JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Peibo Li,Guoqiang Luo,Guinan Zhao,Huawu Liu,Yi Sun,Qiang Shen
Al powder is prone to oxidation, which can introduce impurities in powder metallurgy. In this study, Al 2 O 3 nanonetworks were obtained by destroying the oxide layer through Paulse Activated Sintering (PAS). The network and the nano-precipitation enhance the mechanical properties of Al-Cu-O composites. TEM analysis revealed the formation of CuAl 2 and an Al 2 O 3 network at the grain boundaries. The current facilitated the modulation of the intermetallic compound size and the fragmentation of the oxide layer. The current-induced discharge at the particle interfaces generated localized heating. Higher temperature effectively disrupts the oxide layer. The Al 2 O 3 network improved the fracture toughness of the Al-Cu-O composites by passivating crack propagation. Simultaneously, the current reduced the nucleation barrier for precipitation by promoting directional atomic migration. Uniformly dispersed nano-precipitates are conducive to the improvement of strength. This study provides new insights into oxidation-related challenges in Al powder.
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Energy Technology
·
2019
·Vol. 8
·期 1
·1900936
·
IF 3.163
Hao Tian,Xiaodeng Wang,Haiyun Li,Mingyu Pi,Dingke Zhang,Shijian Chen
The surface wettability of an electrocatalyst plays an important role in electrocatalysis of the hydrogen evolution reaction from water splitting. Herein, Al-doped NiP 2 nanosheets are synthesized on carbon fiber paper (Al–NiP 2 NSs/CFP) with a superhydrophilic and aerophobic surface as a hydrogen evolution reaction electrode. The Al–NiP 2 NSs/CFP electrode exhibits superior hydrogen evolution activity with a low overpotential of 58 mV to achieve 10 mA cm −2 in 0.5 m H 2 SO 4 . In particular, it even exhibits better electrochemical performance than commercial Pt/C electrodes at high current densities. Theoretical calculations indicate that Al dopants can alter the electronic structures and optimize the hydrogen adsorption free energy of NiP 2 . The superhydrophilic and aerophobic surface favors the H 2 bubbles release from the electrocatalyst surface and promotes the hydrogen evolution reaction (HER) performance at high current densities. Potential ways to fabricate efficient non-noble metal electrocatalyts for large-scale industrial hydrogen production applications are provided through electronic structure engineering and surface constructing.
研究领域:
材料科学
·
电化学
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高影响因子
Science China-Materials
·
2023
·Vol. 66
·期 11
·4295-4305
·
IF 8.1
Rong Xudong,Li Yue,Chen Xiaofeng,Zhang Xiang,Zhao Dongdong,He Chunnian,Zhao Naiqin
Incorporating reinforcements can improve the mechanical properties of Al matrix composites but make them susceptible to corrosion attacks by facilitating the formation of a galvanic cell network along the interface. The optimization of the interfacial structure improves the corrosion resistance of the composites. Herein, a solid-state thermite reaction integrated with a heat treatment strategy was developed to create plain interfaces, encompassing the grain boundary (GB) and reinforcement–matrix interface, in an Al–CuO composite system. The intergranular corrosion behavior and susceptibility to stress corrosion cracking of the composite were comprehensively examined by immersion/electrochemical corrosion tests and microstructural characterizations. The intragranular distribution of nanosized secondary phases, i.e., Al 2 O 3 and precipitates, was investigated to address their contribution to the continuous galvanic cell detachment along the GBs and interruption of the corrosion path, thus boosting the corrosion duration. In addition, the tightly bonded Al 2 O 3 –Al interface with low strain energy distinctly lowers local susceptibility to corrosion. This study illuminates the correlation between interface characteristics and corrosion mechanisms in the composites, which can shed light on the development of high-corrosion-resistant composites.
研究领域:
材料科学
·
腐蚀工程
·
复合材料
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DOI
高影响因子
ACS Nano
·
2026
·
IF 17.3
Zixiang Meng,Yuhan Zou,Jiashu Chen,Yongbiao Mu,Yan Li,Yuyuan Wang,Qian Liu,Yuyang Yi,Lin Zeng,Guangping Zheng,Shixue Dou,Jingyu Sun
Al current collectors are widely adopted in nonaqueous batteries because of their low cost, high conductivity, and low density, yet their deployment in aqueous congeners (i.e., Zn-ion batteries) is largely precluded by concurrent issues of surface passivation and electrolyte-driven corrosion. Here, an on-site N-doped carbon-skinned Al current collector (NC@Al) is developed to resolve this longstanding dilemma. Enabled by an ultrafast Joule heating process, elevated temperature carbonization could be completed in seconds without thermally deforming the Al substrate, which renders a dense and continuous double-sided NC overlayer, affording favorable interfacial adhesion. Combined theoretical calculations and experimental diagnostics verify the NC overlayer simultaneously helps suppress the Al passivation–corrosion issue and promote uniform Zn deposition. As a result, symmetric cells based on NC@Al exhibit durable cycling beyond 3500 h at 0.5 mA cm–2/0.25 mAh cm–2. When paired with an iodine cathode, our constructed pouch cells with an active material loading of 25 mg cm–2 sustain stable operation for 1000 cycles under a stringent N/P ratio of 1.77. Technoeconomic analysis further highlights the energy-efficiency advantage of our route in practical manufacturing. This work establishes a strategy for employing commercially available Al current collector materials toward aqueous batteries.
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DOI
PubMed
高影响因子
Chinese Physics B
·
2022
·Vol. 31
·期 4
·046106
·
IF 1.652
Heng Yao,Anjiang Lu,Zhongchen Bai,Jinguo Jiang,Shuijie Qin
To improve the stability and luminescence properties of CsPbBr3 QDs, we proposed a new core-shell structure for CsPbBr3/CdSe/Al quantum dots (QDs). By using a simple method of ion layer adsorption and a reaction method, CdSe and Al were respectively packaged on the surface of CsPbBr3 QDs to form the core-shell CsPbBr3/CdSe/Al QDs. After one week in a natural environment, the photoluminescence quantum yields of CsPbBr3/CdSe/Al QDs were greater than 80%, and the PL intensity remained at 71% of the original intensity. Furthermore, the CsPbBr3/CdSe/Al QDs were used as green emitters for white light-emitting diodes (LEDs), with the LEDs spectrum covering 129% of the national television system committee (NTSC) standard color gamut. The core-shell structure of QDs can effectively improve the stability of CsPbBr3 QDs, which has promising prospects in optoelectronic devices.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Longyan Zhang,Gang Zhao,Xinming Wu
Molybdenum disulfide (MoS 2 ) has been widely studied in supercapacitors due to its high theoretical capacity, but the lower intrinsic conductivity limits its further application. In this paper, Al, P-doped MoS 2 was grown in situ on carbon cloth using a one-step hydrothermal method, respectively, and the implementation of the doping strategy increased the layer spacing of MoS 2 while synergistically improving the conductivity and specific capacitance of the material. The results show that Al, P doping not only enhance the conductivity of pristine MoS 2 by 35.8% and 21.1%, respectively, but also improve the specific capacitance from 284.4 F g -1 (at a current density of 0.5 A g -1 ) to 424.6 F g -1 and 449.2 F g -1 , respectively. Surprisingly, the ASC device assembled with Al 0.05 -MoS 2 as the positive electrode and P 0.05 -MoS 2 as the negative electrode achieved an energy density of 30.07 Wh kg -1 at a power density of 1259.99 W kg -1 . These results demonstrate the superiority of Al, P-doped MoS 2 nanoflowers for high-performance supercapacitor applications.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Jiandong Hao,Ling Li,Tingwei Yan,Jinchang Meng,Zhenxing Liu
Boron nitride (BN) is suitable for ultraviolet (UV) photodetection with its wide bandgap and high absorption coefficient. The research on fabrication process and performance optimization is urgent with the development of UV detection technology. In this work, the band structure, work function, charge distribution and transfer, and optical absorption coefficients of BN/Au and BN/Al interfaces are calculated based on the density functional theory. The results show that the BN monolayer gets more charges with the influence of Au. The charge transfer is 0.025e and 0.015e for BN/Au and BN/Al. The absorption coefficients of BN/Au is higher than that of BN/Al in the DUV region, which enhances the light absorption of BN. In addition, BN/Au and BN/Al DUV detector is fabricated by dry transfer method. The highest photo-dark current ratio (PDCR) of 115.04 and 29.09 are obtained for BN/Au and BN/Al at an optical power density of 1.21 mW/cm 2 ( V bias =10 V). The responsivity (R) and detectivity (D*) is up to 0.70μA/W and 1.55 × 10 8 Jones for the BN/Au. The rise and fall times (T r /T f ) are 0.12 s and 0.11 s, respectively. The DUV detector is fabricated with easy process, low cost and fast response. This provides theoretical support and technical reference for the next generation of high-performance devices.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 12
·885
·
IF 4.3
Chen Wu,Yuandong Xia,Kejing Song,Yongda Cao,Chenzhi Huang,Jiayi Chen,Yuan Wang,Chunliu Xu
Na2Ti3O7(NTO), with low sodium insertion potential (~0.3 V vs. Na+/Na) and potential for high-energy-density batteries, is regarded as one of the most promising anode materials for sodium-ion batteries (SIBs). However, its practical application is hindered by poor electronic conductivity, sluggish Na⁺ (de)intercalation kinetics, and interfacial instability, leading to inferior cycling stability, low initial Coulombic efficiency, and poor rate capability. In this work, micron-sized rod-like NTO and Al-doped NTO (NTO-Al) samples were synthesized via a one-step high-temperature solid-state method. Al doping slightly reduced the size of NTO microrods while introducing oxygen vacancies and generating Ti3+, thereby enhancing electronic conductivity and reducing ionic diffusion resistance. H2-TPR confirms that doping activates lattice oxygen and promotes its participation in the reaction. The optimized NTO-Al0.03 electrode delivered a significantly improved initial charge capacity of 147.4 mA h g−1at 0.5 C, surpassing pristine NTO (124.7 mA h g−1). Moreover, it exhibited the best cycling stability (49.5% capacity retention after 100 cycles) and rate performance (36.3 mA h g−1at 2 C).
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PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Yanhua Zhang,Fei Chen,Rong Tu,Qiang Shen,Lianmeng Zhang
High performance lithium ion conducting Li 7 La 3 Zr 2 O 12 solid electrolytes are prepared for the first time by field assisted sintering technology (FAST). The effect of sintering temperature on the phase compositions , microstructure and Li ionic conductivity is systematically investigated. The results show that pure cubic phase LLZO can be obtained at a range of temperatures from 1100 to 1180 °C for no more than 10 min. For the sample sintered at 1150 °C, a maximum relative density of 99.8% with a total ionic conductivity as high as 5.7 × 10 −4 S cm −1 are obtained at room temperature . This value is the highest among the present research. Compared with the traditional preparation methods, the current FAST is very promising to obtain high performance LLZO for its advantages of very short sintering time , a single preparation step of reaction-densification processing, and relatively lower sintering temperature.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 10
·105316
·
IF 1.449
Ruoyu Liu,Chuanbing Huang,Lingzhong Du,Hao Lan,Shige Fang,Weigang Zhang
Aluminium/polyimide (Al/PI) powders were prepared via in situ. Al/PI composites were fabricated by hot pressing technology at 723 K for 30 min under Ar. The microstructure, thermal stability and tribological properties of Al/PI composites were investigated. SEM images showed that Al particles were wrapped in the composite with no gap. According to the TG analysis, 15Al/PI composite showed excellent thermal stability up to 773 K. Meanwhile, 15Al/PI composites exhibited excellent tribological behaviour at high temperature, especially at 773 K. The friction coefficient of 15Al/PI composite at 773 K was about 0.28 which was lower than that of pure PI (about 0.41). The wear rate of 15Al/PI composite at 773 K was about 65 × 10−5 mm3 Nm−1. The tribological properties of Al/PI composites was improved at high temperature. In the process of sliding tests, Al particles were transferred to the Ti-6Al-4V alloy's surface and PI particles were pressed on the composite's surface. The transfer of Al can protect Ti-6Al-4V alloy from wear and reduce the friction coefficient during the sliding test.
研究领域:
材料科学
·
摩擦学
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DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 9
·2117
·
IF 3.2
Jiaxiong Li,Muqing Hou,Haiyuan Chen,Huan Yu,Jixue Zhou,Jianhua Wu,Xitao Wang
Al/diamond composites are considered a new generation of potential thermal management materials. In this study, the uniform B coating on the surface of diamond particles was prepared by the vacuum thermal diffusion method. Subsequently, Al matrix composites reinforced with B-coated diamond particles were produced by the gas pressure infiltration method. The plating time was varied from 0 to 120 min to investigate the effect of B coating on the thermal conductivity and thermal expansion of the Al/B-diamond composites. The thermal conductivity for the Al/B-diamond composites increased from 422 W/m·K to 562 W/m·K with prolonged plating time from 0 to 90 min. Correspondingly, the coefficient of thermal expansion was tailored from 7.0 × 10−6/K to 5.8 × 10−6/K. The enhanced thermal conductivity and decreased coefficient of thermal expansion were attributed to strong interfacial bonding in Al/B-diamond composites. The results indicate that the appropriate thickness of B coating is a viable method to improve interfacial bonding between the Al matrix and B-coated diamond particles.
研究领域:
材料科学
·
热管理技术
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 24
·11013-11025
·
IF 4.682
Luo Guoqiang,Li Peibo,Hu Jianian,Guo Jingwei,Sun Yi,Shen Qiang
The purpose of this paper was to design an Al–Cu–Ag–C material system to address the deterioration of mechanical properties caused by intermetallic compounds generated during Al–Cu sintering. The in situ pyrolytic C layer was encapsulated on the surface of the raw material particles, which prevented Al–Cu diffusion and reduced the generation of intermetallic compounds. The microstructure of the Al–Cu–Ag–C composites illustrates that several alloy phases of Al 2 Cu, Al 4 Cu 9 , and Ag 2 Al are formed. The addition of Ag significantly improved the mechanical properties of the composite due to the formation of the Ag 2 Al phase and Cu–Ag solution. The tensile strength and compressive strength of Al–52Cu–3Ag–C are increased by 123.9% and 64.9% over Al–52Cu–C, and the strain is also considerably improved. The strength enhancement derived from the Orowan strengthening contributed by Ag 2 Al, and the solid solution strengthening contributed by Ag–Cu solid solution, respectively. The presence of Ag 2 Al also enhances the hardness of the composite.
研究领域:
材料科学
·
力学
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DOI
高影响因子
危险品化学品经营许可证（带存储）