Journal of Materials Chemistry A
·
2026
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IF 9.2
Zhao Meng,Haibo Yang,Yongzhen Ma,Yan Cheng,Yanlong Ma,Binglong Zheng,Hongwei Zhou,Ying Lin
In increasingly complex electromagnetic environments, developing high-performance and dynamically tunable electromagnetic wave (EMW) absorption materials is essential. This study designed a pressure-responsive TiO2/CNFs@Co/C elastic aerogel for efficient EMW absorption. A 3D interpenetrating structure consisting of Ti3C2Tx MXene-derived TiO2 nanosheets, magnetic Co/C frameworks, and carbon nanofibers was constructed via electrospinning combined with in situ synthesis. This 3D interpenetrating structure constructs abundant heterogeneous interfaces, thereby enhancing interfacial polarization. The results demonstrate that the composite achieves an exceptionally broad effective absorption bandwidth (EAB) of 8.17 GHz at a thickness of 2.7 mm, with only 10 wt% filler loading. Additionally, the composite exhibits strong environmental tolerance, including hydrophobicity, stretchability, and thermal insulation. Notably, the alginate-induced elastic aerogels enable dynamic tuning from 6.4 to 18 GHz under compressive strains of 0% to 66%. This work designs dynamically tunable, high-performance EMW absorbers through component optimization and interface engineering, providing a promising strategy for the preparation of next-generation multifunctional intelligent EMW absorbers.
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高影响因子
CORROSION SCIENCE
·
2026
·
IF 10.3
Yunlei Lv,Yongsheng Liu,Binghui Zhang,Mengzhu Liu,Shaolin Fu,Yejie Cao,Jingxin Li,Yansong Liu,Zbigniew Pedzich
HfB 2 -SiC-MoSi 2 composites with varying MoSi 2 contents were fabricated via gel-casting molding combined with reactive melt infiltration (RMI) at a relatively low temperature of 1500℃, achieving high density with porosity less than 1 % and uniformly distributed constituent phases. The composites exhibited excellent oxidation resistance during isothermal oxidation at 1650 °C, with mass gains of 15.40, 8.50, 7.38, and 11.31 mg/cm² after 100 h. The oxide layer grew thicker and tended to be uniform and dense over time. The oxidation process all followed a parabolic law. The addition of MoSi 2 significantly reduced the oxidation rate. The mechanism is attributed to the fact that the oxidation of MoSi 2 can promote the formation of additional SiO 2 glass, facilitating the rapid development of a dense protective oxide layer, thereby effectively blocking oxygen diffusion and suppressing the formation of a SiC-depleted layer. An appropriate amount of MoSi 2 , specifically 20 wt% MoSi 2 , optimizes the fluidity of the glass layer and enhances pore filling; however, excessive MoSi 2 reduces HfO 2 content and weaken viscosity. The formation of the HfSiO 4 phase with high-melting-point further improves the structural stability and oxygen resistance of the oxide scale, extending the service life at 1650°C. This work provides valuable guidance for designing oxidation-resistant materials for prolonged aerospace applications.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.3
Zhuohan Zhang,Zhichao Yu,Lian Cong,Lixiang Ma,Yuan Li,Zhaoyang Liu,Yaokun Fu,Lu Zhang
MgH 2 exhibits significant potential as promising candidates for next-generation hydrogen storage solutions, owing to excellent hydrogen storage capacity. However, its high thermodynamic stability and kinetic barriers result in sluggish dehydrogenation kinetics and high dehydrogenation temperatures. Herein, oxygen vacancy (O V )-rich CeO 2 @C effectively weakens the Mg–H bond energy, which is manifested as the elongation of the Mg–H bond. Moreover, the O V -rich CeO 2 @C reacts with H 2 to form CeH 2.73 , which enhances hydrogen diffusion within the Mg/MgH 2 system. Meanwhile, the formation of CeH 2.73 promotes the formation of O V within the MgH 2 -CeO 2 @C, further facilitating the dehydrogenation of MgH 2 . Thereby, the synergistic effect of the O V -rich CeO 2 @C and CeH 2.73 lower the dehydrogenation temperature of MgH 2 and enhance kinetic performance. The MgH 2 -CeO 2 @C-3h behaves the most optimal dehydrogenation performance, achieving a release of 4.88 wt% H 2 within 10 min at 350 ℃. The initial dehydrogenation temperature of the MgH 2 -CeO 2 @C-3h is reduced to 274 ℃, and the dehydrogenation activation energy ( E a ) is lowered to 99.13 kJ mol –1 , compared to 327 ℃ and 160.7 kJ mol –1 for pristine MgH 2 . This work provides new insights into designing O V -rich metal oxide catalysts for MgH 2 .
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2016
·
IF 3.782
Yizhi Yan,Haolin Tang,Junsheng Li,Fan Wu,Tianbao Wu,Rui Wang,Dan Liu,Mu Pan,Zhizhong Xie,Deyu Qu
A novel cocoon-like Fe 2 O 3 @C nanoparticle was fabricated via a facile hydrothermally molecular self-assembly procedure. Compared to bare Fe 2 O 3 nanoparticles, the carbon coated Fe 2 O 3 nanoparticles exhibit higher specific capacity, excellent rate capacity and cyclic stability as the anode in lithium ion batteries . These cocoon-like Fe 2 O 3 @C nanoparticles carry enhanced lithium storage properties with a reversible capacity of 358 mA h g −1 after 150 cycles under the current density of 1000 mA g −1 , while the carbon-free bare Fe 2 O 3 can only deliver a much lower capacity of 127.6 mA h g −1 with a continuously decreasing trend. The excellent performance of Fe 2 O 3 @C is attributed to the coated carbon layers , which not only enhance the electronic conductivity but also reduce the stress upon the Fe 2 O 3 nanoparticles caused by the volume change during the charge/discharge process.
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高影响因子
ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Peng-Yuan Zhai,Shi-Xi Zhao,Hong-Mei Cheng,Jian-Wei Zhao,Ce-Wen Nan
Li 2 MnSiO 4 /C nanocomposites have been successfully prepared by a two-step method to accurately control the formation of the orthorhombic Pmnb phase, and phosphate substitution is used to improve the electrochemical performance of this cathode material . The structure and electrochemical properties are investigated using X-ray diffraction, scanning electron microscope and electrochemical tests. The crystal structure of this material is confirmed to be Pmnb polymorph and the average grain size is about 80–100 nm. The electrochemical tests indicate that Li 2.1 Mn 0.9 [PO 4 ] 0.1 [SiO 4 ] 0.9 /C nanocomposites deliver a discharge specific capacity of 216.9 mAh·g −1 after initial activation and it shows much enhanced electrochemical performance compared with Li 2 MnSiO 4 /C nanocomposites. Furthermore, the XRD patterns , HRTEM images and Raman analysis reveal the crystal structural changes of the two samples during cycling. Thus, this material has shown potential for high power applications in Li-ion batteries.
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高影响因子
Journal of Energy Chemistry
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2020
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IF 7.216
Yanfei Zeng,Yudai Huang,Niantao Liu,Xingchao Wang,Yue Zhang,Yong Guo,Hong-Hui Wu,Huixin Chen,Xincun Tang,Qiaobao Zhang
Dramatic capacity fading and poor rate performance are two main obstacles that severely hamper the widespread application of the Si anode owing to its large volume variation during cycling and low intrinsic electrical conductivity. To mitigate these issues, free-standing N-doped porous carbon nanofibers sheathed pumpkin-like Si/C composites (Si/C-ZIF-8/CNFs) are designed and synthesized by electrospinning and carbonization methods, which present greatly enhanced electrochemical properties for lithium-ion battery anodes. This particular structure alleviates the volume variation, promotes the formation of stable solid electrolyte interphase (SEI) film, and improves the electrical conductivity. As a result, the as-obtained free-standing Si/C-ZIF-8/CNFs electrode delivers a high reversible capacity of 945.5 mA h g −1 at 0.2 A g −1 with a capacity retention of 64% for 150 cycles, and exhibits a reversible capacity of 538.6 mA h g −1 at 0.5 A g −1 over 500 cycles. Moreover, the full cell composed of a free-standing Si/C-ZIF-8/CNFs anode and commercial LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NCM) cathode shows a capacity of 63.4 mA h g −1 after 100 cycles at 0.2 C, which corresponds to a capacity retention of 60%. This rational design could provide a new path for the development of high-performance Si-based anodes.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Chunru Li,He Song,Changming Mao,Hongrui Peng,Guicun Li
Antimony (Sb) is an attractive anode material for lithium-ion batteries with high theoretical capacity. However, its practical application is greatly hindered by the rapid capacity fading due to the large volume expansion during lithiation. Tuning the morphology of active materials at the nanoscale or designing reasonable components is essential to address this issue. Employing an antimony sulfide nanorod as semi-sacrificial template, here, we successfully synthesize one-dimensional MoS 2 sheets-decorated Sb@Sb 2 S 3 @C(MoS 2 -Sb@Sb 2 S 3 @C) nano-structure via facile thermal carbonization of Mo-polypyrrole complex coating film. During annealing, metallic Sb from the partial reduction of Sb 2 S 3 nanorods is embedded into amorphous carbon nanotubes that are derived from polypyrrole and simultaneously MoS 2 nanosheets forms on the surface of Sb-Sb 2 S 3 -C nanostructures. This unique hierarchical tubular composite not only can serve as robust skeleton frameworks for accommodating volume changes of metallic Sb and Sb 2 S 3 during cell cycling, but also are characterized by high electronic conductivity (because of the amorphous carbon nanotubes and metallic Sb) and abundant active sites, both of which are beneficial for the improvement of Li-ion storage properties. As expected, the MoS 2 -Sb@Sb 2 S 3 @C composite exhibit a high specific capacity (1596 mAh g −1 at 0.1 A g −1 ), high rate capability (481 mAh g −1 at 5 A g −1 and 355 mAh g −1 at 8 A g −1 ), and stable cycling performance (760 mAh g −1 maintained after 100 cycles at 1 A g −1 ). Our work potentially sheds some light on future development of alloy-type anodes for battery applications.
研究领域:
材料科学
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电化学
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纳米科技
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能源存储
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电池技术
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高影响因子
Nano Energy
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2014
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IF 10.211
Xiaolei Jiang,Huayun Xu,Jing Liu,Jian Yang,Hongzhi Mao,Yitai Qian
Hierarchical mesoporous Li 2 Mn 0.5 Fe 0.5 SiO 4 consisted of nanoparticles or nanoplates has been successfully synthesized for the first time by a hydrothermal method . Their carbon-coated composites are obtained by a heat treatment in the presence of citric acid. These composites were characterized by powder X-ray diffractometry, scanning and transmission electron microscopy , Raman spectroscopy , and thermogravimetric analysis . The lithium storage capacity and cycling performance of the optimized Li 2 Mn 0.5 Fe 0.5 SiO 4 /C composite are greatly enhanced when tested as a cathode material in lithium-ion batteries (LIBs). It exhibits a discharge capacity of 125 mAh g −1 after 60 cycles at a rate of 0.1 C. This superior electrochemical property could be ascribed to high purity and mesoporous structure of Li 2 Mn 0.5 Fe 0.5 SiO 4 , which greatly enhances the electronic conductivity as well as the diffusion coefficient of lithium ions .
研究领域:
材料科学
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电化学
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能源存储
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纳米材料
·
固体化学
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高影响因子
ELECTROCHIMICA ACTA
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2011
·Vol. 56
·期 27
·10204-10209
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IF 3.65
Chang Su,Lihuan Xu,Botao Wu,Cheng Zhang
In this work, LiFePO 4 /C composites were prepared in hydrothermal system by using iron gluconate as iron source, and two feeding sequences during the preparation were comparatively studied. The morphology, crystal structure and charge–discharge performance of the prepared samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and galvanostatic charge–discharge testing. The results showed that the feeding sequences and iron gluconate seriously affected the microstructures and electrochemical properties of the resulting LiFePO 4 cathodes in lithium ion batteries. The spindle-shaped LiFePO 4 with hierarchical microporous structure self-assembled by nanoparticles has been successfully synthesized by synthesis route B. In addition, the cell performance of the synthesized LiFePO 4 by synthesis route B was better than that of LiFePO 4 by synthesis route A. Specially at high rates, the superior rate performance of the spindle-shaped LiFePO 4 /C microstructure (LFP/C-B) was revealed. And special reversible capacities of ∼118 and ∼95 mAh g −1 were obtained at rates of 2 C and 5 C, comparing to ∼96 and ∼68 mAh g −1 for LFP/C-A.
研究领域:
材料科学
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电化学
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储能技术
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纳米材料
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高影响因子
Journal of Energy Storage
·
2026
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IF 9.8
Qingmiao Zhang,Hangcheng Yang,Binglin Zhang,Junyao Chang,Xiaozhong Du,Zishang Wang,Guiyin Xu,Lingjie Meng,Yu Chen,Hongkang Wang
Heteroatom doping and carbon coating are essential techniques for improving the conductivity and reaction kinetics of intercalation-type anode materials in lithium-ion batteries. However, it is difficult to achieve heteroatom doping and carbon coating at the same time through simple processes. Here, we propose a simple method to simultaneously achieve carbon-coating and P/S/N triple-doping by introducing polyphosphazene (PZS) as precursor. We first prepare PZS-coated titanium-based metal-organic frameworks (MIL-125), which can be readily converted into phosphorus/sulfur/nitrogen (P/S/N) co-doped carbon-coated titanium dioxide (TiO 2 ) nanocomposites (PSN-C@TiO 2 @C) by simple calcination under an inert atmosphere. The heteroatom doping and carbon hybridization synergistically enhance the conductivity and ion diffusion of the PSN-C@TiO 2 @C, which not only change the local charge density of the nanocomposite, but also generate more active sites. Benefiting from the above advantages, the well-designed PSN-C@TiO 2 @C anode exhibits significantly improved specific capacity and rate performance, maintaining high reversible specific capacities of 272.2 mA h g −1 after 1000 cycles at 1000 mA g −1 and 141.1 mA h g −1 after 2000 cycles at 5000 mA g −1 . This study presents a novel simplified method for multi-element-doping and carbon-coating, which can be generally applied for developing advanced electrode materials for energy storage application.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Feng Li,Dan Zhou,Yaoping Guo,Keng Xuan,Yingqi Wang,Ying Zheng,Xuegang Wang,Zhanxue Sun,Yadan Guo
The contamination of water by soluble hexavalent uranium (U(VI)) requires the development of highly active and stable treatment materials. This study presents a rational design for a heterostructured photocatalyst by coupling phosphorus-modified graphitic carbon nitride (PCN) with NiAl-layered double hydroxide (NiAl-LDH). The structural theory was that P-doping would tailor the optoelectronic properties of g-C₃N₄, while integration with NiAl-LDH would establish a synergistic system for concurrent adsorption and photoreduction. As anticipated, the P modification inhibited crystal growth and improved charge separation in g-C₃N₄, elevating its U(VI) reduction rate by 3.67-fold. The NiAl-LDH component provided a high-specific-surface-area substrate for pollutant enrichment. The resulting optimal NiAl-LDH/PCN composite formed a Type-II heterojunction, which directed efficient charge transfer between the two phases. Under simulated sunlight, the composite achieved high removal efficiencies of 96.0% for U(VI) and 95.2% for Cr(VI). The performance stems from a synergy where NiAl-LDH concentrates target ions at the interface, and PCN furnishes photogenerated electrons via facilitated charge transfer, thereby accelerating the photoreduction kinetics. The material also demonstrated robust reusability and effectiveness in treating actual wastewater, highlighting its strong potential for practical heavy-metal-ion remediation.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Hao-Yue Ma,Jun-Fei Gu,Xing-Chuan Li,Zhan Chen,Qi-Yu Fu,Francis Verpoort,Wen-Jie Mo,Zheng Liu,Cheng Chen,Soon Hyeok Hong,Zongkui Kou
The transition from petroleum-derived chemicals to sustainable alternatives has intensified interest in 2,5-furandicarboxylic acid (FDCA), a biomass-derived monomer for green polyester production. However, many non-noble metal catalysts for converting 5-hydroxymethylfurfural (HMF) to FDCA still require multistep syntheses and/or harsh oxidation conditions. Here, we report a straightforward molten-salt strategy to prepare nitrogen-doped porous carbon–supported cobalt catalysts (Co@N-C-x). Under ambient air at 90 °C in water, the optimized [email protected] catalyst affords complete HMF conversion and > 99 % FDCA yield, with a productivity of ~1.17 mol FDCA mol Co −1 h −1 , and retains 96.5 % yield in an initial 400-fold scale-up test. Mechanistic and kinetic analyses support a sequential pathway of HMF → HMFCA → FFCA → FDCA, with the FFCA-to-FDCA step being kinetically most demanding under the present conditions. Structure–activity analysis, together with atmosphere-dependent experiments, indicates that Co–Nₓ sites serve as the primary catalytic centers, while adjacent defect-rich surface sites (denoted as O₂-activation sites) promote dioxygen activation and facilitate stepwise oxidation. Density functional theory calculations further show that FDCA binds more strongly to the catalyst surface than the intermediates, which can hinder product desorption and contribute to the observed loss of activity upon recycling.
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高影响因子
危险品化学品经营许可证（带存储）