ADVANCED MATERIALS
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2026
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IF 29.1
Yang Hu,Xiaoyue Lu,Mingche Huang,Erhong Song,Bowen Chen,Feiyan Cai,Yuefan Xu,Yinjie Ruan,Chaobin Zeng,Ling Lin,Yan Gu,Yusheng Ding,Dewei Ni,Shaoming Dong
The initial oxidation stage of high-entropy carbides (HECs) is a decisive yet poorly understood “black box” that governs their ultimate performance for ultra-high-temperature applications. Here, we unveil a powerful strategy—predesigning carbon vacancies—to fundamentally enhance HECs oxidation resistance. By integrating in situ x-ray diffraction (XRD) and in situ transmission electron microscopy coupled with electron energy loss spectroscopy (TEM-EELS), we provide the first direct, atomic-scale visualization of oxygen atoms preferentially occupying these predesigned vacancies during the incipient oxidation stage, leading to the dynamic formation of a metastable metal–carbon–oxygen (M–C–O) interfacial layer. Our combined experimental and theoretical analyses reveal a dual enhancement mechanism: kinetically, M–C–O suppresses both oxygen adsorption on the (111) surface and its subsequent inward diffusion; thermodynamically, they stabilize the HEC lattice at elevated temperatures, thereby increasing the energy barrier for M─C bond cleavage. This work not only deciphers the atomistic origin of enhanced oxidation resistance but also establishes a simple, general, and efficient design principle for next-generation ultra-high-temperature ceramics.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2026
·Vol. 37
·期 20
·1562
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IF 3.2
Guo Sijia,Qin Jianguo,Liu Xiangdong,Yang Chuanhua,Song Baisen,Zhu Yongchang,Li Zizhou
Lightweight broadband microwave absorbers with strong attenuation remain challenging because efficient absorption requires balanced impedance matching and electromagnetic loss over a wide frequency range. Herein, hierarchical core–shell BCN@CoNi@PANI (BCNPa) composites were rationally designed by integrating BCN, CoNi alloy, and conductive PANI. BCN serves as a lightweight dielectric substrate, CoNi provides magnetic loss, and the outer PANI shell regulates dielectric response and conductive loss. The electromagnetic properties of BCNPa can be effectively tuned by adjusting the PANI content. The excellent absorption performance over 2–18 GHz originates from the synergistic effects of impedance matching, dielectric loss, magnetic loss, and hierarchical structural attenuation. Dielectric loss is mainly related to defect-induced dipole polarization, interface-related polarization relaxation, and conductive loss from the π-conjugated PANI shell, while magnetic loss arises from natural resonance, exchange resonance, and eddy current loss of CoNi. Benefiting from optimized dielectric–magnetic balance, BCNPa-2 achieves ultralow minimum reflection loss ( RL min ) of − 81.4 dB at 14.12 GHz and an ultrabroad effective absorption bandwidth ( EAB ) covering nearly the entire measured range. This work provides an effective strategy for high-performance broadband microwave absorbers.
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ELECTROCHIMICA ACTA
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2026
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IF 5.8
Yu-Han Yuan,Jia Liang,He-Jie Wu,Gui-Fang Li,Shuang-Lin Cai,Jin-Wei Yan,Hai Huang,Ye Zeng,Ming-ming Tao,Xiao-hong Fan,Yi Li,Ding-Rong Deng,Qi-Hui Wu
F-CN@RGO presents multi-dimensional synergy between the conductive framework and heteroatom doping. • F-doping induces lattice distortion, optimizes the electronic structure, enhances redox kinetics. • It exhibits outstanding long-cycle stability, with a capacitance retention of 86.8% after 30,000 cycles. • The asymmetric supercapacitor achieves a high energy density of 87.75 Wh·kg −1 and excellent cycling stability. Supercapacitors possess exceptional capacity to transfer energy quickly, but increasing cycle stability and energy density is still a major problem that hinders their commercial applications. This study uses a one-step hydrothermal method to build and construct a fluorine F-doped three-dimensional (3D) Co 2 NiO 4 @reduced graphene oxide (RGO) heterostructure (referred as F-CN@RGO) on the nickel foam (NF) electrical collector. RGO-wrapped NF functions as 3D conductive framework that suppresses the volume strain during long-term cycling while simultaneously improving the electron transfer efficiency, electrical conductivity, and specific surface area. F-doping regulates the electronic structure, surface properties, and chemical stability of Co 2 NiO 4 @RGO. The high electronegativity of F ions accelerates the electron transfer, induces the lattice distortion of Co 2 NiO 4 @RGO, and consequently modulates its electronic structure and interfacial reaction kinetics. Electrochemical tests show that the activated F-CN@RGO (A-F-CN@RGO) has a high specific capacitance of 8.76 F·cm −2 (5 mA·cm −2 ). After 30,000 cycles, the asymmetric supercapacitor with A-F-CN@RGO and activated carbon as the electrodes retains 88.2% of its initial capacitance. By generating multi-dimensional synergistic effects with rational design structure between the substrate and active materials as well as heteroatoms and host materials, this work offers a universal technique for the controlled production of high-performance electrodes for supercapacitors. Download: Download high-res image (403KB) Download: Download full-size image
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ADVANCED FUNCTIONAL MATERIALS
·
2026
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IF 19.9
Dengke Wang,Xin Song,Siyuan Ye,Yu Chen,Haochen Liao,Zihan Wang,Ruizhi Lin,Sehan Cheng,Chaowei Li,Kai Zhang,Yagang Yao
Aqueous zinc-ion batteries (AZIBs) hold great promise for stationary energy storage, yet their practical deployment is critically impeded by the uncontrolled dendritic growth and parasitic side reactions. Here, we report an interfacial dual-coordination strategy to induce Zn deposition along the Zn(002) facet and suppress the parasitic side reactions. By employing lactic acid (Lac) to pretreat commercial Zn foil, we construct a chemisorbed interface that serves a synergistic “inhibition-guidance” function: the carboxyl group (-COO − ) forms strong bidentate coordination to passivate high-energy Zn (100)/(101) facets, while the hydroxyl group (-OH) establishes a low-energy diffusion pathway on the Zn (002) facet to guide Zn 2+ migration. This intrinsic regulation induces a highly selective Zn (002)-preferred growth, resulting in a dendrite-free lac@Zn anode. Consequently, the lac@Zn symmetric cell achieves a long lifespan of 4900 h (1 mA cm −2 , 1 mAh cm −2 ) and 500 h (5 mA cm −2 , 5 mAh cm −2 , DOD = 37%). Besides, the lac@Zn//MnO 2 full cell delivers exceptional reversibility with 76% capacity retention after 3000 cycles, and a pouch cell presents a high discharge capacity of 0.2 Ah. This work offers a new perspective for developing ultradurable and scalable Zn anodes through precise interfacial engineering.
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Minerals
·
2026
·Vol. 16
·期 7
·740
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IF 2.7
Yufeng Wang,Jinhao Tang,Mengchao Sang,Jia Tian,Jiale Li,Haisheng Han,Wei Sun,Jun Peng,Zhiyuan Yu
Arsenic-alkali leaching residue (AAR), generated during antimony smelting, is a hazardous solid waste containing arsenic and antimony. Its safe disposal and resource-oriented utilization are constrained by the strong stabilization of As- and Sb-bearing species in a high-alkali matrix. Herein, we investigated the alkali locking effect during carbothermal roasting of AAR and proposed a SiO2-assisted roasting strategy to promote the simultaneous volatilization of arsenic and antimony. Thermodynamic calculations indicate that, in a sodium-rich roasting system, representative As- and Sb-bearing species preferentially transform into thermodynamically stable Na3AsO4and Na3SbO4, thereby suppressing their reductive conversion into volatile As2O3and Sb2O3. Direct roasting experiments confirmed that simply increasing roasting temperature, carbon dosage, or roasting time was insufficient to achieve efficient simultaneous volatilization of As and Sb, which experimentally supports the existence of the alkali-locking effect. The introduction of SiO2weakened sodium-induced immobilization by favoring the formation of sodium silicate phases, thereby enhancing the thermodynamic driving force for the generation and release of As2O3and Sb2O3. Under the conditions of 900 °C, 90 min, 30% carbon dosage, and 10% SiO2addition, the volatilization rates of arsenic and antimony reached 93.25% and 93.80%, respectively. XRD and SEM-EDS revealed that the addition of SiO2promoted the reconstruction of Na–Al–Si-bearing phases and the development of porous slag structures, thereby facilitating the mass transfer and volatilization of As/Sb species. Preliminary co-roasting experiments with flotation antimony concentrate suggest the feasibility of using Si-bearing gangue as an in situ additive for AAR treatment. This study provides a thermodynamic and experimental basis for the resource-oriented detoxification of arsenic-alkali leaching residue.
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MATERIALS LETTERS
·
2026
·
IF 2.6
Xianjie Liu,Sijun Huang,Zhongzhi Yang,Jing Zhang,Qiuquan Zhang
Goose eggshell membrane (GESM) was taken as a flexible base material, residual egg white taken as a binder, and rGO taken as the thermo-sensitive component. Therefore, a high-sensitivity flexible temperature sensor is constructed by a simple coating method. This sensor displays an excellent flexibility. Its tensile strength is got an enhancement of 13.4% when compared with original GESM. This device gives a high temperature coefficient of resistance ( TCR ) which is −1.09%/°C, good linear property ( R 2 = 0.985), and a quick response time of 6–10 s. This sensor can keep its steady working condition after ten cold-heat change circles (25 and 46 °C), and it also can do this under repeated bendings with many different angles. This sensor holds significant potential for temperature monitoring applications.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2026
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IF 6.3
Changxiang Xie,Bingzhu Wang,Yonghui Yu,Wenhao Dou,Jing Guo,Haiwang Wang,Jianjun Sha
UHTCs are expected to be widely used in the aerospace industry due to their excellent ablation resistance. Currently, the low-temperature densification technology for 3D carbon fibre reinforced UHTCs is relatively scarce, meanwhile the long-term and high-temperature ablation-resistant materials still require further development. Herein, combining with reactive hot pressing at 1800 ℃, the highly dense 3D C f /ZrC-SiC composites were innovatively prepared through cyclic infiltration of slurry into 3D carbon fibre preform. The 3D C f /ZrC-SiC exhibited an excellent ablation resistance under a heat flux of 8.9 MW/m². By regulating the ratio of in situ phases ZrC and SiC, 3D C f /ZrC-SiC had an optimal mass ablation rate of only 0.75 mg/s and an optimal linear ablation rate of only -0.20 μm/s during the ablation process. The excellent ablation resistance was attributed to the formation of a dense ablation layer, which effectively inhibited the matrix from further ablation.
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VACUUM
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2026
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IF 4.3
Lvlv Gao,Enshen Zhang,Chen Chen,Rui Li,Yongchao Liu,Lei Zhou,Kai Chen,Junjie Chu,Shiliu Yang
Transition metal selenides (TMSes), such as bimetallic selenides, are potential anodes for sodium-ion batteries (SIBs) because of their satisfied redox performances. Nevertheless, the sluggish electrochemical reaction rate and large volume expansion hinder their widespread application. To solve these disadvantages, constructing heterostructure and hollow structure are considered effective strategies. In this work, a polyhedron-templated approach is developed to synthesize uniform Cu 2 O polyhedrons, which are subsequently converted into nitrogen-doped carbon coated CuFeSe 2 /Cu 2 Se (Cu-Fe-Se@NC) via solvent thermal and annealing method. The constructed abundant heterointerfaces accelerate Na + adsorption, while the unique hollow core-shell structure effectively relieves volume expansion. Furthermore, density functional theory (DFT) calculation results indicated that the Na adsorption energies of Cu-Fe-Se@NC were higher than those of CuFeSe 2 @NC and Cu 2 Se@NC. As a result, the Cu-Fe-Se@NC anode exhibited remarkable rate performance (303 mAh g −1 , 10 A g −1 ) and superior cycling stability. This work offers a practical pathway for designing high-performance TMSes anodes through strategic heterostructure and morphology control.
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Nature Communications
·
2026
·
IF 18.1
Huang Yi,Zhou Hongyu,Wang Jiajun,Zhang Jingfang,Guan Jiacheng,Wu Rui,Cheng Fangyi,Zhang Bin
Replacing the oxygen evolution reaction with more thermodynamically favourable organic oxidation reactions (OORs) can enable energy-efficient hydrogen evolution and hydrogenation. However, cathodic reduction rates are limited by sluggish OORs. Herein, we report a decoupled electrolysis strategy using a solid redox reservoir (RR) to realize an optimized hydrogen evolution reaction (HER) paired with valuable chemical synthesis. The decoupled system with a rechargeable capability features a HER coupled with RR oxidation for electricity storage, which is followed by the conversion of OORs (e.g., ethylene glycol, glycerol) into value-added chemicals coupled with the reduction of the oxidized RR to generate electricity. The fast kinetics of RR oxidation and membrane-free cell operation optimize the HER rate. The value-added chemicals and electricity are cocreated during the discharge process, offering more economic benefits. This decoupling design is universally applicable to other OORs-paired reduction systems (e.g., acetylene-to-ethylene semihydrogenation) to synthesize various chemicals for electricity storage and generation, paving a sustainable avenue for H 2 production/hydrogenation and chemicals manufacturing.
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Materials Today Chemistry
·
2026
·
IF 7.4
Xinyue Zhang,Qin Chen,Kai Chen,Haiyan Feng,Hongyu Zhang,Dekun Zhang,Shirong Ge
Hydrogels are ideal materials for biomimetic soft tissues due to their excellent biocompatibility and hydrophilicity. Inspired by the hierarchical structure of natural cartilage, we propose a biomimetic strategy of "hierarchically ordered architecture co gradient composition", creating a trilayer heterogeneous biomimetic cartilage hydrogel with synergistically enhanced load-bearing and lubrication functionalities, by using magnetic and temperature fields to induce ordered hydrogel networks and applying dispersion strengthening and nano-reinforcement. Specifically, the superficial layer with horizontally oriented graphene oxide (GO) nanosheets provides a shear-resistant network and low friction, the intermediate layer, featuring interwoven molecular chains and high-strength carbon fibers (CF), and the deep layer, with vertically oriented networks reinforced by hydroxyapatite (HA), collectively provide robust compressive strength of approximately 13.8 MPa at 50% strain. The friction coefficient of natural cartilage/trilayer heterogeneous biomimetic cartilage is only 0.023. The exceptional combination of high load-bearing and low friction arises mainly from interlayer heterogeneity and hydration lubrication. This work offers a novel approach for optimizing both mechanical and tribological properties of hydrogel materials.
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Journal of Energy Storage
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2026
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IF 10.7
Congya Zhu,Xiaoxian Su,Prabhu Sengodan,Liu Ming,Ehsan Ghasali,Yasin Orooji
High-entropy oxides (HEOs) are attractive electrode materials for next-generation supercapacitors owing to their entropy-driven structural stabilization and tunable compositional diversity; however, rare-earth (RE)-containing HEOs are still scarcely investigated. Herein, a single-phase cubic fluorite-type Er 0.4 Tm 0.4 Yb 0.4 Ho 0.4 Dy 0.4 O 3 high-entropy oxide is synthesized via a one-step solid-state reaction at 1500 °C for 5 h. The structural characterizations of prepared (RE)-based HEOs confirm the formation of a cubic fluorite-type structure. As a supercapacitor electrode in alkaline electrolyte, the material delivers a high specific capacitance of 318 F g −1 at 1 A g −1 with 85.7% capacitance retention after 8000 cycles, demonstrating typical pseudocapacitive behavior. Moreover, the assembled Er 0.4 Tm 0.4 Yb 0.4 Ho 0.4 Dy 0.4 O 3 //AC asymmetric supercapacitor achieves an operating voltage of 1.55 V and an energy density of 11.55 Wh kg −1 @ power density 775 W kg −1 with good rate capability. These results indicate that RE-based HEOs are promising pseudocapacitive electrodes for advanced energy storage.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Bei-Chen Gao,Yi-Xin Wang,Run-Ping Liu,Xiao-Fei Hou,Yang You,Wei-Ming Guo,Hua-Tay Lin
High-entropy carbonitride ceramics usually require high-temperature sintering to achieve high density and phase purity, but this process often causes grain coarsening and reduces mechanical properties. In this work, (Ti,V,Ta,Nb,W)(C,N) powder (0.37 ± 0.09 μm) was synthesized at 1400℃ by carbothermal reduction-nitridation, and W 2 C, WC, and (Ti,Ta)O x byproducts were formed in situ. After sintering at 2100℃, a single-phase ceramic with 98.7% relative density was obtained, but the grain size increased to 10.39 ± 2.25 μm. In contrast, after sintering at 1500℃, the ceramic showed 98.8% relative density and a fine grain size of 1.09 ± 0.25 μm because the retained solid byproducts are located at grain boundaries, triple junctions, and pore-rich intergranular regions, where they may assist pore elimination. Although the ceramic sintered at 1500℃ was not single-phase, its hardness (20.49 ± 0.39 GPa) was higher than that of the 2100℃ sample (19.60 ± 0.32 GPa), mainly because of grain refinement and compositional partitioning between the core and rim. In addition, fracture toughness increased from 2.13 ± 0.30 MPa·m 1/2 at 2100℃ to 3.48 ± 0.23 MPa·m 1/2 at 1500℃ due to crack deflection by multiphase grain boundaries and heterogeneous interfaces. These results indicate that low-temperature powder synthesis combined with low-temperature sintering can effectively improve the mechanical properties of high-entropy carbonitride ceramics by retaining a fine-grained microstructure and using in situ formed byproducts.
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