Energy Storage Materials
·
2022
·
IF 20.831
Wei Yang,Qiankun Han,Wenshi Li,Maosheng Wu,Jing Yao,Man Zhao,Xianmao Lu
Redox-enhanced electrochemical capacitors (redox ECs) are promising energy-storage devices with the potential to deliver both high power and energy performances, although overcoming the severe self-discharge remains a great challenge due to the shuttle effect of redox species such as I − /I 3 − ions introduced in the electrolytes for gaining additional capacities. Herein, we propose a cation-initiated self-assembly process of Ti 3 C 2 T x MXene nanosheets onto glass fiber membranes to form Janus separators that can mitigate the shuttling of I − /I 3 − ions in iodine-based redox ECs. The interlayer spacing of the MXene films can be controlled by selecting different cations such as imidazolium (C 4 mim + ), Mg 2+ , and Al 3+ , therefore the resulting Janus separators exhibit tailored nanochannels for ion sieving. Both molecular dynamic (MD) simulations and electrochemical tests indicate that C 4 mim + -intercalated MXene Janus separators (C 4 mim + -MXene) can block the diffusion of I 3 − ions while allowing the pass of other electrolyte ions. As a result, self-discharge caused by the shuttle effect can be much reduced in C 4 mim + -MXene-based redox ECs, which deliver voltage and energy retentions substantially higher than that of the cells using glass fiber membrane separators (voltage retention: 70% vs. 10%, energy retention: 51% vs. 6.5%) after 24-h open-circuit test.
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Energy Storage Materials
·
2023
·
IF 20.4
Jingya Yu,Chunhong Chen,Fangyi Shi,Renjie Li,Feiyang Chen,JingJing Tang,Kang Cheung Chan,Zheng-Long Xu
Aqueous zinc ion batteries are regarded one of the most promising next generation battery technologies for safe and low-cost energy storage applications . However, the inevitable dendrites growth and detrimental side reactions for Zn metal anodes in aqueous electrolytes induce short cycle life, low coulombic efficiencies, and cell failure. Here we propose to construct a MXene-porous polydopamine (MPP) interfacial layer on the Zn metal surface. The abundant functional groups in MPP can effectively trap water molecules to suppress their corrosion to Zn metal, indicating the desolvation and anticorrosion functions. Combined experimental and simulation results show that MPP layers can also lower the nucleation overpotentials and homogenize the electric field distribution and Zn ion flux, which ensure the horizontal and dendrite-free Zn metal deposition . The MPP-Zn electrodes exhibit an exceptionally long cycle life of over 1000 h (10 times that of bare Zn) and excellent high-rate capabilities in (a)symmetric cells. When the optimal Zn anodes were coupled with NH 4 V 4 O 10 cathodes, the Zn metal full cells presented a remarkable capacity of 368 mAh g −1 and negligible capacity degradations after 300 cycles, which rivals the state-of-the-art performance in literature. The multifunction-in-one concept in this work would spur the development of practical Zn metal batteries.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Ziqi Ren,Qixiang Zhang,Jianyu Yin,Mingfang Deng,Xubin Zhou,Qianqian Yao,Songzhan Li,Yihua Gao,Nishuang Liu
The potential of reverse electrodialysis for harvesting osmotic energy is severely limited by ion concentration polarization (ICP), a phenomenon that restricts power output and confines the technology to the laboratory scale (< 0.4 µW). This challenge is overcome with an ionic liquid confined porous MXene (IPM) system that integrates strategies across two scales. At the microscopic level, sub-nanometer channels are engineered using porous MXene and confined ionic liquids to reduce mass transfer resistance and optimize ion transport. Concurrently, at the macroscopic level, a micropore array design spatially decouples the diffusion interfaces to effectively suppress the ICP effect. This dual-scale approach increases power density by 53.6% and achieves a maximum output power of 3.47 µW, which is nearly ten times higher than that of similar work. The work demonstrates a robust pathway for overcoming critical power limitations, advancing osmotic energy conversion toward industrial renewable energy applications.
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高影响因子
Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-18
·
IF 23.655
Cao Wentao,Wang Zheng,Liu Xiaohao,Zhou Zhi,Zhang Yue,He Shisheng,Cui Daxiang,Chen Feng
A bioinspired MXene-based user-interactive electronic skin (e-skin) for digital and visual dual-signal sensing was designed and fabricated.
The MXene-based e-skin exhibited an excellent electromechanical sensing performance and realized the real-time monitoring of human activities, such as handwriting, drinking, walking, and speaking.
Benefiting from the outstanding Joule-heating performance of MXene-based film, the e-skin with thermochromic pigments could realize a wider range and dynamic coloration for passive displays and visual recognition of various human motions.
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Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 6
·429
·
IF 21.8
Ma Shanshan,Liu Siqi,Yan Jifeng,Ren Bin,Yu Hang,Ma Zhaoyang,Sun Lina,Zhang Tengyang,Huo Jinpeng,Yang Yuhui,Fei Jie,Chae Sanghoon,He Chaobin,Li Hejun
The development of a multifunctional conductive film to meet the requirements of flexibility, high-strength and exceptional electromagnetic interference (EMI) shielding capacity in the electronic devices has attracted extensive attention. A strategy of hydrogel-induced ultra-fast protonation was proposed for preparing aramid nanofibers-transition metal carbonitrides-poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (ANF-MXene-PEDOT:PSS) conductive films. The ultra-fast protonation process would induce the formation of ultra-long molecular chains and the reconstruction of cross-linking networks to enhance the mechanical properties of films. The ultimate tensile strength of ANF-MXene-PEDOT:PSS (60%) film reached 233.6 MPa, showing an increase of 189.5%. Meanwhile, the encapsulation of conductive PEDOT:PSS layer effectively addressed the issues of the brittleness and highly oxidization susceptibility of MXene. The EMI shielding effectiveness of ANF-MXene-PEDOT:PSS (60%) film reached 45.7–48.2 dB from 8.2 to 26.7 GHz at a thickness of 36 μm. After a month for exposing to air, the EMI shielding capability of ANF-MXene-PEDOT:PSS (60%) film still remained stable (> 42.5 dB). This hybrid film also exhibited high conductivity (264.7 S·cm −1 ), self-cleaning, fire retardancy and joule heating properties, which was as an intelligent sensor to realize the real-time monitoring of human physiological signals. This work paves the way for large-scale production of next-generation high-performance EMI shielding films, demonstrating huge potential in electromagnetic protection, thermal management and intelligent wearable devices. Graphical
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tong Zhou,Shuai Ma,Lixin Wang,Shen Xu,Yishu Huo,Yuting Feng,Yaru Zhang,Jinming Ma,Tifeng Jiao
Covalent organic frameworks (COFs) are emerging porous crystal materials with adjustable composition, structure and function, which provides a tunable platform for photocatalysis. There are still challenges in improving the photochemical properties of COFs. Therefore, we choose to design and prepare β-ketoenamine-linked COFs with high stability and covalently connect them with MXene based on Schiff base reaction. The ordered structure, visible light absorption and band gap of MXene/COF composites are optimized by different ratios of composites. The results show that MXene 0.5 /TAPB-Tp-COF has the best performance, with a specific surface area of 460.88 m 2 /g and a hydrogen production rate of 3360 μmol·g −1 ·h −1 , which is 26.67 times that of pure TAPB-Tp-COF. The MXene/TAPB-Tp-COF heterostructure engineering effectively retains the inherent microporous architecture and high surface area of pristine COFs, while introducing interfacial charge transfer channels that boost photogenerated carrier separation efficiency and accelerate charge migration kinetics. This covalent composite method has promoted the research and development of COFs-based photocatalysts. This covalent composite method is beneficial to the research and development of COFs-based photocatalysts.
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高影响因子
Nature Photonics
·
2023
·Vol. 17
·期 7
·622-628
·
IF 35
Zhao Tao,Xie Peiyao,Wan Hujie,Ding Tianpeng,Liu Mengqi,Xie Jinlin,Li Enen,Chen Xuequan,Wang Tianwu,Zhang Qing,Wei Yanyu,Gong Yubin,Wen Qiye,Hu Min,Qiu Cheng-Wei,Xiao Xu
Broadband and efficient terahertz absorbing films are crucial to high-performance terahertz detectors, which are in demand for next-generation wireless communications, astronomy, security screening, medical imaging and so on. Recent studies reported a series of two-dimensional materials for enhanced light absorption in terahertz waves, such as graphene, transition metal dichalcogenides and topological insulators, among others. However, it is still challenging to achieve the intrinsic thin-film absorption limit (50%) across the whole ultrabroad terahertz band. Here we demonstrate that ultrathin 10.2-nm-thick (~ λ /30,000) Ti 3 C 2 T x MXene assemblies can reach the intrinsic thin-film absorption limit across the entire 0.5–10 THz band. Such intriguing phenomena are attributed to the highly concentrated free electrons (~10 21 cm −3 ), short relaxation time (~10 fs) and unique intra- and interflake (hopping) electron transport properties in Ti 3 C 2 T x MXenes. Our results are validated by alternating current impedance theory using the Drude–Smith model, rather than classic direct current impedance matching. We believe that our findings will stimulate more studies of broadband terahertz technologies with MXenes and beyond, providing a route to developing compact, supercontinuum terahertz optoelectronic or photothermoelectric devices.
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高影响因子
JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 3.6
Xiaoyang Jia,Ke He,Xingyu Liu,Zhuoran Yang,Rui Huang,Yangling Liu,Jun Lin,Xin Liu,Jian Wang,Shaojian He
For the proton exchange membrane (PEM) applying in vanadium flow battery (VFB), it is difficult to separate the electrolyte ions at two electrodes while conducting protons. In this work, a novel composite membrane is developed, organically modified-MXene (MDP) filled sulfonated poly(ether ether ketone) (SPEEK) membrane, where MDP is prepared through co-coating the polydopamine (PDA) and polyethyleneimine (PEI) on the surface of MXene. The two-dimensional structure of MXene can effectively reduce the vanadium ions permeation, while the surface functional groups from the coating layer can assist in proton transport, thus enhancing the membrane selectivity. The membrane with only 1.0 wt% MDP (SPEEK/MDP-1) achieves maximum selectivity of 7.1 × 10 7 S min cm −3 . Furthermore, the energy efficiency (EE) of the VFB loaded with SPEEK/MDP-1 reaches ~92.5% at 40 mA cm −2 current density. This work provides a new direction for enhancing the properties of PEM used in VFB applications. Graphical Enhanced EE of VFB by highly selective PEM.
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高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Runlin Han,Yongli Xie
In this work, TiO 2 /MXene nanocomposites have been explored with hydrothermal synthesis during the dye photocatalytic degradation process. They worked as photocatalyst with high efficiency. The degradation of organic dye methyl orange with MXene under ultraviolet (UV) light and visible light was studied in detail. The methyl orange can be degraded efficiently especially at acid condition. When the nanocomposites/dye ratio was fixed at 5, most of the dye (close to 99.9%) was degraded under UV and visible light irradiation in 3 h. When MXene was recycled to treat methyl orange, the degradation rate was kept at 96% after 2 cycles under UV light. It was found that the composite material showed improved photocatalytic performance under long time ultraviolet treatment. Scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy characterizations of Ti 3 AlC 2 and MXene were carried to investigate the possible reasons for high degradation efficiency. MXene worked as a cocatalyst which enhanced the separation of electron hole pairs and catalytic performance.
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ACS Nano
·
2020
·
IF 14.588
Zehui Lin,Ji Liu,Wei Peng,Yunyi Zhu,Yang Zhao,Kang Jiang,Ming Peng,Yongwen Tan
Terahertz technology promises broad applications, which calls for terahertz electromagnetic interference (EMI) shielding materials to alleviate radiation pollution. 2D transition metal carbides and/or nitrides (MXenes) with metallic conductivity are promising for EMI shielding, but simultaneously realizing light weight, high stability, and foldability in a MXene shielding material to meet the requirements of increasingly popular portable and wearable equipment has remained a great challenge. Herein, an ion-diffusion-induced gelation method is demonstrated to synthesize free-standing, light-weight, foldable, and highly stable MXene foams, in which MXene sheets are cross-linked by multivalent metal ions and graphene oxide to form an oriented porous structure. The method is highly efficient, controllable, and versatile for scalable generation of functional 3D MXene structures with arbitrary shapes and synergistic properties. The distinctive cross-linked porous structure endows the light-weight MXene foam with good foldability, outstanding durability and stability in wet environments, and an excellent terahertz shielding effectiveness of 51 dB at a small thickness of 85 μm. This work not only provides an insight for the on-target design of high-performance terahertz shielding materials but also expands the applications of MXenes in 3D macroscopic form.
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SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Yongcheng He,Jingyi Liu,Han Chen,Yutong Yuan,Yuanliang Huang,Jun Jiang,Weichao Li,Liang Lin,Hongyan Yuan,Longhao Zou,Jian Jiao
Low-voltage operation below 500 V enabled by synergistic material-structural design. • Integrated MXene/PDMS composite achieves high dielectric constant, and folded multilayer structure for amplifies deformation. • The haptic actuator delivers 102 μm displacement and 103 mN force without pre-stretching. • Haptic array enables precise tactile pattern generation with 97.71% Braille recognition accuracy. • Wearable, flexible design with wireless control enables immersive VR texture simulation. Haptic feedback is crucial for immersive virtual and augmented reality, relying on soft actuators for natural and comfortable human-machine interaction. Dielectric elastomer actuators are promising for haptic feedback applications, owing to their advantageous properties including lightness, flexibility, and high power density. However, their low dielectric constant frequently necessitates the application of high operating voltages, thus making them prone to dielectric breakdown. Here, we propose a Ti₃C₂Tₓ MXene-based multilayer-folded dielectric elastomer haptic actuator operating at a low voltage enabled by an integrated materials and device design strategy. The haptic actuators feature a dielectric film with a high dielectric constant (above 6.39 at 1 kHz) achieved by incorporating Ti₃C₂Tₓ MXene into polydimethylsiloxane (PDMS), combined with a uniquely folded multilayer structure that accumulates deformation. The haptic actuator can deliver an out-of-plane displacement of 102 μm and a force of 103 mN without pre-stretching. A haptic display interface incorporating these actuators enables independent actuation that operates at a low voltage below 500 V. It supports various tactile patterns, such as Braille and texture simulation in virtual reality, offering a viable pathway toward immersive human-machine interactions. Download: Download high-res image (248KB) Download: Download full-size image
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Fangli Yang,Xu Zhao,Ken Aldren S. Usman,Degang Jiang,Joselito M. Razal,Jianhua Wang,Jinlong Tao,Jizhen Zhang
Ti 3 C 2 T x MXene fiber has excellent electrical conductivity and energy storage properties, making it ideal for manufacturing fiber-shaped supercapacitors (FSCs). However, optimizing the MXene fiber electrode structure to improve mechanical properties and maintain maximum energy storage performance remains a critical challenge. This report presents a coaxial structure of MXene@carbon nanotube (CNT) fiber and realizes the regulation of fiber properties. Compared with MXene/CNT hybrid fibers with the same ratio, MXene@CNT coaxial fibers offer a higher electrical conductivity (4553.93 ± 108.15 S cm −1 ) and mechanical strength (tensile strength of 147.51 ± 13.02 MPa). This can be attributed to the good force transfer and intact of conductive channels in the continuous phase in MXene and CNT layers. Notably, the CNT sheath has negligible effect on the diffusion of electrolyte and the coaxial fiber demonstrates a higher specific capacitance of up to 1268 F cm −3 at high current density of 1 A cm −3 , along with excellent rate performance and long-cycle stability. When assembled into supercapacitors, the MXene@CNT coaxial fiber achieves a high energy density of ∼11.61 Wh kg −1 and a power density of ∼6007.14 W kg −1 . This study provides insight into structural engineering for the large-scale preparation of high-performance MXene-based composite fibers.
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