Nano-Micro Letters
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2026
·Vol. 18
·期 1
·449
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IF 38.5
Ren Ziqi,Zhang Long,Zhang Qixiang,Yin Jianyu,Deng Mingfang,Zhou Xubin,Yao Qianqian,Li Songzhan,Gao Yihua,Zhang Zhen,Liu Nishuang
The solid-state architecture of iontronics osmotic power source (IOPS) significantly enhances volumetric power density and eliminates risks associated with leakage and drying up.
By making deep use of the ion-electron coupling properties of MXene, the highly integrated electrode design enables the IOPS device to be assembled into a compact osmotic power source using only three building blocks.
IOPS arrays can efficiently power commercial electronic devices and show great potential in portable, responsive power systems.
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IEEE SENSORS JOURNAL
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2026
·
IF 4.5
Yuanyuan Zhou,Song Li,Qingyang Xiao
The reliable detection of ammonia (NH3) at room temperature (RT) remains a critical challenge for applications in industrial safety and agricultural Internet of Things (IoT), where sensors must combine high sensitivity with robust stability against environmental interference. To address this, we engineered a stable chemiresistive heterojunction by integrating zinc phthalocyanine (ZnPc) nanoparticles with highly conductive two-dimensional (2D) Ti3C2Tx MXene nanosheets. Comprehensive characterization, including scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), confirms the successful formation of an intimate interface, which facilitates effective charge transfer. The optimized sensor demonstrates a response of ~25% to 100 parts per million (ppm) NH3 at 25°C, a fivefold enhancement over pristine MXene, along with excellent selectivity against common volatile organic compounds (VOCs). Crucially, the device exhibits outstanding repeatability and maintains stable performance across a wide relative humidity (RH) range (20-80% RH), directly addressing key practical deployment hurdles. The enhanced performance is attributed to the synergistic combination of specific NH3 adsorption at ZnPc molecular sites and efficient charge modulation through the conductive MXene network. This work provides a viable and manufacturable strategy for fabricating selective, stable, and room-temperature-operating gas sensors ready for integration into real-world monitoring systems.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Bin Deng,Xiaoping Zhou
The concurrent enhancement of mechanical robustness and electrical conductivity in flexible conductors is fundamentally restricted by conventional solution processing, as residual porosity and disordered architectures severely disrupt stress and charge transport. Here, we report an integrated vacuum filtration and thermomechanical pressing strategy that accurately regulates LM content and triggers structural densification in nacre-inspired MXene/bacterial cellulose architectures. Specifically, vacuum filtration rapidly consolidates the hybrid network to preserve the spatial homogeneity of the constituent blocks, while subsequent thermomechanical compression rheologically activates the LM as a structural lubricant to minimize frictional barriers, driving the lateral reorientation of MXene flakes into a densified, aligned architecture. The compression forces fluidic LM into structural voids, healing assembly defects and physically isolating the LM to suppress oxidation. Consequently, this synergistic reorganization yields composite films with an exceptional combination of tensile strength (563 MPa), electrical conductivity (1.8 × 105 S·m–1), specific electromagnetic shielding (>2.5 × 104 dB·cm2·g–1), and stable low-voltage Joule heating. This precise and scalable methodology offers a generalizable paradigm to resolve the mechanical-electrical conflict in multifunctional flexible electronics.
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ACS Sensors
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2026
·Vol. 11
·期 7
·5928-5941
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IF 10.9
Zhao Jiaqi,Pan Xiaosen,Li Nanpei,Wang Yutian,Sun Yuyang,Wang Xiaojuan,Liu Ruiming,Gao Meng,Liu Boyue,Ma Ning,Fang Yunsheng,Li Jie
Positive airway pressure therapy serves as a core therapeutic strategy for sleep-disordered breathing, with its efficacy generally evaluated via sleep breathing assessment. Nevertheless, the prevailing flow and pressure-based methods remain insufficient in both accuracy and interference resistance. Here, we propose an intelligent ventilation mask system based on the impedance humidity-sensing mechanism for long-term continuous and accurate respiratory pattern monitoring and evaluation. The integrated sensor is based on Ti 3 C 2 T x MXenes modified with dopamine-functionalized polyethyleneimine, which forms a wrinkled surface that increases the active area for water adsorption and provides a passivation effect to inhibit oxidation-induced performance degradation in humid atmospheres. The fabricated sensor exhibits high sensitivity (average of 2.29 × 10 4 Ω/%RH) and low humidity hysteresis (<0.83%). Even after extreme temperatures (100 ° C/–20 ° C) and 90-day exposure, it can maintain consistent performance. Integrated with a machine learning algorithm, the system identifies 11 respiratory patterns (5 normal and 6 abnormal) with 99.74% accuracy under ventilatory airflow and analyzes 8-hour continuous nighttime sleep data via customized software. This lays the groundwork for improving the long-term management of sleep-disordered breathing in both clinical and home settings.
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RARE METALS
·
2026
·Vol. 45
·期 8
·e70481
·
IF 12.1
Long Jiang,Zhuang Wu,Qi Fan,Shengchao Wang,Wenjie Zhang,Lijing Yu,Dirong Gong,Yunlei Zhou,Kun Liang
en This link goes to a English section zh This link goes to a Chinese section Lithium–sulfur batteries have attracted extensive interest owing to their exceptionally high theoretical energy density and environmental benignity. However, their practical performance remains severely constrained by intrinsic challenges, including the polysulfide shuttle effect and large volume expansion during cycling, which markedly compromise energy efficiency and fall far short of the requirements for commercialization. To address these challenges, we modify a commercial separator (PP) with a dual-transition-metal Mo 2 Nb 2 C 3 MXene, whose surface terminations are precisely regulated via distinct etching strategies, thereby substantially enhancing the electrochemical performance of lithium–sulfur batteries. Compared with cells employing the pristine commercial separator, all PP@Mo 2 Nb 2 C 3 -based cells deliver superior rate performance at a high current density of 3C. Notably, the PP@Mo 2 Nb 2 C 3 -Cl cell retains a high discharge capacity of 589 mAh g −1 after 200 cycles, nearly doubling that of the cell with the commercial PP separator (307 mAh g −1 ). At all tested C-rates, the PP@Mo 2 Nb 2 C 3 -based cells delivered higher discharge capacities than those employing the commercial PP separator. Overall, modification of Celgard 2500 with the dual-transition-metal Mo 2 Nb 2 C 3 MXene effectively suppresses the polysulfide shuttle, enhances sulfur utilization, and substantially prolongs the cycle life of lithium–sulfur batteries. This work provides valuable insights into the rational design and application of MXenes as functional modifiers for advanced lithium–sulfur batteries. 摘要 en This link goes to a English section zh This link goes to a Chinese section 锂硫电池因其高理论能量密度和对环境友好受到广泛关注,但其在工作中产生多硫化物引起的穿梭效应、体积膨胀等问题严重影响电池的效率,远不足以达到商业化的要求。针对这些问题,本文研究了双过渡金属Mo 2 Nb 2 C 3 MXene对商用Celgard 2500进行改性,通过不同的刻蚀方法调控Mo 2 Nb 2 C 3 MXene端基,进而有效提升了锂硫电池的性能。与商用Celgard 2500隔膜相比,所有基于PP@Mo 2 Nb 2 C 3 的电池在3C倍率下均表现出更优异的倍率性能。值得注意的是,PP@Mo 2 Nb 2 C 3 -Cl电池在200次循环后仍保持589 mAh g −1 的高放电比容量,几乎是使用商用Celgard 2500隔膜电池(307 mAh g −1 )的两倍。在不同倍率下,PP@Mo 2 Nb 2 C 3 电池均表现出比使用商用Celgard 2500隔膜电池更高的放电比容量。总体而言,采用双过渡金属Mo 2 Nb 2 C 3 MXene对Celgard 2500隔膜进行改性,能够有效抑制多硫化物穿梭,提高硫利用率,并延长锂硫电池的循环寿命。这项工作为合理设计和应用MXene作为先进锂硫电池的功能改性材料提供了有价值的见解。
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Chen Jin,Zhenke Chen,Hang Che,Shuzhong Wang,Zhiheng Liu,Tao Chen,Li Wang,Yuyuan Zhao,Xinhua Wang,Haoyuan Zheng,Haizhen Liu,Mi Yan
Sodium alanate has a reversible hydrogen storage capacity of 5.6 wt% at relatively mild conditions, but it is limited in practical use because of low reaction rates and the phase separation of the reaction product. In this study, to enhance the hydrogen storage ability of sodium alanate, a one-step hydrogen pressure ball milling process was used to introduce the MXene-based carbonitride, Ti 3 CN, and its catalytic modification ability was compared to that of Ti 3 C 2 on sodium alanate. The onset and peak hydrogen desorption temperatures of NaAlH 4 decreased significantly from 176.9 /203.3 °C to 76.8/129.3 °C, and the activation energies for the two-step dehydrogenation process were reduced from 118/159 kJ/mol (pure NaAlH 4 ) to 42/72 kJ/mol. In an isothermal condition at 100 °C, the composite material desorbed 3.30 wt% hydrogen within one hour, and the capacity retention rate kept as high as 93.7% after ten cycles of hydrogen absorption and desorption. It can be obtained that Ti 3 CN maintained its layered structure during the process of ball milling, and there possessed multiple active sites, such as Ti 3 CN, Ti 0 and TiAl. Moreover, TiAl nanointermetallic phases were found to be in situ generated during the cycling process. TiAl displayed a reversible “hydrogen pump” property, acting as nucleation sites to promote the adsorption and desorption of hydrogen. At the same time, the MXene lattice promoted the dispersion of aluminum and the prevention of phase separation. The support stability provided by Ti 3 CN and the coupled catalytic ability of TiAl and Ti 0 phases significantly improved the hydrogen desorption rate and cycling performance of NaAlH 4 at low temperature. These results are valuable to the construction of an efficient solid hydrogen storage system.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19
Amr Osman,Youneng Xie,Chaochao Sun,Jian Lu
The advancement of wireless technology and miniaturized electronic devices demands customized, high-performance electromagnetic interference (EMI) shielding materials with stability under harsh conditions. Although MXene provides excellent electrical and EMI shielding properties, achieving robust stability in MXene aerogels remains challenging. Herein, an annealing-enabled 3D printing process is developed to fabricate hierarchical MXene/carbon aerogels that maintain excellent shielding stability under extreme conditions, including long-term storage, intensive sonication, cryogenic temperatures (−196°C), high temperatures (200°C), cryogenic cycling (from −196°C to 20°C), and rapid thermal shock (∆T = 396°C). The aerogel achieves a superior EMI shielding efficiency of up to 111.1 dB, surpassing recently reported materials, and maintains high performance of 100.14 dB across the 4–18 GHz frequency range. Furthermore, flexible and sensitive pressure sensors are fabricated, demonstrating potential for motion detection and smart interfaces. The presented approach positions MXene/carbon aerogels as potential candidates for stable device shielding and sensing applications.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Chenghong Zhang,Kang Qiu,Jusen Guo,Linchen Hu,Chao Sun,Yikang Qiang,Wei Ding,Wei Wang,Jialiang Luo,Guoxing Pan,Zhigao Sheng
Achieving precise orientation control of two-dimensional (2D) materials remains a significant challenge for tailoring their electromagnetic functionalities. Herein, we report, for the first time, the successful fabrication of in-plane oriented Ti 3 C 2 T x MXene/epoxy (EP) composites via a high-intensity horizontal-rotating magnetic field. By systematically varying the magnetic field intensity from 0 to 6 T, the orientation degree of Ti 3 C 2 T x nanosheets can be continuously and precisely tuned, reaching a remarkably high value of 0.74. This process establishes a direct and quantitative correlation between the magnetic field strength and the resulting structural alignment. The magnetically induced orientation leads to a dramatic enhancement in key electromagnetic parameters, including complex permittivity, electrical conductivity, attenuation constant, and impedance optimization, all of which exhibit quantifiable relationships with the applied field. Consequently, this controlled alignment translates into extraordinary functional performance. The optimally aligned composite demonstrates a remarkable 5-fold improvement in GHz microwave absorption and a significant 44.9% enhancement in THz shielding efficiency compared to its non-oriented counterpart. This work pioneers a magnetic-field strategy to manipulate 2D microstructure, establishing quantitative structure-property relationships and paving the way for next-generation electromagnetic absorption and shielding composites.
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JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Wenjuan Zhang,Qiaohong Zhang,Yuheng Li,Chunli Liu,Youliang Wang,Panpan Zhang,Hanhong Xu
The separation of salts and heavy metal ions from wastewater is crucial for environmental protection and resource recovery. Lamellar membranes assembled from 2D nanoflakes have emerged as promising candidates due to their high selectivity and permeability. Here, we reported the fabrication of Metal Ion Cage MXene membranes with enhanced anti-swelling properties using a dual-modification strategy involving K + intercalation and polyethyleneimine (PEI) functionalization. The resulting membranes exhibited excellent structural stability in aqueous solutions, along with outstanding separation performance. The membranes achieved a maximum CR rejection rate of 98.7%, with divalent ions such as Ca 2+ , Cu 2+ , and Pb 2+ being rejected at rates exceeding 80%, alongside a water flux of ∼38.22 L m −2 h −1 . Mechanistic analysis revealed that K + intercalation enhanced interlayer interactions and limited swelling, while PEI modification strengthened electrostatic repulsion and stabilized the membrane structure. This synergistic strategy provided new insights into the structural design of stable 2D membranes and broadens their applicability in sustainable water treatment technologies.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2026
·
IF 3.1
Zhao Xiaole,Zhang Guanglei,Guo Yitong,Di Yibo,Wang Libo,Chang Yukai,Zhou Aiguo
This study develops high-performance zinc-ion battery cathodes through dual engineering of vanadium-alloyed MXene and its heterointerface with sodium vanadate (NaV 3 O 8 ·1.5H 2 O, NVO). By selectively etching (Ti 1-x V x ) 3 AlC 2 MAX precursors (NaF/HCl, 60℃, 48 h), we synthesized (Ti 1-x V x ) 3 C 2 MXene solid solutions where V-substitution optimizes electron conductivity. When composited with NVO, the 20 wt% (Ti 0.7 V 0.3 ) 3 C 2 /NVO cathode delivers remarkable specific capacities of 221.6 mA h g −1 at 10 A g −1 – surpassing pure NVO by 4.0-fold and Ti 3 C 2 /NVO by 2.5-fold – and maintains 195 mA h g −1 after 5,000 cycles (1.7 times of pure NVO and 4.1 times Ti 3 C 2 /NVO), outperforming state-of-the-art vanadate cathodes. Mechanistic analysis reveals that while NVO enables reversible Zn 2+ redox reaction, the V-alloyed MXene simultaneously constructs a 3D conductive network suppressing electrode degradation and creates low-energy Zn 2+ migration channels at interfaces via lattice distortion. Collectively, this interface engineering strategy unlocks ultra-stable zinc storage at practically high rates (10 A g −1 ), providing a pathway for next-generation zinc storage cathode.
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ACS Applied Electronic Materials
·
2026
·
IF 4.7
Junlin Wang,He Li,Tianyu Luo,Sisi Liu,Xiaoyan Wen,Haifei Lu,Ming-Yu Li
Abstract Colloidal quantum dot (CQD) infrared (IR) photodetectors exhibit great application potential in the fields of optical communication, environmental monitoring, imaging, and wearable sensing. Specifically, AgBiS2 CQD IR photodetectors have garnered extensive attention because of their excellent photoelectric properties, solution-processability, as well as non-toxicity and environmental friendliness. However, the high trap density and relatively low carrier mobility of AgBiS2 CQDs have limited their development in high-performance IR photodetectors. Herein, a representative 2D transition carbide, Ti3C2Tx, is introduced into the AgBiS2 CQD films to develop enhanced IR photodetectors based on MXene/AgBiS2 hybrid films. By finely controlling of the MXene additive concentration, this combination possibly helps reduce trap state density in AgBiS2 films to suppress carrier nonradiative recombination and simultaneously constructs an efficient conductive pathway in AgBiS2 films to enhance the extraction of photo-generated carriers. Consequently, compared to the pristine AgBiS2 CQD devices, the MXene/AgBiS2 CQD-based infrared photodetector exhibits significant promotion in the responsivity, EQE, and estimated normalized detectivity under a broad band from 500 to 900 nm, demonstrating an alternative method for tailoring the performance of AgBiS2 CQD optoelectronic devices.
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MATERIALS CHEMISTRY AND PHYSICS
·
2026
·
IF 5.2
Qiuyun Song,Yangmiao Shen,Fanglan Guan,Junhe Zhang,Yaxia Liu,Shanqi Lv
Contraction–sudden-expansion flow regulates GO/MXene nanosheet assembly. • RGO3# combines preferential alignment with locally less compact stacking. • RGO3# achieves 270 MPa strength and 346 S cm −1 conductivity. • 5 wt% MXene boosts conductivity to 548 S cm −1 and capacitance to 650 F cm −3 . • The device delivers 361.1 mWh cm −3 with 96.09% retention after 15,000 cycles. The rapid development of flexible wearable devices has stimulated growing interest in graphene-fiber-based flexible supercapacitors for wearable electronics. Nevertheless, conventional wet spinning provides limited control over nanosheet orientation and local stacking, and subsequent coagulation and reduction can induce compact face-to-face restacking, restricting ion accessibility while limiting the simultaneous optimization of mechanical, electrical, and electrochemical properties. As a result, fiber-shaped supercapacitors assembled from these fibers often exhibit unsatisfactory energy density and are unable to meet the performance requirements of smart textiles. In this work, three gradient contraction–expansion microfluidic spinning channels were designed based on microfluidic wet-spinning technology. Graphene composite fibers were fabricated from graphene oxide (GO) and GO/nanosized titanium carbide (MXene) composite spinning dopes, and finite-element simulations were carried out to evaluate the shear and extensional flow fields within the microchannels. The influence of microchannel geometry on fiber microstructure, mechanical properties, electrical conductivity, and electrochemical performance was systematically investigated. The contraction–expansion channel enabled the graphene nanosheets to retain an overall preferentially aligned framework while locally disrupting compact face-to-face stacking through flow-induced nanosheet rearrangement, thereby favoring the formation of intersheet voids and mesoporous ion-transport pathways. The resulting reduced graphene oxide (RGO) fiber exhibited a WAXS-derived orientation degree of 0.64, a tensile strength of 270 MPa, and an electrical conductivity of 346 S cm −1 . This globally ordered yet locally porous architecture provides continuous pathways for electron transport while improving electrolyte accessibility and ion transport within the fiber. After incorporating only 5 wt% MXene, the electrical conductivity of the MXene/RGO composite fiber further increased to 548 S cm −1 . The symmetric supercapacitor assembled from this composite fiber delivered a volumetric capacitance of 650 F cm −3 at a current density of 0.1 A cm −3 , together with an energy density of 361.1 mWh cm −3 and a power density of 100 mW cm −3 . This study demonstrates a microfluidic structural-regulation strategy for constructing graphene-based energy-storage fibers with coexisting preferential nanosheet alignment and locally porous ion-transport domains, providing useful guidance for flexible wearable energy-storage devices.
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