ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Yang Nan,Wen Li,Shaojie Li,Qi Wei,Weiping Li
Aluminum coating is a potential candidate for cadmium coating replacement due to its excellent corrosion resistance and nontoxicity. Among the fabrication methods of Al coating, plating Al via ionic liquids has drawn major attention of researchers because of the superiority of controllability, stability and low energy consumption. However, the evolution rules of plating aluminum on high-strength steel via pulse current modes at room temperature requires deeper investigation. In this work, pulse current density and pulse duty factor are regulated to reveal the plating patterns of Al on 300M high-strength steel in AlCl 3 -EMIC (2:1 in mole) ionic liquid. It is found that higher current density can significantly facilitate the nucleation of Al grains and the compactness of morphology, while an enlarged pulse duty factor tends to result in more regular Al crystals. When the current density and the pulse duty factor are fixed at 20 mA cm −2 and 80 %, the densest and most uniform aluminum coating is obtained. The component of Al coating is verified to be pure Al crystals with good adhesion and the plating process achieves a high current efficiency of 97.27 %. Under the protection of Al coating, the impedance and galvanic corrosion current density of 300M steel substrate are optimized by two orders of magnitude, and the corrosion current density is markedly decreased from 5.58 μA cm −2 to 0.77 μA cm −2 .
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 8
·4925-4934
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IF 3.945
B. Meng,Q. S. Fu,X. H. Chen,G. S. Gong,C. Chakrabarti,Y. Q. Wang,S. L. Yuan
A series of polycrystalline NiCr2−xAlxO4 (0.1 ≤ x ≤ 0.25) spinel ceramics have been synthesized using a sol–gel method. DC magnetization measurements are carried out at different temperatures and magnetic fields. A novel magnetization reversal has been observed in the field cooling process for the x = 0.2 sample, which can be ascribed to the competition between two magnetic sublattices due to their different temperature dependences. The magnetic interaction evolution, related to the complex magnetic properties, is revealed by exchange constants that have been estimated according to ferrimagnetic Curie–Weiss fitting and mean field theory. The fitting result confirmed the evolution of antiferromagnetic and ferromagnetic components with Al substitution, which is supported by the observations from the isothermal magnetization measurements. The positive and negative values of the magnetic moment can be utilized for storage applications based on the results of magnetic switching effect measurements.
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JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2016
·Vol. 26
·期 1
·51-60
·
IF 1.094
Hu Jiaoyu,Liu Jun,Wang Chunxia,Tang Xin
The core/shell nano-TiN-coated Al powders (TiN/Al) were prepared and added into A356 alloy by ultrasonic-assisted casting method in this work. The results show that TiN/Al has a better dispersion in A356 matrix and a stronger strengthening effect than TiN without the core/shell structure. With the addition of TiN/Al, most of the coarse primary α-Al dendrites of A356 turn into equiaxial. After T6 heat treatment, it is found that eutectic silicon in A356 with TiN/Al becomes columnar or globular in shape and smaller in size, which causes a greatly enhanced elongation of 11.7%. The results also suggest that the addition of nanoparticles can affect the precipitation behaviors and change the shapes and sizes of the precipitation.
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Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 46
·24579-24589
·
IF 11.301
Yongkang Han,Jinmei Xu,Wei Wang,Fu Long,Qunting Qu,Yan Wang,Honghe Zheng
Interfacial modification is one of the most important technologies to improve the overall electrochemical properties of Ni-rich cathodes. Herein, a novel strategy of in situ planting of an electrolyte film-forming additive on a single crystal NCM811 surface is proposed by consuming the residual lithium to develop a functional Al(Li)BOB nano-layer. Different from traditional physical coating, this approach cleverly consumed the undesirable residual lithium on the NCM811 surface. The in situ grown 30–50 nm Al(Li)BOB layer on the single crystal NCM811 cathode surface contributes to its much enhanced electrochemical performances. At a high operating voltage (charge voltage limit of 4.5 V vs. Li/Li+), the capacity retention is greatly increased from 57.0% to 83.5% after 295 cycles. Meanwhile, the incorporation of aluminum is effective in improving the thermal stability of the Ni-rich cathode. The novel interfacial strategy by in situ implanting of an electrolyte additive is of important significance for solving the critical interfacial issue for Ni-rich cathode materials.
研究领域:
材料科学
·
电化学
·
能源存储
·
锂离子电池
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界面工程
·
纳米材料
·
固态化学
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Zhiqiang Zhu,Qi Xu,Xiang Li,Shengdi Zhang,Chunxi Hai,Yuan Zhou
Ca-looping-driven thermochemical energy storage (TCES) materials are highly promising options for next-generation concentrated solar power (CSP) applications. However, the heat storage performance of pure Ca-based materials largely deteriorates after repeated cycles, reducing the operational lifespan of CSP plants. To improve the cycling stability of TCES materials, a sol–gel-based strategy is developed that introduces Al and Ce into CaCO 3 powders. After 50 cycles, the conversion rates of CaCO 3 -based composites exceed 80 % and the heat storage densities reach 1600 kJ/kg, with the composite with a Ca:Al:Ce molar ratio of 100:10:2.5 exhibiting exceptional stability. This high performance is attributed to oxygen vacancies generated by Ce 3+ and the porous structure preserved by Al 3+ throughout the cycling process. Furthermore, the adsorption energies of the CaO-based composites (pertaining to the (002) plane) are calculated using density functional theory. The results showed that the N-10 M ratio can decrease the adsorption energy of CaO for CO 2 from −1.5006 to −1.6718 eV and shorten the bond length between C CO2 and O CaO from 1.41 to 1.38 Å. Furthermore, PDOS curves of C and O on N-10 exhibit a significant shift toward lower energy regions. These results demonstrate that the addition of Al and Ce can enhance the CO 2 -capture capacity. Alongside presenting a new doping strategy, this study elucidates the microscopic physical mechanism by which Al and Ce improve the properties of CaO-based materials, offering valuable guidance for developing high-performance TCES materials for CSP applications.
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FUEL
·
2025
·
IF 7.5
Xuwen Wang,Jian Zhang,Hao Bai,Changsheng Tang,Jiayan Liang,Zhe Shi,Kaifeng Lin,Debin Xia,Bowen Tao,Fang Du,Yulin Yang
The combustion of aluminum in solid propellants is inherently hindered by its surface oxide shell, leading to ignition delay, particle agglomeration, and low combustion efficiency. Herein, an onion-structured Al@Na 3 AlF 6 @AP composite is synthesized via a two-step evaporation-induced self-assembly process, sequentially depositing cryolite (Na 3 AlF 6 ) and ammonium perchlorate (AP) onto the aluminum surface. The Na 3 AlF 6 interlayer functions as a temperature switch inducing the transformation of the Al 2 O 3 into Al 6 NaO 9.5 at 700 °C and simultaneously exposing the active aluminum core. Therefore, the oxidation efficiency of Al@Na 3 AlF 6 is as high as 96.75 %, significantly surpassing the values achievable by pure aluminum and conventional aluminum alloys. Furthermore, the AP-encapsulated structure of Al@Na 3 AlF 6 @AP constructs a self-sustaining oxygen supply network during aluminum combustion and reduces the diffusion time of oxidative gases to the aluminum surface by 29.6 %. As a result, the size of aggregates during Al@Na 3 AlF 6 @AP combustion is approximately 10 μm, and the combustion heat (19.532 ± 0.133 MJ kg −1 ) is 8.4 % higher than that of the physically mixed sample Al@Na 3 AlF 6 /AP. The unique onion structure and Na 3 AlF 6 “Temperature Switch” both fundamentally reshape combustion kinetics, shifting the rate-limiting step from oxygen diffusion to aluminum oxidation activation.
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International Journal of Electrochemistry
·
2026
·Vol. 2026
·期 1
·1709523
·
IF 4.2
Zarin Tasnim Promy,Zhiqian Wei,Lixin Song,Pingfan Du,Jie Xiong
Electrodes with high surface area, rapid charge transport, and mechanical robustness are essential for high-performance supercapacitors. In this study, a flexible Ni/Ni–Al layered double hydroxide/activated carbon cloth (Ni/Ni–Al–LDH/ACC) electrode was fabricated through a two-step process comprising potentiostatic Ni electrodeposition followed by hydrothermal growth of Ni–Al–LDH on ACC. The hybrid architecture enhanced ion diffusion and electron transport, leading to significantly improved electrochemical performance. The Ni/Ni–Al–LDH/ACC electrode delivered a high specific capacitance of 867.50 F/g@0.40 F/cm 2 at 7.00 mA/cm 2 , with an energy density of 27.00 Wh/kg and a power density of 3.33 × 10 3 W/kg, retaining 91.20% of its capacity during cycling. An aqueous asymmetric supercapacitor assembled using Ni/Ni–Al–LDH/ACC//ACC exhibited a specific capacitance of 7.68 F/g@0.74 F/cm 2 , together with an energy and power density of 1.91 Wh/kg@726.70 W/kg and a cycling stability of 86.50%. These results demonstrate the material’s strong potential as a low-cost, flexible, and high-efficiency electrode for next-generation energy-storage devices.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Dong-Gyu Lee,Baoling Huang,Qing Chen
Metal foils that alloy with lithium have attracted renewed interest as the issue of continuous solid-electrolyte interphase (SEI) growth can be effectively addressed with solid-state electrolytes (SSEs). However, an impractically high pressure is required to maintain the contact between the foils and inorganic SSEs. Here, we show that a soft polymer solid electrolyte can also alleviate the issue of SEI growth for an Al foil anode at a practically low pressure. Unlike liquid electrolytes, the polymer PVDF-HFP does not infiltrate pits and pores formed during Al lithiation, leading to a more uniform reaction and insignificant SEI growth deep in the anode, as shown by microstructural and compositional analyses of both the surface and the cross section of the anode. It thereby significantly boosts the Coulombic efficiency and the cycling stability of the Al foil anode compared to its liquid counterpart. The work unveils a new path to stabilize alloy anodes for safe, inexpensive solid-state batteries.
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PubMed
高影响因子
PLANT PHYSIOLOGY AND BIOCHEMISTRY
·
2026
·
IF 6.2
Su Li,Qi Jiang,Yong Qiang Gao,Ren Fang Shen,Qing Song Zheng,Xiao Fang Zhu
Aluminum (Al) toxicity in acidic soils significantly limits crop productivity by inhibiting root growth and nutrient uptake. Brassinosteroid (BR), a key plant hormone, has emerged as a crucial regulator of stress tolerance. This study investigates the role of BR in mitigating Al toxicity in rice ( Oryza sativa ) and explores the interplay between BR and gibberellic acid (GA) under Al stress. Our results show that Al stress rapidly elevates endogenous BR level in rice roots, which alleviates Al-induced root growth inhibition. Specifically, 0.01 μM BR achieves a maximum remission rate of approximately 20% for Al-induced root growth inhibition. BR application significantly reduced Al accumulation in root tips (by approximately 25%) and cell walls, particularly by inhibiting the overexpression of XYLOGLUCAN ENDO TRANSHYDROLASE/GLUCOSYLASE 5/9/11/19 ( OsXTH5/9/11/19 ), which reduces Al binding in hemicellulose fractions and upregulating Cellulose synthase A catalytic subunit 4/7/9 ( OsCesA4/7/9 ) to enhance cell wall’s barrier function against Al. BR also modulates hemicellulose composition and suppresses the expression of the Al transporter gene Nramp aluminum transporter 1 ( OsNRAT1 ), thereby reducing Al uptake into root tip cells. Additionally, BR mitigates Al toxicity via the GSK3/SHAGGY-Like KINASE 2 ( OsGSK2 )-mediated BR signaling pathway: OsGSK2 overexpression lines ( OsGSK2-OE ) exhibit enhanced Al resistance, while RNAi lines ( OsGSK2-RNAi ) show increased Al sensitivity. Furthermore, BR upregulates key expansin genes ALPHA-EXPANSIN 1/4/7 ( OsEXPA1/4/7 ) and BETA-EXPANSIN 2 ( OsEXPB2 ), which promotes root growth under Al stress. Notably, under Al stress, BR enhances endogenous GA levels through the transcription factor BRASSINAZOLE RESISTANT 1 ( OsBZR1 ): Al represses OsBZR1 expression, which is rescued by BR treatment. This process involves upregulating GA biosynthetic genes such as OsGA20OX , restoring Al-suppressed gene expression, and mitigating Al-induced OsGA2OX overexpression to maintain GA homeostasis. Exogenous GA treatment mimics BR’s alleviatory effects, highlighting critical crosstalk between the BR and GA pathways. This study provides novel insights into BR-mediated Al detoxification, revealing a key BR-GA interaction that enhances Al tolerance in rice and offers potential for improving crop resilience in acidic soils.
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JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Xun Yuan,Meiting Huang,Qun Cao,Yifeng Li,Haoxuan Yu,Lihua Wang,Liang Chen,Guang Yang,Tian Liu,Xubiao Luo,Liming Yang
High level endogenous Al impurities in S–NCM622 are directly doped into NCM. • The regeneration process does not require additional agents. • The molten–salt strategy enabled rapid Li replenishment and Al incorporation. • Al doping stabilizes lattice oxygen and reinforces the layered structure. • The R–NCM622–Al sample exhibits outstanding electrochemical performance. Direct regeneration of severely damaged LiNi 1-x-y Co x Mn y O 2 (NCM) cathodes are commonly limited by the intrinsic instability and high chemical consumption. Meanwhile endogenous Al remaining during the regeneration process can be directly utilized as effective dopants for NCM regeneration. Yet, current endogenous Al doping strategies commonly lack efficient control over the Al doping pathway and exhibit unsatisfactory charge–discharge performance of regenerated NCM. Herein, we propose an one step thermal diffusion driving endogenous Al doping strategy for the upgraded regeneration of severely degraded LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622). The regenerated Al–doped NCM622 exhibits enhanced structural stability, thus showing excellent cycling stability. Specifically, it delivers a high initial discharge capacity of 183.9 mAh g −1 , along with an ultralow capacity fading rate of 0.0577% per cycle over 300 cycles. Such excellent performance is attributed to as high as 2 wt% Al doping, which significantly suppresses lattice oxygen diffusion and enhances the structural robustness. This work provides a practical and scalable strategy for the advanced regeneration of severely degraded NCM by utilizing endogenous Al impurities, offering a new perspective for overcoming the challenges of regenerated NCM cathodes. An upgraded regeneration strategy utilizing endogenous Al doping is developed for S–NCM622, in which thermally diffused into the lattice assisted by a eutectic molten salt, enabling concurrent lithium replenishment, Al doping and structural restoration to achieve high performance NCM622. Download: Download high-res image (472KB) Download: Download full-size image
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ACS Omega
·
2026
·
IF 5.2
Liyuan Wang,Bingbing Lai,Xiaoyu Wang,Bo Dai,Yujuan Zhang,Wenjing Lou
Traditional bentonite grease suffers from inadequate tribological properties. Layered double hydroxides (LDHs) have great potential as lubricant additives owing to their unique lamellar structure, tunable chemical composition, and high anion-exchange capacity, which enable strong interfacial interactions and stable dispersion in lubricating media. In this study, Mg Al-layered double hydroxide (MA-LDH) was synthesized as a crystalline lamellar compound with a controllable morphology and particle size. MA-LDH was prepared under hydrothermal conditions at pH 8–12 and 120–180 °C. The effects of MA-LDH synthesis conditions and additive concentration on the properties of bentonite grease were systematically investigated. Scanning electron microscopy revealed that the particle size distribution of MA-LDH became increasingly nonuniform as the pH and hydrothermal temperature increased. MA-LDH synthesized at pH 10 and 120 °C exhibited excellent particle size uniformity and dispersibility. Within the investigated additive range (0.1–12 wt %), an MA-LDH concentration of 1.5 wt % produced the best tribological performance. Compared with the base bentonite grease, the grease containing 1.5 wt % MA-LDH showed a 34.2% reduction in average coefficient of friction, an 89.2% decrease in wear volume, and a 150% increase in load-carrying capacity. The incorporation of MA-LDH optimizes load distribution, facilitates interfacial sliding, and enhances the film-forming ability, thereby improving the tribological performance of the bentonite grease.
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DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2026
·
IF 7.3
Yunjia Hu,Renli Fu,Zeya Huang,Meng Meng,Jindan Tian,Xing Gao,Yunan Liu
This study developed a soldering process for joining Al to Cu-metallized ceramic substrates, aiming to overcome the formation of brittle intermetallic compounds in Sn-based solders, which usually lead to low joint strength. Zn foils coated with Sn-10Zn or Sn-20In solders were used as hybrid solders to bond Ni-plated Al components to Cu-metallized Al 2 O 3 substrates at 220 °C. With increasing soldering time, the solder on the Zn surface gradually transformed into NiZn 3 , and the formation mechanism of the NiZn 3 phase was analyzed from thermodynamic and kinetic perspectives. The shear strength of the joints increased with prolonged soldering times, reaching a maximum of 67 MPa for the Sn-10Zn/Zn solder at 240 min. In the Sn-10Zn joints, NiZn 3 formed a continuous transition layer that effectively reduced stress concentration. In contrast, the Sn-20In/Zn joints showed discontinuous NiZn 3 layers and significant interfacial stress, resulting in lower shear strength.
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