sub> based systems. The mobility is enhanced more than 100% compared to our La:BaSnO<sub>3</sub> films, which is among the highest mobility in BaSnO<sub>3</sub> based films and heterostructures. From atomic structural investigations, we found that both (1) the carrier confinement due to delta doping and (2) dislocation-free La:BaSnO<sub>3</sub> conducting channel, revealed by atomic resolution scanning transmission electron microscopy (STEM) studies, are responsible for mobility enhancement. The enhanced mobility from heterostructure approach is widely applicable for transparent electrodes and high current thin film transistor applications.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"7 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Recent advancements in AI have spurred interest in ferroelectric memristors for neuromorphic chips due to their ability to precisely control resistive states through polarization flip-flop without electroforming. However, oxygen vacancies in these devices often cause high leakage current, low endurance, and dispersed switching voltages. Here, we introduce a silicon-based integrated (Ba0.6Sr0.4TiO3)0.5(Nd2O3)0.5 (BSTN) nanoscaffolded ferroelectric thin film memristor with a vertically self-assembled nanocomposite structure (VSNs) optimally oriented on La0.67Sr0.33MnO3/SrTiO3/P–Si substrates. This device demonstrates a widely tunable ferroelectric domain range (0°–180°), high remnant polarization (21.04 μC/cm2), and a greater number of unitary states (16 states or 4 bits). It exhibits high durability, enduring over 109 switching cycles. The switching mechanism combines ferroelectric polarization and oxygen vacancy migration, enabling the simulation of biological synaptic functions via bi-directional conductance tunability. Additionally, we implemented a low-power (0.57 pJ per event) multi-factor secure encryption system for smart locks using 16×16 BSTN memristor crossbar arrays and a pressure sensor. Under multiple factors (disordered inputs, specific users, and corresponding passwords) the system recognized passwords with 97.6% accuracy and a 3.8% loss rate after 500 iterations. Overall, this work establishes a robust foundation for advancing multilevel storage, neuromorphic computing, and AI chip applications based on ferroelectric memristors.
{"title":"Nanoscaffold Ba0.6Sr0.4TiO3:Nd2O3 ferroelectric memristors crossbar array for neuromorphic computing and secure encryption","authors":"Weifeng Zhang, Jikang Xu, Yongrui Wang, Yinxing Zhang, Yu Wang, Pengfei Li, Yongqing Jia, Zhen Zhao, Changliang Li, Biao Yang, Yue Hou, Zhenqiang Guo, Zeze Huang, Yincheng Qi, Xiaobing Yan","doi":"10.1016/j.jmat.2025.101051","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101051","url":null,"abstract":"Recent advancements in AI have spurred interest in ferroelectric memristors for neuromorphic chips due to their ability to precisely control resistive states through polarization flip-flop without electroforming. However, oxygen vacancies in these devices often cause high leakage current, low endurance, and dispersed switching voltages. Here, we introduce a silicon-based integrated (Ba<sub>0.6</sub>Sr<sub>0.4</sub>TiO<sub>3</sub>)<sub>0.5</sub>(Nd<sub>2</sub>O<sub>3</sub>)<sub>0.5</sub> (BSTN) nanoscaffolded ferroelectric thin film memristor with a vertically self-assembled nanocomposite structure (VSNs) optimally oriented on La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub>/SrTiO<sub>3</sub>/P–Si substrates. This device demonstrates a widely tunable ferroelectric domain range (0°–180°), high remnant polarization (21.04 μC/cm<sup>2</sup>), and a greater number of unitary states (16 states or 4 bits). It exhibits high durability, enduring over 10<sup>9</sup> switching cycles. The switching mechanism combines ferroelectric polarization and oxygen vacancy migration, enabling the simulation of biological synaptic functions via bi-directional conductance tunability. Additionally, we implemented a low-power (0.57 pJ per event) multi-factor secure encryption system for smart locks using 16×16 BSTN memristor crossbar arrays and a pressure sensor. Under multiple factors (disordered inputs, specific users, and corresponding passwords) the system recognized passwords with 97.6% accuracy and a 3.8% loss rate after 500 iterations. Overall, this work establishes a robust foundation for advancing multilevel storage, neuromorphic computing, and AI chip applications based on ferroelectric memristors.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"5 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-03-12DOI: 10.1016/j.jmat.2025.101052
Xuyao Tang, Zimeng Hu, Vladimir Koval, Harry Baxter, Mirva Eriksson, Richard Whiteley, Krishnarjun Banerjee, Giuseppe Viola, Bin Yang, Haixue Yan
Lead zirconate titanate (PZT) ceramics are the most widely used commercial piezoelectric ceramics. However, the relationships between structure and properties are still not completely clarified. In this work, a broad investigation is carried out on commercial PZT 5A, 5H and 4D ceramics. X-ray diffraction revealed that these compounds mainly contain a mixture of P4mm and C1m1 phases at room temperature, and poling induced an increased unit cell distortion in both phases and a higher content of the monoclinic phase. In the poled samples, the Curie point shifts towards lower temperatures, contradicting the Abrahams-Kurtz-Jamieson (AKJ) relation for distorted displacive ferroelectrics. The discordance in the phase transition behavior can be attributed to the decreased domain wall density in the PZT systems. Furthermore, the observed increase of the dielectric permittivity from radiofrequency to the THz range is explained by the increase of the ferroelectric distortion associated with the field-induced transitions and decreased domain wall density. A parameter ψ was introduced to characterize the asymmetry of ferroelectric hysteresis loops. The higher ψ value of the hard PZT 4D ceramic compared to that of soft PZT 5A and 5H is attributed to the pinning effect of oxygen vacancies on domain walls.
{"title":"Relationships between structure and properties in commercial lead zirconate titanate (PZT) piezoceramics","authors":"Xuyao Tang, Zimeng Hu, Vladimir Koval, Harry Baxter, Mirva Eriksson, Richard Whiteley, Krishnarjun Banerjee, Giuseppe Viola, Bin Yang, Haixue Yan","doi":"10.1016/j.jmat.2025.101052","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101052","url":null,"abstract":"Lead zirconate titanate (PZT) ceramics are the most widely used commercial piezoelectric ceramics. However, the relationships between structure and properties are still not completely clarified. In this work, a broad investigation is carried out on commercial PZT 5A, 5H and 4D ceramics. X-ray diffraction revealed that these compounds mainly contain a mixture of <em>P</em>4<em>mm</em> and <em>C</em>1<em>m</em>1 phases at room temperature, and poling induced an increased unit cell distortion in both phases and a higher content of the monoclinic phase. In the poled samples, the Curie point shifts towards lower temperatures, contradicting the Abrahams-Kurtz-Jamieson (AKJ) relation for distorted displacive ferroelectrics. The discordance in the phase transition behavior can be attributed to the decreased domain wall density in the PZT systems. Furthermore, the observed increase of the dielectric permittivity from radiofrequency to the THz range is explained by the increase of the ferroelectric distortion associated with the field-induced transitions and decreased domain wall density. A parameter ψ was introduced to characterize the asymmetry of ferroelectric hysteresis loops. The higher ψ value of the hard PZT 4D ceramic compared to that of soft PZT 5A and 5H is attributed to the pinning effect of oxygen vacancies on domain walls.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"87 3 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143598832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Silica (SiO2), with its high theoretical capacity and abundance, holds great potential as anode material for lithium-ion batteries (LIBs). However, its practical application is hindered by inherently low conductivity and significant volume change during cycling. In this work, we present a simple yet effective strategy to address these challenges by homogeneously binding high-density, ultra-small SiO2 nanoparticles within a carbon nanosheet framework (denoted as SiO2@CNS). In this design, densely packed sufficiently-small SiO2 nanoparticles (about 6 nm) ensure high electrochemical reactivity, while the conductive and flexible CNS matrix facilitates rapid ion/electron transfer and buffers volume changes during cycling. As a result, the SiO2@CNS anode delivers a remarkable capacity of 607.3 mA⸱h/g after 200 cycles at 0.1 A/g, superior rate capability (407.4 mA⸱h/g at 2 A/g) and outstanding durability, retaining 93.1% of its capacity after 2000 cycles at 1 A/g. In-situ transmission electron microscopy and ex-situ microscopic and spectroscopic analyses reveal moderate volume variation and exceptional structural stability during cycling, supported by the formation of a robust solid-electrolyte interphase that underpins its long-lasting performance. Full cells paired with commercial LiFePO4 cathode exhibit outstanding rate and cycling performance. This work provides valuable insights into developing highly-efficient SiO2-based anodes for high-performance LIBs.
{"title":"Effective binding sufficiently-small SiO2 nanoparticles within carbon nanosheets framework enables a high-performing and durable anode for lithium-ion batteries","authors":"Zhefei Sun, Zhiwen Zhang, Shenghui Zhou, Weicheng Liu, Jianhui Liu, Quanzhi Yin, Jianhai Pan, Xiaoyu Wu, Zilong Zhuang, Dong-Liang Peng, Qiaobao Zhang","doi":"10.1016/j.jmat.2025.101053","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101053","url":null,"abstract":"Silica (SiO<sub>2</sub>), with its high theoretical capacity and abundance, holds great potential as anode material for lithium-ion batteries (LIBs). However, its practical application is hindered by inherently low conductivity and significant volume change during cycling. In this work, we present a simple yet effective strategy to address these challenges by homogeneously binding high-density, ultra-small SiO<sub>2</sub> nanoparticles within a carbon nanosheet framework (denoted as SiO<sub>2</sub>@CNS). In this design, densely packed sufficiently-small SiO<sub>2</sub> nanoparticles (about 6 nm) ensure high electrochemical reactivity, while the conductive and flexible CNS matrix facilitates rapid ion/electron transfer and buffers volume changes during cycling. As a result, the SiO<sub>2</sub>@CNS anode delivers a remarkable capacity of 607.3 mA⸱h/g after 200 cycles at 0.1 A/g, superior rate capability (407.4 mA⸱h/g at 2 A/g) and outstanding durability, retaining 93.1% of its capacity after 2000 cycles at 1 A/g. <em>In-situ</em> transmission electron microscopy and <em>ex-situ</em> microscopic and spectroscopic analyses reveal moderate volume variation and exceptional structural stability during cycling, supported by the formation of a robust solid-electrolyte interphase that underpins its long-lasting performance. Full cells paired with commercial LiFePO<sub>4</sub> cathode exhibit outstanding rate and cycling performance. This work provides valuable insights into developing highly-efficient SiO<sub>2</sub>-based anodes for high-performance LIBs.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"4 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143589983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To ablate tumor tissues safely and efficiently occupy a high priority in physical cancer therapy. However, it is still a challenge to realize high conversion efficiency of photothermal reagents and multi-functions with low health risks. Herein, nano-heterostructure membrane was synthesized by composting MoSe2:Nd nanosheets and graphene nanoflakes for improving the therapy efficiency and efficacy. It not only exerts fulfilling photothermal behaviors under 808 nm laser excitation, but also exhibits outstanding laser-induced photodynamic performance due to photogenerated carriers transfer from unique physical heterostructure. With bimodal photothermal/photodynamic therapy potential, the heterojunction structure is incorporated into the polydimethylsiloxane (PDMS) film and subcutaneously implanted into animate bodies, which further facilitate biomedical safety and experiment operability in tumor treatments, cutting off the possible risks arising from direct injection. In vitro photothermal properties and biomedical experiments strongly proof the composite film can exert intense photothermal response at laser excitation and possess considerably satisfactory biocompatibility, effectively eliminating tumor tissues without undesirable damage and pathological changes to normal organs.
{"title":"Laser driven 2D heterostructure nanocomposite membranes with bimodal photothermal and photodynamic functions","authors":"Congcong Wang, Yu Meng, Cuilu Xi, Yinyan Li, Jianbin Zhang, Junqiang Dong, Yanbang Lian, Shiqing Xu, Gongxun Bai, Xin Sun","doi":"10.1016/j.jmat.2025.101050","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101050","url":null,"abstract":"To ablate tumor tissues safely and efficiently occupy a high priority in physical cancer therapy. However, it is still a challenge to realize high conversion efficiency of photothermal reagents and multi-functions with low health risks. Herein, nano-heterostructure membrane was synthesized by composting MoSe<sub>2</sub>:Nd nanosheets and graphene nanoflakes for improving the therapy efficiency and efficacy. It not only exerts fulfilling photothermal behaviors under 808 nm laser excitation, but also exhibits outstanding laser-induced photodynamic performance due to photogenerated carriers transfer from unique physical heterostructure. With bimodal photothermal/photodynamic therapy potential, the heterojunction structure is incorporated into the polydimethylsiloxane (PDMS) film and subcutaneously implanted into animate bodies, which further facilitate biomedical safety and experiment operability in tumor treatments, cutting off the possible risks arising from direct injection. <em>In vitro</em> photothermal properties and biomedical experiments strongly proof the composite film can exert intense photothermal response at laser excitation and possess considerably satisfactory biocompatibility, effectively eliminating tumor tissues without undesirable damage and pathological changes to normal organs.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"15 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-03-08DOI: 10.1016/j.jmat.2025.101045
Jia Wang, Yuanbo Zhang, Zijian Su, Tao Jiang
Silicon (Si) has been proven to significantly enhance CO2 reduction efficiency of numerous catalysts. However, the lack of research on Si's effect on manganese ferrite catalytic performance presents a challenge in using high-silica manganese ore to prepare cost-effective, efficient manganese-based ferrite decarbonization catalysts. This work prepared Nano-MnFe2O4 materials containing 0.0%–9.3%Si (2.3% increments, in mass fraction) by solid-phase synthesis (1300 °C, air) and nano-grinding. The effect, mechanism, and enhancement strategy of Si on the low-temperature catalytic reduction of CO2 to carbon (C) performance of Nano-MnFe2O4 were systematically investigated. Results showed that introducing Si transformed Nano-MnFe2O4 into Nano-MnXFe3–XO4 (0.75 < X < 1.00) with degraded catalysis and Nano-FeYMnZSiO4 with almost no activity, lowering CO2 reduction to C from 5.55 mmol/g to 2.81 mmol/g. Increasing Si concentration simultaneously decreased the content and X-value of Nano-MnXFe3-XO4, causing fewer oxygen vacancies and declined CO2 reduction. A phase reconstruction strategy to eliminate Si impact and enhance catalysis was proposed, i.e., adding MgO, increasing Mn/Fe ratio, and nano-grinding followed by magnetic separation. Nano-Mg0.19Mn1.70Fe1.11O4 reconstructed from Nano-MnFe2O4 with 2.3% Si exhibited 8.82 mmol/g CO2 reduction and 100% carbon conversion at 350 °C. Mg2+ doping strengthened the conversion of Mn2+ to highly catalytically active Mn3+ and Mn4+ ions, increasing oxygen vacancies and electron transport for C=O rupture.
{"title":"Enhancing catalytic CO2 reduction to carbon performance of nano-MnFe2O4 prepared from high-silica manganese ores via MgO phase reconstruction strategy","authors":"Jia Wang, Yuanbo Zhang, Zijian Su, Tao Jiang","doi":"10.1016/j.jmat.2025.101045","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101045","url":null,"abstract":"Silicon (Si) has been proven to significantly enhance CO<sub>2</sub> reduction efficiency of numerous catalysts. However, the lack of research on Si's effect on manganese ferrite catalytic performance presents a challenge in using high-silica manganese ore to prepare cost-effective, efficient manganese-based ferrite decarbonization catalysts. This work prepared Nano-MnFe<sub>2</sub>O<sub>4</sub> materials containing 0.0%–9.3%Si (2.3% increments, in mass fraction) by solid-phase synthesis (1300 °C, air) and nano-grinding. The effect, mechanism, and enhancement strategy of Si on the low-temperature catalytic reduction of CO<sub>2</sub> to carbon (C) performance of Nano-MnFe<sub>2</sub>O<sub>4</sub> were systematically investigated. Results showed that introducing Si transformed Nano-MnFe<sub>2</sub>O<sub>4</sub> into Nano-Mn<sub><em>X</em></sub>Fe<sub>3–<em>X</em></sub>O<sub>4</sub> (0.75 < <em>X</em> < 1.00) with degraded catalysis and Nano-Fe<sub><em>Y</em></sub>Mn<sub><em>Z</em></sub>SiO<sub>4</sub> with almost no activity, lowering CO<sub>2</sub> reduction to C from 5.55 mmol/g to 2.81 mmol/g. Increasing Si concentration simultaneously decreased the content and <em>X</em>-value of Nano-Mn<sub><em>X</em></sub>Fe<sub>3-<em>X</em></sub>O<sub>4</sub>, causing fewer oxygen vacancies and declined CO<sub>2</sub> reduction. A phase reconstruction strategy to eliminate Si impact and enhance catalysis was proposed, <em>i.e.</em>, adding MgO, increasing Mn/Fe ratio, and nano-grinding followed by magnetic separation. Nano-Mg<sub>0.19</sub>Mn<sub>1.70</sub>Fe<sub>1.11</sub>O<sub>4</sub> reconstructed from Nano-MnFe<sub>2</sub>O<sub>4</sub> with 2.3% Si exhibited 8.82 mmol/g CO<sub>2</sub> reduction and 100% carbon conversion at 350 °C. Mg<sup>2+</sup> doping strengthened the conversion of Mn<sup>2+</sup> to highly catalytically active Mn<sup>3+</sup> and Mn<sup>4+</sup> ions, increasing oxygen vacancies and electron transport for C=O rupture.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"8 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：