Materials Chemistry Frontiers
·
2020
·Vol. 5
·期 1
·333-340
·
IF 6.788
Zhizhen Wang,Zhen Song,Quanlin Liu
Persistent luminescent materials are widely used as night-vision and marking materials in various important fields. Although significant achievements have been made in blue and green persistent luminescent (PersL) materials, the research and development of PersL materials in the warm-color region (550–660 nm) are relatively lacking. Only the orange PersL phosphor Y2O2S:Eu3+,Mg2+,Ti4+ (∼610 nm) and deep red PersL phosphor (Ca1−xSrx)S:Eu2+,Tm3+ (∼650 nm) fulfill the demands of commercial applications. However, sulfide phosphors have poor chemical stability and a relatively short persistent duration time. Herein, we report a series of orange PersL materials, (Sr1−xBax)3SiO5:Eu2+,Nb5+, which exhibit a strong PersL emission band at 550–670 nm and a super-long persistent time of more than 20 h at the 0.32 mcd m−2 threshold value after UV radiation. These new orange PersL materials are compared to the commercial warm-color sulfide PersL phosphor, Y2O2S:Eu,Mg,Ti, with regards to PersL time and brightness, and it is determined that they would have great potential applications.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Chao Yang,Shu Yu,Yu Ma,Chunfu Lin,Zhihao Xu,Hua Zhao,Shunqing Wu,Peng Zheng,Zi-Zhong Zhu,Jianbao Li,Ning Wang
Ti 2 Nb 10 O 29 is an advanced anode material for lithium-ion batteries due to its large specific capacity and high safety. However, its poor electronic/ionic conductivity significantly limits its rate capability. To tackle this issue, a Cr 3+ –Nb 5+ co-doping is employed, and a series of Cr x Ti 2–2 x Nb 10+ x O 29 compounds are prepared. The co-doping does not change the Wadsley–Roth shear structure but increases the unit-cell volume and decreases the particle size. Due to the increased unit-cell volumes, the co-doped samples show increased Li + -ion diffusion coefficients . Experimental data and first-principle calculations reveal significantly increased electronic conductivities arising from the formation of impurity bands after the co-doping. The improvements of the electronic/ionic conductivities and the smaller particle sizes in the co-doped samples significantly contribute to improving their electrochemical properties . During the first cycle at 0.1 C, the optimized Cr 0.6 Ti 0.8 Nb 10.6 O 29 sample delivers a large reversible capacity of 322 mAh g −1 with a large first-cycle Coulombic efficiency of 94.7%. At 10 C, it retains a large capacity of 206 mAh g −1 , while that of Ti 2 Nb 10 O 29 is only 80 mAh g −1 . Furthermore, Cr 0.6 Ti 0.8 Nb 10.6 O 29 shows high cyclic stability as demonstrated in over 500 cycles at 10 C with tiny capacity loss of only 0.01% per cycle.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 106
·期 2
·1413-1423
·
IF 4.186
Yameng Zhu,Jinpeng Zhu,Hailong Wang,Kaijun Yang,Mingliang Li,Jilin He
Thermal protection materials with high optical reflectivity, low thermal conductivity, and good high-temperature stability are required for the development of laser technologies and the protection of the critical equipment components. Herein, we synthesize a novel thermal protective material, La 0.9 Sr 0.1 Ti 1− x Nb x O 3+ δ (LSTN; x = 0.1, 0.125, 0.15), with different Nb 5+ -ion contents using solid-state sintering. Phase structure analysis demonstrates that LSTN ( x = 0.1, 0.125, 0.15) presents a single-phase monoclinic structure with a uniform element distribution. In particular, the LSTN 0.125 ceramic exhibits ultrahigh optical reflectivity (96%, 2300 nm) and excellent thermophysical properties, such as a high thermal expansion coefficient (10.3 × 10 −6 K −1 , 1000°C), an ultralow thermal conductivity (0.408 W (m K) −1 , 300°C), and excellent high-temperature stability. Aberration-corrected scanning transmission electron microscopy reveals that the disordered substitution of Nb 5+ ions induces numerous lattice distortions and mass fluctuations, which decrease the thermal conductivity, and makes difference in the relative refractive indices of atomic layers causing the high reflectivity of the material. These remarkable properties render the LSTN 0.125 ceramic as an ideal alternative for near-infrared thermal protection applications.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Haoshan Wei,Zhongxin Huang,Jiewu Cui,Pengjie Zhang,Song Ma,Wei Sun,Xiaohui Liang,Yong Zhang,Yucheng Wu
M-type barium ferrites (Ba 1−x Nd x Fe 12−x M x O 19 , x = 0–0.3) with Nd 3+ –M 5+ (M = Nb 5+ and Ta 5+ ) ions substituting Ba 2+ and Fe 3+ ions were prepared via a solid-state reaction. The crystalline phases, microstructure, magnetic properties , and electromagnetic wave absorption of the ion-substituted M-type barium ferrites were investigated. The saturation magnetization strength and coercivity changed with increasing substitution ratio x. The substitution of Nd–Nb and Nd–Ta ions reduced the anisotropic field of the material, thus lowering the natural resonant frequency. The complex permittivity of the ion-substituted samples was enhanced compared with that of the unsubstituted samples. Interfacial polarization, dipole polarization and dipole relaxation were induced by the substituted ions. The multiple natural resonances contributed by the numerous g-factors generated by Fe 3+ ions and the exchange coupling among Fe 3+ , Fe 2+ , and O 2− ions controlled the permeability of M-type barium ferrite, which broadened the effective absorption bandwidth. The excellent complex permittivity and complex permeability enabled the substituted samples to attain high attenuation constants and better impedance-matching properties. Hence, a strong reflection loss of (−35)–(−50) dB, an ultrabroad bandwidth of ∼13.5 GHz, and a low matching thickness of < 0.75 mm were obtained in the frequency range of 26.5–40 GHz. The electromagnetic wave absorption was also improved in the frequency range of 2–18 GHz, where the samples with the substitution ratio of x = 0.1 exhibited relatively good performance with small matching thickness (<1.5 mm). Thereby, Nd–Nb and Nd–Ta substituted M-type barium ferrites are prospective candidates that can be used as an excellent microwave absorber material in the centimeter and millimeter wavelength frequency range.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Jin Feng,Rongxia Huang,Zhihao Liang,Zuchao Du,Yejing Dai,Jianbo Wu,Hua-Tay Lin
This research explored the influence of Nb 5+ doping on the electrical properties and microstructure of [0.852(Bi 0.5 Na 0.5 )-0.11(Bi 0.5 K 0.5 )-0.038Ba]Ti (1- x ) Nb x O 3 (designated as BNKT-BT). The BNKT-BT samples were fabricated and the XRD results showed that the doping of Nb 5+ ions induced a transformation from the coexistence of both rhombohedral and tetragonal phase to a single pseudo cubic phase. Also, the doping of Nb 5+ ions caused the temperature of ferroelectric state-ergodic relaxor state transition to decrease below the room temperature (RT). The SEM observations showed that the Nb 5+ doping had a minor effect on the grain size of BNKT-BT samples. In addition, the samples achieved a large electrostrain of 0.43% ( d * 33 = S max / E max = 614 pm/V) under 7 kV/mm at RT. Moreover, the aging process employed at 80 °C for two weeks in air could effectively increase the electrostrain from 0.38% to 0.41% under 6 kV/mm ( d * 33 = 683 pm/V) and reduce the strain hysteresis from 57% to 34%. These results indicated that the B site doping, combined with the aging process, could provide an effective way to enhance the electrostrain performance of lead-free piezoelectric ceramics.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yan Yang,Jie Li,Huaiwu Zhang,Jun Li,Fang Xu,Gang Wang,Feng Gao,Haokai Su
Nowadays, developing nickle zinc ferrites with excellent magnetic and gyromagnetic properties are of great importance for solving the matching problem of 5G communication system. However, much is discussed about soft magnetic properties , but little is reported gyromagnetic properties that is critical for microwave device applications. Herein, Nb 5+ ions substituted Ni 0.29 Cu 0.18 Zn 0.53 Nb x Fe 2-x O 4 (x = 0.00-0.05), possessing high saturation magnetization, approriate initial permeability, high cut-off frequency and low ferromagnetic resonance linewidth (@9.55 GHz), were synthesized by low-temperature firing (900 °C). The phase structure and morphology evolutions were studied in detail. The results of morphology observations revealed that Nb 5+ substitution has significant role in determining produce compact and uniform microstructures of NiCuZn ferrites via suppress the grain growth, which further corresponding enhance the magnetic and gyromagnetic properties. As a result, a uniform and compact grain size can be obtained, corresponding to the change of magnetic and gyromagenetic properties have different trends. Enhanced magnetic and gyromagnetic performance including high initial permeability (μ' = 203 @1 MHz), saturation magnetization (4π M s = 3966 Gauss) and low ferromagnetic resonance linewidth (Δ H = 203 Oe) of the NiCuZn ferrites is achieved though adjusting Nb 5+ ions substitution. More importantly, this work not only for low temperature co-fired ceramic (LTCC) technology but also for high frequency and microwave frequency devices including phase shifter and radars.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Nano Energy
·
2020
·
IF 16.602
Jian Qin,Hirbod Maleki Kheimeh Sari,Xiujuan Wang,Huijuan Yang,Jiujun Zhang,Xifei Li
Due to the different energy storage mechanisms, anode electrodes have been challenging to match cathode ones in sodium-ion hybrid supercapacitors (Na–HSCs), resulting in low energy and power densities of the device. As a result, engineering anode materials with excellent electrochemical performance has aroused a great deal of interest. In this work, metal oxides (Mn 2+ /Nb 5+ ) embedded into interconnected hollow carbon nanoboxes (MnO@HCNb and NaNbO 3 @HCNb) are fabricated by a simple template-assisted CVD method. Such a unique structure provides shortened solid-state transportation pathway and sufficient adsorption sites for Na + , with differing energy storage mechanisms from traditional Faradic reaction. Benefiting from it, the MnO@HCNb electrode exhibits an outstanding rate performance and an ultra-long lifespan of more than 10,000 cycles with 88.6% of capacity retention, which is rarely reported for oxide-based anodes. Moreover, energy storage mechanism of the composite and the important role of Mn/Na 2 O interface generated inside the core (MnO) - shell (C) structure during conversion reaction have been revealed. Hybrid ion storage mechanisms (adsorption, Faradic reaction and intercalation) are proposed with desirable compatibility, exhibiting uniform capacitive electrochemical behavior. Coupling with activated carbon cathode, a full cell of Na-HSC demonstrates a high energy density of 116 Wh kg −1 at 99 W kg −1 and 56.4 Wh kg −1 at 1.8 kW kg −1 . Indeed, this work is inspiring to other researchers to further improve the electrochemical performance of anode materials by adjusting their energy storage mechanisms through structural reconstruction.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Interdisciplinary Materials
·
2025
·Vol. 4
·期 6
·914-926
·
IF 31.6
Wanqing Ren,Yang Li,Xingyi Peng,Meng Wu,Xiang Qi,Peng Lei,Changyi Fan,Ce-Wen Nan,Li-Zhen Fan
Zirconium-based halide electrolytes were created as prospective candidates for all-solid-state lithium batteries (ASSLBs) because of their low cost, wide electrochemical window, and superior compatibility with oxide cathodes. However, practical implementation is hindered by limitations such as suboptimal room-temperature (RT) ionic conductivity (< 1 mS cm −1 ) and poor interfacial compatibility with lithium metal. Herein, we report a new class of zirconium-based chlorides, Li 2− x Zr 1− x Nb x Cl 6 , synthesized by a high-valent Nb 5+ doping method. The introduction of Nb 5+ induces local lattice decrease, which simultaneously weakens the binding intensity of Li─Zr and optimizes ion migration pathways and defect concentrations. Therefore, the optimal composition, Li 1.75 Zr 0.75 Nb 0.25 Cl 6 (denoted as LZC-Nb), achieves a high RT ionic conductivity of 1.82 mS cm −1 and exceptional moisture resistance. Furthermore, the dynamic interfacial modulation of LZC-Nb forms a low-impedance passivation layer, enhancing Li + transport kinetics. This improvement in interfacial stability enables symmetric batteries to exceed a critical current density of 1.3 mA cm −2 . Combined with a LiNi 0.8 Mn 0.1 Co 0.1 O 2 cathode, the resultant ASSLB retains 81.8% of its initial capacity (157.5 mAh g −1 ) after 600 cycles at 0.3 C. This study provides a proven strategy for developing inorganic ionic conductors with superior ionic transport and interfacial compatibility, offering a viable pathway toward high-performance ASSLBs.
研究领域:
材料科学
·
电化学
·
储能
·
固体离子学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2017
·
IF 4.162
Jiebing Jiang,Xueni Sun,Yan Li,Chunhui Deng,Gengli Duan
Metal ions differed greatly in affinity towards phosphopeptides, and thus it is essential to systematically compare the phosphopeptides enrichment ability of different metal ions usually used in the IMAC techniques. In this work, for the first time, eight metal ions, including Nb 5+ , Ti 4+ , Zr 4+ , Ga 3+ , Y 3+ , In 3+ , Ce 4+ , Fe 3+ , were immobilized on the polydopamine (PDA)-coated Fe 3 O 4 (denoted as Fe 3 O 4 @PDA-M n+ ), and systematically compared by the real biosamples, in addition to standard phosphopeptides. Fe 3 O 4 microspheres were synthesized via the solvothermal reaction, followed by self-polymerization of dopamine on the surface. Then through taking advantage of the hydroxyl and amino group of PDA, the eight metal ions were easily adhered to the surface of Fe 3 O 4 @PDA. After characterization, the resultant Fe 3 O 4 @PDA-M n+ microspheres were applied to phosphopeptides enrichment based on the binding affinity between metal ions and phosphopeptides. According to the results, different metal ions presented diverse phosphopeptides enrichment efficiency in terms of selectivity, sensitivity and the enrichment ability from real complex samples, and Fe 3 O 4 @PDA-Nb 5+ and Fe 3 O 4 @PDA-Ti 4+ showed obvious advantages of the phosphopeptides enrichment effect after the comparison. This systematic comparison may provide certain reference for the use and development of IMAC materials in the future.
研究领域:
生物化学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Fu-Jie Zhao,Lei Xian,Bo Li,Ling-Bin Kong
Li 2 ZrCl 6 has emerged as a promising candidate material due to its notable cost-effectiveness compared to other complex halide superionic conductors. However, its relatively low ionic conductivity at room temperature remains a significant obstacle in practical applications. Doping serves as a prevalent strategy to enhance ion transport capabilities by modulating the lattice structure. In this work, Li 2-x Zr 1-x Nb x Cl 6 electrolyte is synthesized by doping Nb 5+ into Li 2 ZrCl 6 . Nb 5+ doping enhances Li + transport dynamics through a dual mechanism involving vacancies and structural modifications. The ionic conductivity of the modified Li 1.85 Zr 0.85 Nb 0.15 Cl 6 reaches 0.70 mS·cm −1 at room temperature, more than doubling that of Li 2 ZrCl 6 . Furthermore, the electrochemical performance of an all-solid-state battery utilizing Li 1.85 Zr 0.85 Nb 0.15 Cl 6 electrolyte paired with NCM811 cathode is evaluated. The results demonstrate that Nb 5+ doping significantly enhances the specific discharge capacity and cycle stability of Li 2 ZrCl 6 . These findings provide valuable insights into enhancing the ionic conductivity of zirconium-based solid electrolyte systems through the doping of high-valence ions.
研究领域:
材料科学
·
储能技术
·
固体离子学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yihan Tang,Shuaishuai Chen,Ming Wan,Hua Li,Qingliang You,Zhenlian Chen,Zhe Peng,Deyu Wang
Ni-rich layer-structured materials are some of the most promising cathodes owing to their attractive reversible capacity and cost-effectiveness. When the Ni content is increased to 90% and higher, mechanical deterioration becomes serious and leads to accelerated cyclic degradation, since removable Li+ is ∼0.85, accompanied by large lattice variation during operation. Here, we investigate the influences of Ti4+ bulky substitution, Nb5+ surface treatment, and their coutilization on the behavior of LiNi0.925Co0.065Mn0.01O2 (NCM92). In contrast to the limited positive effects of monousage, the coutilization of Ti4+ and Nb5+ obviously suppresses particles’ pulverization, relying on their synergistic effects of the shape of lattice variation and the protection of a tough shell layer. As a result, Ti & Nb-LiNi0.925Co0.065Mn0.01O2 (TiNb-NCM92) presents the best capacity retention, as high as 90.2% after 300 cycles, much higher than NCM92 (49.0%), Ti-NCM92 (76.3%), and Nb-NCM92 (72.4%). Our approaches demonstrate that the serious mechanical challenges of ultrahigh nickel cathodes could be alleviated by various remedies coutilized together.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 2
·1-11
·
IF 5.833
Liu Bin,Wang Baichun,Yan Yinghua,Tang Keqi,Ding Chuan-Fan
A strategy for effectively enriching global phosphopeptides was successfully developed by using ammonia methyl phosphate (APA) as a novel chelating ligand and Ti 4+ and Nb 5+ as double functional ions (referred to as Fe 3 O 4 @mSiO 2 @APA@Ti 4+ /Nb 5+ ). With the advantage of large specific surface area (151.1 m 2 /g), preeminent immobilized ability for metal ions (about 8% of total atoms), and unbiased enrichment towards phosphopeptides, Fe 3 O 4 @mSiO 2 @APA@Ti 4+ /Nb 5+ displays high selectivity (maximum mass ratio β-casein to BSA is 1:1500), low limit of detection (LOD, as low as 0.05 fmol), good relative standard deviation (RSD, lower than 7%), recovery rate of 87% ( 18 O isotope labeling method), outstanding phosphopeptide loading capacity (330 μg/mg), and at least five times re-use abilities. In the examination of the actual sample, 24 phosphopeptides were successfully detected in saliva and 4 phosphopeptides were also selectively extracted from human serum. All experiments have shown that Fe 3 O 4 @mSiO 2 @APA@Ti 4+ /Nb 5+ exhibits exciting potential in view of the challenge of low abundance of phosphopeptides.
Graphical abstract
研究领域:
生物化学
·
蛋白质组学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）