JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 2
·1-12
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IF 2.8
Su Qi,Qu Jing-Jing,Liu Fei,Feng Ai-lin,Yuan Chang-Lai,Liu Xiao,Meng Liu-Fang,Ding Guo-An,Su Ming-wei,Chen Guo-Hua
A series of new systems of the SrCe 1- x Ti x O 3 and SrCe 1− x Zr x O 3 (SCT x and SCZ x , x = 0.0–0.1) ceramics have been prepared by the traditional solid-phase methods. The XRD patterns results show that an ABO 3 -type perovskite structure of the SrCeO 3 ceramic can be obtained as x = 0.0. With the increase in Ti 4+ - and Zr 4+ -ions-doping content of x = 0.02–0.1, the SCT x and SCZ x ceramics basically belong to the perovskite phase with the orthorhombic structure of the space group Pmcn (62), and the results of EDS analysis on the proportion of each element can also verify the correctness of the XRD analytical results. In addition, all the microstructures are dense for the SCT x and SCZ x ( x = 0.0–0.1) samples. The fitting results of complex plane impedance verified that the temperature stability of SCT x solid solution ceramics is more suitable for adjusting to the practical application range. Especially, the SCT x ( x = 0.03) ceramics sintered at 1270 °C for 4 h can obtain the relatively excellent dielectric properties of ε r = 50.16, Q × f = 8,940 GHz (at 5.91 GHz), and τ f = + 0.08 ppm/°C.
研究领域:
材料科学
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陶瓷工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Zhiqiang Yang,Enyue Zhao,Na Li,Lei Gao,Lunhua He,Baotian Wang,Fangwei Wang,Yusheng Zhao,Jinkui Zhao,Songbai Han
Increasing the charging cutoff voltage is a viable approach to push the energy density limits of LiCoO2 and meet the requirements of the rapid development of 3C electronics. However, an irreversible oxygen redox is readily triggered by the high charging voltage, which severely restricts practical applications of high-voltage LiCoO2. In this study, we propose a modification strategy via suppressing surface ligand-to-metal charge transfer to inhibit the oxygen redox-induced structure instability. A d0 electronic structure Zr4+ is selected as the charge transfer insulator and successfully doped into the surface lattice of LiCoO2. Using a combination of theoretical calculations, ex situ X-ray absorption spectra, and in situ differential electrochemical mass spectrometry analysis, our results show that the modified LiCoO2 exhibits suppressed oxygen redox activity and stable redox electrochemistry. As a result, it demonstrates a robust long-cycle lattice structure with a practically eliminated voltage decay (0.17 mV/cycle) and an excellent capacity retention of 89.4% after 100 cycles at 4.6 V. More broadly, this work provides a new perspective on suppressing the oxygen redox activity through modulating surface ligand-to-metal charge transfer for achieving a stable high-voltage ion storage structure.
研究领域:
材料科学
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电化学
·
储能技术
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DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Li Yingying,Liu Chunyan,Zhang Peisen,Huang Jiayi,Ning Haoran,Xiao Peng,Hou Yi,Jing Lihong,Gao Mingyuan
The rare-earth nanocrystals containing Er3+ emitters offer very promising tools for imaging applications, as they can not only exhibit up-conversion luminescence but also down-conversion luminescence in the second near-infrared window (NIR II). Doping non-lanthanide cations into host matrix was demonstrated to be an effective measure for improving the luminescence efficiency of Er3+ ions, while still awaiting in-depth investigations on the effects of dopants especially those with high valence states on the optical properties of lanthanide nanocrystals. To address this issue, tetravalent Zr4+ doped hexagonal NaGdF4:Yb,Er nanocrystals were prepared, and the enhancement effects of the Zr4+ doping level on both up-conversion luminescence in the visible window and down-conversion luminescence in NIR II window were investigated, with steady-state and transient luminescence spectroscopies. The key role of the local crystal field distortions around Er3+ emitters was elucidated in combination with the results based on both of Zr4+ and its lower valence counterparts, e.g., Sc3+, Mg2+, Mn2+. Univalent ions such as Li+ was utilized to substitute Na+ ion rather than Gd3+, and the synergistic effects of Zr4+ and Li+ ions by co-doping them into NaGdF4:Yb,Er nanocrystals were investigated toward optimal enhancement. Upon optimization, the up-conversion emission of co-doped NaGdF4:Yb,Er nanocrystals was enhanced by more than one order of magnitude compared with undoped nanocrystals. The current studies thus demonstrate that the local crystal field surrounding emitters is an effective parameter for manipulating the luminescence of lanthanide emitters.
研究领域:
材料科学
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光学
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生物医学成像
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Dongxu Wang,Miao Pan,Wen-Jie Chen,Zhibin Cheng,Xiaoyang Pan
Novel CaCu 3- x Zn x Ti 3.95 Zr 0.05 O 12 (CCZTZO, x = 0.025 - 0.1) ceramics were synthesized via a sol-gel route to optimize the intrinsic dielectric limitations of CaCu 3 Ti 4 O 12 (CCTO). Systematic investigation of Zn 2+ and Zr 4+ co-doping effects and annealing temperature variations (900 - 1050 °C) on microstructure and dielectric characteristics revealed: XRD analysis confirmed phase-pure CCZTZO crystallization with complete elimination of secondary phases after organic binder removal via re-sintering at 1000 °C. SEM and XPS characterizations validated successful dopant incorporation, demonstrating a monotonic reduction in grain size with increasing Zn 2+ content. Impedance spectroscopy revealed enhanced electrical resistance and substantially reduced dielectric loss tangent (tanδ) while maintaining high dielectric constants (ε′). Optimal performance was achieved in CaCu 2.9 Zn 0.1 Ti 3.95 Zr 0.05 O 12 (CCZTZO-4), exhibiting an low tanδ of 0.002 with high ε′ ≈ 1.27 × 10 3 . Furthermore, excellent frequency stability was observed across 10 2 Hz - 10 5 Hz, with ε′ maintained at ∼10 3 and tanδ consistently between 0.002 - 0.054. Temperature-dependent measurements revealed outstanding thermal stability with a relative permittivity coefficient Δε′/ε′ 25°C ≤ ±10 % over − 60 °C to 120 °C. Analysis of electrical modulus and impedance spectra indicated modified activation energies for both bulk and grain boundary responses, demonstrating that Zn 2+ and Zr 4+ co-doping effectively enhances the interfacial polarization mechanism in CCTO-based ceramics.
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Polymers
·
2026
·Vol. 18
·期 12
·1502
·
IF 5.8
Mujin Yang,Qihan Jia,Shuang Wang,Haibo Wang
Conductive hydrogels are promising materials for fabricating flexible wearable strain sensors. However, their practical application remains limited by several challenges, including poor mechanical strength, unstable sensitivity, restricted stretchability, and poor structural durability. In this study, a zirconium-reinforced conductive hydrogel (PSPZr) with a dual chemical–physical cross-linked network was designed and developed. In the structural framework, polypyrrole-decorated silk fibroin (SF/PPy) functioned as a conductive reinforcing component, acrylamide and sulfobetaine methacrylate constituted the flexible polymer basis, and zirconium ions (Zr4+) acted as ionic cross-linkers to construct a dual cross-linked structure and improve mechanical stability. Due to the synergistic contributions of hydrogen bonding, ionic coordination interactions, and SF/PPy, the optimized PSPZr hydrogel exhibited a tensile strength of 166 kPa and a maximum strain 559%. Additionally, it achieved improved elasticity and reliable shape recovery. Furthermore, the optimized PSPZr hydrogel exhibited a broad working range, sensitivity with a gauge factor of 2.8, rapid response, recovery kinetics, and exceptional cycling stability over 1000 stretching–releasing cycles as wearable strain sensors. This performance enabled real-time and accurate monitoring of diverse human motions. Therefore, this study presents a feasible and versatile strategy for developing mechanically robust and electrically stable conductive hydrogel, providing a new pattern for advanced applications in wearable sensors.
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PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-15
·
IF 15.7
Zhang Yanlin,Lei Lei,Wang Jin,Li Shangzhen,Liu Yanzheng,Sun Yuqing,Liao Tongxin,Chen Rong,Wang Cong,Wang Kexin,Luo Fulai,Zhou Ke,Lv Bohao,Wang Lei
Controlling water and ion transport across nanoconfined channels is essential for natural biological processes and crucial for breakthroughs in diverse scientific and technological fields. Here, we present an efficient voltage-controlled strategy that simultaneously regulates water and ion diffusion by fine-tuning the external voltage applied to a high-conductivity Zr 4 -Ti 3 C 2 T x nanochannel membrane, which demonstrates high structural stability in aqueous environments. Under positive voltage, ion permeation increased by a factor of 10.18, whereas negative voltage reduced it to 0.17 of its original value. Interestingly, water diffusion exhibited the opposite response, with negative voltage enhancing water transport due to the facilitated rotation motion of nanoconfined water with the increased interfacial hydrogen bonding. This distinct voltage-gated transport behavior provides a potential solution to the longstanding trade-off between permeation and selectivity in membrane separation. In desalination trials, applying negative voltage improved ion rejection from 72.09 % to 98.57 % and doubled water permeation. Additionally, in lithium concentration applications, our approach enabled simultaneous improvements in water permeation and Li + rejection. Our findings open promising pathways for advancements in energy, resource, and environmental applications.
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PubMed
高影响因子
ACS Applied Energy Materials
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2025
·
IF 5.5
Yin Zhu,Jiupai Ni,Chengsheng Ni
Cu doping in ferrite perovskites was reported to enhance the low-temperature performance for the oxygen reduction reaction (ORR) of a protonic solid oxide fuel cell (H-SOFC). Zr4+ as a donor for doping in rare-earth-element-free BaFe0.9–xCu0.1ZrxO3−δ (x = 0, 0.05, and 0.1) was studied to achieve a trade-off between the high-performance electrocatalysis and stability of the Cu-containing perovskite. Zr4+ stabilized the cubic structure of the perovskite and inhibited the formation of hexagonal BaFeO3 by decreasing the Goldschmidt tolerance factor of the perovskite. Compared with BaFe0.9Cu0.1O3−δ (Zr0), BaFe0.85Cu0.1Zr0.05O3−δ (Zr5) and BaFe0.8Cu0.1Zr0.1O3−δ (Zr10) exhibit higher electric conductivity and surface exchange kinetics but a lower thermal expansion coefficient. At 600 °C, the cell with Zr10 exhibits a peak power of 547.73 mW cm–2, a polarization resistance of 0.03 Ω cm2, and a chronoamperometry of 673.13 mA cm–2 at 0.6 V after 140 h. Therefore, Zr4+ doping in the ferrite cathode can improve the ORR kinetics and durability of low-temperature H-SOFCs.
研究领域:
材料科学
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能源科学
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电化学
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DOI
高影响因子
OPTICS LETTERS
·
2024
·Vol. 49
·期 8
·1896-1899
·
IF 3.1
Jinxing Zhao,Zhongwei Man,Zhongwei Man,Shuaibing Wang,Chaoqi Hao,Zhenzhen Yu,Xu Li,Xu Li,Aiwei Tang
Next-generation display and lighting based on quantum dot light-emitting diodes (QLEDs) require a balanced electron injection of electron transport layers (ETLs). However, classical ZnO nanoparticles (NPs) as ETLs face inherent defects such as excessive electron injection and positive aging effects, urgently requiring the development of new types of ETL materials. Here, we show that high stability SnO2 NPs as ETL can significantly improve the QLED performance to 100567 cd·m−2 luminance, 14.3% maximum external quantum efficiency, and 13.1 cd·A−1 maximum current efficiency using traditional device structures after optimizing the film thickness and annealing the temperature. Furthermore, experimental tests reveal that by doping Zr4+ ions, the size of SnO2 NPs will reduce, dispersion will improve, and energy level will shift up. As expected, when using Zr-SnO2 NPs as the ETL, the maximum external quantum efficiency can reach 16.6%, which is close to the state-of-the-art QLEDs based on ZnO ETL. This work opens the door for developing novel, to the best of our knowledge, type ETLs for QLEDs.
研究领域:
材料科学
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光电显示技术
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DOI
PubMed
高影响因子
ACS Applied Polymer Materials
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2026
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IF 5.2
Ye Zhang,Zongze Wu,Fangyu Zhao,Yixue Zhang,Yiming Luo,Haoxin Shao,Xiaoqing Zhang,Qianchan Pang,Hongfeng Zhang,Xiaocong Wang
Flexible sensors are essential for human–machine interaction and wearable health monitoring in electronics, healthcare, and robotics. However, traditional conductive hydrogels have poor mechanical strength and are susceptibility to microbial infection, limiting their practical application. Herein, a double-network ion-conductive hydrogel (PMAGZr) is fabricated from polyacrylamide (AM), acrylic acid (AA), gelatin, and zirconium oxychloride (ZrOCl2), serving as both a cross-linker and a functional additive. The hydrogel forms a rigid-flexible network, where AM and AA provide rigidity, gelatin enhances toughness and strength via hydrogen bonding, and Zr4+ improves stability through coordination with carboxyl and acylamino groups. The PMAGZr hydrogel exhibits both excellent mechanical properties (with a toughness of 6.11 MJ·m–3 and a fracture elongation of 720.18%) and significant antibacterial activity, showing inhibition zones of 24.70 mm against Escherichia coli and 43.33 mm against Staphylococcus aureus. The hydrogel-based flexible sensor exhibits rapid response (0.6 s), high sensitivity (GF = 4.03), and a wide strain detection range (0%–300%), enabling accurate human motion monitoring, Morse code visualization, and sustained antibacterial function. This research overcomes the big challenge of balancing mechanical toughness and functional versatility in hydrogels. The material enables precise monitoring of human movement and Morse code communication outdoors while ensuring wearer comfort and safety. It overcomes the main defects of conventional hydrogel sensors, providing an alternative solution for next-generation wearables.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Qi Qi,Xiaodong Li,Jianquan Liang,Kangyi Chen,Mingxuan Zong,Xinghai Li,Li Zhao,Changsong Dai
NASICON structural materials have the advantages of structural stability, high ion conductivity, and high working potential, which have attracted widespread attention as cathode for sodium-ion batteries. Although the three-electron reaction in the NASICON structure Na 3 MnTi(PO 4 ) 3 increases the specific capacity of the material, poor electronic conductivity remains a key factor restricting its practical application. Herein, Na 3 Mn 1-x Zr x Ti(PO 4 ) 3 /C (x = 0, 0.01, 0.03, 0.05, 0.07 and 0.1), a typical three-dimensional NASICON structure cathode material for sodium-ion batteries, was synthesized by the sol-gel method. Through powder X-ray diffraction, the Zr 4+ doping in the Na 3 MnTi(PO 4 ) 3 (NMTP) structure was verified. It was found that doping trace amounts of Zr at the Mn site can not only reduce the Jahn-Teller effect caused by Mn 3+ , but also strengthen the Zr-O bond compared to the Mn-O bond, making the crystal structure more stable by reducing the proportion of Mn. According to the findings of the EIS test, a suitable amount of Zr doping can enhance the electronic conductivity and Na ion diffusion coefficient of NMTP/C electrode materials, weaken polarization phenomena, increase electrode reaction rate, and significantly improve the rate performance and cycling performance of Na 3 Mn 1-x Zr x Ti(PO 4 ) 3 material. The Na 3 Mn 1-x Zr x Ti(PO 4 ) 3 /C sample prepared has high initial capacity of 124mAh/g, a capacity retention rate of 86 % after 200 cycles at 0.2C, and a capacity retention rate of 84 % after 500 cycles at 1C. This proves that the material still exhibits excellent cycling stability and structural stability after high current cycling. More importantly, the Na 3 Mn 0.95 Zr 0.05 Ti(PO 4 ) 3 (Zr5-NMTP)//Hard carbon full battery also exhibits ideal electrochemical performance.
研究领域:
材料科学
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电化学
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储能
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电池技术
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Kewen Shu,Kaifu Yu,Guoquan Ma,Pan He,Meicheng Zhang,Yang Li,Lijian Ma
The coexistence in nature, similar chemical properties, and completely different applications of zirconium (Zr) and hafnium (Hf) make their separation difficult but extremely important. Although solid-phase extraction has shown considerable promise in achieving effective separation of Zr 4+ and Hf 4+ ions, the critical challenge is to develop suitable extractant matrices. Herein, a carbon aerogel with high specific surface area and porosity, derived from covalent organic frameworks was prepared for the first time as an extractant matrix. Subsequently, a phosphonate ligand as the effective functional group was further used to modify the carbon aerogel to prepare the solid-phase extractant. The spectroscopic analysis revealed a tight host-guest interaction between the phosphonate ligand and the carbon aerogel matrix. Impressively, adsorption studies indicated that the phosphonate-functionalized carbon aerogel exhibits Langmuir-type adsorption, affording maximum capacities of 16.8 mg/g for Zr 4+ and 12.0 mg/g for Hf 4+ . Moreover, the Zr 4+ /Hf 4+ separation factor calculated from equilibrium data reached as high as 3.3. Further analysis and theoretical calculation exhibited that the phosphonate in the solid-phase extractant play a decisive role in the adsorption and separation of Zr 4+ and Hf 4+ . Beyond introducing an exceptional solid-phase extractant for Zr 4+ /Hf 4+ separation, this research diversifies the range of potential extractant matrices, thereby creating valuable methodological references for future research.
研究领域:
材料科学
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环境化学
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无机化学
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分离科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Weijia Guo,Yiming Yang,Zhiyu Ma,Yutian Lu,Zhenxing Yue
Microwave dielectric ceramics with high relative permittivity ( ε r ) are commonly used for the miniaturation of microwave devices. The dielectric loss mechanism of microwave dielectric ceramics , as well as the property modification, has been a concerned topic among scholars. Herein, the lattice structure, defects, and broadband dielectric response of Zr 4+ and Hf 4+ substituted Ba 4 Sm 9.33 Ti 18 O 54 (BST) ceramics are systematically examined. The negative temperature coefficient of resonant frequency ( τ f ) of BST ceramics can be tuned to near zero via ion substitution, owing to the Sm 2 Ti 2 O 7 second phase with a large positive τ f . Optimal microwave dielectric properties of ε r = 81.3, Q × f = 10,800 GHz, and τ f = −4.6 ppm/°C are achieved. The lattice vibration behavior and defect concentration are analyzed by Raman spectra and thermally stimulated depolarization currents (TSDC), respectively. The increasing volume of the unit cell and TiO 6 octahedra, which is because of the large-radius substitution ions, leads to an increase in lattice vibration damping factor and the generation of more oxygen vacancies ( V O ∙ ∙ ). Therefore, the dielectric losses in the microwave and terahertz (THz) bands increase after substitution. Meanwhile, the low-frequency dielectric losses at high temperatures also increase due to the weak restraint of carriers by the lattice. The broadband loss mechanism of Zr 4+ and Hf 4+ substituted BST ceramics related to lattice vibration and defects might be referenced for developing low-loss dielectric ceramics.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
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