Russian Journal of Physical Chemistry A
·
2025
·Vol. 99
·期 3
·620-628
·
IF 0.8
Lei Bai,Cheng Fangming,Dong Yuting
Antimony sulfide (Sb2S3) possesses a high theoretical capacity and excellent reversibility, making it a promising anode material for lithium-ion batteries (LIBs). However, its poor intrinsic conductivity and significant volume changes during charge/discharge cycles severely limit its cycling stability and rate performance. In this study, a novel composite material was synthesized by electrostatically assembling Sb2S3 nanowires (Sb2S3 nw) onto MXene nanosheets as a potential anode material (SbSMX). The introduction of highly conductive MXene substrates enhances electron transfer between the distinct interfaces of Sb2S3 and MXene. Additionally, the constructed 1D–2D structure promotes ion transport within the electrode, while the mechanical flexibility of MXene effectively mitigates the severe volume expansion of Sb2S3. As a result, the SbSMX composite exhibits a high capacity of 813 mA h g–1 at a current of 50 mA g–1, stable cycling performance with a capacity of 735 mA h g–1 after 100 cycles at 100 mA g–1 (88% retention), and excellent rate capability, achieving 466 mA h g–1 at a current of 3 A g–1.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Ying Yuan,Qiao You,Shunjian Qiu,Zhiming Wang,Yunhua Chen,Chaoyang Wang,Li Zhou,Hongxia Liu
Existing electromagnetic shielding materials often suffer from issues such as high reflectivity, limited adaptability, and a lack of self-healing capabilities when they are applied. This study investigates electromagnetic shielding materials (MNWPA or MNPPA) developed by integrating MXene (Ti3C2Tx), magnetic nickel nanowires (Ni NWs), or Ni nanoparticles (Ni NPs) into a dual network hydrogel of poly(vinyl alcohol) and poly(acrylic acid). This unique network structure imparts excellent self-healing capabilities to the materials through reversible dynamic covalent, ionic, and hydrogen bonds. This grants the hydrogel robust mechanical properties even after undergoing self-healing within 1 h of damage. The incorporation of MXene and Ni not only enhances conductivity but also achieves favorable impedance matching, resulting in effective electromagnetic interference (EMI) shielding properties for the hydrogel. Notably, the observed shielding mechanism is primarily based on absorption. Interestingly, the MNWPA and MNPPA hydrogels exhibit distinct absorption and reflection losses due to the differing morphologies between Ni NW and Ni NPs. Furthermore, after cut-healing treatment, the MNWPA hydrogels show a higher retention rate of EMI shielding effectiveness (EMI SE). Conversely, after undergoing multiple stretching behaviors, the MNPPA hydrogels demonstrate a higher retention rate of EMI SE. These findings further emphasize the impact of the Ni NW and Ni NP morphologies on the EM shielding performances of the hydrogels. Additionally, the MNWPA and MNPPA hydrogels display a sensitive deformation response and can serve as strain sensors to monitor various movements of the human body. Hence, our study offers a valuable reference for exploring composite EM shielding materials incorporating Ni NW or Ni NPs.
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CARBON
·
2024
·
IF 10.5
Liang Yin,Yiqian Wang,Ziqi Zhao,Yuyan Liu,Ningning Cao,Ting Shi,Xiaolong Zhang,Zhen Yu,Jingfeng Wang,Zhimin Fan
MXene (Ti 3 C 2 T x ) nanosheets produced through wet etching are typically obtained as low-concentration (<1 wt%) aqueous dispersions, leading to challenges like easy oxidation, high storage and transportation costs, and difficulties in direct processing. Here, we introduce a rapid and efficient technique to capture and semi-solidify single-layer MXene nanosheets using an erasable capture agent, transforming low-concentration MXene dispersions into high-solid-content (>85 wt%) semi-solids within minutes. This approach preserves the intrinsic properties of the MXene, imparts long-term stability, and enables reversible redispersibility. Importantly, the capture agent is fully removable without special treatment and can be recycled. Moreover, the method generalizes to other MXene compositions (e.g., Ti 2 CT x ) and hydrophilic two-dimensional materials such as graphene oxide. Devices fabricated from semi-solid MXene stored for extended periods exhibit excellent functionalities including infrared stealth, Joule heating, electrochemical energy storage, and electromagnetic interference shielding. This rapid capture and semi-solidification strategy significantly streamlines the transition from MXene synthesis to practical applications, paving the way for industrial-scale utilization of MXene.
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ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Shan Xue,Yue Sun,Jing Cao,Haili Lin,Xiaoling Zang,Shifu Chen
MXene is a promising two-dimensional (2D) metal carbides and nitrides materials for energy storage devices, due to its efficient, low-cost and eco-friendly synthesis technology. MXene possesses high mechanical strength , metallic conductivity, and excellent capacitance performance. However, traditional electrode films obtained from 2D nanomaterials suffer from restacking issue, which hinders the transmission of ion and results in slow ion transport dynamics between layers. The improvement of ion transfer rate of MXene electrode materials is a hot spot in the current research of 2D nanomaterials . Herein, we fabricated the Ti 3 C 2 T x MXene/aramid nanofiber (ANF) composite film with high specific surface area via a freezing method. The obtained MXene/ANF composite film presents high specific capacitance (174.3 F g −1 at a current density of 0.05 A g −1 ), excellent rate performance and high cycling stability (∼84.4% capacity retention after 10 000 cycles). The improvement of electrochemical performance is attributed to the smaller size of 2D sheets that effectively shorten ion diffusion path. Thus, both the diffusion rate and storage ability of electrolyte ions increase in the interstitial space between 2D sheets. In addition, ANF obtained from the commercial Kevlar yarns interacted with 2D sheets to enhance the mechanical strength of the composite films. Thus, the self-supporting MXene/ANF composite film with high specific surface area can be used as an electrode material of supercapacitors to present high specific capacitance and excellent cycling stability. This work provides a simple and effective way to construct high specific surface area 2D materials that present huge potential in energy storage fields.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Hongli Zhang,Yiling Zheng,Hongwei Zhou,Shilin Zhu,Jie Yang
Two-dimensional (2D) nanomaterial-based membranes display attractive properties in molecular separation and transport, which holds their great promise for a host of applications. However, notorious swelling problem of 2D membranes result in unsatisfactory molecular/ions sieving performance, and the enhancement of structural stability for 2D membranes in aqueous solution is still challenging. Herein, we demonstrate how to efficiently stabilize the Ti 3 C 2 T x MXene laminar architecture by the insertion of flexible and hydrophilic carboxylated cellulose nanofibers (CNFs). The importing of CNFs not only acted as a bridge to combine the adjacent 2D Ti 3 C 2 T x sheets and enhance mechanical strength, but also assumed the role of pillar to fix the interlayer distance effectively and improve the anti-swelling properties of Ti 3 C 2 T x membrane. Moreover, the intercalation of nanocelluloses into the interlayer of delaminated Ti 3 C 2 T x is able to distinctly increase the interlayer spacing and create more open gaps for fast and selective molecular transport. When applied in antibiotics separative filtration process, the resultant membrane exhibits outperformed anti-swelling properties in water environment up to 76 h and simultaneously possesses satisfactorily high selectivity of antibiotics (∼99.0 % for azithromycin) with unprecedentedly high pure water permeance (∼26.0 L m −2 h −1 bar −1 ). Such 2D membranes can be easily fabricated by a facile and patternable vacuum-assisted filtration and nanocellulose induced self-assembly strategy, which holds great potential for their scalability that are applicable to many applications such as seawater desalination, industrial wastewater treatment and remediation of aquatic environment.
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Research
·
2020
·
IF 0
Yao Lu,Xinyu Qu,Wen Zhao,Yanfang Ren,Weili Si,Wenjun Wang,Qian Wang,Wei Huang,Xiaochen Dong
Electronic skin is driving the next generation of cutting-edge wearable electronic products due to its good wearability and high accuracy of information acquisition. However, it remains a challenge to fulfill the requirements on detecting full-range human activities with existing flexible strain sensors. Herein, highly stretchable, sensitive, and multifunctional flexible strain sensors based on MXene- (Ti 3 C 2 T x -) composited poly(vinyl alcohol)/polyvinyl pyrrolidone double-network hydrogels were prepared. The uniformly distributed hydrophilic MXene nanosheets formed a three-dimensional conductive network throughout the hydrogel, endowing the flexible sensor with high sensitivity. The strong interaction between the double-network hydrogel matrix and MXene greatly improved the mechanical properties of the hydrogels. The resulting nanocomposited hydrogels featured great tensile performance (2400%), toughness, and resilience. Particularly, the as-prepared flexible pressure sensor revealed ultrahigh sensitivity (10.75 kPa -1 ) with a wide response range (0-61.5 kPa), fast response (33.5 ms), and low limit of detection (0.87 Pa). Moreover, the hydrogel-based flexible sensors, with high sensitivity and durability, could be employed to monitor full-range human motions and assembled into some aligned devices for subtle pressure detection, providing enormous potential in facial expression and phonation recognition, handwriting verification, healthy diagnosis, and wearable electronics.
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RARE METALS
·
2022
·Vol. 41
·期 6
·2084-2093
·
IF 6.318
Cai Zhuo,Ma Yi-Fei,Wang Mei,Qian A.-Niu,Tong Zhao-Min,Xiao Lian-Tuan,Jia Suo-Tang,Chen Xu-Yuan
MXene has given great promises to supercapacitor electrode material due to its high conductivity and redox properties. However, the self-agglomeration of the MXene lamella will reduce its contact area with the electrolyte and generate a tortuous transportation pathway of the electrolyte ions, thereby reducing its capacitive performance and rate capability. In this work, we engineered the electrolyte ion channels by adjusting the MXene lamella size and inserting holey graphene (HG) nanosheets into the interlayer of the MXene flakes. The developed MXene/HG electrode can not only avoid the self-restacking of MXene but also provide unimpeded ion transport channels. As a result, the supercapacitive and rate performances of the small MXene lamella-based MXene/HG (S-MXene/HG) supercapacitor are prominently ameliorated. By adjusting the content of HG, the S-MXene/HG 0.05 electrode exhibits excellent gravimetric capacitance of 446 F·g −1 and a rate capability of 77.5%. The S-MXene/HG 0.05 -based symmetric supercapacitor provides an impressive energy density of 14.84 Wh·kg −1 with excellent cyclic stability of 96% capacitance retention after 10,000 cycles. This demonstration of the engineering of the ion channels shows great potential in two-dimensional material-based supercapacitor electrodes. Graphical abstract
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Materials Today Physics
·
2022
·
IF 11.021
Chuan Liu,Kui Xu,Yongqian Shi,Jiawei Wang,Suning Ma,Yuezhan Feng,Yuancai Lv,Fuqiang Yang,Minghua Liu,Pingan Song
Thermoplastic polyurethane (TPU) has been extensively used in many industrial fields because of its excellent mechanical, electrically insulating and chemical/oil-resistant properties. However, it is inherently flammable and produces a huge amount of heat and smoke upon ignition, significantly impeding its industrial applications. Current fire-retardant strategies often result in significantly reduced flammability , but limited contribution to smoke suppression, and even reduced mechanical properties due to different governing mechanisms. To overcome this hurdle, herein, we reported a titanium carbide-derived nanohybrid (Ti 3 C 2 T x -D-H) via simple hydrogen-bonding assembly. Our results show that the peak of heat release rate and total smoke release yield of TPU nanocomposite containing 2.0 wt% Ti 3 C 2 T x -D-H are decreased by 27.3% and 43.8%, respectively, compared to those of pure TPU. Besides, the resultant TPU nanocomposite shows 32.8% and 56.8% increases in tensile strength and toughness, respectively. The distinguished fire-resistance and mechanical performances are ascribed to the tortuous effect, catalyzed charring and free radicals quenching function of Ti 3 C 2 T x -D-H nanohybrid together with a favorable TPU-Ti 3 C 2 T x -D-H interface. This work offers a promising strategy for simultaneously enhancing the fire resistance, smoke suppression and mechanical robustness of TPU, which is expected to find more industrial applications.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Xuelei Feng,Jianguang Yuan,Yujie Lv,Bogu Liu,Haixiang Huang,Bao Zhang,Youhua Yan,Shumin Han,Ying Wu
Magnesium borohydride (Mg(BH 4 ) 2 ) is an attractive materials for solid-state hydrogen storage due to its high hydrogen content (14.9 wt%). In the present work, the dehydrogenation performance of Mg(BH 4 ) 2 by adding different amounts (10, 20, 40, 60 wt%) of two-dimensional layered Ti 3 C 2 MXene is studied. The Mg(BH 4 ) 2 -40 wt% Ti 3 C 2 composite releases 7.5 wt% hydrogen at 260 °C, whereas the pristine Mg(BH 4 ) 2 only releases 2.9 wt% hydrogen under identical conditions, and the onset desorption temperature decreases from 210 °C to a relative lower temperature of 82 °C. The special layered structure of Ti 3 C 2 MXene and fluorine plays an important role in dehydrogenation process especially at temperatures below 200 °C. The main dehydrogenation reaction is divided into two steps, and activation energy of the Mg(BH 4 ) 2 -40 wt% Ti 3 C 2 composite is 151.3 kJ mol −1 and 178.0 kJ mol −1 , respectively, which is much lower than that of pure Mg(BH 4 ) 2 .
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Journal of Composites Science
·
2024
·Vol. 8
·期 7
·243
·
IF 3
Kishore Chand,M. Mustafa Azeem,Muhammad Nazim Lakhan,Mukhtiar Ahmed,Muhammad Jehanzaib Aslam,Ahmer Hussain Shah
The emergence of 2D materials has significantly expanded the wide range of nanomaterials with diverse applications. Notably, their high conductivity, catalytic efficiency, and hydrophobicity have fueled heightened research interests for water treatment applications. This research aimed to investigate the synthesis and characterization of MXene and reduced graphene oxide (rGO) nanocomposites with silver nanoparticles (Ag) for enhanced catalytic activity in the decomposition of Direct Blue-24 dye. In this study, we employed well-established methods, previously documented in the literature, to prepare two distinct nanocomposites. Novel nanocomposites, namely reduced graphene oxide–silver nanoparticles (rGO–Ag) and MXene–silver nanoparticles (MXene–Ag), were synthesized using the hydrothermal and direct reduction method with an ammoniacal solution (aqueous solution). Comprehensive characterization using advanced tools revealed that the introduced Ag particles integrated seamlessly onto the parent nanofilms of the Carbon derivatives, forming a secondary phase with enhanced catalytic functionality. These nanocomposites demonstrated significant improvements in the catalytic decomposition reactions in simulated wastewater. Verification involved the reduction reaction of Direct Blue-24 dye at known nanocomposite concentrations. The results indicated that MXene–Ag exhibited a superior catalytic activity of 98% in 10 min compared to the rGO–Ag nanocomposite films, which achieved 96% in 35 min. The results indicated that MXene–Ag nanocomposites exhibited a 20–25% increase in catalytic efficiency compared to the rGO–Ag nanocomposites. The outcomes of this research hold promise for practical applications in textile wastewater management and various industrial sectors dealing with mutagenic and carcinogenic chemicals containing azo and/or phthalocyanine products.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Huajun Xu,Jiaxing Fan,Di Pang,Yingying Zheng,Gang Chen,Fei Du,Yury Gogotsi,Yohan Dall'Agnese,Yu Gao
Ferric vanadate (FeVO 4 ) is a desirable anode candidate for lithium-ion battery (LIB) and sodium-ion battery (SIB) because of its high theoretical capacity, low cost and ease of synthesis. However, its practical application is hindered by its volume expansion during the Li + /Na + insertion/extraction and low electronic conductivity. Herein, flexible and free-standing FeVO 4 /Ti 3 C 2 T x (FVO/MX) films have been made via combining FeVO 4 nanorods and Ti 3 C 2 T x MXene sheets via a simple method of vacuum assisted filtration. In the composite films, Ti 3 C 2 T x sheets act as host and FeVO 4 nanorods are uniformly deposited onto the layers. FeVO 4 nanorods are encapsulated by Ti 3 C 2 T x sheets, forming a three-dimensional network sandwich structure. The binder-free FVO/MX films exhibited superior electrochemical performance due to the synergyy between FeVO 4 and Ti 3 C 2 T x . Specifically, when FVO/MX electrode was used in a lithium-ion battery, it delivered reversible capacity of 1179 mAh g −1 and 1125 mAh g −1 after 250 cycles at a current density of 0.1 A g −1 . Besides, the FVO/MX = 2:1 anode delivered a reversible capacity of 428 mAh g −1 at 5 A g −1 and 69.5% capacity was retained after 2500 cycles. Moreover, the Na-ion storage capacity reaches 129 mAh g −1 at a high current density of 5 A g −1 , showing capacity retention of 81.1% after 5000 cycles. The charging and discharging mechanism of the FVO/MX based lithiumion battery was studied by in-situ XRD technique. Owing to high metallic conductivity and 2D morphology of Ti 3 C 2 T x MXene, 3D networks can be constructed by combining other active agents, suggesting that MXene is a promising host material for the next-generation flexible energy storage devices.
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Cell Reports Physical Science
·
2022
·
IF 7.832
Li Yin,Chenguang Liu,Changzeng Ding,Chun Zhao,Ivona Z. Mitrovic,Eng Gee Lim,Haibin Wang,Yi Sun,Yunfei Han,Zerui Li,Li Yang,Chang-Qi Ma,Cezhou Zhao
Summary An appropriate electron transport layer (ETL) with better energy alignment and enhanced charge transfer, thereby helping efficient extraction and transport of photogenerated carriers, is essential to achieve the creation of high-performance devices. In this work, we use functionalized MXene modified with fluoroalkylsilane and dodecyltrimethoxysilane molecules, denoted as SnO 2 -MF and SnO 2 -MH, as nanosheet dopants in the SnO 2 ETL. From density functional theory (DFT) calculations and ultraviolet photoelectron spectra (UPS) spectra, we see that better band alignment is achieved for the SnO 2 -MH ETL. Meanwhile, functionalized MXene nanosheets represent high electrical conductivity and mobility and could form zero Schottky barrier heterojunction with SnO 2 , effectively and rapidly enhancing carrier transfer. Finally, the suitable surface energy achieved by functionalized MXene additives can enlarge the grain size of perovskite thin films. Consequently, a significant improvement of power conversion efficiency (PCE) from 20.98% to 23.66% (24.12% for the champion device with a fill factor [FF] over 0.84) can be achieved for devices based on the SnO 2 -MH ETL, which also possess improved moisture resistance and operational stability.
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危险品化学品经营许可证（带存储）