JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yamin Feng,Weifeng Liu,Haineng Bai,Yan Zhang,Yunxiao Du,Yongqiang Liu,Long Zhang
Aqueous zinc-ion hybrid micro-supercapacitors (AZIHMSCs) with high power density, moderate energy density, good cycle life and excellent safety are promising candidates for micro-energy storage. Among them, AZIHMSCs based on Ti 3 C 2 T x MXene anodes and battery-type cathodes can provide superior performance. However, two-dimensional (2D) Ti 3 C 2 T x MXene electrodes have an inherent restacking issue and –F surface terminations that hinder ion diffusion and ultimately reduce the energy storage capacity of the corresponding AZIHMSCs. Herein, a deep alkalisation strategy was developed to synthesise oxygen-rich, functionalised MXene (O-MXene) nanofibres to solve these problems. Compared with the traditional 2D few-layered Ti 3 C 2 T x MXene electrode, O-MXene electrodes exhibit an interconnected, three-dimensional (3D) microstructure and ample oxygen functional groups, enhancing Zn 2+ affinity and improving capacitance and rate performance. First-principles calculations further reveal the enhanced interactions between O-MXene electrodes and Zn 2+ supported by atomic interaction, electronic behaviour and orbital hybridization. The AZIHMSCs fabricated with an O-MXene film anode and a MnO 2 -multiwalled carbon nanotubes (MnO 2 -MWCNTs) film cathode exhibit excellent energy density (130.6 μWh cm −2 ), power density (9.5 mW cm −2 ), cycling stability (93.29 % after 5000 cycles) and flexibility (98.43 % capacitance retained at 120° bending). This study will open new avenues for modifying MXene materials and next-generation high-performance AZIHMSCs.
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Jiucong Liu,Mengdi Zhang,Di Zhang,Xizheng Liu
Lithium-ion batteries (LIBs) suffered from severe performance fading when operated at lower temperatures due to the increase of Li desolvation energy and the formation of Li dendrites on the anode surface. It is critically important to develop a suitable anode with higher capacity retention at lower temperatures for advanced LIBs. Herein, we report the fabrication of a composite anode by confining room-temperature liquid GaInSn alloys within a porous 2D-layered V2CTx MXene. This configuration combines the high capacity of liquid metal (LM) and high ionic conductivity of 2D V2CTx by confining self-healing LM within the V2CTx framework, resulting in enhanced long-term cycle performance (1174.6 mA h g–1 after 200 cycles at 200 mA g–1) and low-temperature performance (529.6 mA h g–1 after 100 cycles at −20 °C). Theoretical calculations disclose that the strong adsorption of V2CTx to LM ensures the stability of the composites. It also reveals that LM with a lower adsorption energy promotes the transportation of Li+. The LM nanodroplets buffer the volume change of V2CTx during charging/discharging and avoid electrode crushing. The expanded layers of V2CTx and the porous structure facilitate the Li-ion desolvation and transportation at lower temperatures, thus suppressing the performance fading. This work paves the way for the development of composite anodes for LIBs with high specific capacity toward low-temperature applications.
✓ 已验证
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Yu Wu,Danjiao Zhao,Jidi Zhang,Aiping Lin,Yu Wang,Lei Cao,Shufen Wang,Shixian Xiong,Feng Gu
Additive manufacturing techniques have revolutionized the field of fabricating micro-supercapacitors (MSCs) with a high degree of pattern and geometry flexibility. However, traditional additive manufacturing processes are based on the functionality of microstructural modulation, which is essential for device performance. Herein, Ti3C2Tx MXene was chosen to report a convenient aerosol jet printing (AJP) process for the in situ curling and alignment of MXene nanosheets. The aerosol droplet provides a microscale regime for curling MXene monolayers while their alignment is performed by the as-generated directional stress derived from the quasi-conical fiber array (CFA)-guided parallel droplet flow. Interdigital microelectrodes were further developed with the curled MXene and a satisfying areal capacitance performance has been demonstrated. Importantly, the AJP technique holds promise for revolutionizing additive manufacturing techniques for fabricating future smart microelectronics and devices not only in the microscale but also in the nanoscale.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Zhen Wang,Zhi Cheng,Li Xie,Xianliang Hou,Changqing Fang
Ti 3 C 2 T x MXene has been explored as an efficient electromagnetic interference (EMI) shielding material because of its high electrical conductivity , large specific surface area, rich surface defects , and abundant functional groups. Herein, core-shell Fe 3 O 4 @PANI composites were prepared, followed by the preparation of a flexible and lightweight Ti 3 C 2 T x /Fe 3 O 4 @PANI composite film with sandwich intercalation structure by vacuum-assisted filtration, using Ti 3 C 2 T x MXene as a matrix material. The ultrathin composite film with a Ti 3 C 2 T x nanosheets to Fe 3 O 4 @PANI weight ratio of 12:5 reached a maximum EMI shielding effectiveness (SE) value of 58.8 dB at a thickness of only 12.1 μm. This is much higher than the SE of pure conductive Ti 3 C 2 T x films of the same thickness. After adjusting the film thickness by increasing the concentration of Ti 3 C 2 T x , an SE of 62 dB was achieved at a thickness of 16.7 μm. The ultrathin Ti 3 C 2 T x /Fe 3 O 4 @PANI films exhibit potential for application in packaging, wearable electronic equipment, and military fields. Moreover, they provide insight into the preparation of lightweight and progressive electromagnetic shielding materials.
✓ 已验证
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.
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 12
·1-10
·
IF 6.408
Shi Yanmei,Hu Kai,Mei Lin,Yang Xueming,Shi Yange,Wu Xiangxiang,Li Xiu-min,Miao Mingsan,Zhang Sisen
A novel SnO 2 quantum dots (SnO 2 QDs)-functionalized Ti 3 C 2 MXene nanocomposite was prepared via in situ synthesis method, resulting in well-regulated the nucleation and growth of SnO 2 QDs to evenly distribute onto MXene nanosheets. Ultra-small size SnO 2 QDs decorated on the surface of Ti 3 C 2 MXene nanosheets can effectively prevent the restacking of MXene and remarkably increase the electroactive surface area of the electrode, which can further increase electrocatalytic activity toward dopamine. Then, an ultrasensitive electroanalytical method based on SnO 2 QDs-functionalized Ti 3 C 2 MXene nanocomposite for dopamine monitoring was developed, and the effects of experimental condition were investigated systematically. Under optimized conditions, the prepared sensor presented a linear dependence for dopamine in the concentration range from 0.004 to 8.0 µM with the detection limit of 2.0 nM (S/N = 3). Moreover, it selectively perceived dopamine in presence of physiological interferents in urine and serum samples with excellent linearities (correlation coefficients higher than 0.9920). The relative recoveries were in the range 97.67–105.3% and 103.0–106.8%, while the limits of quantitation were 10.12 nM and 9.62 nM in urine and serum sample, respectively, demonstrating the method suitability for dopamine sensing and being envisioned as a promising candidate for neurotransmitter monitoring in biological diagnosis. Graphical Abstract
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Bin Yu,Anthony Chun Yin Yuen,Xiaodong Xu,Zhen-Cheng Zhang,Wei Yang,Hongdian Lu,Bin Fei,Guan Heng Yeoh,Pingan Song,Hao Wang
High-performance MXene-based polymer nanocomposites are highly desirable for diverse industry applications due to their exceptional mechanical, thermal and other properties. Nevertheless, it remains an intractable challenge to create flame retardant polymer/MXene nanocomposites due to the difficulty to achieve uniform dispersion of MXenes. Here, we reported a facile strategy for the surface manipulation of two-dimensional titanium carbide nanosheets (Ti 3 C 2 T x ) with 3-aminopropylheptaisobutyl-polyhedral oligomeric silsesquioxane (AP-POSS) (POSS-Ti 3 C 2 T x ) through electrostatic interactions. The POSS-Ti 3 C 2 T x is steadily dispersed in many polar solvents. Upon incorporated into polystyrene (PS), the combined effect of AP-POSS and MXene makes the resultant PS nanocomposites exhibit significantly improved thermal and thermoxidative stability, e.g. 22 °C and 39 °C increases in the temperature at 5 wt% mass loss under nitrogen and air, respectively. Meanwhile, a 39.1 % reduction in the peak heat release rate, a respective 54.4 % and 35.6 % reduction in the peak CO production rate and the peak CO 2 production rate was achieved, which are superior to those of its own and previous counterparts. This outstanding fire safety is attributed to the combination of adsorption, catalytic and barrier effects of POSS-Ti 3 C 2 T x . Hence, as-designed functionalized MXenes can be effectively applied in PS to formulate multifunctional polymer nanocomposites attractive for wide potential applications.
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
·
2022
·
IF 5.431
Zhenqiang Ye,Chao Ji,Tao Yu,Rong Sun,Xiaoliang Zeng,Bingyang Cao
Thermal interface materials (TIMs) are indispensable materials in thermal management, and Al 2 O 3 -based TIMs are most widely used in thermal managements. Surface modification is an effective method to improve Al 2 O 3 dispersion in matrix, thereby increasing the maximum filler loading. However, traditional surfactants hardly promote the interfacial heat-transfer on the premise of the same filler loading. In this work, we proposed an electrostatic self-assembly strategy to functionalize the surface of Al 2 O 3 particles with MXene sheets to enhance the interfacial heat-transfer between fillers and silicone rubber (SR). To validate the effectiveness of MXene, we compared the Al 2 O 3 -MXene-SR TIM with Al 2 O 3 -graphene-SR TIM and Al 2 O 3 -SR TIM under the same Al 2 O 3 loading in the aspects of mechanical properties and thermal properties. Though MXene could increase the viscosity and hardness, the negative influence of MXene is much weaker than that of graphene. Nevertheless, the positive impact of MXene is more significant. First, it can reinforce the mechanical strength. The experiment showed the breaking tensile strength of the Al 2 O 3 -MXene-SR TIM is 0.117 MPa, higher than that of the Al 2 O 3 -graphene-SR TIM (0.082 MPa) and the Al 2 O 3 -SR TIM (0.07 MPa). Second, the thermal conductivity of TIMs improves a lot after MXene coating. The thermal conductivity of Al 2 O 3 -MXene-SR TIM is 3.4 W·m −1 ·K −1 , with the matrix/filler mass ratio of 100:1600, which is 30% higher than that of the Al 2 O 3 -SR TIM (2.6 W·m −1 ·K −1 ) and 21% higher than that of Al 2 O 3 -Gr-SR TIM (2.8 W·m −1 ·K −1 ). Whereas the Al 2 O 3 loading keeps the same and the MXene fraction is only about 1.16 vol‰, the increment of the thermal conductivity is mostly due to the improvement of interfacial heat-transfer via MXene. The temperature cycling test and aging test implied that the Al 2 O 3 -MXene-SR TIM is thermally stable and reliable. The underlying mechanism of the interfacial heat-transfer enhancement was revealed by the analysis of phonon density of states (PDOS) via a molecular dynamics simulation. The PDOS of MXene is more compatible with Al 2 O 3 and SR than graphene, so MXene sheets play the role as a bridge between Al 2 O 3 and SR to improve the interfacial phonon transport. This work provides an effective method to reduce interfacial thermal resistance in TIMs, which could facilitate the development of thermal management materials.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 5
·3613-3628
·
IF 4.682
Guo Zijiao,Li Yue,Lu Zan,Chao Yunfeng,Liu Wei
Abstract As interest in smart textiles grows, fiber-based supercapacitors are gaining attention as promising devices for powering wearable electronics. Herein, we have demonstrated a two-step manufactured hybrid fiber with excellent energy storage properties. Anhydrous MXene (Ti 3 C 2 T x ) sheets are primarily spun in synergy with liquid crystal carbon nanotubes (CNTs) to produce a continuous fiber as a promising electrode material, which solves the problem of poor rate capability owing to the sheet re-stacking of MXene. MnO 2 @MXene/CNT fibers are subsequently prepared by electrochemical deposition with controlled time. The optimal content of MXene (10 wt%) and a perfect thickness of the MnO 2 layer (4 μm) are testified to achieve an excellent capacitance of 371.1 F cm −3 in three-electrode system, which is about 200% and 1800% higher than that of 10 wt%-MXene/CNT and CNT fiber electrode, respectively. Symmetric fiber supercapacitor is assembled by paralleling two fibers with LiCl/PVA gel electrolyte, manifesting a superior cycling stability of 86.3% after 10000 cycles. Graphical Abstract Anhydrous MXene nanosheets and CNTs are incorporated by a high yield spinning technique to prepare continuous hybrid fibers as a conductive framework for MnO2 deposition, exhibiting stable and outstanding energy storage properties in supercapacitor.
✓ 已验证
DOI
高影响因子
IONICS
·
2023
·Vol. 30
·期 3
·1457-1467
·
IF 2.8
Xu Wengang,Zhang Xiaonan,Li Junhao,Chen Xiaobo,Lan Lin,Zhang Jun,Ling Francis Chi-Chung,Ru Qiang
The scaffolded hierarchical CeVO 4 /V 2 CT x -MXene composite is harvested to boost the performance of vanadium oxides in aqueous zinc-ion batteries. Benefiting from the high electronic-ion conductivity of V 2 CT x -MXene and the multilayered structure of the composite, CeVO 4 /V 2 CT x -Mxene cathode depicts the advantages of the acceptable zinc storage and ionic reaction kinetics. Compared with pure CeVO 4 , CeVO 4 /V 2 CT x -MXene cathode shows a reversible discharge capacity of 295.0 mAh g −1 at 1 A g −1 , capacity retention of 81.6% over 3000 cycles at 5 A g −1 , and good high-rate performance of 233.5 mAh g −1 at 8 A g −1 . The quasi-solid-state batteries of CeVO 4 /V 2 CT x -MXene demonstrate well mechanical deformability and good cycling performance. This work provides a reference for solving the problem of vanadium-based materials for aqueous zinc-ion batteries.
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 7
·1747-1761
·
IF 6.569
Keding Li,Yuqing Lei,Jun Liao,Yong Zhang
MXene-supported CuO nanocomposites (MCNs) were synthesized through an ice-crystal templating method without using any chemical modifiers. Nano-sized CuO particles were uniformly and stably attached to the surface of MXene nanosheets. The catalysis of the MCNs in ammonium perchlorate (AP) decomposition was studied and the results indicated that the MCNs as catalysts (2 wt%) could significantly decrease the high temperature decomposition (HTD) temperature of AP from 425.0 °C (pure AP) to 324.9 °C (AP with MCNs-3) and increase the exothermic heat from 295.2 J g−1 (pure AP) to 1272.9 J g−1 (AP with MCNs-3). With the increase of the mass ratio, the decomposition temperature decreased at first and then increased. When the ratio of MCNs-3 was 4 wt%, the HTD temperature of AP was reduced by as much as 114.4 °C and the exothermic heat was remarkably increased to 1360.6 J g−1. The high catalytic activity of MCNs-3 for AP thermal decomposition might be owing to the synergistic effect between MXene nanosheets and CuO nanoparticles. In other words, the results proved that the MXene in combination with CuO could be an effective way to enhance the catalytic performance of CuO in AP decomposition, which has potential application value in AP-based composite solid propellants.
✓ 已验证
DOI
高影响因子
CARBON
·
2021
·
IF 9.594
Ruosong Li,Qiang Gao,Hongna Xing,Yangzhe Su,Hongming Zhang,Dan Zeng,Bingbing Fan,Biao Zhao
Polymer composites receive attentions for protecting from electromagnetic (EM) pollution. However, their EM wave (EMW) attenuation mechanism primarily results from reflection rather than absorption. Herein, we prepared poly(vinylidene fluoride)/cobalt (Co)/MXene composite foams that exhibited applicable impedance matching, enhanced EMW absorption and high-performance thermal conduction properties. With CO 2 -assisted foaming, a uniform foam structure was integrated into the polymer composites, and meanwhile, the introduced MXenes were partially oxidized and transformed into TiO 2 and amorphous carbon . The formed TiO 2 not only provided extra heterogeneous interfaces and capacitor-like structures in favor of dielectric polarization but also reduced the excessive electrical conductivity of the pristine MXenes to favor impedance matching. Accordingly, the EMW absorbing performance of the composite foam was enhanced with a minimum reflection loss of −45.6 dB at 4 mm when the filler content was only 12 wt% (6 wt% MXene and 6 wt% Co). Additionally, the synergism between the foam structure and TiO 2 nanocrystals resulted in improved thermal conductivity , ranging from 1.28 W/(m·K) to 1.36 W/(m·K), which were 2–6 times higher than that in the solid composite films . This study provided new insights into the simultaneously enhanced EMW absorption and dissipating heat ability in polymer composite foams with a low percolation threshold .
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）