MEASUREMENT
·
2026
·
IF 6.1
Jiacheng Fan,Yueying Chang,Yibo Di,Qixun Xia,Libo Wang,Jia Yang,Aiguo Zhou
MXene-fabric TENG shows linear response to twist, fold, stretch for sensing. • TENG detect pressure down to 0.27 Pa for blinking, facial, swallowing monitoring. • TENG is integrated for real-time wrist monitoring and joint injury prevention. Herein, a Triboelectric Nanogenerator (TENG) was constructed as flexible self-powered sensors with excellent performance for smart sensing. Ti 3 C 2 MXene paste is directly coated on the surface of cotton fabric as conductive layers of the TENG. The conductive layer is encapsulated by silicone rubber films, which also work as triboelectric layers of the TENG. The sensor shows an excellent linear response to stretching, twisting and folding deformation, demonstrating its capability for quantitative deformation measurement without external power supply. More importantly, the sensor possesses ultra-low-pressure detection capability (as low as 0.27 Pa), and thus can accurately recognize physiological activities such as blinking, facial micro-expressions, and swallowing with high sensitivity. Furthermore, it was integrated into a human–computer interaction system as a complete measurement and instrumentation platform, to monitor wrist movement during dumbbell training in real-time and provide feedback on the correctness of the movement to reduce the risk of joint injury. This study provides a low-cost, simple, and highly sensitive solution for smart wearable devices with well-defined input–output relationship and stable dynamic response, offering important applications in sports health monitoring, joint protection, and flexible self-powered measurement systems. In this paper, a flexible self-powered sensor based on a Triboelectric Nanogenerator (TENG) was designed by spin-coating MXene paste as conductive layers. The sensor exhibits excellent linear responses to twisting, folding, stretching, as well as an ultra-low pressure detection limit of 0.27 Pa. It accurately detects physiological activities such as blinking and swallowing and is integrated into a human–computer interaction system to monitor wrist movements during dumbbell training for joint protection. This work presents a low-cost, sensitive wearable sensor with well-defined input–output relationship for self-powered measurement systems. Download: Download high-res image (114KB) Download: Download full-size image
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高影响因子
Journal of Physical Chemistry C
·
2026
·
IF 3.4
Hao Peng,Yanan Zhang,Dong Li,Hongxing Chen,Fengxia Geng
Ti3C2Tx holds great promise as an electrode material for high-capacitance supercapacitors, owing to its large specific surface area, pseudocapacitive behavior, and excellent electrical conductivity. However, the commonly used MILD synthesis method based on HCl/LiF etching introduces electrochemically inert −F terminations, which hinder ion storage and make the surface prone to oxidation. In this work, we report a modified MILD etching protocol using a significantly reduced LiF concentration under hydrothermal conditions at elevated temperatures. The lower LiF concentration and the higher etching temperature promote the formation of −O and minimize −F surface terminations. The resulting Ti3C2 film exhibits far fewer −F terminations than conventional films (Ti3C2–O1.37(OH)0.35F0.36·0.35H2O vs Ti3C2–O0.96(OH)0.39F0.75·0.47H2O). The oxygen-rich Ti3C2 film allows for enhanced proton-coupled electron transfer and reversible redox reactions in H2SO4, thus delivering a gravimetric capacitance of 511 F g–1 at 1 A g–1, 1.61 times higher than its counterpart obtained by conventional MILD method. The film retains 93.6% capacitance at 20 A g–1 and shows no performance degradation over 10,000 cycles. When assembled in asymmetric configuration with activated carbon, the device achieves a maximum energy density of 25.0 Wh kg–1 at 375 W kg–1 and maintains 15.4 Wh kg–1 at a high power density of 15,000 W kg–1. Devices with gel electrolyte also show good performance under practical conditions, including in parallel and series configurations as well as under bending deformation. This study presents a scalable strategy to tailor MXene surface chemistry for high-energy, high-power energy storage applications.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Jiawang Zhou,Xuejiao Xu,Yangchenyi Wu,Wanliang Yang,Fuzhong Wu
Silicon is among the most promising anodes for high-energy lithium-ion batteries due to its ultrahigh theoretical capacity; however, its catastrophic volume fluctuations and interfacial instability remain the primary obstacles to practical application. Here, we report a covalently integrated MXene-infiltrated porous silicon (MPSi) architecture that simultaneously delivers mechanical resilience, electronic continuity, and interfacial stability. Distinct from conventional surface-coating designs, few-layer Ti3C2Tx MXene nanosheets are driven deep into micron-scale porous silicon via ethanol-assisted wetting and vacuum-impregnation, forming a three-dimensional conductive network throughout the entire particle interior. Subsequent mild annealing induces dehydration condensation between Si–OH and Ti–OH groups, creating robust Si–O–Ti bonds that chemically anchor MXene to the silicon framework. This confinement-induced interfacial chemistry effectively suppresses MXene delamination, regulates solid electrolyte interphase evolution, and ensures long-range charge transport even under repeated volumetric expansion. Benefiting from the synergistic contributions of hierarchical internal voids, embedded MXene pathways, and covalent interfacial adhesion, the MPSi anode achieves high reversible capacity (906.3 mAh g–1 after 300 cycles at 1 A g–1), excellent rate capability (543.3 mAh g–1 at 5 A g–1), and improved initial Coulombic efficiency. Furthermore, the practical viability of this architecture is validated in full cells paired with NCM811 cathodes, which exhibit stable cycling with 80.2% capacity retention after 200 cycles. Detailed kinetic analysis further reveals dominant pseudocapacitive behavior enabled by the MXene-reinforced porous network. This work establishes an infiltration-driven, covalently bonded MXene-Si architecture that addresses both mechanical and electrochemical degradation of silicon anodes, offering a scalable strategy toward next-generation high-energy lithium-ion batteries.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Dandan Li,Jiepeng Zhao,Sai Huang,Zijian Li,Zhuo Cai,Zhaomin Tong,Liantuan Xiao,Suotang Jia,Xuyuan Chen,Yifei Ma,Mei Wang
Conductive MXene-based fibers hold great promise in the field of flexible wearable electromagnetic interference (EMI) shielding, but their poor spinnability, disordered layer stacking, and weak interfacial interactions severely limit their performance. To overcome these challenges, we develop a synergistic material-structure strategy to fabricate coaxial chitosan@MXene/graphene oxide (GO) composite fibers with chitosan (CS) as the outer shell. The introduction of GO significantly improves the dispersibility and interfacial compatibility of MXene, thereby resolving its inherent poor spinnability. The outer CS layer not only serves as a mechanical support layer but also forms an antioxidant protective shell, effectively inhibiting the degradation of MXene in aqueous and oxygenated environments. Furthermore, we propose a facile post-processing immersion-drying strategy, the immersion process induces slip and rearrangement of MXene and GO layers. Subsequent drying and shrinkage processes further compact the layers, thereby “locking” a tightly ordered conductive structure to yield CS@Mx-G-1 fibers. In this strategy, the fiber conductivity increases from 6.56 × 10 3 S/m to 1.55 × 10 4 S/m, while the electromagnetic interference shielding effectiveness enhances from 30 dB to 45 dB. The fibers maintain stable conductivity and flexibility after two immersion cycles. This approach provides a novel strategy for constructing high-performance flexible EMI shielding fibers.
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ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Feng Ye,Xiaojun Pan,Bo Wei,Xiangxiong Feng,Yixuan Zhou,Miao Guo,Yuxuan Tao,Xin Xia,Chao Xu
A defect-driven self-reduction strategy is proposed to exploit intrinsic Ti vacancies in Ti 3- x C 2 T 2 MXene to induce spontaneous reduction and atomic stabilization of Pt without external reducing agents. • The resulting Pt/Ti 3- x C 2 T 2 HD catalyst exhibits excellent acidic HER performance. • Pt/Ti 3- x C 2 T 2 HD achieves ultra-low Pt loading (1.16 wt.%) with low overpotential (42 mV @ −10 mA cm –2 ) and stable operation for 100 h at −50 mA cm –2 . • Strong Pt-Ti interaction and vacancy-induced charge redistribution optimize ∆G H * and d -band center, boosting activity. Engineering metal-support interactions at the atomic scale is critical for maximizing noble-metal utilization in hydrogen evolution electrocatalysis. Here, we report a defect-driven self-reduction strategy that exploits intrinsic Ti vacancies in Ti 3- x C 2 T 2 MXene to induce spontaneous reduction and atomic stabilization of Pt without external reducing agents. The vacancy-rich MXene framework simultaneously serves as an electron reservoir and anchoring template, enabling atomic-scale Pt dispersion at an ultra-low loading of 1.16 wt.%. The optimized Pt/Ti 3- x C 2 T 2 HD catalyst demonstrates excellent HER activity and durability in 0.5 M H 2 SO 4 , requiring low overpotentials of 42 and 95 mV at -10 and -100 mA cm –2 , respectively, while delivering enhanced mass activity and turnover frequency 8.7 and 8.5 times higher than commercial Pt/C and maintaining stable operation at -50 mA cm –2 for 100 h. DFT calculations reveal that Pt substitution at Ti vacancies of MXene generates abundant Pt-Ti-Ti threefold hollow sites with near-thermoneutral hydrogen adsorption free energies (∆G H *≈ -0.02 eV), while Pt-Ti d-orbital hybridization and directed charge transfer synergistically optimize the electronic structure, balancing hydrogen adsorption-desorption kinetics. This work highlights defect engineering of MXenes for support mediated noble-metal reduction and provides a rational design strategy for atom-efficient HER electrocatalysts. Pt atoms are atomically anchored on Ti vacancies of MXene via a defect-driven self-reduction strategy, achieving an ultra-low loading of 1.16 wt.% with a low overpotential of 42 mV at -10 mA cm –2 and 100 h stability at -50 mA cm –2 , attributed to the intrinsic Ti vacancies serving as both anchoring sites and electron donors for spontaneous Pt reduction. Download: Download high-res image (323KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Jiangtao Cui,Wenzhe Han,Zhuoran Hou,Xiangfeng Feng,Gaosen Wang,Huayu Zhang
The layered hydroxides are endowed with a large specific surface area that enables a massive utilization in super capacitors. However, they have low conductivity which confines the electrochemical response in the layered hydroxide (LDH). The proposed research involved a one-pot synthesis procedure based on hydrothermal approach in order to get a composite material made of Ti 3 C 2 T x -MXene, Cobalt-Vanadium-Aluminum layered double hydroxide (CoVA1-LDH), and coated nickel foam. The combination of Ti 3 C 2 T x -MXene and CoVAl-LDH composite material exhibited a good value of electrochemical activity (1938.45 F g −1 ), which is 1 A g −1 in a three-electrode system. With the use of 5000 charge discharge cycles, and a high rate of current density of 10 A g −1 , it retained 79.8% of the initial capacitance. Further, the fabricated Ti 3 C 2 T x -MXene/CoVAl-LDH//AC apparatus achieved maximum energy density of 51.57 Wh kg −1 at the power density of 800.0 W kg −1 . Following 10, 000 cycles of the cycling at 10 A g −1 , it demonstrated the good capacitance retention rate of 89.1% which indicates good cycling stability. Rational structural design may be considered an effective approach to enhance the properties of materials, and this article gives new insights into the structural design of MXene/LDH composites.
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Journal of Energy Storage
·
2026
·
IF 10.7
Zhen Yao,Qi Fan,Xinyu Lu,Zhuangchun Jian,Mengchen Li,Xu Yao,Yining Zhang,Junwei Luo,Gang Li,Jigang Wang,Anyang Yu,Tianshuo Zhao,Qingyu Xu,Yueming Sun
Ti 3 C 2 T x MXene is promising for energy storage due to its 2D layered structure and large interlayer spacing. However, it suffers from limited capacity, severe sheet restacking, and detrimental surface F groups that exacerbate side reactions, leading to poor rate performance and cycling stability. Herein, we employ surface chemical engineering to replace surface F with -OH groups on Ti 3 C 2 T x MXene, effectively suppressing interfacial side reactions, lowering interfacial impedance, and enhancing Li + transport. Furthermore, the hydrolysis reaction and self-assembly anchor SnO 2 clusters (CLs) onto the Ti 3 C 2 MXene interface, inhibiting nanosheet restacking, maintaining Li + diffusion channels and active sites while contributing to capacity. With these synergistic effects, the prepared SnO 2 CLs/MXene heterostructure delivers a high reversible capacity of 914.5 mAh g −1 at 0.05 A g −1 , 476.3 mAh g −1 at 2 A g −1 , and retains 88.6% capacity after 500 cycles at 2 A g −1 , with negligible capacity decay observed at 100 mA g −1 over 500 cycles.
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Advanced Science
·
2026
·
IF 14.1
Hui Zhao,Shuai Li,Jiabei He,Tong Gao,Jingfeng Wang,Dongxiao Kan,Wangtu Huo,Lixin Chen
Lightweight and flexible porous MXene films have emerged as promising candidates for electromagnetic interference (EMI) shielding and infrared stealth. However, current foaming techniques remain a challenge in preserving the intrinsic properties of MXene while achieving eco-friendly foaming. Herein, supercritical CO 2 foaming technology is employed to realize the green foaming of dense MXene films without compromising the inherent structure of the MXene nanosheets. The phase transition of supercritical CO 2 induces bubble nucleation and growth, effectively unfolding the stacked MXene nanosheets into a porous architecture. This strategy is broadly adaptable and can also be extended to other two-dimensional (2D) films, such as graphene oxide. Benefiting from highly-conductive porous skeleton, the foamed porous MXene film exhibits an EMI shielding effectiveness of ∼73.2 dB, which is 21% higher than that of the pristine MXene films. Furthermore, its absolute shielding effectiveness attains 23160 dB·cm 2 /g, surpassing most previously reported MXene-based porous materials. Notably, the porous MXene films also demonstrate excellent infrared thermal camouflage performance across a broad temperature window. This work not only offers an insight for the foaming of 2D MXene materials but also highlights the considerable engineering prospects of porous MXene films in the field of safety protection.
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SURFACE & COATINGS TECHNOLOGY
·
2026
·
IF 6.9
Jing Xu,Fengxiang Zhou,Hangqing Xie,Tie Zhang,Jiadi Lian
Photothermal superhydrophobic coatings have been recognized as a promising strategy for preventing ice accretion on industrial infrastructures. However, their practical deployment is often limited by mechanical fragility and performance decay under harsh icing conditions. Herein, we report a robust anti-icing coating- denoted as MSP (MXene-F-SiO 2 -PEEK). In this system, MXene acts as a nanoscale photothermal furnace, enabling rapid surface heating under illumination, while F-SiO 2 constructs a hierarchical micro/nanostructure that impairs ice nucleation through exceptional water repellency. The synergistic interplay between the photothermal effect and superhydrophobicity results in a remarkable freezing delay—three times longer than that of bare stainless steel—and enables rapid deicing within 181 ± 4 s under 0.2 kW/m 2 illumination. Moreover, the intrinsic self-lubricating property of MXene and the robust adhesion provided by the PEEK matrix collectively endow the coating with outstanding mechanical durability, maintaining its performance after extensive abrasion. This MSP coating strategy offers a promising and scalable solution for combating ice accretion and providing lubrication in dynamic systems, such as mechanical joints, operating under demanding low-temperature and high-humidity conditions.
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ACS Sensors
·
2026
·
IF 10.9
Liu Jiahao,Tang Xueming,Zhang Lei,Tian Ruobing,Wang Xinli,Miao Bin,Sun Yuanna,Wang Junbo,Yang Hao,Zheng Wanxiang
Conductive hydrogels are promising for wearable electronics; however, freezing and dehydration of their water-rich networks often compromise mechanical compliance, electrical conductivity, and sensing reliability. Here, we report a deep-eutectic-solvent-enabled polyampholyte/MXene eutectogel constructed from a betaine/ethylene glycol deep eutectic solvent (DES), a dynamically crosslinked polyampholyte network formed from sodium p -styrenesulfonate (NaSS) and quaternized dimethylaminoethyl acrylate (DMAEA-Q), and MXene nanosheets. MXene establishes the principal conductive pathways, while DES-mediated molecular interactions alter the local electronic structure of representative polyampholyte-associated complexes. Density functional theory calculations show that replacing water with DES redistributes the frontier molecular orbitals and decreases the calculated HOMO–LUMO energy difference of the NaSS-DMAEA-Q complex from 4.60 to 4.34 eV, consistent with a more favorable local charge-transfer environment. Correspondingly, at the same MXene loading, the DES-based eutectogel reaches a conductivity of 1.51 S/m, more than twice that of the water-based hydrogel (0.71 S/m). The DES hydrogen-bonding network also suppresses crystallization and solvent evaporation, while reversible ionic-pair interactions provide high deformability and adhesion. This formulation exhibits a fracture strain of approximately 630%, an adhesion strength of 47.9 kPa, a crystallization peak at –74.3 ° C, and 94% mass retention after 30 days. The resulting sensor enables strain, pressure, temperature, and respiratory monitoring. Furthermore, integration with an STM32-based signal-acquisition system and a deep neural network enables four-class recognition of respiratory signals collected from the mouth, nose, abdomen, and chest, achieving an internal validation accuracy of 95.06%, while a threshold-based warning module provides real-time identification of apnea-like respiratory interruptions.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Huihui An,Junhong Lv,Yang Cheng,Xuanye Zhao,Xinfang Wang,Enguang Ma,Xibang Chen,Xing Zhang,Wenjie Meng,Jinwen Qin,Minhua Cao
The synergistic triple dipole constructs a dipole electric field in G(H + )-MXene. • G(H + )-MXene exhibits outstanding Li storage capacity and temperature adaptability. • The flexible G(H + )-MXene//AC pouch cell retains 87.1% capacity after 10,000 cycles. Lithium-ion capacitors (LICs) often suffer from kinetic mismatch between capacitive cathodes and battery-type anodes, limiting their wide-range temperature applicability. Herein, we propose an interfacial dipole engineering strategy to address this challenge by modifying Ti 3 C 2 T x MXene with protonated guanine (G(H + )) to yield G(H + )-MXene. Density functional theory (DFT) calculations reveal that the energy difference between the charge neutrality level (E CNL ) of G(H + ) and the Fermi level (E f ) of Ti 3 C 2 T x can drive directional interfacial charge redistribution. The resulting charge-transfer dipole between Ti 3 C 2 T x and G(H + ) couples with the intrinsic molecular dipole of G(H + ), the surface dipole of MXene, and the dipole induced by newly formed Ti N bonds. This synergy generates a robust interfacial dipole electric field that significantly accelerates Li + transport and lowers the associated energy barrier. Consequently, the assembled G(H + )-MXene//activated carbon LIC delivers high energy and power densities, exhibits impressive wide-temperature operability (from 40 to −40 °C), and maintains remarkable flexibility even when bent to 180°. This work provides a promising strategy for tailoring the interfacial structure of MXenes to overcome performance bottlenecks in wide-temperature energy storage systems. Download: Download high-res image (160KB) Download: Download full-size image
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ANALYTICAL CHEMISTRY
·
2026
·Vol. 98
·期 29
·21514-21524
·
IF 7.3
Xiao Jiaxin,Lu Guoci,Yuan Haoran,Wu Yangtao,Zhu Shumin,Bu Lingjun,Zhou Shiqing
The pervasive contamination of groundwater
by highly
toxic oxyanions
necessitates advanced sensing technologies capable of high-throughput
screening. To overcome the intrinsic single-analyte limitation of
conventional ion-selective electrodes (ISEs), we developed a biomimetic
sensor array inspired by the cross-reactive principles of biological
taste systems, which was constructed by self-assembling quaternary
ammonium salts (QACs) with tailored alkyl chain lengths (Cn) within
MXene interlayers (MXene/QAC-Cn). When integrated with a machine learning
model, the array successfully enabled the simultaneous identification
of four kinds of oxyanions (CrO 4 2– , SeO 4 2– , BrO 3 – ,
and ClO 4 – ) with a discrimination accuracy
of 97.1%. The sensor demonstrated exceptional sensitivity, achieving
a detection limit of 1.2 × 10 –9 M, and a 32-fold
enhancement in analytical throughput compared to single-analyte approaches.
Theoretical calculations revealed that the confined microenvironment
of the MXene/QAC-Cn composite promotes partial dehydration of the
oxyanions, reducing the adsorption energy by 1.09 eV. This mechanism
is pivotal for generating high-quality and differentiable response
fingerprints, which in turn ensures the high accuracy of the machine
learning model. The programmable design of this platform underscores
its potential for extension to a broader spectrum of oxyanions, offering
a versatile and scalable solution for comprehensive water quality
monitoring.
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