SOFT MATERIALS
·
2022
·
IF 1.619
Yan Bai,Shuaihang Bi,Weikang Wang,Ning Ding,Yuyuan Lu,Mengyue Jiang,Chengbo Ding,Weiwei Zhao,Ning Liu,Jing Bian,Shujuan Liu,Qiang Zhao
With the booming growth of flexible human-computer interactions and telecommunications, it is desirable to fabricate a high-sensitivity strain sensor to monitor human movement and develop an electromagnetic interference (EMI) shielding materials to protect modern microelectronics and humans from electromagnetic damage. Herein, the biocompatible, stretchable, and compressible cellulose/MXene hydrogel has been prepared to first realize the dual-functional applications in strain sensor and EMI shielding. Two-dimensional MXene nanosheets serve as conductive sensing materials and fillers to construct conductive networks. The hydrogen bond interaction between them enhances the mechanical property of hydrogel. Benefiting from the excellent electrical conductivity and good mechanical property of the cellulose/MXene hydrogel, the resultant strain sensor displays excellent tensile strain (~144.4%), high sensitivity (gauge factor ~ -6.97), adjustable detection range (0-68.7%), fast response time (~100 ms), and great stability (~1000 cycles). It can monitor human motion, including pulse beating, speech recognition, writing sensing and pressure distribution induction of 4 × 4 sensor array platform. Moreover, the cellulose/MXene hydrogel presents an absorption-predominant EMI shielding performance in the frequency of X-band. This work provides a new inspiration for the development of multifunctional hydrogel in artificial intelligence, human-computer interaction, and EMI shielding technique.
研究领域:
材料科学
·
电子工程
·
人机交互
·
人工智能
·
电磁屏蔽
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 4
·2597-2609
·
IF 4.682
Zhai Wangyi,Cao Yuanming,Li Yifei,Zheng Min,Wang Zuoshan
The exploration of novel and multifunctional coatings through composite nanomaterials design is crucial for developing next-generation polyester fabrics. Herein, we report an efficient approach of self-assembling MoO 3– x QDs on MXene (Ti 3 C 2 T x ) to fabricate multifunctional polyester fabrics. In a typical preparation, MoO 3– x QDs with an average size of 5 nm were uniformly distributed on the surface of MXene nanoflakes upon UV light. Then, polyester fabrics were coated with MoO 3– x QDs/MXene by dipping. The results demonstrated that the coated fabric had a decreasing trend in the electrostatic half-period from more than 60 s (untreated fabric) to 0.15 s and had excellent washing fastness. In addition, a similar phenomenon was found in smoke suppression, with the coated fabric producing 36.16% less smoke. More importantly, the sterilization rate of the coated fabric had reached 99% to E. coli and S. aureus under sunlight owing to the strong response of MoO 3– x QDs/MXene. This work provides a novel and facile strategy to design multifunctional coatings.
研究领域:
材料科学
·
纺织工程
·
纳米技术
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DOI
高影响因子
Gels
·
2025
·Vol. 11
·期 12
·1000
·
IF 5.3
Haiyan Zhao,Ziqi Wang,Chaohao Yin,Chu Chen,Li Wang,Xin Zhang,Zhuo Wang
In this work, a flexible, stretchable, tough, highly ionic conductive, and anti-freezing hydrogel based on acrylamide/two-dimensional transition metal carbide (MXene)/montmorillonite (MMT) was precisely designed. In the hydrogel, MXene and MMT acted as both cross-linking agents and conductive fillers, delivering high stretchability (1037%) with a strength of up to approximately 67 kPa and high conductivity. As a result, the usual trade-off between conductivity and mechanical properties of hydrogels could be alleviated to some extent. Therefore, the hydrogel could be used as an electrolyte for supercapacitors (SCs) and strain sensors to monitor physical signals. The hydrogel-based SC exhibited outstanding electrochemical performance over a wide temperature range. Moreover, it could easily withstand various deformations, such as bending, twisting, and compression. The hydrogel also exhibited excellent sensing properties, with a short tensile response time and a high-sensitivity factor (GF = 14.8) in the 0–400% range (0 denotes the original state, where both the strain and stretch are zero as there is no deformation at this point). Due to its high conductivity, the prepared hydrogel could be used as a flexible electrode to replace commercial electrodes and record electromyographic (EMG) signals. This work proposes a novel approach for balancing the conductivity and mechanical strength of hydrogels.
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Yiming Chen,Wenquan Gu,Li Tan,Zhimin Ao,Taicheng An,Shaobin Wang
Photocatalytic H 2 O 2 production by O 2 reduction is an environmental-friendly process for solar light conversion to chemical energy. In this work, Ti 3 C 2 MXene was used as a non-noble metal cocatalyst to load on P25 as Ti 3 C 2 /TiO 2 (TC/TO) photocatalysts for photocatalytic H 2 O 2 synthesis. A H 2 O 2 formation rate (179.7 μmol L −1 h −1 ) of the optimized 10 %-TC/TO composite was obtained to be over 21 folds as high as that of P25 under UV light. Radical quenching experiments and superoxide radical detection confirmed the superoxide radical as the primary intermediate, suggesting the O 2 reduction in two-step single-electron indirect reaction. The higher activity of TC/TO can be attributed to the functions of Ti 3 C 2 MXene in accelerating the separation and transfer of photogenerated electron-hole pairs, suppressing their recombination, and blocking the surface Ti OOH formation. This work proves the promising roles of Ti 3 C 2 MXene in the photocatalytic reaction and further expands their new applications in photocatalysis .
研究领域:
材料科学
·
环境化学
·
光化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zhiming Deng,Pingping Tang,Xinyu Wu,Hao-Bin Zhang,Zhong-Zhen Yu
Although hydrophilic and electrically conductive transition-metal carbon/nitride (MXenes) nanosheets hold great promise for electrically conductive and electromagnetic interference (EMI) shielding applications, the weak interaction among MXene nanosheets makes them difficult to form compressible three-dimensional architectures with high conductivity. Herein, inspired by the plant “Parthenocissus tricuspidata”, an efficient approach is demonstrated to fabricate conductive and lightweight Ti3C2Tx MXene/acidified carbon nanotube anisotropic aerogels (MCAs) with superelasticity and high thermal insulation. The MXene nanosheets construct the anisotropic and porous skeleton, while the acidified carbon nanotubes reinforce the pore walls of MXene nanosheets, making the MCAs superelastic and compressible. The superelastic MCA with only 5 wt % of the acidified carbon nanotubes is structurally stable during cyclic compressions at both high and ultralow temperatures. Its high conductivity (447.2 S m–1) and ultralow density (9.1 mg cm–3) endow its paraffin composite with a high EMI shielding efficiency of ∼51 dB at an ultralow filler content of 0.3 vol %. When the density of MCA increases to 18.2 mg cm–3, its EMI shielding effectiveness reaches 90 dB. Additionally, the porous and ultralight MCAs exhibit better thermal insulation performances as compared to commercial melamine and polystyrene foams. Therefore, the superelastic, electrically conductive, lightweight, and thermally insulating MCAs would be promising for EMI shielding applications in space equipment and portable wearable devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zhihao Shi,Bingjue Wang,Ziwei Zhang,Han Chen,Yujie Shi,Yulei Sui,Ling Wu
Transition metal carbides/nitrides (MXene) emerge as promising enhancers for high-capacity metal sulfide anodes, owing to exceptional electrical conductivity, mechanical robustness and adaptable surface chemistry. Here, MXene/SnS 2 heterostructures with a honeycomb architecture are fabricated by a mild liquid-phase deposition method. Density functional theory calculations reveal that the negatively charged MXene terminal groups govern the Sn 4+ cation adsorption, thereby promoting nucleation. By optimizing component dispersion and interfacial bonding, the composite effectively combines the high capacity of SnS 2 with the conductive MXene framework, achieving initial discharge capacities of 1547.0 and 555.3 mAh g −1 at the current densities of 0.1 and 5 A g −1 , respectively. After 1000 cycles, it retains a capacity retention of 69.5 % at 5 A g −1 . The hierarchically structured interface enhances ion transport and pseudocapacitive effects, enabling fast rate performance. The approach provides an idea for designing fast-charging anodes with high energy density.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Changfeng Li,Ge Wang,Mengyue Peng,Chenwei Liu,Tangfeng Feng,Yunfei Wang,Faxiang Qin
Reconfigurable metamaterial absorbers (MAs), consisting of tunable elements or deformable structures, are able to transform their absorbing bandwidth and amplitude in response to environmental changes. Among the options for building reconfigurable MAs, origami/kirigami structures show great potential because of their ability to combine excellent mechanical and electromagnetic (EM) properties. However, neither the trial-and-error-based design method nor the complex fabrication process can meet the requirement of developing high-performance MAs. Accordingly, this work introduces a deep-learning-based algorithm to realize the fast inverse design of origami MAs. Then, an accordion-origami coding MA is generated with reconfigurable EM responses that can be smoothly transformed between ultrabroadband absorption (5.5–20 GHz, folding angle α = 82°) and high reflection (2–20 GHz, RL > −1.5 dB, α = 0°) under y-polarized waves. However, the asymmetric coding pattern and accordion-origami deformation lead to typical polarization-sensitive absorbing performance (2–20 GHz, RL > −4 dB, α < 90°) under x-polarized waves. For the first time, a kirigami polarization rotation surface with switchable operation band is adapted to balance the absorbing performance of accordion-origami MA under orthogonal polarized waves. As a result, the stacked origami-kirigami MA maintains polarization-insensitive ultrabroadband absorption (4.4–20 GHz) at β = 0° and could be transformed into a narrowband absorber through deformation. Besides, the adapted origami/kirigami structures possess excellent mechanical properties such as low relative density, negative Poisson’s ratio, and tunable specific energy absorption. Moreover, by modulating the PEDOT:PSS conductive bridges among MXene nanosheets, a series of low-concentration MXene-PEDOT:PSS inks (∼46 mg·mL–1) with adjustable square resistance (5–32.5 Ω/sq) are developed to fabricate the metamaterials via screen printing. Owing to the universal design scheme, this work supplies a promising paradigm for developing low-cost and high-performance reconfigurable EM absorbers.
研究领域:
电磁学
·
材料科学
·
人工智能设计
·
柔性电子器件
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Chao Peng,Ping Wei,Xin Chen,Yongli Zhang,Feng Zhu,Yonghai Cao,Hongjuan Wang,Hao Yu,Feng Peng
2D MXenes have attracted extensive attentions owing to their anisotropy, high conductivity and other extraordinary properties. The popular preparation method of MXenes usually involves HF in high concentrations, which has seriously restricted their pervasive applications. In this work, a new hydrothermal route with low-toxicity etching agents (NaBF 4 , HCl) was used to synthesize Ti 3 C 2 MXene ( h- Ti 3 C 2 ). Compared with the Ti 3 C 2 prepared by the traditional HF etching method ( t- Ti 3 C 2 ), the h- Ti 3 C 2 has the higher c lattice parameter , larger interlayer distance and larger BET specific surface area, because of the slow release mechanism during the hydrothermal process. The hydrothermal etching method not only avoided the use of high-concentration HF, but also was more efficient to prepare Ti 3 C 2 flakes. Moreover, the hydrothermal etching route can be extended to other MXene materials, e.g. Nb 2 C. We demonstrated that the h -MXenes have better adsorption performance of methylene blue and methyl orange dyes. The hydrothermal etching route proposed in this study enabled the environmental benign and high efficiency exfoliation of MXenes, displaying the promise to facilely prepare 2D MXenes and paving a way to their widespread applications.
研究领域:
材料科学
·
纳米材料
·
环境功能材料
·
表面化学
·
胶体与界面科学
✓ 已验证
DOI
高影响因子
CARBON
·
2022
·
IF 11.307
Chenyang Jiao,Zhiming Deng,Peng Min,Jingjing Lai,Qingqiang Gou,Rong Gao,Zhong-Zhen Yu,Hao-Bin Zhang
MXene-based electromagnetic interference (EMI) shielding nanocomposites are promising candidates to ensure the stable operation of flexible and wearable electronic devices. However, it remains a considerable challenge to develop high-performance flexible polymer/MXene composites with excellent broadband EMI shielding efficiency and healing capability. Herein, we select waterborne polyurethane (WPU) and natural rubber (NR) as the polymer matrices to fabricate flexible and healable WPU/NR/MXene composite films by forming continuous honeycomb-like conductive network using the electrostatic repulsion interaction and vacuum-assisted filtration strategy. Consequently, the WPU/NR/MXene composite films of 339 μm thick achieve an average EMI shielding performance exceeding 76.1 dB in the wide frequency range of 8.2–40.0 GHz when the MXene content is only 5.48 vol%. Compared to the WPU/NR film, the composite films show 10.3 and 8.8 times increments in tensile strength and toughness, respectively. Furthermore, the composite films can elevate their surface temperature to >114 °C under 200 mW cm −2 near-infrared light irradiation within 3 min, which can activate the PU chain segments and the hydrogen bonds between MXene and WPU to afford an interesting healable capability. Therefore, the multifunctional composite film with rapid photothermal healing property can ultimately keep its mechanical and shielding performances, and greatly extend its practical application areas.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yongbin Wang,Ningjun Chen,Yan Liu,Xuefeng Zhou,Ben Pu,Yue Qing,Mingzhe Zhang,Xinglin Jiang,Junfeng Huang,Qi Tang,Bin Zhou,Weiqing Yang
MXene with excellent flexibility, metallic conductivity, and ultra-high capacitance, makes a promising electrode for flexible supercapacitor . But the serious restacking phenomenon between MXene layers undesirably limits the ion transport kinetics and substantially reduces ion storage sites, badly restricting the rate capability and storage capacity of supercapacitor. Here, we constructed a free-standing, flexible, structurally 3D-interconnected and hydronium ion penetrable MXene/Graphdiyne nanotube (MG) composite film by employing graphdiyne nanotubes (GDY-NTs) with inherent in-plane pores for horizontal-vertical intercalation among MXene layers. Benefiting from the above synergistic effect, this composite film presents a greatly-improved capacitance of 337.4 F g −1 (337.4 C g −1 ) and an obviously-enhanced rate capability of 73 %-remaining at 100 mV s −1 , which is much better than those of the pure Ti 3 C 2 T x films (230.8 F g −1 , 55 %-remaining). Based on it, we developed an asymmetric solid-state flexible supercapacitor with a high energy density of 19.7 Wh kg −1 at the power density of 750 W kg −1 and a capacitance retention of 88.2 % after 10 000 cycles at 8 A g −1 . Evidently, this work provides a new route to solve the restacking issue of MXene for high-performance flexible supercapacitor.
研究领域:
材料科学
·
纳米科技
·
电化学
·
能源存储
·
柔性电子学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Li Gou,Weifeng Jing,Ying Li,Mei Wang,Shengliang Hu,Huiqi Wang,Yan-Bing He
Silicon (Si) has been ascertained as one of the most desirable anode candidates for sodium-ion batteries (SIBs), ascribed to its sizeable theoretical capacity and abundant resource. However, the inherent electrochemical inertness of crystalline Si against sodium impedes its practical use. Herein, lattice-coupled Si nanoparticles are uniformly distributed onto delaminated MXene (d-MXene) and further tightly confined by hard carbon (HC), consequently forming a 3D cross-linked (Si/d-MXene)@HC architecture as an anode material for SIBs. Coupling a carbon-coated Si anode with a conductive d-MXene matrix through the local lattice overlapping not only vastly enables the alloying reactivity of Si with Na, but also provides fast-transfer portholes for Na+ and electrons because of the capacitive-like behavior of d-MXene, thus increasing the capacity and achieving fast ion conduction. The Si/d-MXene bonded with HC, constructing a robust architecture, can effectively stabilize the whole electrode structure and accommodate the volume expansion of Si upon cycling and increase capacitive-like contributions, resulting in an enhanced capacity and excellent cycle performance as anodes for SIBs. The developed electrode thus harvests favorable electrochemical performance compared to pure Si and d-MXene electrodes, such as high initial discharge capacity (370 mAh g–1), long cycling stability (a capacity retention above 80% after 500 cycles), and superior rate performance. The protocol to enable the sodium storage performance of Si/MXene anodes by adopting the capacitive-battery dual model would inspire rather far-ranging investigations on other advanced battery systems.
研究领域:
材料科学
·
电化学
·
纳米能源
·
储能技术
·
无机非金属材料
·
先进电池系统
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2021
·Vol. 13
·期 1
·1-15
·
IF 16.419
Wu Xinyu,Tu Tingxiang,Dai Yang,Tang Pingping,Zhang Yu,Deng Zhiming,Li Lulu,Zhang Hao-Bin,Yu Zhong-Zhen
Highlights
3D printing of MXene frames with tunable electromagnetic interference shielding efficiency is demonstrated.
Highly conductive MXene frames are reinforced by cross-linking with aluminum ions.
Electromagnetic wave is visualized by electromagnetic-thermochromic MXene patterns.
Abstract The highly integrated and miniaturized next-generation electronic products call for high-performance electromagnetic interference (EMI) shielding materials to assure the normal operation of their closely assembled components. However, the most current techniques are not adequate for the fabrication of shielding materials with programmable structure and controllable shielding efficiency. Herein, we demonstrate the direct ink writing of robust and highly conductive Ti 3 C 2 T x MXene frames with customizable structures by using MXene/AlOOH inks for tunable EMI shielding and electromagnetic wave-induced thermochromism applications. The as-printed frames are reinforced by immersing in AlCl 3 /HCl solution to remove the electrically insulating AlOOH nanoparticles, as well as cross-link the MXene sheets and fuse the filament interfaces with aluminum ions. After freeze-drying, the resultant robust and porous MXene frames exhibit tunable EMI shielding efficiencies in the range of 25–80 dB with the highest electrical conductivity of 5323 S m −1 . Furthermore, an electromagnetic wave-induced thermochromic MXene pattern is assembled by coating and curing with thermochromic polydimethylsiloxane on a printed MXene pattern, and its color can be changed from blue to red under the high-intensity electromagnetic irradiation. This work demonstrates a direct ink printing of customizable EMI frames and patterns for tuning EMI shielding efficiency and visualizing electromagnetic waves.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
PubMed
高影响因子
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