Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Su Han,Li Jingru,Zhong Yu,Liu Yu,Gao Xuhong,Kuang Juner,Wang Minkang,Lin Chunxi,Wang Xiuli,Tu Jiangping
Sulfides are promising electrolyte materials for all-solid-state Li metal batteries due to their high ionic conductivity and machinability. However, compatibility issues at the negative electrode/sulfide electrolyte interface hinder their practical implementation. Despite previous studies have proposed considerable strategies to improve the negative electrode/sulfide electrolyte interfacial stability, industrial-scale engineering solutions remain elusive. Here, we introduce a scalable Li-Al-Cl stratified structure, formed through the strain-activated separating behavior of thermodynamically unfavorable Li/Li 9 Al 4 and Li/LiCl interfaces, to stabilize the negative electrode/sulfide electrolyte interface. In the Li-Al-Cl stratified structure, Li 9 Al 4 and LiCl are enriched at the surface to serve as a robust solid electrolyte interphase and are diluted in bulk by Li metal to construct a skeleton. Enabled by its unique structural characteristic, the Li-Al-Cl stratified structure significantly enhances the stability of negative electrode/sulfide electrolyte interface. This work reports a strain-activated phase separation phenomenon and proposes a practical pathway for negative electrode/sulfide electrolyte interface engineering.
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2018
·
IF 4.521
Pengjing Chen,Guofeng Zhao,Ye Liu,Yong Lu
A series of Ni 5 Ga 3 / m -SiO 2 /Al 2 O 3 /Al-fiber ( m = 0, 0.5, 1.0, 3.0 and 5.0 wt%) catalysts have been developed for CO 2 hydrogenation to methanol at ambient pressure. Microfibrous-structured SiO 2 /Al 2 O 3 /Al-fiber supports are obtained though endogenous growth of free-standing boehmite (AlOOH) nanosheets onto a three-dimensional (3D) network of 60 μm-Al-fiber thin felt with the aid of steam-only hydrothermal oxidation reaction between Al metal and H 2 O (2 Al + 4H 2 O → 2 AlOOH + 3H 2 ), followed by calcination and SiO 2 -modification using silica sol. The bimetallic Ni 5 Ga 3 nanoparticles are then placed onto the pore surface of as-obtained SiO 2 /Al 2 O 3 /Al-fiber support by co-impregnation method using Ni and Ga nitrates as precursors followed by reduction in H 2 at 630 °C. The promising Ni 5 Ga 3 /1-SiO 2 /Al 2 O 3 /Al-fiber catalyst is capable of converting 2.3% CO 2 into CH 3 OH with a high selectivity of 86.7% as well as 10.3%/3.0% selectivities to CO/CH 4 at 210 °C, for a feed of CO 2 /H 2 /N 2 (2/6/1, molar ratio). Such microfibrous-structured catalyst design combines the promising catalytic performance of Ni 5 Ga 3 with the enhanced heat transfer and high permeability of the Al 2 O 3 /Al-fiber support. The effect of SiO 2 loading on the formation of Ni 5 Ga 3 alloy nanoparticles is also discussed.
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高影响因子
FUEL
·
2022
·
IF 8.035
Yanli Zhu,Wei Le,Wanjun Zhao,Xiaohang Ma,Dazhi Liu,Jianxin Li,Qingjie Jiao
To improve the heat release and reactivity of Al, Li was incorporated into Al via the centrifugal atomization in this study for obtaining Al-Li alloy powders. The microstructure and composition of the samples were characterized by SEM, XRD, and ICP. The oxidation kinetics were evaluated via TG/DSC, and the energetic performance of the Al-Li/KP composites was tested. The results show that spherical Al-Li alloy powders with the well-distributed dendritic structure are obtained that are mainly composed of αAl and Al-Li compounds. The oxidization rate of Al-Li alloy powders is higher than pure Al, owing to the decreasing activation energy caused by the catalysis of the soluble Li in Al and Al-Li compounds. The shorter ignition delay and higher reaction rate of Al-Li/KP with increasing Li content in Al-Li alloy powders is a result of the microexplosion of Al-Li. Therefore, Al-Li alloy powders with high reactivity are promising fuels for energetic materials.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 102
·期 9
·5494-5502
·
IF 3.094
Weijia Guo,Jie Zhang,Yu Luo,Zhenxing Yue,Longtu Li
Ba 4 (Sm 0.15 Nd 0.85 ) 9.33 Ti 18- z Al 3 z /4 O 54 (BSNT- z Al, 0.0 ≤ z ≤ 2.5) ceramics were prepared via a solid-state reaction, and the effects of Al doping on the microwave dielectric properties and defect behavior of the title compound were studied. X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM) photographs suggested that Al ions successfully entered the lattice to form tungsten-bronze-like solid solutions. With a small amount of Al substitution, the relative dielectric constant (ε r ), and the temperature coefficient of resonant frequency ( τ f ) values decreased, whereas the quality factor ( Q × f ) substantially increased by approximately 50%. The defect-related extrinsic dielectric loss was clarified via the thermally stimulated depolarization current (TSDC) technique. With Al doping, the TSDC relaxation of across-grain-boundary oxygen vacancies ( ) vanished, whereas that of defect dipoles ( ) appeared at relatively low temperatures. Therefore, in the BSNT- z Al ceramics, oxygen vacancies were more inclined to interconnect with to form defect dipoles. This could reduce the activity of and account for the notable improvement in the Q × f values. In particular, the excellent characteristics of ε r = 67.33, Q × f = 16 530 GHz, and τ f = +0.87 ppm/°C were achieved in the specimens with z = 1.5 sintered at 1350°C for 4 hours.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2018
·
IF 2.873
Fujuan Chu,Chuandong Zuo,Chaoyang Ma,Zhaobo Tian,Taotao Feng,Chong Zhao,Yuzhen Wang,Wenfeng Dong,Jiaqi Long,Zicheng Wen,Xuanyi Yuan,Yongge Cao
Compared the most reported synthesis methods, a series of La x Sm 1−x Mn 2 O 5 (x = 0, 0.1, 0.3, 0.5) catalysts were first synthesized through sol-gel solution combustion synthesis with a short cycle and high yield. The main impact of different La/Sm molar ratios is the amount of surface adsorbed oxygen (O ads ) and surface Mn 4+ ions as revealed by XPS results. Electrochemical properties are characterized by rotating disk electrode (RDE) and the full dischargeable Al-air battery with 4 M NaOH electrolyte. The measurements of RDE reveal that the electron transfer number of La x Sm 1−x Mn 2 O 5 (x = 0, 0.1, 0.3, 0.5) are all closed to 4, and the sample prepared with x = 0.1 possesses the most excellent electrocatalytic activity for oxygen reduction reaction (ORR) and good discharge performance in alkaline medium. All of the above results indicate that the La x Sm 1−x Mn 2 O 5 (x = 0, 0.1, 0.3, 0.5) are promising catalysts with a high catalytic activity toward ORR.
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Linjia Li,Yiran Zhang,Jiaqi Feng,Shu Zhao,Ke Li,Zhen Huang,He Lin
Integrated carbon capture and utilization (ICCU), based on dual-function materials (DFMs), is an emerging technology for carbon dioxide (CO2) emission control. DFMs composed of Ni–Ca–Al systems are favored owing to their affordability. However, their performance needs to be further improved. In this study, Ni/AlCaOx DFMs are prepared by one pot-impregnation method, reaching an adsorbing capacity of 1796 μmol CO2/gDFM and a production of 1790 μmol CH4/gDFM after ten cycles at 450 °C. The Ni–Ca–Al synergistic effect was investigated to understand the good performance of DFMs: during H2 pretreatment, Ca can weaken the strong interaction of Al–Ni and promote the reduction of NiO by facilitating Ni to gain electrons from H2, where Al may act as an intermediate carrier for electron transfer. In the carbonation process, Al modulates the synergistic interaction between Ca and Ni by regulating the spacing and distribution of catalytic and adsorption sites to improve the Ni/AlCaOx cycling performance. Besides, oxygen vacancies can also enhance the DFMs’ carbon capture performance. During the methanation process, Ni reduces the decomposition temperature of the carbonate formed at strongly basic sites, favoring the methanation reaction.
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高影响因子
Advanced Sustainable Systems
·
2023
·Vol. 8
·期 2
·2300331
·
IF 7.1
Cailing Yang,Wenxu Zhang,Rongnian Xu,Huaiwu Peng,Zhenshi Zhang,Xiaomei Liu,Li Li,Tingli Li,Jing Li,Pengbo Liu,Xinlu Jin,Yuanyuan Ma,Ziqiang Lei
Modified MIL-101(Al)-NH 2 (MIL-101(Al)-NH 2 -net) is used as a crosslinking agent and acrylic acid (AA) as a monomer, the MIL-101(Al)-NH 2 -net grafted polyacrylic acid (MIL-101(Al)-NH 2 -net-g-PAA (MAP)) composite water-absorbent material is synthesized using the free radical polymerization method to study the application of composite absorbent materials in water collection. The structure and morphology of the composite water-absorbent material are characterized using Fourier transform infrared spectrometry (FTIR), scanning electron microscope (SEM), transmission electron microscope (TEM), Brunauer Emmett Teller (BET), and thermogravimetric analysis (TG), and the contents of ammonium persulfate (APS), MIL-101(Al)-NH 2 -net, and neutralization degree of AA are optimized. Under optimal conditions, the water absorption ratios of the composite materials in distilled water, tap water, and 0.9% NaCl solution are 744, 169.5, and 85.5 g g −1 . In addition, the properties of collecting water vapor are investigated. At 25 °C, 50% Relative Humidity (RH), 70% RH, and 90% RH, the MAP water vapor adsorption capacity is 0.0312, 0.5760, and 1.6856 g g −1 , respectively. The water vapor adsorption of MIL-101(Al)-NH 2 and MIL-101(Al)-NH 2 self-polymerization products are 0.025 and 0.1278 g g −1 , respectively. The result showed that autopolymerization can improve the water vapor adsorption performance.
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高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Wenhao Xia,Biyi Xu,Huanan Duan,Yiping Guo,Hongmei Kang,Hua Li,Hezhou Liu
Li7La3Zr2O12 (LLZO) is a promising electrolyte material for all-solid-state battery due to its high ionic conductivity and good stability with metallic lithium. In this article, we studied the effect of crucibles on the ionic conductivity and air stability by synthesizing 0.25Al doped LLZO pellets in Pt crucibles and alumina crucibles, respectively. The results show that the composition and microstructure of the pellets play important roles influencing the ionic conductivity, relative density, and air stability. Specifically, the 0.25Al-LLZO pellets sintered in Pt crucibles exhibit a high relative density (∼96%) and high ionic conductivity (4.48 × 10–4 S cm–1). The ionic conductivity maintains 3.6 × 10–4 S cm–1 after 3-month air exposure. In contrast, the ionic conductivity of the pellets from alumina crucibles is about 1.81 × 10–4 S cm–1 and drops to 2.39 × 10–5 S cm–1 3 months later. The large grains and the reduced grain boundaries in the pellets sintered in Pt crucibles are favorable to obtain high ionic conductivity and good air stability. X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy results suggest that the formation of Li2CO3 on the pellet surface is probably another main reason, which is also closely related to the relative density and the amount of grain boundary within the pellets. This work stresses the importance of synthesis parameters, crucibles included, to obtain the LLZO electrolyte with high ionic conductivity and good air stability.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Kang An,Siran Zhang,Hong Wang,Ningyan Li,Ziyang Zhang,Yuan Liu
Direct hydrogenation of CO 2 into ethanol has been considered as an up-and-coming way to achieve CO 2 utilization. Ethanol can be generated by reverse water gas shift as well as CO hydrogenation over Co-based catalysts, where the regulation of Co 0 − Co δ+ is critical. Herein, we designed a supported Co-based catalyst doped with gallium, which was derived from Co-Al-O spinel precursor to facilitate synergistic catalyzing for CO 2 -to-ethanol transformation. The selectivity of ethanol reached 20.1 % in a continuous flow fixed micro-reactor over reduced CoGa 1.0 Al 1.0 O 4 /SiO 2 catalyst at 270 °C and 3.0 MPa. Results of characterization show that the existence of the strong interaction between Ga oxide and cobalt induced the configuration of Co 0 − Co δ+ active pairs, which promotes the process of ethanol synthesis by coupling the dissociation (CH x *)/non-dissociation (CO*) of the intermediates. The strategy by tuning the interaction between cobalt and gallium and/or aluminum oxide brings an avenue to tailor Co 0 − Co δ+ active pairs for the hydrogenation of CO and CO 2 .
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Bolong Jiang,Yuhan Zhang,Huan Wang,Kun Liu,Nan Jiang,Jiayou Li,Hua Song,Yanguang Chen
Hydrodeoxygenation (HDO) plays a crucial role in upgrading pyrolysis-oil derived from biomass. Here we describe a method for fabricating a carbon-encapsulated nickel metal–acid bifunctional catalyst (Ni@C/RCS-Al) supported on aluminum-doped radial channel silica (RCS-Al). This catalyst exhibits a large surface area and highly dispersed accessible active sites, achieved through a combination of salicylate- and MOF-assisted strategies. The RCS-Al was prepared by a one-pot salicylate-assisted hydrothermal method in an aqueous phase containing an Al source, which is simple, has a high yield, and saves time. The results show that Ni@C/RCS-Al displays a well-defined radial channel pore structure with a mesopore diameter of 31.1 nm, which can significantly increase the number of accessible active sites and accelerate mass transfer. The MOF-assisted strategy leads to the formation of highly dispersed smaller carbon-encapsulated nickel nanoparticle active sites, and Al doping contributes to the adjustable acid sites, demonstrating that Ni@C/RCS-Al is a metal–acid bifunctional catalyst. Importantly, the kinetics study revealed a high reaction constant for the constructed Ni@C/RCS-Al catalyst. Ni@C/RCS-Al demonstrates remarkable performance in HDO, achieving complete m -cresol conversion and 100 % selectivity to the target product methylcyclohexane within a brief period of 75 min (T = 250 °C p = 2 MPa, m-cresol/catalyst (g) = 7.5). This exceptional performance stems from its radial channel pore structure and optimization of metal–acid sites. The thin carbon layer on the Ni surface contributes to its superior stability and water resistance, as verified by an experimental study and DFT calculations. This work opens up a new idea for the application of radial channel silica-supported catalysts in various reactions.
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高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2025
·
IF 5.6
Yingfeng Wang,Kaizhun Li,Huiqin Zhang,Xun Zhang,Wei Li,Ming Huang,Xiaojuan Li,Shumin Zhang
Antibiotic resistance poses a major challenge to modern healthcare and requires innovative microbial control strategies. Here, we report a novel method for integrating aluminum-doped copper sulfide (CuS@Al) microspheres into polyvinyl alcohol (PVA) matrix by electrospinning to obtain multifunctional nanofiber membranes with both photothermal and photodynamic antimicrobial properties (PVA-CuS@Al). Based on the rational design of Al doping to form structural defects on CuS microspheres, the light absorption and reactive oxygen species (ROS) were significantly enhanced. Under near-infrared (NIR) irradiation (808 nm, 2.0 W/cm²), PVA-CuS@Al with 5 wt% CuS@Al achieved rapid temperature rise from 25 °C to 181 °C within 15 s, and complete inactivation of Escherichia coli and Staphylococcus aureus was achieved within 10 min by photothermal ablation. In addition, under simulated sunlight, the membrane effectively generates ROS, achieving 100 % bacterial inhibition through photodynamic effects. The performance of the material goes beyond previous studies by combining dual antibacterial mechanisms on a single platform, reducing the required additive concentration (3 wt% CuS@Al), while maintaining biocompatibility and blood compatibility. This work introduces the development strategy of a new generation of antibacterial wound dressing with high efficiency and low cytotoxicity.
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产品关联
DOI
PubMed
高影响因子
Frontiers of Materials Science
·
2015
·Vol. 9
·期 4
·366-372
·
IF 1
Xia Yu,Ma Liang,Lu Hui,Wang Xian-Ping,Gao Yun-Xia,Liu Wang,Zhuang Zong,Guo Li-Jun,Fang Qian-Feng
Garnet-like Li 6.8 La 3 Zr 1.8 Bi 0.2 O 12 (LLZBO) + x mol.% Al 2 O 3 ( x = 0, 1.25, 2.50) lithium ionic electrolytes were prepared by conventional solid state reaction method under two different sintering temperatures of 1000°C and 1100°C. XPS, induced coupled plasma optical emission spectrometer (ICP-OES), XRD and AC impedance spectroscopy were applied to investigate the bismuth valance, lithium concentration, phase structure and lithium ionic conductivity, respectively. Electrical measurement demonstrated that ionic conductivity of Al-added LLZBO compounds could be obviously improved when the sample sintering temperature increased from 1000°C to 1100°C. The highest ionic conductivity 6.3×10 -5 S/cm was obtained in the LLZBO-1.25%Al sample sintered at 1100°C, in consistent with the lowest activation energy 0.45 eV for the lithium ion migration. The mechanism related with good ionic conductivity in the Al-added LLZBO sample was attributed to the lattice distortion induced by the partial Al substitution at Zr sites, which is helpful to improve the migration ability of Li ions in lattice.
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高影响因子
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