IONICS
·
2019
·Vol. 26
·期 2
·627-637
·
IF 2.289
Zhai Huanhuan,Shuai Yi,Wang Yu,Chen Kanghua
As a negative electrode material, the main drawbacks of Li 4 Ti 5 O 12 (LTO) are its low electric conductivity and poor Li-ion diffusion coefficient. Fortunately, elements modification to address these problems is an effective method. Herein, we firstly report Ni and F co-modified LTO material which is synthesized via a solid-state reaction. Powder X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy were conducted to investigate the structure and morphology. Afterwards, we surprisingly find that Ni and F co-modification can reduce the overall charge transfer resistance of LTO for part of Ti 4+ converts into Ti 3+ and Ni 2+ ions supply the charge carriers. When test in battery, a superior discharge capacity of 236.1 mAh g −1 at 0.036 A g −1 is obtained, much higher than that of pristine LTO (196.9 mAh g −1 ). Furthermore, it still retains a discharge capacity of 174.6 mAh g −1 after 200 cycles at 0.18 A g −1 and exhibits an excellent rate performance.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固体化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2014
·Vol. 26
·期 2
·884-890
·
IF 1.966
Li Rui,Wang Yan-ze,Mao Zhi-yong,Wang Da-Jian
A remote phosphor coating by using Sr 3 (Al,Si)(O, F) 5 :Ce 3+ (SASF:Ce 3+ ) on glass substrate was prepared by a simple and convenient screen printing method. The crystalline phase and the distribution of SASF:Ce 3+ crystals in coating were investigated by XRD and SEM, respectively. The scattering light and absorption light properties of remote phosphor coating with different thicknesses were discussed through Lambert–Beer’s law. The relationship between luminous efficiency and absorption coefficient was demonstrated. White light emitting diode prototype fabricated with blue chip and the prepared patterned SASF:Ce 3+ remote phosphor in this work showed excellent performances, opening a cost-effective process to generate planar white light.
研究领域:
材料科学
·
光学工程
·
发光材料
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固态照明
·
功能涂层
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2018
·
IF 4.7
Meiying Qie,Jian Lin,Fang Kong,Mark A. Silver,Zenghui Yue,Xiaomei Wang,Linjuan Zhang,Hongliang Bao,Thomas E. Albrecht-Schmitt,Jian-Qiang Wang
The exploration of phase formation in the f-element-bearing iodate selenate system has resulted in 14 novel rare-earth-containing iodate selenates, Ln(IO3)(SeO4) (Ln = La, Ce, Pr, Nd; LnISeO-1), Ln(IO3)(SeO4)(H2O) (Ln = Sm, Eu; LnISeO-2), and Ln(IO3)(SeO4)(H2O)2·H2O (Ln = Gd, Dy, Ho, Er, Tm, Yb, Lu, Y; LnISeO-3), as well as two new thorium iodate selenates, Th(OH)(IO3)(SeO4)(H2O) (ThISeO-1) and Th(IO3)2(SeO4) (ThISeO-2). LnISeO-3 and ThISeO-2 crystallize in the chiral space group P212121, while LnISeO-1, LnISeO-2, and ThISeO-1 crystallize in the centrosymmetric space group P21/c. The numbers of both coordinating and hydrating water molecules crystallized in LnISeO-1, LnISeO-2, and LnISeO-3 increase along these three series, in line with the increasingly negative values of hydration enthalpies of heavier trivalent lanthanide ions. Such a systematic change in compositions, especially the first coordination sphere of Ln, further induces structural rearrangements, including coordination number and dimensional reductions. More specifically, the structures of LnISeO-1, LnISeO-2, and LnISeO-3 have undergone transitions from 2D Ln–oxo layers with 10-coordinate Ln centers to 1D Ln–oxo chains with 9-coordinate Ln centers and then to 0D Ln–oxo monomers with 8-coordinate Ln centers, respectively. The formation and characterization of this large family of Ln/Th iodate selenates suggest that such a mixed-anion system not only exhibits richer structural chemistry but also can be capable of generating intriguing properties, such as the second-harmonic generation (SHG) effect.
研究领域:
无机化学
·
材料科学
·
固态化学
·
晶体工程
·
非线性光学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2024
·
IF 3.3
Yuda Lin,Yiheng Chen,Ye Fan,Shenghui Zheng,Liting Qiu
With the aim of improving the intrinsic conductivity of Nb2O5, we synthesized fluorine-doped Nb2O5 with rich oxygen vacancies anchored on the N/F carbon skeleton (F–Nb2O5@NFC) by a one-step annealing method. In this structure, F-doping greatly improves the intrinsic conductivity of Nb2O5, and the theoretical calculation results show that F–Nb2O5 has surprisingly zero band gap metal characteristics. At the same time, due to F-doping, a large number of oxygen vacancies are introduced into the structure, which increases the concentration of free electrons and further enhances the conductivity of the composites. In addition, the N/F codoped carbon skeleton ensures the rapid transmission of electrons. Under the blessing of multilevel conduction, F–Nb2O5@NFC exhibits excellent electrochemical performance, with a reversible specific capacity of 130 mAh g–1 after 1400 cycles at a current density of 3 A g–1, and the rate capacity reaches 110 mAh g–1 at a high current density of 10 A g–1.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Yan Chen,Chunli Hu,Zhi Fang,Yilin Li,Jianggao Mao
Birefringent materials capable of modulating the polarization of light have attracted intensive studies because of their wide utilization in optical communication and the laser industry. Herein, two new lead(II)-based cyanurates, namely, Pb(H2C3N3O3)X (X = OH, F), were synthesized by hydrothermal methods, and the first halogen-containing metal cyanurate Pb(H2C3N3O3)F was successfully obtained by the rational substitution of a homovalent anion. Pb(H2C3N3O3)X (X = OH, F) belong to space group P1̅, and their structures display a neutral [Pb(H2C3N3O3)X] (X = OH, F) layer. The Pb2+ ions in Pb(H2C3N3O3)(OH) are interconnected by hydroxyl groups and oxygen atoms of cyanurate anions into a 1D [PbO(OH)]− chain, whereas the Pb2+ ions in Pb(H2C3N3O3)F are interconnected by F– anions and oxygen atoms of cyanurate anions into a 2D [PbOF]− layer. The π–π interactions between adjacent hydroisocyanurate rings and the hydrogen bonds between neighboring neutral layers provide additional stability to the structures. Luminescent studies show that Pb(H2C3N3O3)(OH) and Pb(H2C3N3O3)F emit yellow-green and blue light, respectively. Theoretical calculations unveiled their birefringences of 0.079 and 0.203@1064 nm and their band gaps of 3.96 and 4.96 eV, respectively, for OH– and F– containing materials. Obviously, the substitution of OH– by F– with the largest electronegativity can simultaneously improve both the birefringence and band gap.
研究领域:
材料科学
·
光学材料
·
无机化学
·
固态化学
✓ 已验证
DOI
高影响因子
Frontiers in Microbiology
·
2022
·
IF 6.064
Le Su,Feifan Ma,Zaiyong An,Xiuyu Ji,Ping Zhang,Qiulin Yue,Chen Zhao,Xin Sun,Kunlun Li,Baojun Li,Xinli Liu,Lin Zhao
Because of the increased incidence and prevalence, ulcerative colitis (UC) has become a global health issue in the world. Current therapies for UC are not totally effective which result in persistent and recurrent symptom of many patients. Lactobacillus with anti-inflammatory effects might be beneficial to the prevention or treatment for UC. Here, we examined the ameliorative effects of the metabolites of Lactobacillus fermentum F-B9-1 (MLF) in Caco-2 cells and dextran sodium sulfate (DSS)-induced UC model mice. MLF displayed intestinal barrier-protective activities in Caco-2 cells by increasing the expression of Occludin and ZO-1. They also showed anti-inflammatory potential in interleukin (IL)-1β and IL-6. In order to further examine the in vivo anti-inflammatory effect of MLF, the MLF was gavaged in the DSS-induced UC model mice. The intragastric administration of MLF effectively alleviated colitis symptoms of weight loss, diarrhea, colon shortening, and histopathological scores, protected intestinal barrier function by increasing Occludin and ZO-1, and attenuated colonic and systemic inflammation by suppressing production of IL-1β and IL-6. Finally, the use of MLF remodeled the diversity of the gut microbiota and increased the number of beneficial microorganisms. Overall, the results demonstrated that MLF relieved DSS-induced UC in mice. And MLF might be an effective therapy method to UC in the clinic in the future.
研究领域:
胃肠病学
·
微生物学
·
免疫学
·
药理学
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Penglin Kang,Jinbo Guo,Xiaojuan Fu,Yuan Lai,Xiangru Li,Leixin Hou,Wenjie Liu,Xiaodong Li
To achieve high-energy composites with both high energy density and enhanced safety, TiH 2 /HMX/F energetic microspheres were fabricated using a coaxial flow-focusing microdroplet technique. The effects of varying TiH 2 contents on the chemical structure, thermal decomposition, mechanical sensitivity, combustion characteristics, and combustion products were systematically examined. The results show that the microspheres exhibit a dense structure, narrow particle-size distribution, and uniform component dispersion, while retaining the crystalline form and chemical structure of the raw HMX and TiH 2 . With increasing TiH 2 content (5, 10, 15, and 20 wt%), the apparent activation energy rises by 21.58, 66.35, 98.33, and 146.09 kJ mol −1 , respectively, compared with the H/F sample, indicating reduced reactivity but significantly improved thermal stability. At 10 wt% TiH 2 , the critical impact energy and friction force increase by 4.0 J and 164.0 N, respectively, demonstrating enhanced mechanical safety. Combustion tests reveal that TiH 2 not only strengthens combustion intensity but also prolongs the reaction duration. When the TiH 2 content exceeds 5 wt%, oxidation becomes more complete, with TiO 2 and TiN identified as the main products. In addition, the combustion mechanism was clarified, highlighting the role of TiH 2 in promoting high-temperature oxidation and improving combustion completeness. These findings provide both theoretical insights and process guidance for optimizing the performance and safety of high-energy composite materials.
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 36
·18616-18625
·
IF 14.511
Xiukun Liu,Xu Xu,Fangjia Zhang,Xiangchao Ge,Haifeng Ji,Yuqi Li,Shaorong Lu,Zhen Wen
A sustainable, reliable and self-powered anti-corrosion method for metallic structures is key to improving the operation stability and service life of equipment. In this work, a series of durable superhydrophobic fluorinated silica (F-SiO2)/epoxy resin (FE) coatings with good corrosion resistance were prepared via a simple spraying method, which were further used to fabricate a FE based triboelectric nanogenerator (FE-TENG). A synergistic anti-corrosion system for self-powered cathodic protection constructed using the superhydrophobic FE coating and a water wave-driven FE-TENG was then proposed. In a 3.5 wt% NaCl solution, the corrosion potential (Ecorr) of an aluminum (Al) sheet protected by the FE-TENG self-powered cathodic protection was slightly decreased by 80 mV. However, when the Al sheet was coated with a FE superhydrophobic coating, the Ecorr was significantly reduced by 460 mV under FE-TENG protection. Notably, the Ecorr of 304 stainless steel protected by the synergistic anti-corrosion system was dramatically decreased by ∼745 mV. Furthermore, an application in marine corrosion protection was demonstrated by using a float-like spherical FE-TENG. This work demonstrates a cost-effective and large-scale strategy for preparing a superhydrophobic FE coating, using which a self-powered synergistic anti-corrosion system is built for effectively protecting metals from corrosion.
研究领域:
材料科学
·
腐蚀与防护
·
纳米能源
·
表面工程
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Anjun Hu,Wei Chen,Yu Pan,Jun Zhu,Yinuo Li,Hui Yang,Runjing Li,Baihai Li,Yin Hu,Dongjiang Chen,Fei Li,Jianping Long,Chaoyi Yan,Tianyu Lei
The practical application of lithium metal batteries is considered to be one of the most promising successors for lithium-ion batteries due to their ability to meet the high-energy storage demands of modern society. However, their application is still hindered by the unstable solid electrolyte interphase (SEI) and uncontrollable dendrite growth. In this study, we propose a robust composite SEI (C-SEI) that consists of a fluorine doped boron nitride (F-BN) inner layer and an organic polyvinyl alcohol (PVA) outer layer. Both theoretical calculations and experimental results demonstrate that the F-BN inner layer induces the formation of favourable components (LiF and Li 3 N) at the interface, promoting rapid ionic transport and inhibiting electrolyte decomposition. The PVA outer layer acts as a flexible buffer in the C-SEI, ensuring the structural integrity of the inorganic inner layer during lithium plating and stripping. The C-SEI modified lithium anode shows a dendrite-free performance and stable cycle over 1200 h, with an ultralow overpotential (15 mV) at 1 mA cm −2 in this study. This novel approach also enhances the stability of capacity retention rate by 62.3% after 100 cycles even in anode-free full cells (C-SEI@Cu||LFP). Our findings suggest a feasible strategy for addressing the instability inherent in SEI, showing great prospects for the practical application of lithium metal batteries.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2023
·Vol. 13
·期 12
·2203168
·
IF 27.8
Yifan Yu,Meng Lei,Decheng Li,Chilin Li
Solid-state fluoride ion batteries (SSFIBs) are anion-shuttle-driven and alkali-metal-free emerging energy storage systems, and have the advantages of low cost, high safety, and energy density. However, the current major challenges of SSFIBs or quasi-SSFIBs are the lack of high-conductivity fluoride electrolytes and the difficulty of mild-temperature operation of full cells. Here, a 2D fluoride conductor (KSn 2 F 5 ) synthesized by mechanochemical method is employed as the compatible solid electrolyte with a high F-ion conductivity of 10 −4 S cm −1 at 60 °C. The high concentration and frequent hopping of charge carriers in F-vacancy-rich KSn 2 F 5 contribute to the higher ionic conductivity compared to most reported fluoride structures. Integrating this layered electrolyte with high-voltage CuF 2 cathode and Sn/SnF 2 anode, a highly reversible cycling of conversion-type quasi-SSFIBs with a discharge capacity of 150 mAh g −1 for at least 70 cycles at 60 °C is achieved. The interface engineering aided by tetra- n -butylammonium fluoride salt facilitates the F-ion transfer between cathode and electrolyte and fluorination/defluorination conversion mechanism of CuF 2 cathode with optimized multiphase and nanodomain distributions.
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产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2023
·
IF 6
Yan Zhu,Yuanyuan Yao,Jinfeng Xi,Caiguo Tang,Lifang Wu
Fusarium graminearum ( F. graminearum ) is a vital pathogen of Fusarium head blight (FHB). Hydrogen sulfide (H 2 S), which can be induced by stress in plants as a fungal inhibitor, affects the germination of spores through the detection of environmental factors such as temperature and pH. Based on mathematical models, F. graminearum was treated with different temperatures, pH, and H 2 S concentration to investigate spore germination events. This paper considered the synergistic effects of temperature and pH on spores in order to determine the optimal germination environment. Under these circumstances, the inhibition of spore germination with different concentrations of H 2 S was quantified. The results suggested that the germination time negatively correlates with the germinating rate. An increase in temperature altered the weak alkali preference of F. graminearum spores. At 28 °C, spores were more sensitive to the changes in pH. H 2 S gas could delay the germinating process significantly, however the required H 2 S concentration varied with environmental changes. This paper provides a perspective on the synergistic effect of temperature and pH on spore germination and contributes to determining the concentration of H 2 S as a management of FHB.
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 11
·2213961
·
IF 19
Linghui Zhang,Chao Fu,Shi Wang,Minhuan Wang,Ruiting Wang,Shengling Xiang,Zhiyong Wang,Jing Liu,Hongru Ma,Yudi Wang,Ying Yan,Min Chen,Lei Shi,Qingshun Dong,Jiming Bian,Yantao Shi
Flexible perovskite solar cells (f-PSCs) show great promise in portable-power applications (e.g., chargers, drones) and low-cost, scalable productions (e.g., roll-to-roll). However, in conventional n–i–p architecture f-PSCs, the low-temperature processed metal oxide electron transport layers (ETLs) usually suffer from high resistance and severe defects that limit the power conversion efficiency (PCE) improvement of f-PSCs. Besides the enhancement in the mobility of metal oxide and passivation for perovskite/ETL interfacial defects reported in previous literature, herein, the electron transport loss between the metal oxide nanocrystallines within the ETL is studied by introducing an amorphous F-doped TiO x (F-TiO x ) caulked crystalline SnO 2 composite ETL. The F-TiO x in this novel composite ETL acts as an interstitial medium between adjacent SnO 2 nanocrystallines, which can provide more electron transport channels, effectively passivate oxygen vacancies, and optimize the energy level arrangement, thus significantly enhancing the electron mobility of ETL and reducing the charge transport losses. The composite ETL-based f-PSCs achieve a high PCE of 22.70% and good operational stability. Furthermore, a moderate roughness of the composite ETL endows f-PSCs with superior mechanical reliability by virtue of a strong coupling at the ETL/perovskite interface, by which the f-PSCs can maintain 82.11% of their initial PCE after 4000 bending cycles.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）