JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Bicheng Meng,Juan Yu,Wenlong Huang,Jiaxin Peng,Ziheng Wang,Kai Yang,Naixing Yang,Linbo Li
Fabricating composites with three-dimensional (3D) nano-vanadium-based oxides and with carbon materials is one of the most effective ways to improve the performance of anode materials for lithium-ion batteries (LIBs). Herein, we firstly synthesized 3D V 2 O 5 flowers (VOF) composed of interconnected ultrathin nanobelts through the surfactant-induced hydrothermal method , using vanadium pentoxide (V 2 O 5 ) as vanadium source and carbon nanotubes as the carbon matrix. And then, the 3D VOF@CNT composite anode material was successfully prepared by in-situ bonding carbon nanotubes (CNT). Test results showed that the CNT can effectively inhibit the agglomeration of VOF nanoparticles , and thereby optimize the composite anode material's cycling stability and electrical conductivity . Meanwhile, as the carrier of lithium-ion (Li + ), the VOF has a unique petal-like structure, which not only contributes to the Li + diffusion and electron ( e - ) transport along the radial direction , but also provides sufficient space for the storage of Li + and relieves the volume change of electrode during the cycle. Therefore, the composite electrode material still maintains at a high capacity of 417.7 mAh·g −1 after 200 cycles when the current density is 0.1 A·g −1 . This work provides a method for preparing transition metal oxide electrode materials with great electrochemical performance and cycle stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 10
·4485-4493
·
IF 9.931
Lingyou Zeng,Kaian Sun,Zhichao Yang,Shengli Xie,Yanju Chen,Zhi Liu,Yaqing Liu,Jinchong Zhao,Yunqi Liu,Chenguang Liu
Three-dimensional (3D) nanomaterials have received significant attention for large-scale functional applications due to their large specific surface areas as well as desired electrical, physicochemical, and catalytic properties. Herein, we present a facile and effective synthetic route for in situ grown 3D hierarchical Ni3S2 superstructures (rod-like arrays and nanoforest patterns) on nickel foam. This handy strategy endows the Ni3S2 superstructures with large surface active areas, porosity, and macro-/mesoporous structures. We have shown that these materials can serve as highly active, binder-free, bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Moreover, these materials were found to provide a ∼100% faradaic yield towards both HER and OER and exhibit remarkable catalytic stability (for >50 h).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2020
·
IF 14.588
Fengtong Ji,Dongdong Jin,Ben Wang,Li Zhang
Swarm behaviors are nature’s strategies for performing cooperative work, and extensive research has been aimed at emulating these strategies in engineering systems. However, the implementation of vertical motion and construction of a 3D structure are still challenging. Herein, we propose a simple strategy for creating a hybrid-driven paramagnetic tornado-like microswarm in an aqueous solution by integrating the use of a magnetic field and light. The precession of a magnetic field results in in-plane rotation, and light promotes the conversion of a planar microswarm to a microswarm tornado, thus realizing the transition from 2D to 3D patterns. This 3D microswarm is capable of performing reversible, vertical mass transportation. The reconfigurable collective behavior of the swarm from 2D to 3D motion consists of rising, hovering, oscillation, and landing stages. Moreover, this 3D tornado-like microswarm is capable of controlling the chemical reaction rate of the liquid in which it is deployed, for example, the degradation of methylene blue. The experimental results unveil that the tornado-like microswarm can enhance the overall degradation while holding the reactant nearby and inside it because of the flow difference between near and far regions of the microswarm tornado. Furthermore, by applying an oscillating magnetic field, the 3D microswarm can process the trapped methylene blue for on-demand degradation. The microswarm tornado is demonstrated to provide a method for collective vertical transportation and inspire ideas for mimicking 3D swarm behaviors in order to apply the functional performance to biomedical, catalytic, and micro-/nanoengineering applications.
研究领域:
生物工程
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纳米技术
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Xiaogang Guo,Xueming Li,Zhibo Wei,Xiaolin Li,Lidan Niu
Superhydrophobic tri-dimensional Ni/Al coatings (3DNACs) with great application value have been successfully fabricated via a simple two-step method combined with hydrogen bubble dynamic template and electrophoretic deposition technique after 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane treatment. The surface morphologies and chemical compositions were analyzed by FE-SEM, EDS, XRD, AFM and FT-IR in detail. The water contact angle of superhydrophobic 3DNACs surface was as high as 156 ± 2° (>150) much larger than that of unmodified samples. Moreover, the obtained samples exhibited great thermal properties and combustion performance. Thus, the superhydrophobic 3DNACs with prominent exothermic capability turn out to be a promising novel energy in field of mirco/nano energy materials for longer-term storage or transportation, especially in high humid environment.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 14
·2104927
·
IF 17.521
Yafeng Zhang,Kai Ye,Qianru Liu,Juan Qin,Qike Jiang,Bing Yang,Feng Yin
Structure-controlled Pt-based nanocrystals have the great potential to provide a flexible strategy for improving the catalysis of the oxygen reduction reaction (ORR). Here, a new synthetic approach is developed to tune the 3D structure of Pt-based alloys, and switch a synthetic reaction which produces solid PtCu octahedral stars (OSs) to produce PtCu nested skeleton cubes (NSCs) by simple addition of Ni(acac) 2 . In particular, Ni 2+ -guided anisotropic growth is observed to generate the nested skeleton structure in PtCu NSCs. Ni 2+ , though absent from the nanoalloys, not only endows faster Cu reduction kinetics but also acts as a structure-directing agent. Moreover, it is shown that acetic acid treatment of PtCu NSCs/C exposes Pt-rich surface with a fine-tuned Pt d-band center energy and the reduced Cu leaching, resulting in strikingly high activity and stability. Acid-treated PtCu NSCs/C shows a remarkable ORR mass activity of 5.13 A mg Pt –1 , about 26 times higher than commercial Pt/C catalyst. This catalyst also exhibits excellent stability with a lower activity decay of 11.5% and the negligible variation in structure after 10 000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MODERN PHYSICS LETTERS B
·
2014
·
IF 0.687
Jijiao Li,Bo Li,Hongya Wu,Ji Zhou
Barium titanate ( BaTiO 3 ) woodpile structures with designed, three-dimensional (3D) geometry have been fabricated by direct-writing assembly techniques. Concentrated BaTiO 3 inks with suitable rheological properties were prepared to enable the fabrication of the complex 3D structures. It was demonstrated that BaTiO 3 inks with a total solids volume fraction of 0.41 are shear thinning and have a high storage modulus 1 × 10 5 Pa with a yield stress of 300 Pa. Additionally, the woodpile lattice structures exhibited an excellent self-supporting feature.
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2019
·Vol. 12
·期 3
·917-925
·
IF 4.495
Yao Li,Xiaoli Jiang,Zhuang Miao,Jiaruo Tang,Qiaoji Zheng,Fengyu Xie,Dunmin Lin
Graphical Oxygen Evolution Reaction : We report the Ni 1 V 1 P nanosheets self-assembled microspheres directly supported on the nickel foam via a simple two-step hydrothermal-phosphorization process as a highly efficient catalyst for oxygen evolution reaction. When served as a catalyst electrode for OER, the as-prepared Ni 1 V 1 P NSs/NF electrode only requires a low overpotential of 250 mV to drive 50 mA cm −2 and exhibits a long-term stability for 15 h continual measurement at 50 and 100 mA cm −2 in alkaline solutions. Recently, much attention has been paid to the low-cost, high-efficiency and stable non-precious metal catalysts for oxygen evolution reaction (OER). In this work, vanadium (V)-doped nickel phosphide (Ni 2 P) nanosheets self-assembled microspheres supported on nickel foam (Ni 1 V 1 P NSs/NF) were synthesized as a novel OER catalyst by combined processes of hydrothermal method and low-temperature phosphorization. The synthesized Ni 1 V 1 P NSs/NF material shows excellent catalytic activity due to its interconnected three-dimensional (3D) structure and synergistic effect between nickel and vanadium. When used as a catalyst electrode for OER, the synthesized Ni 1 V 1 P NSs/NF exhibits excellent electrocatalytic activity, reaching a current density of 50 mA cm −2 at the low overpotential of 250 mV in 1.0 M KOH. This material also shows superior electrochemical stability with negligible decay of the activity after continual measurement for 15 h at 50 and 100 mA cm −2 in 1.0 M KOH, respectively. This work provides a valuable method to synthesize efficient OER catalysts by doping valence-variable metal ions and designing distinctive 3D structure.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 48
·期 6
·2496-2504
·
IF 3.3
Jiao Wu,Bingbing Chen,Aihu Feng,Kun Liu,Yun Yu
Capacitive deionization is a promising solution for freshwater production with Ti3C2Tx emerging as a momentous electrode material. Here, highly porous 3D nitrogen-doped Ti3C2Tx (3D-N-Ti3C2Tx) is developed by using electropositive melamine to electrostatically induce electronegative Ti3C2Tx nanosheets to be reconstructed to alleviate the severe stacking problem of Ti3C2Tx layers. 3D-N-Ti3C2Tx has a large specific surface area (129.48 m2 g−1) and pore volume (0.372 cm3 g−1), exposing numerous ion adsorption sites. Also, 3D-N-Ti3C2Tx achieves nitrogen doping, which greatly improves the hydrophilicity and electrical conductivity. With the combined advantages of a three-dimensional structure and nitrogen doping, 3D-N-Ti3C2Tx achieves a specific capacitance of 101.9 F g−1 in 1 mol L−1 NaCl solution and demonstrates fantastic desalination performance with a high desalination capacity of 31.51 mg g−1, surpassing those of the majority of reported Ti3C2Tx electrodes, and outstanding desalination cycling stability in 500 mg L−1 NaCl solution at 1.2 V. This work significantly contributes to the advancement of Ti3C2Tx electrode material in CDI.
研究领域:
材料科学
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环境工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Junchao Han,Wenzhe Niu,Wuning Yuan,Menghui Wei,Bo Zhang,Yanhui Guo
Monolithic catalysts have irreplaceable advantages in hydrogen (H2) production through catalytic dehydrogenation from liquid-phase hydrogen storage materials. However, monolithic catalysts suffer from an inevitable reduction in accessible active sites due to the reduced specific surface area and hindered mass transfer. Therefore, a rational three-dimensional (3D) structure of monolithic catalysts is needed to adjust the structural factors for maximizing performance. Herein, a series of efficient and low-cost 3D catalysts with designed periodic structures were successfully fabricated. Due to the optimized specific surface area and bubble transport of the elaborate 3D structure, compared to the disordered foam structure, the new series of monolithic catalysts showed 2.3- and 1.6-fold improvement in overall catalytic performance at 298 and 318 K without any change in physiochemical characteristics, with hydrogen generation rates of 2548 and 3885 mL gcat–1 min–1, respectively. In addition, a three-period structural design philosophy for 3D catalysts was summarized, and the concept of surface activity was introduced to provide quantifiable criteria for guidance of structural optimization. The outcomes in this paper may open up new insights for building high-efficiency monolithic catalysts.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Zhangfeng Wu,Qili Sun,Xusong Huang,Mengxiang Zeng,Yicheng Wu,Haiyan Fu
Due to the requirement for wearability and the limitation of flexibility, as well as the lack of materials with both conductive, flexible, and energy storage functions, the structure of flexible supercapacitors is often presented in a two-dimensional plane form. Consequently, the thickness is limited, resulting in low capacity. In order to address this issue, a new approach has been attempted here. By utilizing 1 mm flexible carbon fiber felt as a conductive framework and mechanical support, a certain amount of acetylene black and activated carbon are filled and cured to fully leverage the characteristics of carbon fiber felt for significantly enhancing capacity while meeting performance requirements for flexible supercapacitors. The resulting flexible supercapacitor exhibits high strength, large capacity (1.5Fcm −2 ), good responsiveness, as well as excellent flexibility and magnification performance. Additionally, by using the thickness of carbon fiber felt to increase the thickness of the supercapacitor and changing its shape from the sheet to block accordingly allows for corresponding increases in capacitance and volume. This transformation seems to demonstrate that carbon fiber felt may serve as a framework bridging conventional supercapacitors with flexible ones while transitioning from planar structures to three-dimensional ones.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-6
·
IF 14.919
Xu Yang,Li Ye,Zheng Ning,Zhao Qian,Xie Tao
The art of origami has emerged as an engineering tool with ever increasing potential, but the technique is typically limited to soft and deformable materials. Glass is indispensable in many applications, but its processing options are limited by its brittle nature and the requirement to achieve optical transparency. We report a strategy that allows making three dimensional transparent glass with origami techniques. Our process starts from a dynamic covalent polymer matrix with homogeneously dispersed silica nanoparticles. Particle cavitation and dynamic bond exchange offer two complementary plasticity mechanisms that allow the nanocomposite to be permanently folded into designable geometries. Further pyrolysis and sintering convert it into transparent three dimensional glass. Our method expands the scope of glass shaping and potentially opens up its utilities in unexplored territories.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Cun-Guang Liang,Akram Yasin,Linsheng Zhang,Peng Zhang,Kefa Zhou,Bin Hao,Hui Li,Peng-Cheng Ma
Solar-driven interfacial evaporation is a promising desalination technology to alleviate global water scarcity. However, the evaporation rate and long-term stability are still the key constraints on the generation of solar steam. Herein, we proposed the fabrication of a specific three-dimensional (3D) evaporator featured with multi-surface evaporation, which was realized by modifying basalt fiber with photothermal polypyrrole. The microstructure of the evaporator ensured all-around light capture capability. In view of the macrostructure, the fiber-based evaporator greatly enhanced the water transportation and suppress the heat conduction loss, consequently, an evaporation rate as high as 3.61 kg/m 2 /h was achieved under one sun irradiation, and this was well beyond 179% of the input solar energy limit. The unique 3D interconnected water transport channels ensured a steady water supply for desalination and facilitated the self-cleaning behavior of the evaporator. The Marangoni effect-driven salt rejection was proposed to interpret this observation and the results were further verified by a theoretical simulation. The concept of 3D solar evaporator design makes it possible to achieve efficient solar desalination while free of suffering salt blockage, which is expected to resolve difficult problems in the desalination industry by offering a scalable, efficient, and sustainable solution to the global demand for freshwater.
研究领域:
材料科学
·
环境科学
✓ 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）