ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Jingbin Wei,Hongshuo Cao,Yanhong Tian,Xuejun Zhang
To address the inherently poor electronic and ionic conductivity of titanium-niobium oxide materials and to improve their suitability for use at high current densities , we designed and synthesized Ti 2 Nb 10 O 29 (TNO) microspheres with diameters of 1 to 3 μm by a simple solvothermal method . Then, MXene, a highly conductive two-dimensional material, was introduced and perfectly coated onto the microsphere surface by electrostatic forces and chemical bonding. The MXene nanosheets not only improve the overall conductivity but also protect the TNO microspheres and reduce the electrochemical polarization at high current densities. Thus, the composite anode electrode shows outstanding reversible specific capacity and stability at high currents and long cycles. Specifically, at 20 C, the initial reversible specific capacity of the TNO@MXene electrode was 200.3 mAh.g −1 with a coulomb efficiency of 94.4%. The reversible specific capacity remained at 131.2 mAh.g −1 even after 1400 cycles with an average capacity loss rate of only 0.02%. In addition, the outstanding pseudo-capacitance property of TNO@MXene ensures its fast charging and discharging capability and capacity at a high rate.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Dong Wen,Guobing Ying,Lu Liu,Yuexia Li,Cheng Sun,Cong Hu,Yinlong Zhao,Ziying Ji,Jianfeng Zhang,Xiang Wang
In this paper, flexible MXene/graphene composite electrodes were successfully fabricated by inkjet printing process using printable graphene-modified MXene-based ink. The results show that the interlayer spacing in the printed MXene-based composite films is increased through the insertion of graphene nanosheets , which effectively reduces the self-stacking effect of MXene. The printed MXene/1 wt% graphene composite electrodes exhibit excellent stability with 89% resistance retention at a 180° bending angle, high volumetric capacitance of 183.5 F cm −3 at a scanning speed of 5 mV s −1 , and long cycle life with 75% capacitance retention after 3000 charge-discharge cycles. Moreover, a flexible supercapacitor based on those electrodes demonstrates a competitive energy density of 0.53 μWh cm −2 at a power density of 10 μW cm −2 , which provides prospects for the design of next generation flexible and wearable energy storage devices.
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DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 14
·2102553
·
IF 6.389
Wenjing Fan,Cheng Li,Wei Li,Jin Yang
MXene-based textile electronics are great promising wearable devices due to their potential applications in human healthcare and artificial intelligence but are generally hindered by the long response time and absence of physiological signal details. Herein, a novel MXene-based textile pressure sensor fabricated by assembled MXene onto the scuba knit with a hollow structure is constructed. Benefiting from the high electrical conductivity, specific capacitance, and outstanding mechanical properties of MXene, the as-designed textile sensor exhibits multiple splendid sensing properties, such as high sensitivity (GF = 23.7 kPa −1 ), fast response time (71.5 ms), great stability (over 20 000 cycles), and excellent waterproof capability (up to 6 h immersion in water). Based on these splendid properties, this sensor can not only perceive pulse signals with feature points and respiration signals with relatively low frequency but also identify joint activity and different words when attached to the subject's knee and throat. Furthermore, a personalized intelligent health monitoring system integrated with the MXene-based textile sensor is developed to collect the physiological signals from different people and the support vector machine algorithm applied to identify and distinguish them, proposing a great advance in wearable health monitoring.
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DOI
高影响因子
Progress in Natural Science-Materials International
·
2020
·
IF 4
Guangzhen Cui,Linbo Wang,Ling Li,Wei Xie,Guangxin Gu
MXene, a novel two-dimensional (2D) multi-layer material, has drawn unusual interest as the microwave absorbers for electromagnetic energy attenuation. Synthetic MXene-based heterostructure composites via optimizing structure is an effective strategy to endow MXene materials with high-performance microwave absorption. This study reports the fabrication and investigation of the microwave absorption performance of a sandwich-like CuS/Ti 3 C 2 T x MXene composites prepared by loading CuS nanoparticles onto 2D Ti 3 C 2 T x via a solvothermal method. The morphology and electromagnetic absorption properties of this composite were investigated and the results demonstrated that the CuS/Ti 3 C 2 T x composite with a heterolayered architecture displayed superior microwave absorption ability. With a 35 wt% filler loading in the paraffin matrix, the minimum reflection loss value reached −45.3 dB at a frequency of 7.3 GHz and the effective absorption bandwidth achieved a value as high as 5.2 GHz with a thickness of 2.0 mm. The enhanced microwave absorption performances can be ascribed to the cooperation of the conductive network, interface polarization, dipole polarization, multiple reflection and scattering. Therefore, the synthesized CuS/Ti 3 C 2 T x MXene composites offer an efficient foundation for the design and utilization of other lightweight microwave absorbers.
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高影响因子
Sensors & Diagnostics
·
2022
·Vol. 1
·期 5
·1080-1087
·
IF 0
Feng Wang,Hongye Wang,Xiaoqiang Cui,Yang Liu
Innovating the fluorescence characteristic of MXene nanosheets and quantum dots could result in fascinating perspectives in the applications of sensing, imaging and photocatalysis. However, the currently reported MXene-based materials have only shown down-conversion fluorescence emission, while the exploration and research of up-conversion fluorescent performance are scarce. Herein, the upconversion emission behaviors of Ti3C2 MXene nanosheets are reported and investigated for the first time. It was observed that the Ti3C2 nanosheets present upconversion emission in a wide wavelength range with adjustable color, covering almost the entire visible spectrum. The unique features of larger anti-stokes displacement (over 200 nm), narrower full width at half maximum (∼17 nm) and longer lifetime (1.18 μs) were also exhibited, which are superior to those of the down-conversion fluorescence. The self-quenched fluorescence of the Ti3C2 nanosheets on the side of the highest fluorescence emission was also displayed. Based on the quenching effect of L-tryptophan on the Ti3C2 fluorescence by a fast charge transfer mechanism, a fast, simple and label-free fluorescence sensor for L-tryptophan detection was realized with a detection limit as low as 91 nM, which provides a valuable tool to widen their applications in food safety and diagnostics.
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DOI
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Baochun Meng,Guozhen Liu,Yangyang Mao,Feng Liang,Gongping Liu,Wanqin Jin
Two-dimensional (2D) materials have been demonstrated as promising building blocks of designing high-performance membranes for molecular separation. Nevertheless, it is a big challenge to apply 2D-material membranes for water desalination . Herein, we proposed a new type of surface-charged MXene (SC-MXene) membrane for water desalination, which was facilely fabricated by laminar stacking of MXene nanosheets and subsequent surface-coating with polyelectrolyte layer. The morphology, physicochemical structure and surface property of the MXene materials and resulted membranes were observed by XPS , SEM, water contact angle test , AFM , IR and XPS . These results demonstrated that coating polyelectrolyte (PEI) successfully tuned the surface charge and enhanced the hydrophilicity without scarifying the laminar structure of MXene membrane. By utilizing the effects of electrostatic interaction and size-sieving, the resulting surface-charged MXene (SC-MXene) membrane exhibited high salt rejection and water permeance during either nanofiltration or forward osmosis process, showing great potential for water desalination.
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DOI
高影响因子
Nanoscale Research Letters
·
2021
·Vol. 16
·期 1
·1-10
·
IF 4.703
Feng Yanmin,He Meng,Liu Xia,Wang Wei,Yu Aifang,Wan Lingyu,Zhai Junyi
The output power of the triboelectric nanogenerator (TENG) strongly depends on the performance of triboelectric materials, especially microstructures and functional groups of them. In this work, aiming at the excellent triboelectric ability, alternate-layered MXene composite films-based TENG with abundant fluorine groups(-F) through layer-by-layer stacking are designed and fabricated. Benefitting from the uniform intrinsic microstructure and increased dielectric constant, when the amount of the Nb 2 CT x nanosheets increases to 15 wt%, the TENG based on Nb 2 CT x /Ti 3 C 2 T x composite nanosheets films achieves the maximum output. The short-circuit current density of 8.06 μA/cm 2 and voltage of 34.63 V are 8.4 times and 3.5 times over that of pure Ti 3 C 2 T x films, and 3.3 times and 4.3 times over that of commercial poly(tetrafluoroethylene) (PTFE) films, respectively. Furthermore, the fabricated TENG could be attached to human body to harvest energy from human motions, such as typing, texting, and hand clapping. The results demonstrate that the alternate-layered MXene composite nanosheet films through layer-by-layer stacking possess remarkably triboelectric performance, which broaden the choice of negative triboelectric materials and supply a new choice for high output TENG.
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高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Long Jiao,Fuquan Ma,Xiaotong Wang,Zhimin Li,Zhongai Hu,Qing Yin
Asymmetric supercapacitors (ASCs) need positive and negative electrodes to produce a larger redox peak position difference to achieve a higher energy density. Here, 2,8-quinolinediol (QD) is adopted to modify reduced graphene oxide (rGO) and prepare an organic molecule electrode (OME), in which the Faraday reaction occurs in a more positive potential range. The electrochemical tests show that the optimized OME (QD/rGO-0.75) releases a high special capacitance (371 F g–1 at 5 mV s–1) and exhibits an excellent rate capability (86.8% of the initial value at a scanning rate multiple of nearly 20 times). Meanwhile, an MXene (Ti3C2Tx) with a relatively negative potential is prepared. QD/rGO-0.75 and Ti3C2Tx are, respectively, used as positive and negative electrodes to assemble an ASC. The measurements indicate that the assembled ASC is able to store charge within a wide voltage window of 1.6 V in the 1 M H2SO4 electrolyte and exhibit better energy storage performance. Furthermore, the device delivers an excellent cycling stability (83.5%, over 10,000 cycles). The two series-connected devices can light 37 red light-emitting diodes, indicating their potential application.
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高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Ling Zhang,Jiaying Bi,Zhikun Zhao,Yuxin Wang,Daobin Mu,Borong Wu
High energy density Lithium-Sulfur (Li-S) batteries have attracted significant attention, although their severe energy decay and rate capability loss still hinder their large-scale application. Two-dimensional (2D) MXene materials can immobilize polysulfides via strong chemisorption and physical hinderance. However, MXene nanosheets tend to restack in solution, losing their favorable electronic conductivity due to functional substituents on the surface. In this work, a three-dimensional (3D) MXene material is fabricated with MXene nanosheets and carbon-poly (diallyl dimethyl ammonium chloride) nanoparticles using self-assembly strategy. As the sulfur host, the 3D material not only prevents MXene nanosheets from restacking, but also ensures to provide a framework to confine S and raises the utilization of sulfur. As a result, the sulfur cathode demonstrates a highly reversible specific capacity of 1016.8 mAh g −1 at 0.2 C, excellent rate capability, and long-term cycling stability, with the capacity decay rate of only 0.075% per cycle over 600 cycles at 1 C.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wei Lu,Hongpo Liu,Shiquan Li,Jianhua Zhu,Yunfeng Chao,Zhuosen Wang,Yapeng Tian,Xinwei Cui
Sodium selenium (Na-Se) batteries are considered promising candidates for next-generation energy storage devices due to their high volumetric energy density. However, the Se cathode still faces the problems of the shuttling effect and sluggish selenium reduction kinetics. Improving the surface adsorption and catalytic process of selenium cathode can greatly solve the above issues and achieve excellent performance to enhance the application of Na-Se batteries. Herein, experimental and theoretical simulation results indicate that the boron and defects co-doped MXene (BD-MXene) could initiate the redistribution of electrons and improve the surface polarity, promoting chemical adsorption, thus effectively suppressing the shuttle effect. More importantly, the BD-MXene can promote the conversion between polyselenide, accelerating the electrochemical reaction kinetics of Sodium polyselenide. As a result, the obtained Se@BD-MXene exhibits a high rate performance of 502 mAh g −1 at 50 A g −1 (calculated based on Se@BD-MXene) and excellent cycling stability with a decay per cycle of 0.001 % over 4500 at 10 A g −1 . This work provides a viable strategy to design Se cathodes for Na-Se batteries with high-rate capability and long-term cycling.
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高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·
IF 3.7
Mengtian Lu,Tianye Zhang,Yue Yang,Xin Lin,Jin Huang,Yuan Sun,Tiedong Sun
Graphical The study innovatively combines etched/stripped monolayer Ti 3 C 2 MXene with Cu (2- x ) Se nanoparticles in a one-pot method. The synthesized Ti 3 C 2 /Cu (2- x ) Se nanocomposite has catalase (CAT) and peroxidase (POD) -like activities combined with the excellent photothermal properties of MXene, which enhances the catalytic performance of Cu (2- x ) Se under near infrared (NIR) irradiation, and realizes the synergic photothermal catalytic treatment. Traditional tumor treatments (surgery, radiotherapy, chemotherapy, etc.) have certain limitations and can have serious negative effects, such as difficulty in cutting out tumors, damage to normal tissues, and complications. Ordinary nanozymes have low catalytic activity and require higher doses for treatment, which can increase in vivo toxicity and side effects. To address these limitations, we developed a Ti 3 C 2 MXene-based nanocomposite (Ti 3 C 2 /Cu (2- x ) Se) integrating Cu (2- x ) Se nanozymes with dual enzyme-mimicking activities (catalase and peroxidase) and MXene's photothermal properties. The Cu (2- x ) Se component catalyzes the decomposition of tumor-overexpressed H 2 O 2 into O 2 and cytotoxic ·OH, alleviating hypoxia while inducing oxidative stress. Simultaneously, MXene's high surface area and photothermal capability enhance nanozyme stability, biocompatibility, and catalytic efficiency under near-infrared irradiation. Notably, the photothermal effect amplifies enzymatic activity, enabling synergistic nanocatalytic-photothermal therapy. This synergy not only degrades glutathione to suppress tumor antioxidant defenses but also achieves targeted tumor ablation with reduced dosage requirements. Our work highlights a rational design of MXene-based nanozymes for enhanced multimodal tumor therapy, offering a paradigm for nanocomposite-driven disease treatment.
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DOI
PubMed
高影响因子
Polymers
·
2024
·Vol. 16
·期 13
·1824
·
IF 4.7
Zirong Luo,Na Kong,Ken Aldren S. Usman,Jinlong Tao,Peter A. Lynch,Joselito M. Razal,Jizhen Zhang
Wearable electronic sensors have recently attracted tremendous attention in applications such as personal health monitoring, human movement detection, and sensory skins as they offer a promising alternative to counterparts made from traditional metallic conductors and bulky metallic conductors. However, the real-world use of most wearable sensors is often hindered by their limited stretchability and sensitivity, and ultimately, their difficulty to integrate into textiles. To overcome these limitations, wearable sensors can incorporate flexible conductive fibers as electrically active components. In this study, we adopt a scalable wet-spinning approach to directly produce flexible and conductive fibers from aqueous mixtures of Ti3C2TxMXene and natural rubber (NR). The electrical conductivity and stretchability of these fibers were tuned by varying their MXene loading, enabling knittability into textiles for wearable sensors. As individual filaments, these MXene/NR fibers exhibit suitable conductivity dependence on strain variations, making them ideal for motivating sensors. Meanwhile, textiles from knitted MXene/NR fibers demonstrate great stability as capacitive touch sensors. Collectively, we believe that these elastic and conductive MXene/NR-based fibers and textiles are promising candidates for wearable sensors and smart textiles.
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高影响因子
危险品化学品经营许可证（带存储）