JOURNAL OF MATERIALS SCIENCE
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2020
·Vol. 55
·期 17
·7403-7416
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IF 3.553
Zhou Xing-hai,Su Kun-mei,Kang Wei-min,Cheng Bo-wen,Li Zhen-huan
To buffer the unavoidable volume expansion and structure collapse problems of transitional metal sulfides during lithiation process, herein, nanosized α-MnS homogenously embedded in axial multichannel carbon nanofibers was well designed and directly used as freestanding anodes for lithium-ion batteries (LIBs). The obtained carbon nanofibers were interwoven into a flexible and cross-linked film, which offered a 3D successive conductive networks and guaranteed sufficient contact interface for electrode/electrolyte. The nanosized α-MnS was homogenously embedded into the carbon nanofiber framework and surrounded with a thin protective carbon layer, which effectively maintained the structural integrity for a satisfied cycling performance. The high aspect ratio carbon nanofibers with axial open channels supplied sufficient active sites and formed long-range electronic pathways along the axial carbon wall. Meanwhile, the radial voids provided enormous accommodation space to alleviate volume expansion and shortened diffusion paths for faster ionic transfer. Benefitting from the above unique merits, the freestanding electrodes delivered excellent lithium storage performances and remarkable long-term cycling stability, including a high initial reversible capacity of 772 mAh g −1 and excellent cycling capacity retention of 93.4% after 100 cycles at a current density of 0.5 A g −1 .
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 24
·14347-14352
·
IF 3.119
Zhenzhan Yan,Li Yang,Ji-Min Han,Naimeng Song,Jianchao Liu
The ever-increasing demand for miniaturized explosive systems urgently calls for better performance studies through the synthesis of novel nanoscale materials. In this work, lead azide@porous carbon hybrids (LA@PC) are synthesized by in situ carbonization and azidation of a lead-containing cross-linked gel, in which the nanoscale LA is uniformly distributed on the porous carbon skeleton. The detailed characterization has shown that such outstanding performance stems from the LA nanoscale effect and the excellent conductivity and thermal conductivity of carbon cages. Because of the favorable unique structure, the prepared composite material exhibits excellent ignition performance, and its flame sensitivity can reach 42 cm, which solves the problem of poor ignition capacity of LA on all occasions. In addition, the composite has very low electrostatic sensitivity, further improving the safety of practical application. This work makes it possible for LA to be detonated without using lead styphnate, paving a new way for improving the flame sensitivity of primary explosives.
研究领域:
材料科学
·
爆炸物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Daping Hu,Yuhang Jia,Fuyao Huang,Yuhong Long,Chunjin Ai,Pengcheng Du
Transition metal phosphides (TMPs) are considered excellent candidate electrode materials for supercapacitors (SCs) due to their high theoretical capacity. However, the severe performance degradation of TMPs, originating from poor conductivity and resulting volumetric expansion under electrochemical conditions, hinders the practical and large-scale application in supercapacitor electrodes. Herein, a robust heterostructure of nanoscale nickel phosphide encapsulated in carbon microsphere (Ni 2 P @ CM) is constructed through the carbonization of spherical Ni-MOF, and followed by subsequent low-temperature phosphorylation. The MOF-derived uniform carbon layer on the Ni 2 P surface provides massive electron transport channels and physically restricts the volumetric expansion during electrochemical reactions , facilitating the electrode reaction kinetics and further leading to a good capacitive performance in high capacitance (1622 F/g at 1 A/g), long-term cyclic stability (75.2% capacitance retention after 8000 cycles at 20 A/g), and high rate capability. Furthermore, asymmetric SCs based on Ni 2 P @ CM and AC exhibit a high capacitance of 135.4 F/g at 0.5 A/g, and a remarkable energy density of 47.46 Wh/kg at a power density of 0.397 kW/kg with the excellent cyclic property. These results demonstrate that the methodology is highly promising in the design and construction of Ni 2 P/carbon hybrid electrodes, revealing an attractive candidate electrode material in high-property energy-storage devices.
研究领域:
材料科学
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能源存储
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2021
·Vol. 7
·期 3
·145
·
IF 4.702
Huazheng Sai,Meijuan Wang,Changqing Miao,Qiqi Song,Yutong Wang,Rui Fu,Yaxiong Wang,Litong Ma,Yan Hao
Aerogels are nanoporous materials with excellent properties, especially super thermal insulation. However, owing to their serious high brittleness, the macroscopic forms of aerogels are not sufficiently rich for the application in some fields, such as thermal insulation clothing fabric. Recently, freeze spinning and wet spinning have been attempted for the synthesis of aerogel fibers. In this study, robust fibrous silica-bacterial cellulose (BC) composite aerogels with high performance were synthesized in a novel way. Silica sol was diffused into a fiber-like matrix, which was obtained by cutting the BC hydrogel and followed by secondary shaping to form a composite wet gel fiber with a nanoscale interpenetrating network structure. The tensile strength of the resulting aerogel fibers reached up to 5.4 MPa because the quantity of BC nanofibers in the unit volume of the matrix was improved significantly by the secondary shaping process. In addition, the composite aerogel fibers had a high specific area (up to 606.9 m2/g), low density (less than 0.164 g/cm3), and outstanding hydrophobicity. Most notably, they exhibited excellent thermal insulation performance in high-temperature (210 °C) or low-temperature (−72 °C) environments. Moreover, the thermal stability of CAFs (decomposition temperature was about 330 °C) was higher than that of natural polymer fiber. A novel method was proposed herein to prepare aerogel fibers with excellent performance to meet the requirements of wearable applications.Keywords:fibrous aerogel;nanoscale interpenetrating network;secondary shaping;strength;thermal properties
研究领域:
材料科学
·
生物材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Long Li,Zhenzhan Yan,Li Yang,Ji-Min Han,Wenchao Tong
Due to its good sensitivity, detonation ability, and high-temperature resistance, cadmium azide is expected to be applied to microinitiating systems. Here we demonstrate an effective synthetic methodology (GAF-IH) to prepare nanoscale cadmium azide. A nanoscale mesoporous configuration is designed to construct azide precursor utilizing controlled self-assembly of inorganic and organic molecules followed by in situ carbonization crystallization. The nanoscale porous precursors can react with HN3 gas to form nanoscale cadmium azide composites (CdA/SA and CdA/C) in just 3 h, which takes much less time than traditional preparation methods of cadmium azide. The organic molecules and their carbonized skeletons can act as the carriers of nanoscale cadmium compounds to avoid agglomeration, as supporting materials for building HN3 azide gas channels, and as functional components in the nanoscale cadmium azide composites to influence their performance. CdA/C prepared by this route has favorable comprehensive properties, which not only has a high content of CdA (93.8%), indicating excellent detonation performance (tID < 10 μs), but also has good high-temperature resistance (Tp = 365 °C) and low electrostatic sensitivity (E50 = 1.76 J). Thanks to its nanoscale characteristics and outstanding performance, CdA/C has the potential to replace CA and modified CA in the application of microinitiating devices.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2019
·
IF 6.355
Lvping Fu,Huazhi Gu,Ao Huang,Yongshun Zou,Hongwei Ni
Lightweight materials containing nano-sized intracrystalline pores are reported, and their slag reaction behaviours are described. The introduction of nano-sized intracrystalline pores favouring the supersaturation of molten slag and the precipitation of solid phases at the reaction interfaces, and the isolation layer can prevent lightweight materials from further slag corrosion and penetration. Because the alumina materials have higher purity and a tight grain-bonding, they show the highest slag resistance. The impurities located between the grains are responsible for the deeper slag penetration of bauxite and magnesia materials. Moreover, the intergranular phases in the magnesia materials are interconnected, resulting in severe slag corrosion.
研究领域:
材料科学
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腐蚀工程
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2018
·Vol. 24
·期 48
·12600-12606
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IF 5.16
Ang Li,Xue Wang,Tao Wang,Huali Liu,Tunan Gao,Meihong Fan,Qisheng Huo,Zhen-An Qiao
Graphical Filling the gaps : A topotactic synthetic methodology allows the synthesis of nanosized hierarchical MFI zeolite spheres and particles from silica spheres and tetrapropylammonium hydroxide (TPAOH; see figure). Dissolved silica species rebond around TPA + and zeolite structures are generated with defective mesoporous walls as a result of desilication of the initial silica spheres. Upon further crystal growth, zeolite nanoparticles can be obtained. Much effort has been invested in the designed synthesis of zeolites with nanosized and hierarchical structures in recent decades, on account of increasing demands in practical applications, especially catalysis. Herein, a new topotactic synthetic strategy is demonstrated to synthesize nanosized and hierarchical zeolites in a one-step procedure. By using silica spheres as the adjustable amorphous precursors and tetrapropylammonium hydroxide as a structure-directing agent, effortless control of both size and porosity can be achieved in this system with no extra templates. With a simple hydrothermal process, hierarchical zeolite spheres can be modified with acid cites (Al species incorporated in the framework). Benefitting from its mesoporosity, palladium nanoparticles are incorporated into the nanosized hierarchical zeolite, which makes the materials suitable for use in a cascade catalysis reaction of benzimidazole derivatives, including independent acid catalysis and hydrogenation sites. The nanocomposites show exceptional activity and stability in catalysis and recycling reaction. This strategy can be developed into other versatile and practicable scaffolds for advanced zeolite catalytic nanoreactor systems.
研究领域:
材料科学
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化学工程
·
催化技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
·
IF 6.361
Jiajia Zhang,Fang Cui,Linxu Xu,Qinghai Ma,Yiwen Gao,Yang Liu,Tieyu Cui
Herein, a facial stratagem for the large-scale synthesis of NiO/C nanosheets used as magnetic adsorbents is proposed by using nanoscale coordination polymers (nanoCPs) as precursors. The NiO nanoparticles (NPs) scattered on the NiO/C nanosheets have an untrasmall size (~3 nm) as well as uniform dispersion, since the Ni 2+ ions are preassembled into the nanoCPs precursors by coordination bonds and transformed to NiO NPs in situ under the restriction of carbon layers. Thanks to the small size and spatially uniform distribution of NiO NPs , fully exposed carbon matrix containing part of graphene structures, and the high specific surface area of the special nanosheet structure, the magnetic NiO/C nanosheets have an a great breakthrough in the adsorption performance toward Congo Red (CR) among many reported NiO-based materials. The maximum adsorption capacity for CR is up to 2000 mg/g, and the adsorption kinetics and thermodynamics are also systematically studied. Moreover, the NiO/C nanosheets can be separated from water and reused simply by an external magnetic field. The NiO/C nanosheets with low cost and extraordinary adsorption ability have great potential in water pollution treatment area.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
MACROMOLECULES
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2025
·
IF 5.2
Mengen Zhang,Ruijia Wang,Tinghao Jia,Congjing Ren,Jingdai Wang,Yongrong Yang,Yao Yang
A molecular-level understanding of the ion cluster morphology is crucial to designing the structure and enhancing the properties of random polyethylene ionomer. Here, we report that the strategic addition of aliphatic disodium salt has a pronounced effect on the mechanical properties and nanoscale morphology. With the addition of various aliphatic disodium salts, both the tensile strength and Young’s modulus are significantly increased. By comparing the results of atomistic molecular dynamics simulations with experimental characterization data, the ionic cluster nanoscale morphology varies with different chain-length disodium salts, while maintaining the crystallization of the polyethylene matrix. The alkyl disodium salts with relatively short alkyl chains (C12) bridge between clusters by anchoring to two different clusters, helping to redistribute the clusters within the polymer matrix and providing additional cross-link strength. The cluster morphological evolution during stretching was simulated, and its relation to mechanical properties is comprehensively discussed. This, in turn, unlocks the potential for structural regulation at the nanoscale by additive manufacturing to enhance the performance.
研究领域:
材料科学
·
高分子化学
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Qi Deng,Long Chen,Lei Shen,Xue Xia,Qinglin Zhang
Semiconductor single-crystal thin films (SCTFs) with nanoscale thickness play an important role in high-performance electronics and optoelectronic devices, owing to the excellent electrical, optical, thermal, and mechanical performance. Although enormous progress has been made in preparing two-dimensional (2D) material SCTFs, it is still challenging to grow SCTFs based on 3D materials with high efficiency. Herein, we report the efficient growth of centimeter-scale CdS SCTFs with the thickness of ∼95.41 nm on the mica substrates using a chemical vapor deposition method. The controlled experiments and the structure characterizations indicate that the SCTFs are formed by the seamless coalescence of the hexagonal CdS nanosheet domains initially grown in the same orientation on the substrate, with the epitaxial relationship of (100)CdS//(110)mica and (110)CdS//(200)mica. Importantly, the CdS SCTF-based photodetectors (PDs) demonstrate a photoswitching (Ion/Ioff) ratio up to 105 and a fast photoresponse speed (trise ≈ 0.5 ms, tdecay ≈ 1 ms). Furthermore, the PDs exhibit excellent stability to at least 2 months of storage in an ambient atmosphere and 1000-time bending. This work paves the way to synthesizing the 3D semiconductor SCTFs on a large scale and promotes their practical application in multifunctional photoelectric devices.
研究领域:
材料科学
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半导体物理
·
光电技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ming Wang,Mengxin Li,Mengyao Rong,Jiawang Li,Peng Li,Yingfei Hou
The need for accurate separation of Mg 2+ /Li + in the Salt Lake lithium extraction process puts high demands on the structure of nanofiltration (NF) membranes. The traditional heat treatment intensified NF membrane exhibits a typical gradient cross-linking structure and an internal nanoscale inhomogeneity, which makes it difficult to accurately separate mono/divalent ions. In this paper, the mild constant temperature UV (CTUV) irradiation process is innovatively applied to intensify the interfacial polymerization (IP) process instead of the classical elevated temperature heat treatment. The relative constant temperature of the CTUV irradiation process restrains the diffusion of remaining monomers and alleviates the further cross-linking in the backside of the polyamide (PA) separation layer, which contributes to a uniform cross-linking structure and an internal nanoscale homogeneity. The restrained monomers’ diffusion and the wetting of the substrate inhibit the PA intrusion into the substrate pores and the constant temperature process avoids shrinkage of the membrane pores effectively, which jointly reduces the permeation resistance of the NF membrane. Consequently, the prepared optimal piperazine-based NF membrane exhibits a high Li + /Mg 2+ selectivity of 29.1 and a desirable water permeance of 8.5 L·m −2 ·h −1 ·bar −1 , which are 2.3 and 1.7 times than those of the heat-treament NF membranes, respectively. In comparison to heat treatment process, the CTUV irradiation strategy presents an effective, scalable and energy-saving route to develop NF membranes with high cation separation performance. What’s more, the CTUV treatment strategy is also adaptable to other monomers, such as m-phenylenediamine (MPD), polyethyleneimine (PEI) and 1, 4, 7, 10-Tetraazacyclododecane (Cyclen), manifesting its superior universality. This work showcases a novel perspective to achieve high permeance and ideal selectivity relying on the modulation of internal nanoscale structures.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 18
·6987-6997
·
IF 6.482
Juli Liang,Wenwei Wu,Yang Chao,Yilong Li,Junfei Wu,Yulu Xie,Xuehang Wu
Although sodium (Na) metal is a promising anode material for high-energy Na batteries, it is still difficult for it to achieve a long lifespan due to dendrite growth and an unfavorable solid electrolyte interphase (SEI) with sluggish ion transport kinetics. Herein, a facile and mild hydrothermal method is developed to grow vertically aligned ZnO nanosheets on Ni foam, which effectively facilitates uniform thermal infusion and confinement of Na within the three-dimensional (3D) host. In virtue of the large surface area of NF, the local current density can be effectively lowered, which is conductive to uniform Na deposition. More importantly, the products obtained by the reaction between ZnO and Na metal during thermal infusion of Na affect the decomposition of electrolyte, leading to the formation of SEI film with enhanced Na-ion transport property. Electrochemical studies show that the resultant Na-metal/Zn-modified Ni foam composite (Na–Zn-NF) anode can stably cycle for more than 2000 and 550 h at a current density of 1 and 3 mA cm−2 in symmetric cells, respectively. When assembled into full cells against NaTi2(PO4)3/C (NTP/C) and Na4Fe3(PO4)2(P2O7)/C (NFPP/C) cathodes, the Na–Zn-NF anode also exhibits excellent cycling stability and stable Coulombic efficiencies. This work provides an effective strategy for simultaneously achieving the enhancement of the surface sodiophilicity of 3D hosts and the optimization of an electrode/electrolyte interphase for stable Na metal anodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）