Batteries & Supercaps
·
2025
·
IF 4.7
Jing Zhang,Yi Zhao,Jing Liu,Zhaoyang Li,Abdulraheem SA Almalki,Gaber A. M. Mersal,Mohamed M. Ibrahim,Hassan Algadi,Huige Wei,Xuanye Wang,Zhanhu Guo
Graphical The prepared polyurethane (PU)/MXene-1.6 electrode exhibits excellent electrochemical performance. The assembled symmetrical PU/MXene-1.6-SC has a specific mass capacitance of 123.2 F·g −1 at a current density of 0.5 A·g −1 , a power density of 630.8 W·kg −1 , and a corresponding energy density of 4.8 Wh·kg −1 . PU/MXene-1.6-SC also demonstrates good flexibility. This study provides a promising strategy for the preparation of high-performance flexible supercapacitors. Conventional supercapacitors have encountered application bottlenecks due to their poor flexibility. In this context, a flexible polyurethane (PU)/MXene electrode is constructed by directly depositing MXene on PU substrate that is prepared by solvent casting method. In contrast to the pure MXene film, the elongation at break of the PU film prepared with a mass fraction of 9% reaches up to 435%, 94 times higher than that of the pure MXene film. At an optimum loading amount of 1.6 mg·cm −2 , PU/MXene film delivers a high mass-specific capacitance of 276 F·g −1 , 1.57 times that of 175 F·g −1 for pure MXene, at a current density of 1-A·g −1 under the three-electrode system. In the two-electrode system with polyvinyl alcohol/sulfuric acid as the gel electrolyte, the PU/MXene//PU/MXene-based symmetrical supercapacitor exhibits a high mass-specific capacitance of 123.2 F·g −1 at 0.5 A·g −1 , with a power density of 630.8-W·kg −1 , corresponding to an energy density of 4.8 Wh·kg −1 . The device still maintains 80.2% of the initial capacitance after 5000 cycles. In addition, there is no remarkable decrease in the electrochemical performance after repeated bending at different angles. This study provides a promising strategy for the facile preparation of high-performance flexible supercapacitors.
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Microsystems & Nanoengineering
·
2024
·Vol. 10
·期 1
·1-9
·
IF 7.3
Guo Shanlu,Zhu Ruihe,Chen Jingwei,Liu Weilin,Zhang Yuxiang,Li Jianmin,Li Haizeng
With the increasing demand for multifunctional optoelectronic devices, flexible electrochromic energy storage devices are being widely recognized as promising platforms for diverse applications. However, simultaneously achieving high capacitance, fast color switching and large optical modulation range is very challenging. In this study, the MXene-based flexible in-plane microsupercapacitor was fabricated via a mask-assisted spray coating approach. By adding electrochromic ethyl viologen dibromide (EVB) into the electrolyte, the device showed a reversible color change during the charge/discharge process. Due to the high electronic conductivity of the MXene flakes and the fast response kinetics of EVB, the device exhibited a fast coloration/bleaching time of 2.6 s/2.5 s, a large optical contrast of 60%, and exceptional coloration efficiency. In addition, EVB acted as a redox additive to reinforce the energy storage performance; as a result, the working voltage window of the Ti 3 C 2 -based symmetric aqueous microsupercapacitor was extended to 1 V. Moreover, the device had a high areal capacitance of 12.5 mF cm −2 with superior flexibility and mechanical stability and showed almost 100% capacitance retention after 100 bending cycles. The as-prepared device has significant potential for a wide range of applications in flexible and wearable electronics, particularly in the fields of camouflage, anticounterfeiting, and displays.
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高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2019
·Vol. 34
·期 2
·299-302
·
IF 0.605
Yan Ming,Yang Lei,Li Chao,Zou Yunqi
We prepared a two-dimensional transition metal carbide Ti 2 CT x by treatment of Ti2AlC in molten fluoride salt. Two fluorinated salt systems were used to etch Al from Ti 2 AlC powder precursor under the argon atmosphere, and then the resulting MXene was delaminated with TBAOH to produce few-layered nanosheets of Ti 2 CT x . The reaction was undergone at different temperatures to study the effect of temperature. The results show that the optimal reaction temperature is 600 °C in LiF-NaF-KF system, and 850 °C in NaFKF system. The molten salt treated products are delaminated and quasi-2D MXene sheets can be obtained. The thickness of the MXene sheets prepared from the binary molten salt system is smaller than that of the ternary molten salt system.
研究领域:
材料科学
·
化学工程
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ACS Applied Nano Materials
·
2026
·
IF 5.5
Chengxu Wang,Longlong Tian,Jiahui Li,Hao Wu,Sheng Li,Jing Ma,Yaxin Wang,Wenliang Fan,Jian Ni,Fuhua Hou,Yanlai Wang,Chengjun Zhu,Tiantian Li
Achieving high-performance flexible electronics requires material systems capable of unifying mechanical resilience with multifunctional properties such as electrical conductivity and thermal management. In this study, a monolithic, self-supporting composite membrane with an interpenetrating network of MXene, aramid nanofiber (ANF), and Ag nanoparticles was successfully fabricated via a one-step process that integrates vacuum-assisted filtration with in situ redox assembly. In this integrated architecture, ANFs form a robust mechanical scaffold. MXene nanosheets establish a foundational conductive network. Critically, the in situ formed AgNPs act as conductive bridges, electrically interconnecting the MXene sheets to significantly enhance the overall electrical conductivity. The sequential addition protocol, finalized with extra MXene, optimizes this ternary network by enhancing dispersion and interfacial compatibility, yielding a stable, synergistic structure. Benefiting from multilevel interfacial synergy, the resulting 40 μm-thick monolithic membrane integrates multiple high-performance functions, an EMI shielding effectiveness of 48 dB, rapid Joule heating up to 210 °C within 20 s at a low voltage of 1.5 V, and notable electrochemical activity. When used as a freestanding electrode for zinc-ion storage, it delivers an areal capacity of 1.7 mAh cm–2 with remarkable rate capability. This work establishes a scalable, integrated fabrication strategy, offering a robust platform for next-generation applications in wearable electronics, thermal management, and microenergy systems.
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Journal of Energy Storage
·
2022
·
IF 8.907
Changhai Li,Guohua Jiang,Muslum Demir,Yanfang Sun,Rui Wang,Tianqi Liu
In this study, reduced graphene oxide/MXene-based composite electrodes combined with Fe 2 O 3 and NiCo-P as the negative and positive electrodes are prepared by a facile in-situ solvothermal route. Both rGO/MXene@Fe 2 O 3 and rGO/MXene@NiCo-P have an interconnected nanostructure with the specific surface areas at 17.1 and 131.9 m 2 ·g −1 . The specific capacitance of the as-prepared rGO/MXene@Fe 2 O 3 and rGO/MXene@NiCo-P composite electrodes are 248.13 and 214.66 mAh·g −1 under current density at 1 A·g −1 . An asymmetric supercapacitor (ASC) is further assembled using rGO/MXene@Fe 2 O 3 and rGO/MXene@NiCo-P as the negative and positive electrodes, respectively. The maximum energy density of the assembled ASC is 29.46 Wh·kg −1 at a power density of 700.34 W·kg −1 . After 10,000 cycles, 70.87 % of the capacity can be retained. These results demonstrate the potential application of composite electrode materials for supercapacitors .
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xin Zhang,Shukai Chen,Jiazhen Cai,Shane King,Cai Liu,Wenjing Yuan,Rong Wang,Gongkai Wang
Stretchable supercapacitors with simultaneously high energy/power densities and long life can enrich integrated power options for ever-increasing wearable electronics. However, supercapacitors with high electrochemical performances while maintaining high stretchability are still challenging. Herein, we report stretchable sodium ion capacitors (S-SICs) based on multi-dimensionally and hierarchically elastomeric composite electrodes, and stretchable high voltage gel polymer electrolyte (3.0 V). The elastomeric composite electrode is constructed by stretchable 3D electrospun polyurethane (PU) fibrous mat and conductive 1D Ag nanowire network. 2D MoSe 2 /MXene and 3D AC/MXene as anodic and cathodic materials are embedded in this conductive and stretchable mat. This hierarchical structure enables multi-dimensional conductive connections under tensile condition. The pre-strain treatment on PU fibrous mat further increases the relatively stretching distance before losing conductive connection among hierarchical components. The electrodes exhibit superior sodium ion storage performances (420 mAh g −1 at 5 A g −1 ), as well as good stretchability and stability (95% after 1000 cycles at 2 A g −1 ). Based on this, the S-SICs with high operating voltage demonstrate high energy/power densities (max. 5.44 mWh cm −3 , 493.55 mW cm −3 ) and good stretchability. This prototypical exhibition of S-SICs indicates a promising design direction of stretchable supercapacitors with high electrochemical performances and tolerance of stretchability.
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CARBON
·
2024
·
IF 10.5
Xiaotong Sun,Ze Wu,Xiuli Tan,Youqiang Xing,Peng Huang,Bingjue Li,Lei Liu
Research on developing highly efficient microwave absorption (MA) absorbers is crucial for addressing electromagnetic (EM) pollution and advancing stealth technology. MXene, a new class of MA materials, have been widely studied . Nevertheless, MXene often faces challenges such as high self-stacking and excessive electrical conductivity, which lead to poor impedance matching. To overcome these problems, the unique manufacturing produces an overall homogeneous and locally aggregated MXene in the form of island chains, enhancing electrical conductivity and polarization loss while alleviating the self-stacking problem of MXene nanosheets. Further improvement is achieved by modifying the N–CNF@MXene aerogel with MoS 2 through atomic layer deposition (ALD). This modification resulted in a layered core-sheath structure featuring the N–CNF@MXene@MoS 2 aerogel (NCMMA) absorber. Importantly, this process preserved the intrinsic structure of the material while significantly enhancing its MA performance. NCMMA has a minimum reflection loss RL min of −78.32 dB (3.49 mm) with a fill factor of only 3.97 %. The effective absorption bandwidth (EAB) is 7.58 GHz (2.5 mm), covering the Ku band. The unique joint process design of hierarchical core-sheath in situ heterogeneous interfaces combined with the complex interpenetrating conductive network structure employed in this work is a strong candidate for MA materials for next-generation lightweight stealth coatings.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 9
·6168-6177
·
IF 2.779
Chen Pu,Zhao Zhihua,Shao Zhigang,Tian Ye,Li Bo,Huang Bo,Zhang Shuaiwen,Liu Chunbo,Shen Xiaoqing
Semiconducting nanomaterials with different sizes and shapes have wide applications in the field of electronics, and one of the key pathway to improve their performance is by recombination of different materials. In our innovative work, the nanocomposites of polypyrrole (PPy) and MXene were prepared by a simple in situ polymerization reaction. The samples were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The samples were made into sensors, and the gas sensitivities of the materials were investigated under different test conditions. The results showed that the response value of PPy/MXene-12 sensor to 100 ppm ammonia at room temperature was 2.38 times than that of pure PPy and 6.38 times than that of pure MXene. In addition, the sensor has excellent selectivity and low detection limit, which demonstrate the excellent practicability of them in the field of Internet of Things (IoT).
研究领域:
材料科学
·
电子工程
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Jiamin Xiao,JingJing Su,Jiaxu zhang,Ruqin Wan,Ye Chen,Wei Wan
The escalating challenges of electromagnetic pollution and interference have created an urgent demand for high-performance electromagnetic wave absorption materials. This study presents the successful fabrication of flexible Ti 3 C 2 T x MXene/millable polyurethane (MPU) composites through a straightforward blending and hot-pressing process. The microwave absorption properties was effectively tailored by controlling the content and morphology of the Ti 3 C 2 T x MXene filler. Results demonstrate that increasing the content of etched Ti 3 C 2 T x MXene from 0 to 35 wt% progressively enhanced the absorption properties. The composite with 35 wt% loading achieved an optimal reflection loss (RL min ) of −39.24 dB at 10.86 GHz and an effective absorption bandwidth (EAB) of 1.40 GHz. A remarkable improvement was observed when exfoliated and centrifuged Ti 3 C 2 T x MXene was utilized as the filler. The composite containing 35 wt% exfoliated and centrifuged Ti 3 C 2 T x MXene exhibited a superior RL min of −60.24 dB at 15.76 GHz and a broader EAB of 2.21 GHz at a matching thickness of 4.5 mm. This work underscores the significant potential of Ti 3 C 2 T x MXene/MPU composites as high-performance, flexible microwave absorbers and identifies the exfoliation and centrifugation process as a critical factor for maximizing absorption capability.
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ACS Sensors
·
2026
·
IF 10.9
Donghang Li,Yida Wang,Haomin Wang,Haojie Lu,Shuo Li,Xunen Wu,Huarun Liang,Yingying Zhang
Exhaled ammonia is a vital biomarker for clinical diagnosis of hepatorenal dysfunction and metabolic disorders. However, conventional sensors are often limited by complex fabrication processes, high operating temperatures, and particularly, compromised selectivity under high-humidity conditions. To overcome these challenges, we developed a laser-assisted heterostructure engineering strategy that enables in situ construction of Schottky barrier in MXene/polyacrylonitrile (PANF) nanofiber membranes, termed as a laser-engineered MXene (LEM) sensor. The laser micropatterning technique provides three key innovations: (1) kinetically controlled deposition of MXene (Ti3C2Tx) with minimal oxidation, (2) self-aligned formation of Schottky barriers through interfacial TiO2/MXene heterojunctions, and (3) creation of hierarchical gas transport channels within the 3D nanofibrous matrix. The optimized LEM sensor exhibits outstanding sensitivity (2.5% ppm−1), a low detection limit (0.2 ppm) at room temperature (25 °C), and humidity operation stability (> 10% response at 90% relative humidity). This performance surpasses that of conventional MXene-based sensors by fivefold in sensitivity without the need for thermal activation. Mechanism studies reveal that the laser-induced heterointerface facilitates charge transfer-dominated ammonia adsorption and desorption kinetics, while the nanofibrous architecture ensures molecular accessibility to active sites. This ambient-processable and scalable fabrication method paves the way for advanced wearable breath analyzers by combining manufacturing versatility, humidity-resistant excellent selectivity, and energy-efficient operation.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Wu Wang,Tianjiao Cai,Zhongjun Cheng,Yuqi Yang,Jingfeng Wang,Jianxin Tang,Li Tang,Wen Feng,Yuyan Liu,Zhimin Fan
Stimulus-responsive MXene films demonstrate extensive application scenarios, such as artificial muscles and biomedical devices. However, the shape deformation of such materials entails continuous stimulation, thus limiting their implementation in specific fields when temporary shapes have to be maintained without external stimuli. This work fabricates a kind of shape-programmable MXene-based supermolecular nanocomposite film by integrating MXene and polyvinyl alcohol. In this film, MXene provides extra intermolecular hydrogen bond interaction between polyvinyl alcohol and acts as cross-linking points in the nanocomposite, thus endowing this film with a good shape-fixing property. Furthermore, with the osmotic plasticization of water on the polyvinyl alcohol chains, the as-prepared nanocomposite film demonstrates excellent water-responsive shape-memory performance. This material cannot only overcome the inability of traditional stimulus-responsive MXene films to maintain temporary structures without continuous stimulation, but also expands potential applications in some fields including controlled release and intelligent bio-robots.
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DIAMOND AND RELATED MATERIALS
·
2022
·
IF 3.806
Sen Jin,Yitong Guo,Junkai Wang,Libo Wang,Qianku Hu,Aiguo Zhou
In this paper, the CO 2 adsorption behaviors of Mo 2 C MXene were explored for the first time. Two-dimensional (2D) Mo 2 C MXene samples were prepared by hydrothermal etching in four different solutions (LiF, NaF, KF or NH 4 F with HCl). The sample made by LiF + HCl etching exhibited the highest capacity of 3.66 mmol g −1 , which is consistent with theoretical calculation that Mo 2 CO 2 decorated by Li has stronger interaction with CO 2 than those of Na and K. Although Mo 2 C MXene has low specific surface area (SSA, 4.9–8.9 m 2 g −1 ) as compared with those of Ti 3 C 2 (21 m 2 g −1 ) and V 2 C (9 m 2 g −1 ) MXenes, Mo 2 C MXene possesses better performance on CO 2 capture than Ti 3 C 2 (1.33 mmol g −1 ) and V 2 C (0.52 mmol g −1 ) MXenes at 4 MPa. This is because the CO 2 adsorption of Mo 2 C MXene is mainly physical absorption formed by the capillary condensation in mixed pores (micropores and mesopores) and slitlike pores between two Mo 2 C MXene flakes. Besides, the CO 2 adsorption on the surface of Mo 2 C MXene with functional groups (O or F) shows a current of chemisorption feature. This work indicates that Mo 2 C MXene is a promising candidate for CO 2 capture and storage material.
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