SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Yajie Zhang,Yi Li,Yadong Jiang,Zaihua Duan,Zhen Yuan,Bohao Liu,Qi Huang,Qiuni Zhao,Yajie Yang,Huiling Tai
Transition metal carbides/nitrides (MXenes) have shown great potential in room temperature (RT) gas sensors, but the self-stacking of MXene sheets limits their sensitivity and response/recovery speed. In addition, the poor selectivity of MXenes sensors caused by the conventional single sensing mechanism remains a challenge. Herein, a synergistic effect of charge transfer and interlayer swelling is proposed to comprehensively improve the gas sensing performance of the MXenes toward oxidizing NO 2 . To this end, a resistive gas sensor is prepared by combining the accordion-like V 2 CT x MXene and n-type SnS 2 nanoplates . The results reveal that the NO 2 sensitivity of the V 2 CT x /SnS 2 sensor is enhanced by 581.6 times compared to the pristine V 2 CT x sensor, while achieving ultrafast response and recovery speeds (4.8/4.7 s) at 25 °C under 51.9 % relative humidity. Furthermore, the V 2 CT x /SnS 2 sensor exhibits excellent selectivity (response ratio > 5) to NO 2 . The outstanding gas sensing performances can be attributed to the synergistic sensing of charge transfer and interlayer swelling, unique structure and more active sites. This work expands the gas sensing application of the V 2 CT x MXene and promotes the in-depth combination of multiple sensing mechanisms, opening an effective avenue for developing high-performance RT NO 2 sensors.
研究领域:
材料科学
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传感器技术
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环境监测
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DOI
高影响因子
ACS Nano
·
2021
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IF 15.881
Xiaodong Zhu,Ziyi Cao,Wenjie Wang,Haijing Li,Juncai Dong,Shangpeng Gao,Dongxiao Xu,Lei Li,Jianfeng Shen,Mingxin Ye
Mn-based aqueous zinc-ion batteries (ZIBs) are promising candidate for large-scale rechargeable energy storage because of easy fabrication, low cost, and high safety. Nevertheless, the commercial application of Mn-based cathode is hindered by the challenging issues of low rate capability and poor cyclability. Herein, a manganese–vanadium hybrid, K–V2C@MnO2 cathode, featured with MnO2 nanosheets uniformly formed on a V2CTX MXene surface, is elaborately designed and synthesized by metal–cation intercalation and following in situ growth strategy. Benefiting from the hybrid structure with high conductivity, abundant active sites, and the synergistic reaction of Mn2+ electrodeposition and inhibited structural damage of MnO2, K–V2C@MnO2 shows excellent electrochemical performance for aqueous ZIBs. Specifically, it presents the high specific capacity of 408.1 mAh g–1 at 0.3 A g–1 and maintains the specific capacity of 119.2 mAh g–1 at a high current density of 10 A g–1 in a long-term cycle of up to 10000 cycles. It is superior to almost all reported Mn-based cathodes for ZIBs in the aqueous electrolyte. The superior electrochemical performance suggests that the Mn-based cathode materials designed in this work can be a rational approach to be applied for high-performance ZIBs cathodes.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Di Wu,Sairao Zhao,Tao Huang,Wenbin He,Xin Zhou,Guanzhong Wang,Mengdi Guo,Xiao Luo,Minglei Cao,Yang Yue,Wei Lai,Chuankun Zhang,Yanan Ma
The flexible self-charging zinc ion micro-supercapacitors (ZIMSC) that can be effectively charged by harvesting ubiquitous energy from the air, not only achieve power supply anytime and anywhere but also improve the integrated degree without external charging plug or cable, enabling it a promising candidate for the wearable electronic device in various environmental scenarios. Herein, we reported a chemically self-charging ZIMSC based on a free-standing V 2 CT x /CNT electrode. Introducing 1D CNT into 2D V 2 CT x fundamentally overcomes the self-stacking problem of the nanosheets while providing additional ion transport paths and improving the conductivity of active electrodes. The area-specific capacity of V 2 CT x /CNT-based ZIMSC achieves 117.2 mF cm −2 after 8.0 h self-charging. The excellent self-charging performance is attributed to the oxidation of vanadium in the V 2 CT x -based cathode stimulated by ambient oxygen, accompanied by the Zn 2+ deintercalation process. The flexible ZIMSC exhibited an optimal area capacitance of 246.88 mF cm −2 at a current density of 0.5 mA cm −2 . Additionally, the self-charging ZIMSC is integrated with the V 2 CT x -based pressure sensors for a self-powering wearable system that exhibits excellent stability over 50,000 loading/unloading cycles. This work provides a rational design for constructing highly efficient self-charging energy storage devices and broadens the horizons of flexible wearable devices.
研究领域:
材料科学
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能源存储
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柔性电子
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纳米技术
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
Weiyan Jiang,Huizhong Shi,Miao Shen,Rui Tang,Zhongfeng Tang,Jian-Qiang Wang
The lack of suitable cathode materials with a high capacity and good stability is a crucial problem affecting the development of aqueous Zn-ion batteries. Herein, a novel strategy for the modification of V2CTx through molten salt thermal treatment is proposed. In the novel route, S heteroatoms were introduced into V2CTx through a substitution reaction during the dissolution of Li2S in LiCl–KCl molten salts. Then, surface V2O5 was obtained through the in situ electrochemical charging/discharging of the S-doped V2CTx (MS-S-V2CTx) cathode. The assembled Zn/MS-S-V2CTx battery showed a high reversible discharge capacity of 411.3 mAh g–1 at a current density of 0.5 A g–1, an 80% capacitance retention after long cycle stability tests at 10 A g–1 for 3000 cycles, and a high energy density of 375.5 Wh kg–1 in 2M ZnSO4. Density functional theory calculations demonstrate that the improved electrochemical performance of the cathode can be attributed to the introduced S heteroatoms, which considerably reduced the ion diffusion energy barrier for Zn2+ ions and improved the stability of V2O5. This work provides a novel method to produce highly active and stable vanadium-based cathodes for aqueous Zn-ion batteries.
研究领域:
材料科学
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电化学
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储能技术
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Ziying Ji,Ying Feng,Lu Liu,Wei Zheng,Meng Wu,Yuexia Li,Zhengming Sun,Guobing Ying
Energy storage devices are progressively advancing in the light-weight, flexible, and wearable direction. Ti 3 C 2 T x flexible film electrodes fabricated via a non-contact, cost-effective, high-efficiency, and large-scale inkjet printing technology were capable of satisfying these demands in our previous report. However, other MXenes that can be employed in flexible energy storage devices remain undiscovered. Herein, flexible V 2 CT x film electrodes (with the low formula weight vs Ti 3 C 2 T x film electrodes) with both high capacities and excellent photoelectric properties were first fabricated. The area capacitances of V 2 CT x film electrodes reached 531.3–5787.0 μF⋅cm −2 at 5 mV⋅s −1 , corresponding to the figure of merits (FoMs) of 0.07–0.15. Noteworthy, V 2 CT x film electrode exhibited excellent cyclic stability with the capacitance retention of 83 % after 7,000 consecutive charge–discharge cycles. Furthermore, flexible all solid-state symmetric V 2 CT x supercapacitor was assembled with the area capacitance of 23.4 μF⋅cm −2 at 5 mV⋅s −1 . Inkjet printing technology reaches the combination of excellent photoelectric properties and high capacities of flexible V 2 CT x film electrodes, which provides a new strategy for manufacturing MXene film electrodes, broadening the application prospect of flexible energy storage devices.
研究领域:
材料科学
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能源存储
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产品关联
DOI
PubMed
高影响因子
Micromachines
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2024
·Vol. 15
·期 7
·828
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IF 3
Ji Li,Yu Wang,Xinyuan Pei,Chunhe Zhou,Qing Zhao,Ming Lu,Wenjuan Han,Li Wang
The ZnMn2O4/V2CTxcomposites with a lamellar rod-like bond structure were successfully synthesized through high-temperature calcination at 300 °C, aiming to enhance the Li storage properties of spinel-type ZnMn2O4anode materials for lithium-ion batteries. Moreover, even though the electrode of the composites obtained at 300 °C had a nominal specific capacity of 100 mAh g−1, it exhibited an impressive specific discharge capacity of 163 mAh g−1after undergoing 100 cycles. This represents an approximate increase of 64% compared to that observed in the pure ZnMn2O4electrode (99.5 mAh g−1). The remarkable performance of the composite can be credited to the collaborative impact between ZnMn2O4and V2CTx, leading to a substantial improvement in its lithium ion storage capacity. Therefore, this study offers valuable insights into developing cost-effective, safe, and easily prepared anode materials.
研究领域:
材料科学
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能源技术
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产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
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2022
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IF 6.959
Qing Zhao,Shanshan Tan,Ji Li,Jiaming Li,Xianyu Chu,Cuimei Zhao,Junkai Zhang,Li Wang,Shichong Xu,Ming Lu
The single-component electrode materials have not met the requirement of high performance of energy storage devices. Hybrids combined with two-dimensional materials and nanoparticles exhibit problem-solving ability. In this work, ZnFe2O4@V2CTx hybrids are fabricated by in situ chemical co-precipitation, and the morphology, microstructure, and electrochemical performance are characterized. Scanning electron micrscopy images show the internal gaps of the accordion-like structure of V2CTx MXene are filled with ZnFe2O4 nanoparticles. On the basis of the different lithium storage mechanisms and the stable interface electronic transfer, the hybrid with the weight ratio of V2CTx MXene and ZnFe2O4 being 0.5:1 exhibits an amazing reversible capacity of 1189 mAh g–1 after 100 cycles, which is 7.62 times that of pure ZnFe2O4. Obviously, ZnFe2O4@V2CTx MXene electrodes contribute synergetic charge storage via the redox and intercalation mechanism. Interestingly, ex situ X-ray photoelectron spectra are utilized to explore the complicated electrode reaction. These results tend to confirm Zn has not been involved in the lithium storage process. The study will illuminate the application prospect of transition metal oxides-based materials as high-performance electrodes.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2024
·Vol. 12
·期 24
·14759-14768
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IF 10.7
Jiao Wu,Long Liu,Cai-Yun Ren,Yong-Chao Zhang,Jian Gao,Xiao-Dong Zhu
The high safety, compatible device size, superior energy density, and cost efficiency make in-plane aqueous zinc-ion microbatteries (AZIMBs) one of the most promising candidates for miniaturized energy storage. However, the inherent stacking structure within in-plane AZIMBs poses a hindrance to improving their energy density. Herein, this work presents a one-step approach for fabricating 3D cross-linked structures in V2CTx@rGO microelectrodes by laser processing technology, aiming to enhance the electrochemical performance of AZIMBs within a limited area by exploiting the vertical dimension of 3D architectures. The laser heat generated during laser processing induces the conversion of a 2D V2CTx@GO stacked structure into a 3D V2CTx@rGO skeleton structure, enabling the microelectrode to possess an optimal 3D conductive network, efficient charge transport pathway, and complete exposure of active sites. Moreover, the utilization of vanadium-based oxides derived from V2CTx MXene nanosheets on the surface during charging enhances the electrochemical performance of 3D AZIMBs. The obtained 3D VOx-V2CTx@rGO microelectrodes exhibit excellent rate performance, demonstrating an average reversible capacity ranging from 459 to 342 mA h g−1 at current densities varying from 0.8 to 2.5 A g−1, respectively. Additionally, the fabricated 3D VOx-V2CTx@rGO AZIMBs demonstrate exceptional flexibility and integrability, thus showing significant potential in microsized energy storage devices.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Tingting Yu,Shaobin Li,Fengbo Li,Li Zhang,Yuping Wang,Jingyu Sun
Two-dimensional (2D) MXene nanomaterials display great potential for green energy storage. However, as a result of self-stacking of MXene nanosheets and the presence of conventional binders, MXene-based nanomaterials are significantly hindered in their rate capability and cycling stability. We successfully constructed a self-supported stereo-structured composite (TMA-V 2 CT x /CoV-LDH/NF) by in-situ growing 2D cobalt vanadium layered double hydroxide (CoV-LDH) vertically on 2D few-layered V 2 CT x MXene nanosheets and interconnecting it with Ni foam (NF) with a self-supported structure to act as a binder-free electrode. In addition to inhibiting CoV-LDH aggregation, the highly conductive V 2 CT x MXene and CoV-LDH work synergistically to improve charge storage. The specific capacitance of the TMA-V 2 CT x /CoV-LDH/NF electrode is 2374 F/g (1187 C/g) at 1 A/g. At the same time, the TMA-V 2 CT x /CoV-LDH/NF exhibits excellent stability, retaining 85.3 % of its specific capacitance at 20 A/g after 10,000 cycles. In addition, the hybrid supercapacitor (HSC) is assembled based on positive electrode (TMA-V 2 CT x /CoV-LDH/NF) and negative electrode (AC), achieving the maximum energy density of 74.4 Wh kg −1 at 750.3 W kg −1 . TMA-V 2 CT x /CoV-LDH/NF has potential as an electrode material for storing green energy. The research strategy provides a development prospect for the construction of novel V 2 CT x MXene-based electrode material with self-supported structures.
研究领域:
材料科学
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能源存储
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2025
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IF 9.8
Yu Han,Li Zhang,Shaobin Li,Fengbo Li,Jianjiao Xin,Xue Wang,Minjie Liang
Hydroquinone (HQ) and catechol (CC) are toxic isomers with similar structures that often coexist, leading to interference during detection. In this study, we employed a controllable selenization strategy to construct V 2 CT x MXene-based multiphase electrode materials (VSe 2 @V 2 O 3 @V 2 CT x MXene) for the simultaneous detection of HQ and CC. Electrochemical tests revealed VSe 2 @V 2 O 3 @V 2 CT x MXene modified electrode exhibited low electrochemical impedance, a large active surface area, and excellent electrocatalytic performance. The sensor demonstrated linear detection ranges for HQ and CC from 0.5 to 600 μM, with limits of detection 0.144 μM and 0.131 μM, respectively. Additionally, it exhibited excellent repeatability, reproducibility, selectivity, and stability. The practical applicability of the sensor was confirmed through testing in drinking water and beverages, showing satisfactory recovery rates. This work expands the application of V 2 CT x MXene in the field of electrochemical sensing and offers new insights for food safety monitoring.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 15
·2640
·
IF 5.719
Liming Yang,Tao Yang,Yafeng Chen,Yapeng Zheng,Enhui Wang,Zhentao Du,Kuo-Chih Chou,Xinmei Hou
The development of bifunctional electrocatalysts with efficient oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is still a key challenge at the current stage. Herein, FeNi LDH/V2CTx/nickel foam (NF) self-supported bifunctional electrode was prepared via deposition of FeNi LDH on V2CTx/NF substrate by hydrothermal method. Strong interfacial interaction between V2CTx/NF and FeNi LDH effectively prevented the aggregation of FeNi LDH, thus exposing more catalytic active sites, which improved electrical conductivity of the nanohybrids and structural stability. The results indicated that the prepared FeNi LDH/V2CTx/NF required 222 mV and 151 mV overpotential for OER and HER in 1 M KOH to provide 10 mA cm−2, respectively. Besides, the FeNi LDH/V2CTx/NF electrocatalysts were applied to overall water splitting, which achieved a current density of 10 mA cm−2at 1.74 V. This work provides ideas for improving the electrocatalytic performance of electrocatalysts through simple synthesis strategies, structural adjustment, use of conductive substrates and formation of hierarchical structures.Keywords:V2CTxMXene;layered double hydroxide;nanohybrids;overall water splitting
研究领域:
电化学
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材料科学
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能源材料
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产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2023
·
IF 5.9
Jun Zhu,Songrui Wei,Jie Tang,Yi Hu,Xiaoyu Dai,You Zi,Mengke Wang,Yuanjiang Xiang,Weichun Huang
Recently, novel two-dimensional materials, e.g., Xenes (graphdiyne, phosphorene, bismuthene, antimonene, etc.) and MXenes, have drawn great attention in nanophotonics due to their excellent flexibility, high photothermal conversion efficiency, and large thermal conductivity. Although the Xenes and MXenes have achieved rapid progress in many fields over the past decade, their relatively poor photodetection and nonlinear photonics have still limited their practical applications. In this work, a mixed-dimensional 2D MXene V2CTx nanosheet (NS)/0D bismuth quantum dot (Bi QD)-based heterostructure fabricated by a combination of selective etching and the hydrothermal method was simply deposited onto a clean poly(ethylene terephthalate) substrate with an embedded regular Ag lattice to prepare a flexible photoelectrochemical (PEC) electrode. The PEC result shows that the as-fabricated flexible electrode not only exhibits significantly improved photocurrent density (32.7 μA cm–2) and photoresponsivity (906 μA W–1) compared to individual MXene V2CTx NSs and Bi QDs but also displays high stability with a stable photocurrent density even after 200 bending cycles at 60°. Taking advantage of the Kerr effect of both MXene V2CTx NSs and Bi QDs, an all-optical switcher based on this mix-dimensional heterostructure for the spatial cross-phase modulation has also been realized with a preferred modulation depth. Density functional theory calculations provide direct evidence for the strong internal built-in electric field (7.3 × 107 eV m–1) created by the heterostructure for the enhancement of both photodetection and nonlinear photonics. The integration of Xenes or MXene-based mixed-dimensional heterostructures provides a concept and fundamental guidance to construct next-generation optoelectronic and photonic devices.
研究领域:
纳米光子学
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材料科学
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光电
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光子学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）