POLYMER DEGRADATION AND STABILITY
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2025
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IF 7.4
Qinling Liu,Junhan Chu,Yuhui Xie,Zhaoyu Li,Feng Wu,Dong Feng,Yang Meng,Yi Mei,Delong Xie
s The development of high-performance flame-retardant polypropylene (PP) composites is essential for enhancing fire safety across various industries. However, conventional intumescent flame retardant systems often suffer from poor char stability, weak condensed-phase protection, and insufficient gas-phase flame inhibition. To address these challenges, this study introduces a synergistic system combining Si-modified MXene (Si-MXene) and piperazine-modified ammonium polyphosphate (PAPP) to enhance the flame retardancy of PP composites. The piperazine modification of PAPP improves its compatibility with PP, facilitating uniform dispersion and enhancing its catalytic charring capability. Simultaneously, Si-modified MXene reinforces the char layer by promoting the formation of a highly graphitized and compact carbon structure, effectively blocking heat and oxygen transfer. As a result, the Si-MXene/PAPP system significantly reduces the peak heat release rate (PHRR) of PP by 52.6% and total heat release (THR) by 35.4%, while substantially improving thermal stability and char quality. Moreover, gas-phase analysis confirms that phosphorus radicals (P·, PO·) and non-flammable gases (NH₃, H₂O) scavenge combustion free radicals and dilute flammable volatiles, effectively suppressing flame propagation. This study provides a novel approach to de veloping high-efficiency flame-retardant PP composites, offering new insights into the synergistic mechanisms of MXene-based hybrid flame retardants and advancing the design of eco-friendly, high-performance polymeric materials for safety-critical applications.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Jingdi Shang,Libo Wang,Ying Gao,Ji’a Yang,Qixun Xia,Qianku Hu,Aiguo Zhou,Bo Wang
Due to its unique structure and performance, Ti 3 C 2 T x has been widely investigated as an electrode material for flexible energy storage devices using hydrogel as a solid electrolyte. The composition and structure of hydrogels determine their poor performance at high temperatures and there is little research on MXene flexible devices at high temperature. In this work, we designed a method for preparing capacitors with Ti 3 C 2 T x as the electrode material and ionic liquid as the electrolyte. By leveraging the high permeability of ionic polymer solution, a seamless electrode-electrolyte interface is constructed. The device can achieve a maximum capacitance of 173.8 mF cm −2 at a 5 mV s −1 scan rate, with a maximum specific energy density and power density of 96.57 μWh cm −2 and 1.74 mW cm −2 , respectively. The capacitor retains 89.5 % of its initial capacitance after 20,000 cycles, demonstrating excellent cycle stability. Importantly, the supercapacitor can operate at 100 °C with a specific capacitance of 278.66 mF cm −2 . In addition, the designed device can retains 100 % or more of its capacitance even after 1000 cycles of 180° bending，demonstrating robust mechanical performance. This work provides a reference for studying the application of MXene in high-temperature flexible supercapacitor.
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MATERIALS RESEARCH BULLETIN
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2025
·
IF 5.7
Bo Kang,Chunhui Bai,Letian Huang,Chunling Zhu,Xiao Zhang,Yujin Chen
Electromagnetic pollution, driven by the proliferation of high-frequency electronic gadgets, presents substantial threats to human health and environment. Electromagnetic wave absorption (EMA) materials are critical for mitigating these effect. MXene, a two-dimensional material with high conductivity, shows promise but often suffers from reflection due to poor impedance matching. Herein, we propose an efficient MXene-based composite material composed of N-doped carbon-coated TiO 2 on MXene hollow spheres (TiO 2 /M@NC). The TiO 2 /M@NC composite exhibits a remarkable minimum reflection loss of −43.4 dB at 2.25 mm thickness and an effective absorption bandwidth of 4.64 GHz at 2.00 mm thickness, outperforming many reported MXene composites. Experimental results demonstrate that the hollow structure and abundant interfaces enhance dielectric loss and impedance matching, synergistically optimizing electromagnetic wave absorption. This work provides a promising approach for the development of advanced EMA materials with superior absorption performance.
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Journal of Magnesium and Alloys
·
2025
·
IF 13.8
Xiaojiao Wang,Zhenluo Yuan,Yang Shi,Shangsheng Li,Guofa Mi,Qiuming Peng,Shumin Han,Yanping Fan,Baozhong Liu
Magnesium hydride (MgH 2 ) has received widespread attention because of its high hydrogen capacity and low cost, but the sluggish kinetics limited its practical application. Herein, the two-dimensional Mo 2 C MXene was constructed to motivate the efficient hydrogen storage in MgH 2 for the first time. After doping 10 wt% Mo 2 C MXene, the starting dehydriding temperature was lowered to 225 °C, presenting a 117 °C reduction compared with that of as-received MgH 2 . The 10 wt% Mo 2 C-containing MgH 2 sample could rapidly release 6.7 wt% H 2 in 13 min at 300 °C, and the product after hydrogen release could absorb 6.0 wt% H 2 in 12 min at 200 °C, showing superior hydriding and dehydriding kinetics. Moreover, the activation energy ( E a ) of MgH 2 –10 wt% Mo 2 C (107.58 ± 1.57 kJ/mol) was obviously lower than that of pure MgH 2 (130.45 ± 1.97 kJ/mol), and the reduced activation energy explained the reduced dehydrogenation temperature and enhanced kinetics. Microstructure characterization revealed that Mo-species (Mo 0 and Mo 2+ ) formed during ball milling served as active species accelerated the hydriding/dehydriding reactions, and the uniformly distributed active species and the interaction between Mo and O jointly promoted the hydrogen storage properties of MgH 2 .
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POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Jingjing Gao,Yadong Wang,Li Ma,Zongmin Zhu,Fei Xiao
The development of biodegradable polymers with excellent flame retardancy and mechanical robustness remains a critical challenge for sustainable materials. In this paper, a novel MXene nanohybrid (MXene-PPD) was prepared by grafting organic phosphorus-containing polymer onto MXene using interface engineering strategy. The incorporation of merely 2.5 wt % MXene-PPD into poly(lactic acid) (PLA) matrix remarkably enhances its flame retardancy, elevating the limiting oxygen index (LOI) from 19 % to 23.1 % and achieving a UL-94 V-0 rating. Cone calorimetry analysis demonstrates a 11 % reduction in peak heat release rate (PHRR) for the PLA/2.5MXene-PPD composite compared to neat PLA. The superior interfacial adhesion of MXene-PPD in PLA composites facilitates efficient stress transfer, resulting in demonstrated enhancements of up to 13.6 % in tensile strength and 13.9 % in impact resistance compared to unmodified PLA. These findings highlight the potential of MXene-PPD as an effective additive for developing high-performance biodegradable polymers.
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JOURNAL OF ELECTRONIC MATERIALS
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2025
·
IF 2.5
Yang Xiaoli,Zhang Xiaomin,Zhang Han,Cong Yuhan,Wang Zitan,Ye Erkang
MXene-based hydrogels have become important materials for epidermal applications due to their excellent conductive properties and biocompatibility. Nonetheless, the application of such materials in the epidermal field is limited because of insufficient mechanical properties, unidimensional stimulus response, and complex preparation methods. In this study, an MXene-based hydrogel with outstanding self-healing, temperature sensitivity, and pH sensitivity was prepared by a one-pot method at 60°C for 5 h. The hydrogel is composed of Ti 3 C 2 T x MXene nano-slices, polyacrylamide (PAM), poly( N -isopropylacrylamide) (PNIPA), and polyacrylic acid (PAA), denoted as MXene/PAM/PNIPA/PAA hydrogel (MPANA hydrogel). The MPANA hydrogel exhibits excellent mechanical properties. Its tensile strength, elastic modulus, toughness, and elongation at break are 2.79 MPa, 0.64 MPa, and 51 MJ/m 3 , 412%, respectively, which indicates that the hydrogel possesses good stretchability. Moreover, the MPANA hydrogel demonstrates good self-healing ability, attaining an average strain self-healing efficiency of 94%, achieved in 12 h. Additionally, the MPANA hydrogel shows impressive thermal response sensitivity (−1.3560% °C −1 ) and a rapid pH response time (32–53 s). In conclusion, the MPANA hydrogel has significant potential for applications in epidermal sensors. Graphical
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Xiaoyang Zhang,Xuefei Zhang,Hai-Tao Ren,Ting-Ting Li,Ching-Wen Lou
Harvesting energy from naturally abundant water resources is expected to alleviate the need for the current energy shortage. However, existing studies rarely consider the effect of capacitors on the output of hydropower generation. Here, inspired by capacitors, we prepared a flexible and efficient hydrovoltaic generator by loading polypyrrole (PPy) and Ti 3 C 2 Tx MXene onto cotton fabrics by a simple green one-step synthesis method with self-assembly. Specifically, the ionic imbalance at the interface can be exacerbated by the use of expanded capacitance, while synergistically the two materials PPy/MXene will adsorb different ions, which promotes efficient adsorption of ions and ensures energy conversion. This generator can produce an open-circuit voltage (V OC ) of 0.35 V and a short-circuit current (I SC ) of ~260 μA in just 5 mL of a 3.5 wt% NaCl solution, and the optimized device can achieve an output power of 35.76 μW. Furthermore, this capacitance-enhanced fabric-based hydrovolt generator can directly power electronic devices and demonstrates its potential future applications in practical applications such as respiratory monitoring and touch sensing.
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PubMed
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhi Qian,Zhao-Dong Qiu,Rui-Qing Wang,Mei-Tong Wei,An-Min Fei,Zhi-Yi Hu,Hemdan S.H. Mohamed,Li-Hua Chen,Yu Li,Bao-Lian Su
All-solid-state batteries (ASSBs) have obtained much attention due to the high energy density and security. At present, PEO-based solid-state batteries are considered to be one of the most promising candidates for high-performance ASSBs due to the excellent processability and good interfacial stability. However, low ionic conductivity and Li + transference number seriously hinder their progress in practical applications. Here, a novel filler is developed by embedding ionic liquid (IL) grafted onto the surface of MXene to improve the electrochemical performance of PEO-based solid composite polymer electrolyte (MXene-IL-SPE) for ASSBs. The 2D MXene can significantly reduce the crystallinity of PEO, and the presence of IL not only enhances the dispersion of MXene in the polymer matrix, but also promotes the dissociation of lithium salts and anchors anions. As a result, the MXene-IL-SPE possesses high ionic conductivity (7.19 × 10 −4 S cm −1 ) and Li + transference number (0.51), together with wide electrochemical window (5.2 V) at 60 °C. The assembled LiFePO 4 |MXene-IL-SPE|Li full cell exhibits remarkable rate capability and exceptional capacity of 154.8 mAh g −1 over 120 cycles with an impressive 95.3 % capacity retention at 0.5 C. This design opens up a new way to prepare high performance CPEs for ASSBs.
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JOURNAL OF POWER SOURCES
·
2021
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IF 9.127
Hao Liu,Pan He,Jiaxin Cao,Tao Duan,Qingquan Kong,Weitang Yao
The nature of vanadium oxides with multiple valence states and a rich species of oxides facilitates the construction of high performance batteries. Among these, vanadium dioxide (VO 2 ), despite offering several advantages, is seldom reported in anode materials due to its inferior cycling stability and rate performance caused by large volume changes. Herein, we employed a rational structural strategy to assemble VO 2 -NTs/Ti 3 C 2 anode with a multidimensional cross-linked structure using VO 2 nanotubes (VO 2 -NTs) and Ti 3 C 2 T x MXene . Specifically, the abundant multidimensional channels of VO 2 -NTs/Ti 3 C 2 reduce the diffusion impedance of the ions, and the enhanced intrinsic conductivity and highly robust structure solve the problems originally present in VO 2 , which are verified in characterization and density functional theory calculations. Consequently, the composite electrode shows ultra-high reversible capacity (1425 mAh g −1 at 1 A g −1 ), excellent cycling performance (516 mAh g −1 at 5 A g −1 after 2000 cycles) and superior rate performance (703 mAh g −1 at 10 A g −1 ), and also exhibits decent sodium storage performance, representing the best comprehensive battery performance of VO 2 -based anodes to date.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xudong Liu,Yong Liu,Shangli Dong,Xuefeng Zhang,Lu Lv,Sirui He
Constructing 3D porous MXene from 2D nanosheets is the most efficient method to avoid restacking of nanosheets and enhance the application of nanomaterials at macroscale. Direct foaming from solids is an ideal means to obtain 3D porous structure. However, MXene is difficult to be physically foamed because its plasticity is not enough. Herein, we invent a chemical foaming method to convert MXene films into foams with good porosity. The wet film of Ti 3 C 2 T x precursor with interlayer water has super high plasticity, which is more conducive to the introduction of foaming agent and the foaming process. The obtained Ti 3 C 2 T x foams exhibits good porosity and higher specific surface area than Ti 3 C 2 T x films, resulting in outstanding capacitive performance (426 F g −1 at 1 A g −1 ) with good rate performance (190 F g −1 at 10 A g −1 ) and excellent cycle stability (92% retention after 10,000 cycles). The supercapacitor fabricated with Ti 3 C 2 T x foams display an outstanding energy density of 14.1 Wh kg −1 at a power density of 250 W kg −1 . Moreover, the foaming method creates a up-bottom construction patterns, which is simple, low cost and easy for scalable fabricating porous MXene.
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RARE METALS
·
2022
·Vol. 41
·期 5
·1626-1636
·
IF 6.318
Wang Hui-Qi,Zhao Ya-Xin,Gou Li,Wang Li-Yong,Wang Mei,Li Ying,Hu Sheng-Liang
The fast and reversible sodiation/desodiation of anode materials remains an indelible yet fascinating target. Herein, a class of the densely packed Si/MXene composite microspheres is constructed and prepared, taking advantages of the synergistic effects of the activated Si nanoparticles and conductive flower-like MXene microspheres with ample ion-diffusion pathways. Consequently, the intrinsic MXene nanosheets with intelligently regulated interlayer spacing can accommodate the volume change induced strain during cycling, and the strong interaction between the Si and MXene matrix greatly contributes to the robust structural stability. As expected, the Si/MXene composite architecture exhibits boosted sodium storage performance, in terms of an inspiring reversible capacity of 751 mAh·g −1 at 0.1 A·g −1 , remarkable long-term cycling stability of 376 mAh·g −1 at 0.1 A·g −1 over 500 cycles, and outstanding rate capability (after one consecutive current density changing from 0.1 to 2.0 A·g −1 , a large capacity of 275 mAh·g −1 is regained after suddenly returning the initial current density back to 0.1 A·g −1 and in the subsequent 200 cycles this composite architecture anode still delivers a capacity of 332 mAh·g −1 ). The kinetics analysis indicates superior pseudocapacitive property, high electronic conductivity, and favorable sodium-ion adsorption and diffusion capability, confirming fast sodium storage performance. Impressively, ex-situ X-ray diffraction and selected area electron diffraction characterizations corroborate the formation of NaSi 6 as the main sodiation products during the reversible evolutions of cycled proceeding with sodium-ion insertion. This work sheds light on the elaborate design of silicon-based nanostructured anodes towards advanced high-performance sodium-ion batteries. Graphical abstract
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zihan Wang,Liuxin Yang,Yang Zhou,Chen Xu,Mi Yan,Chen Wu
Cross-linking network structures are critical to construct flexible and lightweight electromagnetic (EM) wave absorbers, for which effective regulation of the EM parameters is essential. Herein, a versatile strategy has been developed by interconnecting carbon fibers with NiFe-layered double hydroxide (NiFe LDH)/MXene derivatives. The large-sized flaky morphology and conductive nature of the interconnectors induce the percolation effect in the fabric networks with ultralow addition. As such, efficient adjustment of the EM parameters can be achieved by tuning the content of the interconnectors around the percolation threshold, giving rise to an optimal reflection loss (RL) of −58.0 dB and a wide effective absorption band (EAB) of 7.0 GHz at a thickness of 2.5 mm under the incorporation of 7.0 wt % NiFe LDH/MXene. This work provides insights on constructing percolation networks and effective manipulation of electronic and magnetic properties, which can be extended to various areas such as sensing, catalysis, and energy storage.
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