CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lin Han,Yueqin Li,Chen Chen,Lingke Liu,Zichun Lu
Conducting polymer-based conductive hydrogels can offer adjustable electronic characteristics and superior mechanical performance, thus holding significant promise for flexible supercapacitors. However, some of such hydrogel electrodes still suffer from inferior stability, unsatisfactory energy density, and narrow temperature tolerance, which limit their widespread use in flexible supercapacitors. Herein, polyaniline was coated on the surface of Ti 3 C 2 T x MXene flakes by in-situ chemical oxidative polymerization of aniline monomer pre-assembled on the MXene surface. The resulting MXene/PANI conductive nanofillers, Fe 3+ ions, and phytic acid were introduced into the gelatin/polyacrylamide hydrogel scaffold to form highly stretchable MPGP-Fe y hydrogel electrodes. Benefiting from the highly electrochemical activity of MXene/PANI conductive nanocomposite, efficient redox transition of Fe 3+ /Fe 2+ , and high open structure, the assembled all-gel symmetrical MPGP-Fe y supercapacitors can achieve a maximum specific capacitance of 847 mF/cm 2 , an impressive energy density of 71.8 μWh/cm 2 , and an exceptional cyclic stability, retaining 95 % capacitance retention after 5000 cycles. The phytic acid is advantageous in lowering the freezing points of both the hydrogel electrode and electrolyte layer. The developed supercapacitors demonstrate promising temperature-adaptive properties over a wide range of −30 ∼ 90 °C. When operated at −30 °C, an impressive stable output with long-term stability of 93 % retention are achieved. With the merits of good processability, high flexibility and stretchability, the present device can serve as an optimal energy source for powering diverse electronic components in practical applications.
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ACS Nano
·
2021
·
IF 15.881
Xinliang Li,Qing Li,Yue Hou,Qi Yang,Ze Chen,Zhaodong Huang,Guojin Liang,Yuwei Zhao,Longtao Ma,Mian Li,Qing Huang,Chunyi Zhi
The renaissance of aqueous Zn ion batteries has drawn intense attention to Zn metal anode issues, including dendrites growth, dead Zn, low efficiency, and other parasitic reactions. However, against the widely used 2D Zn foil, in fact, the Zn powder anode is a more practical choice for Zn-based batteries in industrial applications, but the related solutions are rarely investigated. Herein, we focus on the Zn powder anode and disclose its unknown failure mechanism different from Zn foils. By utilization of 2D flexible conductive Ti3C2Tx MXene flakes with hexagonal close-packed lattice as electrons and ions redistributor, a stable and highly reversible Zn powder anode without dendrite growth and low polarization is constructed. Low lattice mismatch (∼10%) enables a coherent heterogeneous interface between the (0002) plane of deposited Zn and (0002) plane of the Ti3C2Tx MXene. Thus, the Zn2+ ions are induced to undergo rapid uniform nucleation and sustained reversible stripping/plating with low energy barriers via the internally bridged shuttle channels. Paired with cyano group iron hexacyanoferrate (FeHCF) cathode, the FeHCF//MXene@Zn full battery delivers superior cycle durability and rate capability, whose service life with a CE of near 100% touches 850% of bare Zn powder counterparts. The proposed Ti3C2Tx MXene redistributor strategy concerning high-speed electrons/ions channel, low-barrier heterogeneous interface, is expected to be widely applied to other alkali metal anodes.
研究领域:
储能与转换
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材料科学
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电化学
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纳米材料
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电池技术
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JOURNAL OF POWER SOURCES
·
2026
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IF 7.9
Li Zeng,Huibin Guan,Sijiang Hu,Xiaochao Fan,Hanna He,Chuhong Zhang
As a typical two-dimensional transition metal sulfide, TiS 2 holds immense potential for lithium-ion batteries (LIBs) owing to its high theoretical capacity and large interlayer spacing. Nevertheless, intrinsic limitations, including poor intrinsic electronic conductivity and structural degradation hinder its development in high-energy-density and long-lasting LIBs. Herein, we prepared an in-situ derived TiS 2 /C composite electrode by harnessing few-layer Ti 3 C 2 MXene as a sacrificial template. Through controlled sequential S substitution within a S-rich environment, we achieved the uniform encapsulation of ultrathin TiS 2 nanosheets within a conductive amorphous carbon matrix. This unique architecture establishes robust and conductive networks that ensure excellent structural integrity while enabling rapid electron/ion transfer kinetics. In addition, the theoretical calculations of binding energy evolution unambiguously confirm the reaction pathways: Ti 3 C 2 MXene→intermediate TiO 2 /C→TiS 2 /C. As a result, the TiS 2 /C electrode delivers a high initial discharge capacity of 921.9 mAh g −1 at 100 mA g −1 , with a capacity retention rate of 72.7 % after 200 cycles. Remarkably, it sustains discharge capacity of 631.2 mAh g −1 after 1000 cycles at 500 mA g −1 , showcasing superior high-rate cyclability. This work paves the way for the development of energy-dense and long-cycling-life LIBs.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Jing Chen,Wenjing Liu,Rongfang Ma,Jingjing Nan,Shuai Wang
Kaempferol (KA) is an important natural flavonoid compound, and its sensitive detection is of great significance in food science and pharmacological analysis. To address the problems of traditional electrochemical sensors being susceptible to environmental interference and having poor stability in complex samples, this study successfully prepared a polydopamine-modified MXene/methylene blue composite material (PDA@MXene/MB), and constructed a novel ratio electrochemical sensor for the highly selective and sensitive detection of kaempferol. This sensor utilizes the high conductivity and large specific surface area of MXene as an ideal base, and through the in-situ polymerization of polydopamine, effectively prevents the stacking of MXene layers and simultaneously fixes methylene blue (MB) as a stable and reliable internal reference signal. During the detection process, the ratio of I KA /I MB is used for quantitative analysis, effectively eliminating the interference of background current fluctuations and environmental factors. Experimental results show that this sensor exhibits excellent analytical performance for kaempferol, presenting a good linear relationship within the concentration range of 0.4-36 µM, with a detection limit of 49 nM. Moreover, the sensor demonstrates good selectivity, reproducibility and stability, and it was also successfully used to determine kaempferol in actual tablet sample, yielding satisfactory recovery rates.
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ADVANCED MATERIALS
·
2026
·
IF 26.8
Tianyang Cui,Yapeng Zheng,Wei Cai,Liangyuan Qi,Jingwen Wang,Wei Yang,Weiguo Song,Yuan Hu,Jixin Zhu
Photothermal efficiency in MXenes arises from the complex interplay between electronic structure and lattice dynamics, yet the precise contribution of electron–phonon coupling (EPC) remains poorly understood. By integrating ab initio nonadiabatic carrier-dynamics simulations with state-resolved electron–phonon-coupling analysis, the intrinsic mechanisms governing photothermal conversion in MXene materials are elucidated. Results reveal that MXene photothermal performance is dictated by an intrinsic hierarchy of EPC channels and hot-phonon accumulation, whereas defect-mediated non-radiative recombination serves as a secondary channel and ultimately compromises long-term photothermal stability. Building on this mechanistic insight, a physics-inspired and AI-assisted molecular-screening framework is developed to identify surface passivation chemistries capable of extending hot carrier lifetimes and mitigating phonon bottlenecks. Guided by this paradigm, a composite film endowed with a concave-spherical light-trapping array was fabricated, leading to substantial improvements in photothermal conversion efficiency and operational stability. This quantum-to-device co-design paradigm transcends MXenes, providing a data-driven, systematic design pathway that integrates fundamental theory with surface passivation to accelerate the advancement of durable photothermal devices tailored for sustainable energy applications.
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PubMed
高影响因子
SENSORS
·
2026
·Vol. 26
·期 12
·3856
·
IF 4
Qichen Yang,Chun Yang,Mingzhu Liu,Nan Su,Jingran Sun,Jian Hou,Yixue Fu,Jin Wu,Yu Wang,Yuan Peng,Jialei Bai,Ying Liu,Zunquan Zhao
HighlightsWhat are the main findings?A dual-color fluorescence aptasensing system utilizing quantum dots and polydopamine-coated MXene was developed for simultaneous detection of spike and hemagglutinin proteins.Centrifugation-assisted signal separation, modular storage of aptamer lyophilized powder, and copper-free click chemistry-mediated self-assembly enabled sensitive multiplex detection.What are the implications of the main findings?The system offers a modular strategy that can be adapted to other respiratory pathogen targets by simply exchanging the aptamer lyophilized powder.Validation in artificial saliva suggests potential practicality for point-of-care application in clinical and public health settings.Antigen detection provides rapid and convenient diagnosis of respiratory infections. This study develops an innovative dual-fluorescence aptasensing method based on polydopamine-functionalized MXene (PDA-MXene) for the simultaneous detection of spike protein and hemagglutinin protein. The method employs green- and red-emitting quantum dot (QD) probes as fluorescence reporters, and the PDA-MXene as an effective adsorption and separation substrate. Coupled with a centrifugation-assisted separation strategy, this design method reduces background interference and enhances detection reliability. The method demonstrates good analytical performance, with detection limits of 0.82 ng/mL for spike protein and 2.11 ng/mL for hemagglutinin protein in single-channel mode. The dual-channel mode enables reliable and simultaneous quantification of both target proteins with minimal spectral cross-talk. Furthermore, this method exhibits high specificity against interferents including ions, proteins, and toxins. Artificial saliva, chosen as real sample, is spiked with target proteins to investigate the practical applicability of the method, showing recovery rates for both target proteins between 100 and 114 sensing strategy is simple to operate and allows the detection of new targets by simply replacing the azide-modified aptamer lyophilized powder. It therefore holds promising application for the simultaneous detection of multiple proteins in point-of-care testing and health monitoring fields.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Luyao Guo,Caixia Sun,Cong Liu,Qingchao Fan,Menghan Xue,Xinhua Xu
Living organisms in nature can sensitively perceive environmental stimuli and respond through rapid adaptive deformation. Inspired by this functionality, self-sensing hydrogel actuators have been developed, offering broad potential in areas such as information encryption, flexible wearables, and human–machine interfaces. Here, we report a versatile strategy for fabricating self-sensing hydrogel actuators with simultaneously high electrical conductivity and excellent mechanical durability. A robust interpenetrating network is constructed between surface-functionalized MXene nanomonomers (T-MXene) and modified cellulose nanocrystals (CNC-Vi), which markedly enhances the stability of poly(N-isopropylacrylamide) (PNIPAm) hydrogel. In addition, incorporation of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) further enhances the composite’s electrical conductivity while simultaneously improving the environmental adaptability. The resulting hydrogel exhibits high conductivity (14.92 S m–1), remarkable strain sensitivity (GF of 2.17 to 7.23), and outstanding durability. Leveraging these features, we realize reliable information encryption and storage, as well as wearable motion sensors capable of sensitive and precise motion detection. Moreover, the hydrogel system serves as an excellent platform for constructing high-performance self-sensing actuators. By inducing a gradient alignment of T-MXene/CNC-Vi under a direct-current (DC) electric field, we develop a shape-programmable hydrogel actuator that combines rapid responsiveness, remote light-driven actuation, and intrinsic self-sensing capability. This study not only provides a paradigm for designing advanced tactile and self-sensing materials but also establishes a foundation for achieving closed-loop, remotely controlled soft actuators for next-generation intelligent mechanical systems.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Tibebu Shiferaw Kassa,Abdurohman Mengesha Yessuf,Ayenew Meniber Mihiretu,Teshale Ayano Begeno,Tekeste Dankela Kule,Tassew Belete Bahru,Mohamedazeem M. Mohideen,Yong Liu
The emergence of 5G/6G wireless communication, aerospace, and sophisticated electronics devices has rendered electromagnetic interference (EMI) a serious challenge to device reliability and signal integrity. This intensifying issue demands a lightweight, flexible, and absorption-dominated shielding material. In this study, we employed coaxial electrospinning to fabricate MXene/graphene oxide/polyacrylonitrile core–shell nanofibers. This fabricated core–shell design features a conductive MXene-rich core encapsulated in a graphene oxide/polyacrylonitrile shell, which enhances tensile strength, electrical conduction, dipole polarization, impedance matching, interfacial polarization, and internal reflections, thereby improving electromagnetic wave attenuation. The optimized core–shell nanofiber with a graphene oxide-to-MXene mass ratio of 1:2 exhibited a shielding effectiveness of 68.86 dB (99.99995% electromagnetic wave attenuation), an electrical conductivity of 150.0 S·cm–1, and a specific shielding effectiveness of 14,085 dB·cm2·g–1. In addition to blocking electromagnetic interference, the MXene/graphene oxide@polyacrylonitrile core–shell nanofibers exhibit improved ability to facilitate efficient heat dissipation and prevent localized overheating. This multifunctional core–shell nanofiber design offers a flexible, scalable route to developing next-generation materials for EMI shielding, infrared stealth, and thermal management, with potential applications in the electronics, aerospace, and automotive industries.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yingying Li,Guangyao Zhang,Deqi Fan,Zongze Li,Yi Lu
Achieving efficient and selective solar-driven CO2 reduction remains a grand challenge due to sluggish proton–electron transfer kinetics and limited reactant availability at catalytic interfaces. Herein, we present a hierarchically structured aerogel integrating triazine-based covalent organic frameworks (TCOF) with Nb2CTx MXene nanosheets embedded in a poly(vinyl alcohol)/sodium alginate (PVA/SA) matrix. The aerogel leverages broadband light harvesting, hierarchical water regulation, and localized photothermal activation to enhance multielectron CO2 conversion. The hydrophilic–hydrophobic PVA/SA scaffold promotes rapid water uptake and vapor-phase transport, while Nb2CTx enables efficient near-infrared-induced heating to establish a proton-rich interfacial microenvironment. Simultaneously, the porous TCOF network offers abundant CO2 adsorption and activation sites. This synergistic architecture facilitates stable proton-coupled electron transfer (PCET) pathways and C–C coupling. In situ spectroscopic analyses reveal enhanced formation and stabilization of *COOH, *CH3, and *OCCHO intermediates under photothermal conditions, evidencing facilitated C–C coupling for C2 product generation. Under 3-sun irradiation for 3 h, the optimized TCOF/Nb2CTx aerogel delivers exceptional yields of 119.3 μmol·g–1 CH4 and 94.9 μmol·g–1 C2H4, which is 2-fold higher than powder analogues and surpassing previous COF/MXene systems. This work demonstrates a generalizable strategy to engineer carbohydrate polymer-based aerogels with integrated light-to-heat conversion, vapor regulation, and catalytic site accessibility for efficient solar-to-chemical fuel generation.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·Vol. 47
·期 20
·28642-28649
·
IF 4.527
Teng Yin,Yan Li,Renheng Wang,Omar A. Al-Hartomy,Ahmed Al-Ghamdi,Swelm Wageh,Xiaoling Luo,Xian Tang,Han Zhang
Ti 3 C 2 T x MXene has attracted remarkable attention due to its promising applications in energy storage and sensors. However, traditional MXene preparation methods used HF as etchant, which was highly toxic and harmful to human and environment. Moreover, the aqueous etchants will also result in the combination of OH, O and F groups on the surfaces, making it difficult to control the varieties and contents of the surface terminations. In this paper, a green and mild electrochemical exfoliation method was proposed to synthesize Ti 3 C 2 F x and synchronously control its fluorination degree on the surface. A non-aqueous ionic liquid , [BMIM][PF 6 ]-based solution was used as electrolyte. The as-prepared Ti 3 C 2 F x was fluorinated with the CF and TiF 3 groups, which were electrochemically active and contributed to the excellent cycling stability of the MXene anode-based Li-ion batteries. These findings provided a facile strategy to prepare MXene materials and dope MXene with tailored property for MXene-based energy devices applications.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
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CARBON
·
2022
·
IF 11.307
Yujie Ning,Donghui Jian,Siqi Liu,Fanwei Chen,Yihan Song,Siyi Li,Bin Liu
Two-dimensional titanium carbide (Ti 3 C 2 T x ) MXene has many distinctive advantages, including high conductivity, energy-storing, catalysis, etc. In particular, its accordion-like lamellar structure could provide excellent barrier properties to corrosive agents, which exhibit potential application value for anti-corrosion coatings. However, the problem that MXenes are susceptible to oxidative degradation in an aggressive environment limits its further application in the field of corrosion prevention. Herein, in our work for the first time, an effective method was developed for protecting sensitive Ti 3 C 2 T x MXene against oxidation by imidazolium salt modification (I-Ti 3 C 2 T x ), which considerably increased MXene antioxidant stability. The crystalline structure of I-Ti 3 C 2 T x remained unaltered in an aqueous solution for 30 days and kept the lamellar structure for a long period. Simultaneously, 1.0 wt% I-Ti 3 C 2 T x /EP could provide excellent anti-corrosion protection. A new synergistic mechanism for improving antioxidant stability and anti-corrosion property of I-Ti 3 C 2 T x /EP coatings was developed and clarified based on the free radical scavenging ability of imidazolium ions and the chemical characteristics of MXene.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2026
·
IF 8.2
Wenhao Duan,Pengcheng Deng,Genrui Xu,Zhenming Chen,Peng Li,Canhui Lu,Zehang Zhou
Smart materials with multi-responsive soft actuators with desirable electromagnetic interference (EMI) shielding performance are greatly required for next-generation electronics. Herein, a mesoscale assembly strategy via layer-by-layer vacuum-assisted filtration is proposed to fabricate MXene/Fe 3 O 4 /CNF (MC) composite films with precise asymmetric concentration gradients. Driven by the significant hygroscopic swelling mismatch and superparamagnetism, the MC film exhibits high sensitivity and excellent actuation performance under humidity and external magnetic field stimuli. Programmable 2D-to-3D biomimetic “flower buds” and non-contact precise magnetic navigation are successfully achieved. Furthermore, leveraging the highly conductive surface of MXene, a smart switch is developed to convert environmental humidity fluctuations directly into logical electrical (ON/OFF) signals. The introduction of Fe 3 O 4 nanoparticles and the physical gradient structure effectively optimize the hysteresis loss of electromagnetic waves and the bottom-layer back-reflection-triggered multilevel energy dissipation, achieving an impressive EMI SE of 43.4 dB, governed by a reflection-dominated mechanism uniquely enhanced by internal absorption. Combined with rapid, wide-temperature-range photothermal conversion, this work provides a novel design paradigm for intelligent soft robotics and flexible passive electronics in complex environments.
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