ChemSusChem
·
2025
·
IF 6.6
Guoxu Wang,Qinghua Liu,Shang-Sen Chi,Qiujun Wang
Poly(ethylene oxide) (PEO)-based solid-state polymer electrolytes have emerged as one of the most promising candidates for high-energy-density lithium-metal batteries in energy storage applications. However, their notably low ionic conductivity has significantly hindered PEO-based polymer electrolytes’ practical application and development, particularly at room temperature (RT). To address the critical challenge of low RT ionic conductivity in PEO-based solid-state electrolytes, this study develops a composite solid electrolyte (CSE) synergistically reinforced by high-concentration lithium salts and Al 2 O 3 filler. The “polymer-in-salt” strategy disrupts PEO crystallinity via concentrated Li salt to form continuous ion channels, while Al 2 O 3 further suppresses crystallization and bridges ionic cluster transport. This dual optimization achieves an ultrahigh ionic conductivity of 9.62 × 10 −4 S cm −1 and a 4.8 V electrochemical stability window at RT. The Li symmetric cell exhibits stable cycling for 1000 h at 1 mA cm −2 /1 mAh cm −2 , and the all-solid-state Li//LiFePO 4 coin cell retains 70.7% capacity after 300 cycles at 0.1C. Moreover, Li//LiFePO 4 pouch cell maintains 96.4% capacity over 100 cycles at RT. This work establishes a new paradigm for material design and performance enhancement in practical solid-state lithium batteries. Graphical This study develops a novel PEO-based composite solid electrolyte (CSE) by combining PEO, high-concentration lithium salt, and Al 2 O 3 . The CSE achieves a high ionic conductivity of 9.62×10 -4 S·cm -1 at room temperature. The designed structure disrupts PEO crystallization and facilitates Li+ transport. The resulting solid-state battery exhibits stable cycling over 300 cycles with 70.7% capacity retention and demonstrates 96.4% retention in pouch cells, showing great potential for commercial application.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Le Fu,Mingxi Deng,Zihua Lei,Wenjun Yu,Yang Liu
Aluminum borate whiskers (ABOws) have been widely utilized as a secondary phase for fabricating ceramic composites. The morphology and thermal stability of ABOws play a critical role in achieving their optimal performance. In this study, two precursor powders were synthesized via chemical precipitation and mechanical mixing, followed by the induction of a solid–liquid reaction at elevated temperatures to form ABOws. For ABOws prepared from chemically precipitated powder, a metastable intermediate Al 2.1 B 0.9 O 4.5 phase was first formed at 850°C, which subsequently transformed to Al 4 B 2 O 9 at 1000°C and further evolved into needle-like Al 18 B 4 O 33 with high aspect ratio at 1150°C. In contrast, for ABOws prepared via mechanically mixed powder, the formation of Al 4 B 2 O 9 began at 850°C, and it fully converted to rod-like Al 18 B 4 O 33 at 1150°C. The morphology differences of those two types of ABOws were ascribed to their different nucleation routines. Homogenous and heterogeneous nucleation occurred in the chemically precipitated amorphous and mechanically mixed powders, respectively, leading to the formation of ABOws with different morphologies. The two types of ABOws demonstrated phase composition stability up to 1400°C. However, pronounced morphological changes were observed at 1200°C. These findings offer valuable insights into the microstructure formation process and thermal stability of ABOws with tunable morphologies.
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DALTON TRANSACTIONS
·
2025
·
IF 3.3
Yanhui Zhang,Jiajia Li,Yaqing Ding,Kaitong Liu,Xiaofeng Gu
The mixed-anionic compounds are attractive hunting grounds for probing optical crystals due to their interesting physiochemical properties. Herein, the first barium fluoroaluminophosphate, BaAlPO4F2, was synthesized by high temperature reactions in the closed system for the first time. In the structure, the PO4 group bonds with [Al2O6F5] dimers to form the unusual [Al2PO5F4]∞ 2D layers and the Ba2+ cations reside in the interlayer space. This paper discusses the flexibility and diversity of the assembly s
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APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Zhenhua Ji,Shijing Xie,Hao Chen,Peng Zhang,Ding Luo,Yixuan Chai,Zhuo Wang
Aiming at the key issues of current vehicle Ammonia Slip Catalyst (ASC) catalysts, such as poor low-temperature activity, high noble metal content, and narrow operating window, this study aims to construct multi-scale pore structures in Al 2 O 3 supports of supported catalysts to regulate selective catalytic oxidation of NH 3 (NH 3 -SCO) across broad temperature ranges and space velocities by improving convective diffusion, conduction, migration, and adsorption processes within catalyst voids. Characterization results show that a series of catalyst supports with different pore structures was successfully prepared using different templates. Pt was loaded using an optimized supported catalyst preparation method. Meanwhile, the coating amount of the prepared catalyst on cordierite monolith substrates was significantly reduced, and NH 3 -SCO performance tests were conducted. The results indicate that single mesoporous structures have limited regulation on the intrinsic activity of catalysts, while macroporous structures enhance the influence of desorption and void diffusion of gas-phase reactants and products on catalytic reactions. In the presence of macroporous structures, the promotional effect of mesopores on NH 3 -SCO reactions is enhanced. Among all catalysts, hierarchical porous catalysts with larger pore diameters and better interconnected pore structures exhibit NH₃ conversion rates exceeding 99 % across the full temperature range of 200℃ - 500℃, with NH 3 concentrations below the regulatory limit of 10 ppm throughout the operating window. Macroporous structures and their pore diameters play a dominant role in regulating NH 3 -SCO reactions, particularly with stronger regulation at low temperatures. Increasing space velocity enhances the diffusion rate of NH 3 gas molecules while amplifying the influence of pore structure regulation on catalysts. Notably, compared with traditional Pt/Al 2 O 3 , pore structure regulation does not significantly increase the generation of N 2 O while effectively enhancing the catalytic activity of the ASC catalyst.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Xiao-Tong Jia,Xiu-Le Cao,Zhao-Hui Zhang,Qiang Wang,Jin-Zhao Zhou,Wen-Jun Li,Xing-Wang Cheng
This study investigates the local mechanical behavior of aluminum oxynitride (AlON) ceramics through nanoindentation and microstructural analysis. The intragranular region exhibits a higher hardness than the grain boundaries (29.0 GPa vs. 26.4 GPa at 5 mN), a difference that diminishes with increasing load. A distinct indentation size effect is observed, which is less pronounced near the grain boundaries (Meyer index, n = 1.58) than within the grains (n = 1.50). Microstructural characterization reveals the influence of grain boundaries on dislocation nucleation and slips band evolution. Notably, high-density dislocations, slip bands, and deformation twins are identified beneath the indentation tip, demonstrating that the localized plastic deformation is accommodated by both dislocation slip and twinning. These findings clarify the local mechanical response and unveil the underlying micro-deformation mechanisms of AlON ceramics, providing valuable insights for their microstructural design and reliability optimization in advanced structural applications.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Bingguo Liu,Jiafu Zhang,Xinrong Chen,Heyu Wang,Feng Wang,Yangzi Li,Dan Zhao,Zhe Guan,Jian Xu,Baoli Du,Dennis Dan Corell,Carsten Dam-Hansen,Ole Bjarlin Jensen
Free from the “curse” of efficiency droop in high-power LEDs, laser-driven phosphor-converted laser diodes (pc-LDs) light sources demonstrate significantly greater potential in achieving ultra-high brightness white light. To mitigate the luminance saturation, rigorous re-optimization of luminescent ion concentration and heat dissipation geometry is essential. Beyond the photometric and colorimetric properties, the low spatial uniformity of pc-LDs poses a critical but often overlooked challenge. Here, we present a systematic investigation of the effect of Ce 3+ concentration and thickness on the luminance and uniformity of YAG:Ce ceramic color converters. To quantitatively assess luminescence uniformity, high dynamic range color images were captured to statistically evaluate spatial chromaticity variations across the luminescent spot. The results firmly demonstrated that the Ce 3+ concentration and thickness are two interdependent parameters closely related to uniform chromaticity and luminance, which should be optimized simultaneously. This study provides critical optimization guidelines for laser lighting development.
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Materials Today Chemistry
·
2025
·
IF 6.7
Zhe Kong,Yucai Lu,Jinyu Dai,Yunlan Sun,Jiuyu Chen,Baozhong Zhu
Hydrocarbon fuels doped with aluminum nanoparticles (ANPs) can enhance their combustion and energy output characteristics. However, there is an unknown impact of its oxidation degree on the stability and ignition and combustion performance (IACP) of nanofluid fuels. The experimental and molecular dynamics (MD) simulations were combined to explore the impact of ANPs with varying degrees of oxidation on the stability and IACP of aluminum/JP-10 (Al/JP-10)-based nanofluid fuels. The unoxidized ANPs are better dispersed in JP-10 fuel. However, as the oxidation degree of the ANPs increases, their agglomeration in JP-10 increases, reducing the stability of Al/JP-10 fuels. Especially, the activation energy of the Al/JP-10 (ANPs) system also increases, leading to a 36.8 % longer ignition delay for JP-10 fuel. In addition, the oxidation of ANPs partially inhibits the reaction of the core Al, which delays the peak of the formation of Al cluster, and thus hindering the combustion behavior of the nanofluid fuel. At 2000 K, the oxidation of ANPs suppresses the thermal decomposition of JP-10, while at 3000 K, Al 2 O 3 exhibits the most pronounced catalytic influence on JP-10 combustion.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jinquan Wen,Guihua Liu,Tiangui Qi,Nianzi Liu,Qiusheng Zhou,Jian Guo,Leiting Shen,Yilin Wang
The properties of starting aluminum hydroxide powder greatly determine the sintering activity and microstructure of final alumina ceramic. Combing the modified properties of industrial gibbsite and boehmite, binary alumina ceramics with high mechanical property were fabricated under ambient pressure without any additives. The enhanced sintering activity of binary alumina compacts is attributed to the high tetrahedral aluminum content stemmed from gibbsite due to pseudomorphic transition. The low α-Al 2 O 3 content and high microstrain in boehmite-derived α-Al 2 O 3 also facilitate the densification of binary alumina compacts. In addition, the sintering mechanism shifted from boundary diffusion to the combination of boundary and volume diffusion with the introduction of boehmite-derived alumina, leading to accelerated atoms migration and significant reduction of activation energy from 426 kJ/mol to 289 kJ/mol. The resultant rapid densification at low temperature prevented excessive grain growth at the late sintering and resulted in remarkable grains refining. Benefited from the collective effect of binary alumina packing, accelerated sintering kinetics and grain refinement strengthening, full dense in binary alumina ceramics with a 99.8% relative density, 0.02% apparent porosity, 25.88 GPa Vickers hardness and 4.41 MPa·m 1/2 fracture toughness was achieved at 1650℃ for 2 h. This study presented a facile efficient strategy to preparing high-quality binary alumina ceramics, also highlighting the differences in aluminum hydroxide precursor on the performance of alumina-bearing materials.
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CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 29
·61520-61530
·
IF 5.6
Yunlong Li,Dan Zhang,Taifang Zhang,Lingxuan Zhou,Peng Wang,Vesna Đorđević,Valery F. Gremenok,Miroslav D. Dramićanin,Chonggeng Ma
Environment-friendly Fe 3+ ions as near-infrared (NIR) activators have garnered significant attention in intelligent NIR light sources; however, designing wavelength-tunable and outstanding thermal stability Fe 3+ -doped NIR luminescent materials remains a formidable challenge. In this study, we synthesized a novel garnet-structured NIR phosphor Y 2 CaAl 4 SiO 12 : Fe 3+ , Yb 3+ and investigated its luminescent properties and energy transfer mechanisms. Under 270 nm ultraviolet light excitation, Y 2 CaAl 4 SiO 12 : Fe 3+ demonstrates broadband NIR emission peaking at 803 nm, characterized by a full width at half maximum (FWHM) of 107 nm and exhibiting a remarkably high internal quantum efficiency (IQE) of 91.70 %, which is markedly superior to most reported Fe 3+ doping NIR-emitting materials. Notably, the incorporation of Yb 3+ ions facilitates an efficient energy transfer process from Fe 3+ to Yb 3+ , which not only significantly broadens the emission spectrum but also enhances the thermal stability of Fe 3+ (I 373 K /I 298 K = 59.24 %) compared to the singly Fe 3+ doped sample (I 373 K /I 298 K = 45.30 %). Finally, the optimized Y 2 CaAl 4 SiO 12 : Fe 3+ , Yb 3+ NIR phosphor exhibits promising potential for anti-counterfeiting applications.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Dan Zhang,Taifang Zhang,Mekhrdod Kurboniyon,Peng Wang,Chonggeng Ma
A novel garnet-type phosphor, Gd2–yYyLuAl4GaO12: Ce3+, was synthesized via a high-temperature solid-state reaction to address the demand for efficient green-emitting materials in solid-state lighting. By employing a cation substitution strategy (Y3+/Gd3+ codoping), the photoluminescence performance was significantly enhanced: the quantum efficiency increased from 86.79 to 96.86%, accompanied by a tunable emission shift from yellow to green (560–520 nm). Moreover, the thermal stability at 423 K improved dramatically from 40.79 to 92.98%, surpassing those of commercial green phosphors. Structural and spectral analyses revealed that the optimized crystal field splitting and enhanced lattice rigidity, induced by cation substitution, effectively suppressed nonradiative transitions, thereby boosting both quantum efficiency and thermal stability. A prototype white light-emitting diode (WLED) fabricated with Y2LuAl4GaO12: Ce3+ phosphor exhibited excellent performance, including a high color rendering index (Ra = 91), low correlated color temperature (CCT = 3043 K), and good color stability under varying driving currents. These findings highlight the significant promise of Gd2–yYyLuAl4GaO12: Ce3+ as a superior green-emitting phosphor for advanced WLED systems, providing a feasible pathway for designing outstanding thermal stability and color-tunable luminescent materials via cationic engineering.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Junhao Cao,Zekun Wang,Xinyu Ma,Xiaohong Liu,Guilin Feng,Wei Xiang
O3-type NaNi 2/9 Fe 1/3 Cu 1/9 Mn 1/3 O 2 is considered a promising layered oxide cathode for sodium-ion batteries, owing to its high operating voltage and cost-effective elemental composition. However, its practical application is hindered by irreversible phase transitions at high voltages, which severely compromise structural integrity and cycling stability during prolonged operation. To address these challenges, elemental doping has emerged as an effective strategy to modulate crystal lattice parameters and suppress detrimental phase evolution. In this study, we propose a multi-element (Li/Mn/Al) doping approach, synthesized via a hydroxide-precursor-assisted sodiation process, to enhance the structural robustness and electrochemical performance of O3-type NaNi 2/9 Fe 1/3 Cu 1/9 Mn 1/3 O 2 . Specifically, Aluminum doping serves as a structural pillar to stabilize the transition metal-oxygen (TM-O) framework, effectively mitigating layer gliding. Meanwhile, Li doping activates the Fe 3+ /Fe 4+ redox couple, enabling charge compensation and enhancing reversible capacity. Benefiting from the synergistic effects of Li/Mn/Al co-doping, the resulting Na(Ni 2/9 Fe 1/3 Cu 1/9 Mn 1/3 ) 0.96 Mn 0.02 Al 0.01 Li 0.01 O 2 cathode demonstrates suppressed Jahn-Teller distortion, improved air stability, and superior cycling performance. Notably, a reduced interlayer distance ratio ( d (O Na-O) / d (O-TM-O) ) correlates with delayed O3-to-P3 phase transformation and enhanced lattice stability, as confirmed by crystallographic analyses. The synergistic effects of Li/Mn/Al co-doping not only stabilize the host structure but also unlock cationic redox reversibility, offering a pathway to balance energy density and longevity in sodium-based cathodes.
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JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Di Qian,Yahong Jin,Haoyi Wu,Yihua Hu
Advances in broadband near-infrared (NIR) emitting materials represent a pivotal frontier for next-generation intelligent NIR phosphor-converted light-emitting diode (pc-LED) technologies. However, practical implementation of these materials has been constrained by challenges such as suboptimal quantum efficiency (QE) and pronounced thermal quenching (TQ). In this study, we report the synthesis and comprehensive characterization of broadband NIR-emitting phosphors, Gd 3 AlGa 4 O 12 :Cr 3+ , exhibiting anti-TQ properties without compromising QE. The material's inherent structural rigidity , wide bandgap, and the minimal electron-phonon coupling (EPC) effect provide a foundation for high-performance broadband NIR luminescence. Strategic optimization of Cr 3+ doping concentrations, combined with controlled excited-state electron migration, achieves an internal quantum efficiency (IQE) of 98.23 % and a remarkable anti-TQ capability (135.1 %@483 K). The practical potential is further demonstrated through prototype NIR pc-LED implementation, where integration with a commercial blue LED chip delivers an NIR output power of 285.38 mW at 1170 mA and a wall-plug efficiency (WPE) of 17.42 % at 30 mA, highlighting its potential for use in diverse applications such as plant growth, component analysis, night vision, nondestructive detection, and non-invasive imaging. Overall, this work addresses critical challenges in broadband NIR phosphors and advances the development of high-performance and energy-efficient miniatured broadband NIR light sources .
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