JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Liangmao Liu,Hong Zhang,Zhicheng Li
● Strong Lewis acidic AlF 3 nanoparticles were synthesized and incorporated into PVDF-based electrolyte. ● AlF 3 anchors TFSI - and suppresses crystallinity to facilitate rapid Li + flux. ● AlF 3 modified electrolyte achieves high ionic conductivity of 3.10 × 10 −4 S cm −1 . ● Enables stable Li||Li cell cycling over 3300 h and robust NCM811 full cells. Solid-state lithium-metal batteries (LMBs) are promising for high-energy-density storage, yet their practical application is hindered by low ionic conductivity of electrolyte, poor interfacial compatibility and lithium dendrite growth. The poly(vinylidene fluoride) (PVDF) based solid state electrolytes enhanced by inorganic fillers have attracted much attention for the development and application of LMBs. In this work, a high-performance PVDF based composite electrolyte is developed by incorporating Lewis acidic AlF 3 nanoparticles. The AlF 3 fillers reduce polymer crystallinity and anchor TFSI - anions via Lewis acid-base interactions, facilitating rapid Li + transport. This enables a superior ionic conductivity of 3.10 × 10 −4 S cm −1 and an enhanced lithium-ion transference number of 0.302 at 25 °C. At the electrode interface, the Lewis acidity of the AlF 3 fillers inhibits uncontrolled electrolyte decomposition, promoting the formation of a dense and inorganic-rich solid electrolyte interphase. These improvements allow Li||Li symmetric cells to achieve a high critical current density of 1.4 mA cm −2 and an ultra-long cycling life exceeding 3300 h. Furthermore, the assembled NCM811||Li full cells demonstrate excellent electrochemical stability, maintaining a discharge capacity of 176.2 mAh g −1 at 0.5 C and 25 °C after 300 electrochemistry cycles. This study underscores the strategic role of Lewis acidic fillers in optimizing transport kinetics and interfacial chemistry for advanced solid-state batteries.
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Journal of Materials Chemistry C
·
2025
·Vol. 13
·期 47
·23612-23619
·
IF 5.1
Wenqiang Li,Qihao Li,Yuehua Chen,Cailing Liu,Wenjing Zhong,Xiang Zhang,Yayun Zhou,Tingting Deng,Jiantao Lü,Ting Fan
Near-infrared phosphor-converted light-emitting diodes (pc-LEDs), as the core light source for smart broadband near-infrared spectroscopy, face critical challenges in balancing luminous efficiency and thermal stability. Herein, we report a Cr3+-doped fluoride phosphor AlF3:Cr3+ with efficient broadband near-infrared (NIR) emission. Under blue-light excitation, AlF3:Cr3+ exhibits a broadband NIR emission centered at 749 nm with a full width at half maximum (FWHM) of 87 nm. Notably, it shows excellent thermal stability, retaining 86.28% of its room-temperature luminescence intensity at 423 K (150 °C). This superior anti-thermal quenching property is attributed to the weak electron–phonon coupling in its crystal structure, characterized by a low Huang–Rhys factor (S = 2.15). By integrating this phosphor with a blue LED chip, we fabricated a NIR pc-LED device with a photoelectric conversion efficiency of 2.2%@20 mA. The device would demonstrate significant advantages in diverse fields, including nondestructive testing, biomedical imaging, and intelligent security, highlighting the great potential of AlF3:Cr3+ for industrial applications.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Bing Liu,Hong Yang,Minxue Deng,Jinbin Xu,Yongbo Xiong,Sihui Wu,Zhanwang Li,Yuncong Xu,Mingyue Wang,Wenfeng Han
The gas-phase catalytic dehydrofluorination of hydrofluorocarbons (HFCs) to hydrofluoroolefins (HFOs) is a critical pathway for HFC resource utilization. Aluminum fluoride (AlF3) derived from Al2O3 fluorination is an efficient catalyst for this process, with its performance strongly dependent on the hydroxyl content and oxygen vacancy concentration of the Al2O3 precursor. In this work, pseudoboehmite (AlOOH) was calcined at 400–600 °C to prepare Al2O3 precursors (AlOOH-T) with tailored hydroxyl contents, followed by fluorination to obtain AlF3 catalysts (AlOOH-T-F). Results showed that increasing the calcination temperature reduced the hydroxyl content and increased the oxygen vacancy concentration in AlOOH-T, leading to significant variations in crystallite size, specific surface area, and surface acid properties of the derived AlF3 catalysts. AlOOH-500-F, derived from AlOOH calcined at 500 °C (optimal hydroxyl and oxygen vacancy levels), exhibited the smallest crystallite size (13.9 nm), the largest specific surface area (21.2 m2·g–1), and abundant medium-strength Lewis acid sites. In the dehydrofluorination of 1,1,1,3,3-pentafluoropropane (HFC-245fa), AlOOH-500-F achieved 75% conversion with no deactivation over 32 h of operation, outperforming catalysts derived from precursors calcined at 400 °C (AlOOH-400-F) and 600 °C (AlOOH-600-F). Further studies on the fluorination degree revealed that excessive fluorination enlarged AlF3 crystallite size and intensified surface acidity, accelerating coke-induced deactivation. Among the tested catalysts, AlOOH-500-5 achieved an HFC-245fa conversion of 80% with no deactivation trend observed over 192 h, demonstrating its excellent stability and potential for industrial applications. This work highlights the critical role of precursor hydroxyl content in tailoring the AlF3 catalyst structure and acidity, providing a practical guideline for designing industrially viable catalysts for HFC conversion.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Chuntao Ge,Yong Yuan,Rong Li,Jie Li,Zhuo Zhao,Tao Zhu,Junjie Xu,Wenjuan Qi,Qian Kou,Jun Zhang,Saijun Xiao
Emerging as a highly promising technique, molten salt electrophoretic deposition (MS-EPD) enables the fabrication of protective ultra-high-temperature ZrB 2 coatings. However, its practical application has been constrained by the slow deposition rates (<0.4 μm/min) and limited coating thicknesses (<25 μm) achieved in conventional chloride or chlorofluoride-based molten salt systems. Herein, we reported a novel electrophoretic deposition (EPD) strategy that utilized a high-temperature fluoride molten salt system (NaF-AlF 3 , 1100 °C), which successfully overcame this kinetic limitation. This method generated ultrasmall ZrB 2 nanoparticles (NPs) with a mean particle size of 7.9 nm in the molten salt via an in-situ borothermal reduction reaction. Using these NPs as building units, a high deposition rate of 0.74 μm/min was achieved, enabling the fabrication of a fully dense, high-quality coating over 50 μm thick within 1 h. The resulting coating exhibited outstanding comprehensive properties including a nanoindentation hardness of 16 GPa, an elastic modulus of 172 GPa, and exceptional protection capability in an oxidizing environment at 1000 °C. Furthermore, this work revealed that the coating growth was dominated by an oriented attachment crystallization (OA) mechanism. This study not only established a novel pathway for the efficient and low-cost production of thick, high-performance ZrB 2 coatings, but also provided new fundamental insights into understanding and controlling the assembly behavior of nanocrystals in molten salt systems.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Shuai Tang,Xianwei Hu,Jiangyu Yu,Aimin Liu,Zhongning Shi,Zhuo Li,Yifan Zhang,Zhaowen Wang
The NaF-AlF 3 -TiO 2 ternary system is often used in the molten salt electrolysis process to produce Al-Ti alloys. In order to explore the dissolution reaction of TiO 2 in NaF-AlF 3 melts, the ionic structure of (6.58NaF-AlF 3 )-TiO 2 molten salts was examined by Raman spectroscopy combined with computational simulation in the present study. The results indicated that when TiO 2 was added to 6.58NaF-AlF 3 molten salt, it first reacted with F - or AlF 6 3- with the following reactions: 2F - +2TiO 2 = Ti 2 O 4 F 2 2- , 4AlF 6 3- +6TiO 2 = 2Al 2 O 3 + 3Ti 2 O 2 F 6 2- +6F - , and then the generated Al 2 O 3 reacted with TiO 2 and F - or AlF 6 3- with the following reactions: Al 2 O 3 + 3TiO 2 + 21F - =3TiO 3 F 3 5- +2AlF 6 3- , Al 2 O 3 + 4AlF 6 3- =3Al 2 OF 8 4- , Al 2 O 3 + 4AlF 6 3- =3Al 2 OF 6 2- +6F - . In addition, Ti 2 O 2 F 6 2- , TiO 3 F 3 5- and Ti 2 O 4 F 2 2- clusters belonged to Cs, C2v and C1 point group, and the main characteristic Raman bands of these clusters were due to the stretching vibration of O 1 -Ti 3 -O 2 -Ti 4 , Ti 1 -O 7 and O 6 -Ti 2 -O 5 and/or O 7 -Ti 1 -O 8 , respectively. What’ more, the main characteristic Raman bands of Ti 2 O 2 F 6 2- , TiO 3 F 3 5- and Ti 2 O 4 F 2 2- were located at 790, 850 and 900 cm −1 , respectively.
研究领域:
材料科学
·
化学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Guiru Sun,Zexu Zhang,Daming Yang,Yan Wang,Wei Lu,Mei Liu,Ming Feng
Li metal is considered as an ideal anode for Li-O 2 batteries because of its unbeatably theoretical specific capacity and low electrode potential. Unfortunately, the growth of Li dendritic and the sensitivity to electrolyte and O 2 hinder the practical applications of Li anode. Herein, AlF 3 as an electrolyte additive is firstly employed in a Li-O 2 battery, which can boost the formation of LiF@Al-Li@Al 2 O 3 -rich SEI film via in-situ spontaneous reactions of AlF 3 with Li anode in O 2 atmosphere. The generated SEI film contributes to inducing the homogeneous nucleation of Li and reducing the disgusting side reactions, which can suppress the growth of Li dendrite and improve the cyclability of Li anode. Benefiting from the rational design, both the Li-O 2 and the Li|Li symmetric batteries with AlF 3 electrolyte exhibit low overpotential and good cycling stability. We hope this work could provide a facile way to in-situ construct a stable SEI film to alleviate the uneven Li nucleation for Li-O 2 batteries.
研究领域:
材料科学
·
电化学
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高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Haitang Liao,Zhimin Li,Chuang Yu,Yuan Wang
The advent of solid-state lithium-ion batteries has made it possible to achieve high energy density and enhanced safety in energy storage systems. However, commercialization has been hindered by interfacial contact deterioration between lithium metal and the solid-state electrolyte, coupled with electron leakage issues. Interfacial issues fundamentally govern the battery's capability for stable and sustained energy conversion, while also determining the likelihood of lithium dendrite propagation and growth. Consequently, a lithiophilic-lithiophobic dual-functional SEI layer (LiF/AlF 3 ) is constructed from an AlF 3 -PVDF-HFP organic-inorganic composite interlayer in this research (named CPEA3). The LiF generated via in situ reaction between AlF 3 and metallic lithium, characterized by high electron insulation property and high interfacial energy toward lithium, effectively suppresses the nucleation and growth of lithium dendrites. Simultaneously, leveraging the high adhesion energy of AlF 3 to lithium effectively stabilizes interfacial contact during lithium stripping processes, thereby preventing delamination-induced interfacial polarization. Therefore, the improved Li symmetric cells demonstrate an ultrahigh critical current density (3.0 mA cm −2 ) and remarkable cycling stability exceeding 2,800 hours at 0.1 mA cm −2 . Notably, the Li|CPEA3/LLZGO/CPEA3|LiFePO 4 configuration demonstrates substantial long-term cycling stability with 95.1% capacity retention after 600 cycles at 0.5 C. This work provides an effect stagy to suppress side reactions at the electrode/electrolyte interface and impede lithium dendrite in solid-state battery penetration through the construction of an intermediate passivation layer.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2026
·Vol. 55
·期 9
·7684-7697
·
IF 2.8
Wang Guangping,Li Jie,Liu Jianhua,Yang Zhenhua
The primary crystallization temperature of an electrolyte is a critical parameter in the aluminum electrolysis process, determining the operating temperature of the electrolytic process. Therefore, the initial crystallization temperature is one of the most critical physicochemical properties of the electrolyte in the electrolytic aluminum process. However, the Na 3 AlF 6 -AlF 3 electrolyte system, which is predominantly used in industrial electrolysis systems, operates at high temperatures. Lowering the electrolysis temperature would lead to numerous issues, including reduced current efficiency and increased cell voltage. Therefore, we propose low-temperature aluminum electrolysis in the Na 3 AlF 6 -K 3 AlF 6 -Li 3 AlF 6 -AlF 3 -KF-Al 2 O 3 electrolyte system. The synergistic effect of K 3 AlF 6 and Li 3 AlF 6 on the initial crystallization temperature within this system was investigated. Results indicate that at a cryolite molar ratio (CR) of 1.7–2, each unit of K 3 AlF 6 added reduces the initial crystallization temperature by an average of 2–4°C, while each unit of Li 3 AlF 6 added lowers it by an average of 0.5–3.5°C. Analysis of the cold-quenched electrolyte phases indicates the formation of phases such as Na 5 Al 3 F 14 , K 2 NaAlF 6 , and Na 2 LiAlF 6 within the electrolyte system. This study systematically measured the initial crystallization temperatures of the Na 3 AlF 6 -K 3 AlF 6 -Li 3 AlF 6 -AlF 3 -KF-Al 2 O 3 electrolyte system. It significantly advances the progress of the aluminum electrolysis industry toward green and low-carbon development, opening new technical pathways for achieving energy conservation and emission reduction targets in aluminum electrolysis production processes. Graphical
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APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Xue Li,Yan-Rong Liu,Wen-Min Liao,Ai-Ping Jia,Yue-Juan Wang,Ji-Qing Lu,Meng-Fei Luo
Catalytic propane combustion was performed on a series of supported Pt/AlF 3 catalysts. These catalysts are very active and stable in the reaction, and the 0.2Pt/AlF 3 catalyst gives the highest specific reaction rate of 207.3 μmol g Pt −1 s −1 at 220 °C. The 1Pt/AlF 3 is much more active than the reference Pt/Al 2 O 3 catalyst, due to its higher content of metallic Pt species than that in the Pt/Al 2 O 3 . Furthermore, turnover frequency (TOF) based on Pt dispersion increases with the surface concentration of metallic Pt 0 in the catalyst, suggesting these species might be the active sites. Furthermore, synergistic roles of metallic and oxidized Pt species are found, as the TOFs calculated based on surface Pt 0 concentration reaches a maximum at the Pt 0 /Pt 2+ molar ratio of about 1. Such optimal Pt 0 /Pt 2+ ratio implies the requirement of Pt 0 Pt 2+ pair in the reaction, probably due to the activation and cleavage of C H bond on metallic Pt atom and the sequential oxidation on the oxidized Pt atoms.
研究领域:
催化化学
·
环境化学
·
材料化学
·
表面科学
·
能源化学
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Min Tan,Tao Li,Bo Shang,Henan Cui
The behavior of the ions in the molten NaF-AlF 3 salts plays a significant role in aluminium reduction process. Many experimental and modelling works have been carried out to investigate the ionic composition of the molten cryolite, which are still controversial. In this study, a recent thermodynamic model was introduced to compare with the Temkin model, which was assumed to consist of F − , AlF 4 − , AlF 5 2− , AlF 6 3− , Al 2 F 7 − , Al 2 F 9 3− , Al 2 F 10 4− , and Al 3 F 14 5− . The thermodynamic calculations were performed to investigate the influence of the cryolite ratios on the ionic composition of the molten NaF-AlF 3 and calculate the fractions of all the possible anions in the molten salts . On the other hand, the Raman spectra of the fluoro-aluminate ionic clusters were obtained by the quantum chemical calculations considering the existence of the cations Na + and the number of the ionic pairs in the structural models of the ionic clusters, which were used to parsing the high temperature in situ Raman spectrum of the molten cryolite. The ionic composition of the molten salts was discussed based on the thermodynamic calculations and the fitting results of the high temperature in situ Raman spectrum of the molten cryolite.
研究领域:
材料科学
·
物理化学
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2024
·
IF 3.2
Taiyu Duan,Yao Ji,Weichao Wang,Qinyuan Zhang
The 1.0 μm ultra-short pulse laser is distinguished by its high energy, short pulse width, and intense peak power density, serving various applications in materials processing and biomedicine. Yb ions play a crucial role in this wavelength range, yet achieving high doping levels in commercial Yb-doped silica fibers is challenging due to their dense network structure. Here, we present the design and fabrication of a fluorophosphate (FP) glass with high thermal shock stability (figure of merit is 0.95), achieved through thermodynamic prediction methods, ion field strength analysis, and glass structure theory. By modifying the composition of high-field-strength cations, we not only alter the fundamental properties of the glass but also enhance its thermomechanical performance. Specifically, Yb 3+ -doped Zn(PO 3 ) 2 -Ba(PO 3 ) 2 -AlF 3 -KF FP glass (Yb 10 -ZBAFP10) exhibits a high emission cross-section (0.74×10 −20 cm 2 at ∼1008 nm), a low level of minimum population inversion ( β min =0.09), and minimum pump intensity ( I min =1.75 kW/cm 2 ). Furthermore, it demonstrates a stable fluorescence lifetime within the temperature range of 298 ∼ 473 K. These findings highlight the potential of Yb 3+ -doped FP glass for applications demanding high thermal shock stability, particularly in high repetition rate ultra-short pulse laser systems.
研究领域:
光子学
·
材料科学
·
激光技术
·
玻璃物理
·
光学材料
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高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Liyu Chen,Jiaxin Yang,Yifan Zhang,Shaohua Wu,Youjian Yang,Wenju Tao,Zhaowen Wang
The synthesis of an Al–Zr master alloy in KF–AlF 3 –ZrO 2 molten salt by combining aluminothermic reduction and molten salt electrolysis processes was studied. The effects of reduction parameters such as stirring, reaction time, Al/ZrO 2 mass ratio and temperature on the Zr content and Zr recovery rate were studied and optimized. Under the optimal conditions of stirring, reaction time of 4 h, Al/ZrO 2 mass ratio of 3 and temperature of 960 °C, an Al–Zr master alloy can be obtained with a Zr content of 6.78 wt% and Zr recovery rate of 29.85%. The characterization results of the alloy show that the main phases contain Al and Al 3 Zr. And the Al 3 Zr appears as long rod-shaped or tetragonal shapes, which influenced by the Zr content and cooling rate. In addition, the reduced molten salt is electrolyzed to further extract Zr from the molten salt. The results show that the Zr remaining in the molten salt is completely recovered with a Zr recovery rate up to 94.72%. This two-step process is feasible for the large-scale extraction of Zr in molten salts to produce Al–Zr master alloys.
研究领域:
冶金工程
·
材料科学
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高影响因子
危险品化学品经营许可证（带存储）