NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 16
·7704-7710
·
IF 3.925
Yaqi Wang,Zhihu Pan,Xiaohong Ji
Among transition-metal oxides, vanadium oxides and iron oxides have attracted much attention for electrochemical energy storage devices due to their high theoretical specific capacities and multiple variable valence states of V and Fe. However, the poor conductivity of both oxides leads to poor rate performance and high charge transfer resistance between the electrolyte and electrodes. Herein, Ti3C2Tx-wrapped V2O5/Fe2O3 (VFO) composites were designed and prepared for achieving enhanced electrochemical performance. The VFO composites on carbon cloth were synthesized by a hydrothermal method, and the optimized VFO electrode exhibited a capacitance of 435.2 mF cm−2 at a current density of 2 mA cm−2. By wrapping with Ti3C2Tx, the areal capacitance of the VFO composite electrode was greatly enhanced up to 1150.82 mF cm−2 at a current density of 2 mA cm−2. The enhanced electrochemical performance of the Ti3C2Tx@VFO composites is mainly attributed to the synergistic effects of the improved conductivity and diminished collapse and falling off of VFO during the charging and discharging processes. For practical application, asymmetrical supercapacitor (ASC) MnO2//Ti3C2Tx@VFO devices were constructed. The device exhibited a maximum energy density of 0.17 mW h cm−2 at a power density of 1.26 mW cm−2 with a capacitance retention of 74.92% after 5000 cycles. This work indicates the potential application of various oxides in high-performance supercapacitors by modification with MXenes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Longhui Dai,Huimin Yu,Yunkai Wang,Xuyang Zhang,Fang Xu,Xiaofang Pan,Jing-Ting Luo,Aihua Zhong
MXenes have attracted tremendous attention in electromagnetic interference shielding, energy storage, and gas and humidity detections because of their ultralarge surface area and abundant functional groups. However, their poor stability against hydration and oxidation makes them challenging for long-term storage and applications. Herein, we proposed and demonstrated a Ti3C2Tx MXene composite-based humidity sensor, of which the stability is pronouncedly enhanced by introducing an O2 adsorption competitor of extracted bentonite (EB). All the results of TEM, XPS, and Raman spectroscopy show that the oxidation of the Ti3C2Tx MXene is significantly suppressed by the introduction of EB. Its excellent performance in humidity detection further confirms the effectiveness of EB in improving the stability. An ultrahigh response value of 6400% and an ultrafast response time of 1 s at 85% RH are observed, suggesting promising prospects for superior humidity detection of the Ti3C2Tx MXene composite. Furthermore, its feasibility for flexible humidity detection was also examined on a PET substrate, which exhibited high flexibility and excellent discrimination in speaking words.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
iScience
·
2023
·
IF 5.8
Guohong Wang,Minghang Li,Jianxi Liu,Fang Ye,Laifei Cheng,Xiaomeng Fan,Xingmin Liu,Ralf Riedel
MXenes have been proven to be outstanding lossy phase of advanced electromagnetic interference (EMI) shielding materials. However, their poor tolerance to oxygen and water results in fast degradation of the pristine two-dimensional (2D) nanostructure and fading of the functional performance. Herein, in this research, natural antioxidants (e.g., melatonin, tea polyphenols, and phytic acid) were employed to protect the Ti 3 C 2 T x MXene from its degradation in order to achieve a long-term stability of the EMI shielding performance. The results showed that the synthesized composites comprised of antioxidants and Ti 3 C 2 T x exhibited a decelerating degradation rate resulting in an improved EMI shielding effective (SE) stability. The antioxidation mechanism of the applied antioxidants is discussed with respect to the nanostructure evolution of the Ti 3 C 2 T x MXene. This work contributes to the basic foundations for the further development of advanced MXenes for stable applications in the EM field.
研究领域:
材料科学
·
电磁学
·
化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ying Liu,Yubo Zhao,Changtu Ma,Min Zhao,Huayun Du,Yang Ge,Jianlong Ji,Kexun Li,Yanxia Wu
Ti 3 C 2 T x MXene has been regarded as a promising candidate for advanced microwave absorption materials. However, the microwave absorbing performance of Ti 3 C 2 T x MXene is suppressed by the single dielectric loss mechanism and impedance mismatch because of the high conductivity. To effectuate a good absorption capability of Ti 3 C 2 T x MXene, this paper constructs a heterostructured Co/Ti 3 C 2 T x hybrid by atomic layer deposition of magnetic Co nanoparticles on Ti 3 C 2 T x nanosheets . The microstructures, magnetism , and microwave absorption behaviors of the Co/Ti 3 C 2 T x hybrids are investigated systematically. The results show that the frequency-dependent electromagnetic parameters of the Ti 3 C 2 T x MXene become tunable by controlling the content of Co decorations, which are conducive to both magnetic loss and impedance matching . The Co/Ti 3 C 2 T x hybrid with ultralow Co decoration content (only 1.52 wt%) achieves the minimum reflect loss of −54.32 dB at a thin matched thickness of 1.29 mm, and the corresponding effective absorption bandwidth with reflection loss below −10 dB reaches 4.29 GHz. The atomic layer deposited magnetic metal nanostructures provides an effective strategy for preparing MXene-based hybrids which not only have high absorption efficiency but also significantly reduce the use of magnetic metals.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Zhen Wang,Yunhao Wu,Jianjian Zhong,Jianling Li
Two-dimensional transition metal carbide/nitride MXenes have become a hot topic in the field of lithium-ion energy storage due to their unique surface chemistry and excellent electronic conductivity. However, electrodes made of multilayer MXenes suffer from low capacity, poor cycling performance, and slow lithiation kinetics. In this paper, the MoP2@Ti3C2Tx composite was prepared by adsorbing Mo cations on the surface of Ti3C2Tx followed by phosphatization. The uniformly distributed MoP2 nanostructure effectively increases the layer spacing, enlarges the specific surface area, and improves the structural stability of the material. At the same time, MoP2 and Ti3C2Tx are connected by a P−O bond, which accelerates the diffusion and migration of lithium ions and the charge transfer, and the strong covalent Ti−O−P bond can cause rapid charge transfer and stabilize the structure of the material. The electrochemical activity of MoP2 nanostructures also provides more active sites for lithium ions. The presence of the lamellar structure of Ti3C2Tx also inhibits to some extent the expansion of the transition metal phosphide volume with the cycling process, thus realizing more excellent lithium storage capacity. 1/2 MoP2@Ti3C2Tx material has a high reversible capacity of 165.7 mAh g−1 (172% improvement over the original material) at a current density of 3000 mA g−1. The assembled 1/2 MoP2@Ti3C2Tx//AC Li-ion hybrid capacitor LIC has 85.5% capacity retention after cycling at a current density of 1500 mA g−1. The ability of the assembled full battery to illuminate light-emitting diode (LED) light bulbs further confirms that the electrochemical reliability of the device meets the requirements of real-world applications. The results demonstrate that the strategy of constructing in situ-grown MoP2 nanostructures can effectively improve MXene high-energy-density applications in lithium-ion energy storage.
研究领域:
材料科学
·
储能技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Nano
·
2025
·
IF 8.2
Pingan Chen,Sizeng Hong,Xiangcheng Li,Yingli Zhu,Fu Chen,Mengke Qiao
Carbon nanofibers can be widely used in the field of electromagnetic wave absorption due to corrosion resistance, low density and good chemical stability. Here, we report a strategy to achieve strong microwave absorption capability by adjusting the crystallinity of carbon nanofibers containing Al 2 O 3 and TiO 2 . TiO 2 with Ti 3 C 2 T x MXene as a precursor decreases the crystallization temperature of Al 2 O 3 from 1400 °C to 800 °C in the carbon nanofibers. The diameter distribution of carbon nanofibers is uniform, though the surface of carbon nanofibers is getting rough with Ti 3 C 2 T x content increasing. The minimum reflection loss of carbon nanofibers is -55.78 dB at a thickness of 4.32 mm; the effective absorption bandwidth reaches 5.41 GHz (12.59-18 GHz) at a thickness of 1.67 mm, almost covering the Ku band. The excellent microwave absorption performance can be attributed to the synergistic effect of the non-crystalline carbon matrix and crystalline Al 2 O 3 /TiO 2 , in which the former improves impedance matching with free space, while the latter enhances the attenuation capability to the electromagnetic wave.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Bingzhe Jia,Huailin Yang,Lei Wang,Zhiqi Zhao,Xinming Wu
Compared with most transition metal based electrode materials, 2D M n+1 X n T x has high conductivity and good solvent compatibility. However, its low energy density hinders its application as supercapacitior electrode for electrochemical energy storage applications. Herein, the interface-pillared of Fe-MOF (MIL-100(Fe)) onto Ti 3 C 2 T x MXene layer, which provide rich electrochemical active sites, is achieved, and the MOF nanospheres with MXene nanosheets are subsequently converser into three dimensional multilayer porous nanostructures through the chemical bond couping. Therefore, the MOF nanospheres are anchored between the nansheets of MXene, enabling the fast ion transportation in the three dimensional nanostructures. Menanwhile, the MOF nanospheres prevent the aggregation of MXene nanosheets, and the laminar structure is maintained for more redox reaction sites within the hybrid electrodes through fast charge–discharge cycles. As a result, the MIL-100(Fe)/Ti 3 C 2 T x MXene electrode displays superior energy density (85.53 Wh kg −1 ), which is much higher than the other MXene-based electrodes as far as we know. This design strategy of 2D hybrid electrodes opens up a new way for the commercial application of high perfermance supercapacitor.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 2
·1362-1375
·
IF 11.806
Wang Deng,Wang Rui,Huang Kai,Lei Ming,Tang Haolin
The Si-P nanohybrids, as an underlying candidate for the anode material of the next-generation lithium-ion batteries (LIBs), possess a high theoretical specific capacity of 2900 mAh g −1 but decays rapidly owing to the large volume change during lithiation/delithiation. Meanwhile, two-dimensional transition metal carbides (MXenes) with outstanding conductivity and specific crystal structure have been revealed with a relative low Li + diffusion barrier, which exhibits underlying application prospects in the area of energy storage and can be particularly utilized as the conductive matrix for realizing the outstanding performance of lithium storage. Herein, we employ an MXenes (Ti 3 C 2 T x )-buffer strategy to improve the electrochemical properties of the traditional Si-P anode by a relatively simple mechanical ball-milling method. Obvious chemical bonds between Si-P and Ti 3 C 2 T x have been confirmed for as-prepared Si-P/Ti 3 C 2 T x composites, where P nanolayer acts as an intermediate layer and guarantees the composite integrity and the tight contact between red phosphorus, Si, and Ti 3 C 2 T x matrix. Moreover, the Si-P/Ti 3 C 2 T x composite electrode, in comparison with Si-P composite and Si, exhibits an enhanced rate performance (632.4 mAh g −1 at 5A g −1 ) and a higher reversible capacity (980.8 mAh g −1 after 500 cycles at 500 mA g −1 ), indicating it’s a promising candidate for advanced LIBs anode. Graphical abstract The high-performance chemically bonded double-conductive protective layer lithium-ion battery anode was developed by mechanical ball-milling strategy.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ruipeng Chen,Xuexia Jia,Xingpeng Huang,Zefeng Mao,Hong Zhang,Huanying Zhou,Shuyue Ren,Zhixian Gao
Arsenic contamination in water poses significant health risks, necessitating effective detection methods to ensure public safety. In this study, a novel FeS x @MOF-808/Ti 3 C 2 T x composite sensor was introduced for the electrochemical detection of arsenite (As(III)), a highly toxic form of arsenic. Based on a straightforward synthetic approach, the composite enhances the sensitivity and selectivity for As(III) detection. The electrochemical performance in various buffer solutions was characterized through square wave anodic stripping voltammetry. The sensor demonstrated exceptional sensitivity with a detection limit of 0.02 ng/mL and a broad linear response range of 0.05–100 ng/mL, surpassing World Health Organization guidelines. Notably, the FeS x @MOF-808/Ti 3 C 2 T x composite exhibited minimal interference from common heavy metals. The superior adsorption properties, attributed to the high surface area and porosity of the composite, facilitated rapid arsenic ion capture. The developed FeS x @MOF-808/Ti 3 C 2 T x sensor offers a robust platform for reliable As(III) detection in diverse water matrices. This innovation contributes to environmental monitoring, providing a cost-effective and efficient method for arsenic detection, particularly in resource-limited regions. The findings underscore the potential of integrating advanced materials into electrochemical sensors, thereby paving the way for future developments in sustainable water quality management.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Huanhuan Niu,Xueyang Tu,Shuang Zhang,Yaya Li,Hailong Wang,Gang Shao,Rui Zhang,Hongxia Li,Biao Zhao,Bingbing Fan
Ti 3 C 2 T x nanosheets are attractive for electromagnetic wave absorption (EMA) materials requiring ultra-thin and high-performance due to their high conductivity and polarizability. However, the self-restacking of Ti 3 C 2 T x nanosheets unavoidably decreases the number of active sites, specific surface area, and conductivity. Herein, a simple strategy is developed to prepare a core–shell structure of SiO 2 @Ti 3 C 2 T x by electrostatic assembly and hydrogen bonding. SiO 2 spheres as templates cannot only prevent Ti 3 C 2 T x nanosheets from further stacking, but also modulate the surface impedance and significantly increase interfacial polarization loss. The resulted SiO 2 @Ti 3 C 2 T x composite can deliver superior absorption capacity with minimum reflection coefficient (RL) of −58.01 dB at an ultra-thin thickness of only 1.3 mm. The absorption efficiency is calculated over 99.999 % with an effective absorption bandwidth (EAB) of 3.44 GHz. Furthermore, with increasing amounts of SiO 2 templates, the EAB can be broadened up to 15.04 GHz (2.96–18 GHz) in the thickness range of 1–3 mm. The absorption mechanisms are described based on multiple reflection, polarization behaviors, tunable impedance matching, and conduction loss. The present work could pave a way for obtaining ultra-thin, high-performance MXene-based EMA materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-10
·
IF 17.694
Liu Na,Li Qiaoqiao,Wan Hujie,Chang Libo,Wang Hao,Fang Jianhua,Ding Tianpeng,Wen Qiye,Zhou Liujiang,Xiao Xu
Although Ti 3 C 2 T x MXene is a promising material for many applications such as catalysis, energy storage, electromagnetic interference shielding due to its metallic conductivity and high processability, it’s poor resistance to oxidation at high temperatures makes its application under harsh environments challenging. Here, we report an air-stable Ti 3 C 2 T x based composite with extracted bentonite (EB) nanosheets. In this case, oxygen molecules are shown to be preferentially adsorbed on EB. The saturated adsorption of oxygen on EB further inhibits more oxygen molecules to be adsorbed on the surface of Ti 3 C 2 T x due to the weakened p-d orbital hybridization between adsorbed O 2 and Ti 3 C 2 T x , which is induced by the Ti 3 C 2 T x /EB interface coupling. As a result, the composite is capable of tolerating high annealing temperatures (above 400 °C for several hours) both in air or humid environment, indicating highly improved antioxidation properties in harsh condition. The above finding is shown to be independent on the termination ratio of Ti 3 C 2 T x obtained through different synthesis routes. Utilized as terahertz shielding materials, the composite retains its shielding ability after high-temperature treatment even up to 600 °C, while pristine Ti 3 C 2 T x is completely oxidized with no terahertz shielding ability. Joule heating and thermal cycling performance are also demonstrated.
研究领域:
材料科学
·
纳米技术
·
表面化学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2022
·
IF 4.291
Baohui Zhang,Zhiqiong Li,Chong Li,Min Li,Chen Fu,Ran Tao,Xian-hu Zha,Honglang Li,Jingting Luo
This paper demonstrates chemi-resistive type and QCM ammonia sensors based on Ti 3 C 2 T x MXene with surface engineering. The morphology and structure composition of Ti 3 C 2 T x MXene were completely tested by XRD, SEM, TEM and Raman. The ammonia sensing performance of Ti 3 C 2 T x MXene sensors at room temperature were systematically studied. The QCM sensors show better performance towards ammonia than chemi-resistor sensors. The Ti 3 C 2 T x -S QCM sensor possesses quite sensitivity (49 Hz@100 ppb), high response/recovery capability (33 s/58 s) and good selectivity . XPS was introduced for the surface element status for the potential ammonia adsorption mechanism. It can be mainly related to for lowest average potential for reaction of Ti-S and the additional absorption towards the product nitric oxides enhancing the frequency shift by absorption mass increasing. This work confirms that surface engineering of Ti 3 C 2 T x MXene to be effective method for enhancing gas sensing performance, and the sensor shows potential application for low concentration ammonia sensing.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）