CURRENT APPLIED PHYSICS
·
2023
·
IF 2.4
WenXin Zhang,Hao Li,Haofei Cong,Ruifu Zhou,Yuanbin Qin,Peilong Xu,Xuhai Liu,Fengyun Wang
One-dimensional wide band-gap metal oxide semiconductors demonstrate enormous potential in high-performance ultraviolet photodetectors. Here, via tuned zinc oxide (ZnO) concentration ratio and heterojunction structure as well as decent V TH value, we electrospun tin zinc oxide (SnZnO X ) nanowires for photoelectronic conversion function. The constructed optimized photodetectors based on Sn 8 Zn 2 O X nanowires can exhibit a remarkable detectivity of 1.77 × 10 16 Jones, excellent responsivity of 2.23 × 10 3 A/W and relative high sensitivity over 10 4 . In addition to the excellent photodetection performance, Sn 8 Zn 2 O X nanowire devices exhibit nonvolatile memory effect , which can maintain the light-induced low resistance state at 5 V without light. Moreover, a voltage of 30 V was applied to Sn 8 Zn 2 O X nanowires devices to realize light-writing state switching to bias-erasing state, and the device could come back to their initial high resistance state. These results indicate SnZnO X nanowires devices possess a tremendous potential in the circuit design of the artificial visual system.
研究领域:
材料科学
·
纳米电子学
·
光电子学
·
半导体器件
·
人工视觉系统
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2024
·Vol. 35
·期 5
·e6421
·
IF 3.1
Ya-Jing Cao,Xue-Jie Gai,Wei Li,Hai-Hui Liu,Na Han,Xing-Xiang Zhang
Artificial muscles have attracted great attention as actuators and coiled and twisted monofilament actuators are considered the most promising ones. In the present work, the torsional properties of poly(hexamethylene adipamide) (PA66), poly(ethylene terephthalate) (PET), and high-strength PET (HTPET) monofilaments were investigated. Furthermore, cross-linked PET (CPET) monofilaments were melt-spun by adding 1 wt% of 2-dimethoxy-2-phenylacetophenone (ultraviolet (UV) initiator) and triallyl iso-cyanurate (cross-linking agent) in PET chips under UV radiation. The HTPET monofilaments had the highest torsional modulus of 1.1 GPa followed by the PET (0.8 GPa) and PA66 (0.6 GPa) monofilaments. Subsequently, the HTPET monofilaments were subjected to heat treatments under tension. When the heat treatment time was 10 min, the mechanical properties of the HTPET monofilaments also tended to first increase and then decrease with the rise of heat treatment temperature. The molecular arrangement and crystal structure of the HTPET monofilaments were gradually improved with the prolongation of tension heat treatment. The tensile strength and initial modulus of the HTPET monofilaments were 871.4 MPa and 15.8 GPa, respectively. The mechanical properties of the CPET monofilaments first increased and then decreased with the increase of the drawing ratio. When the drawing ratio was 10, the CPET monofilament had a tensile strength of 717.2 MPa, an initial modulus of 16.7 GPa, and a maximum torsional modulus of 1.3 GPa. Therefore, both heat treatment and cross-linking increased the mechanical strength of the PET monofilaments. CPET and HTPET are possible to be used as artificial muscles.
研究领域:
材料科学
·
高分子物理
·
纺织工程
·
生物医学工程
·
智能材料
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2022
·
IF 3.699
Tayfun Kocak,Xiadong Qi,Xiaogang Zhang
The extended cyclability of LiNi 0.5 Mn 1.5 O 4 (LNMO) electrodes featuring different water-based binders is here reported. LNMO electrodes with guar gum (GG) binders show a relatively stable cycle performance at 0 °C and room temperature. However, water-based binders exhibit higher capacity fade than those with polyvinylidene fluoride (PVdF) binder at 50 °C. Although PVdF binder has a lower adhesion force than CMC and GG; PVdF-based electrodes exhibit better capacity retention than those with water-based binders at 50 °C over 1000 cycles. Finally, operando Differential Electrochemical Mass Spectrometry (DEMS) experiments were carried out to analyze the evolution of volatile decomposition products formed over cycling at 1C and 30 °C of CMC-, GG- and PVdF-based LNMO electrodes. CO 2 and H 2 gas evolutions increase remarkably at both high temperatures and high potentials, i.e., ~ 4.7 V.
研究领域:
电化学
·
材料科学
·
能源存储
·
锂离子电池
·
电极材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 50
·期 14
·25541-25547
·
IF 5.1
Hang Zhang,Ahsan Nawaz,Feiyu Huang,Zhiping Zhang,Hongfei Liu
Orthorhombic In 0.5 Sc 1.5 Mo 3 O 12 thin films have been synthesized using the sol-gel spin coating . Influences of post-annealing temperatures on crystal structure, morphology, negative thermal expansion (NTE) and optical performances of the thin films were studied using XRD , SEM, XPS, high-temperature XRD and UV–Vis–NIR spectrophotometer. XRD and SEM results show that as-prepared thin film is in an amorphous state with a smooth and dense surface. Orthorhombic In 0.5 Sc 1.5 Mo 3 O 12 thin films were obtained after post-annealing in 550–750 °C. The higher the annealing temperature in 550–750 °C, the better the crystallinity of orthorhombic In 0.5 Sc 1.5 Mo 3 O 12 thin films . In addition, the grain size of the In 0.5 Sc 1.5 Mo 3 O 12 thin film also grows as the annealing temperature increases. The resulting orthorhombic In 0.5 Sc 1.5 Mo 3 O 12 thin films exhibit anisotropic NTE. Its volumetric coefficient of thermal expansion (CTE) is −3.44 × 10 −6 °C −1 , while the CTEs in a -, b - and c -axis directions are −4.70 × 10 −6 °C −1 , 5.37 × 10 −6 °C −1 , and -4.10 × 10 −6 °C −1 in 25–700 °C, respectively. In addition, the transmittance of orthorhombic In 0.5 Sc 1.5 Mo 3 O 12 thin films post-annealed at 750 °C is around 87.75 %–95.03 %.
研究领域:
材料科学
·
无机非金属材料
·
功能薄膜
·
热膨胀调控
·
光学材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Erying Zhao,Zonglei Guo,Jie Liu,Qian Zhang,Ziyang Guo,Yu Yang,Hui Wang,Lei Wang
High-energy-density Li-ion batteries are urgently demanded in the development of electric vehicles and smart power grids. Owing to the high theoretical capacity, silicon (Si) has been considered as one of the most promising anode materials for next-generation Li-ion batteries. However, Si anode materials undergo huge volume change during charge and discharge processes, which severely impairs the cycle stability of Si anodes. Herein, to stabilize the Si anodes, a low-cost and eco-friendly network binder coupling hardness with softness was designed through in-situ cross-linking of guar gum (GG) and carboxylated acrylonitrile-butadiene rubber (XNBR). The rigid and high-viscosity GG functions as a skeleton to withstand the expansion of Si active materials, and the elastic XNBR can effectively buffer the residual stress. The mass ratio of GG and XNBR was systematically studied to achieve superior cycling stability of Si anodes. Especially, the Si@X4G6 electrode shows excellent cycle stability, remaining a capacity of 1929 mAh g − 1 at 1000 mA g − 1 after 100 cycles. Interestingly, such an effective strategy not only works well in Si anodes but also does well in Si/C anodes and LiFePO 4 cathodes.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
纳米材料
✓ 已验证
DOI
高影响因子
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
·
2019
·Vol. 70
·期 6
·1044-1055
·
IF 1.458
Junwei Sheng,Xixun Shen,Yaxue Wang,Qunjie Xu,Xiaoxue Zhang
In this paper, the pure Zn coating and Zn-TiN composite coatings containing four different concentrations of TiN particles were prepared on the carbon steel by direct current electrodeposition. The X-ray diffraction and scanning electron microscopy were used to study the crystal size, preferred orientation, and surface morphology of these coatings. The results show that the incorporation of TiN particles refines the crystal size of the Zn coating and results in the formation of a special surface morphology with papillary-shaped clusters structure that preferentially grows along the (100) crystallographic plane. Such a surface provides better hydrophobicity for the Zn-TiN composite coatings. The corrosion behavior of these coatings was evaluated by potentiodynamic polarization, electrochemical impedance spectroscopy and the long-term immersion test. The results show that the incorporation of TiN nanoparticles leads to a significant increase in corrosion resistance of the Zn coating and there is an optimal addition of TiN nanoparticles to provide a best corrosion resistance for the composite coatings. Additionally, the microhardness of prepared coatings was also evaluated.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
·
金属功能涂层
·
电化学
✓ 已验证
DOI
高影响因子
VACUUM
·
2023
·
IF 4
Rui Yang,Xiangfeng Guo,Khaled Tawfik Alali,Kun Song,Lihua Jia,Tongle Ge,Xiaoshuang Chen,Dalei Song,Xuefeng Bai,Jun Wang
The construction of effective nano-microstructures electrode has been a tireless pursuit in the energy storage field. Herein, Controllable construction of diversified morphologies NiCo 2 O 4 nanomaterials by tuning the dielectric constant and viscosity of the mixed solvent. We employed different solvent compositions as deionized water (DI), DI:Ethanol (1:1), DI: Isopropanol (1:1), DI: Propylene glycol (1:1), DI: Butanediol (1:1). In mixed aqueous solvents with low dielectric constants of ethanol and isopropanol, metal ions diffuse well and the nanomaterials tend to construct sheet-like nanostructures whereas high viscosity of the propylene glycol and butanediol solution will slow down the rate of metal ion diffusion, which only grow uni-directionally to form rod-like nanostructures. The formed ear-shaped NiCo 2 O 4 nanostructures in V propylene glycol : V H2O = 1 : 1 mixed solvent have a large specific surface area and provide more electrochemically active sites, which facilitates effectively access electrolytes and thus accelerates the redox reaction rate. The resulting NiCo 2 O 4 nanoears exhibits favorable capacity of 251 mAh g −1 and excellent rate performance with a 73.0% capacity retention at 20 A g −1 . More importantly, the asymmetric supercapacitors assembled with the preferred NiCo 2 O 4 nanoears and active carbon (AC) reveal excellent electrochemical performance at operating potential of 1.6 V, great specific capacity (58.0 mAh g −1 ), energy and power density of 46.4 Wh kg −1 at 801 W kg −1 and a specific capacity retention rate of 90.7% after 5000 cycles. This work provides a new perspective for the controllable construction of new micro-nanostructure materials.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
·
功能材料
·
电化学能量储存
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 16
·13925-13930
·
IF 2.324
Li Tianjing,Shi Qingle
In this paper, explain a new relationships between Bi 3+ content, the phase crystal, microstructure and conductivity for Sm and Bi co-doped Ce 0.8− x Sm 0.2 Bi x O 1.9−1/2 x ( x = 0, 0.05, 0.1, 0.15, 0.2) electrolytes prepared by co-precipitation method. The XRD patterns showed that this compounds exhibit a fluorite-type cubic structure after the samples calcined at 700 °C for 4 h and the cell volumes of increased when the Bi content increased. In addition, for the samples sintered at 1400 °C for 4 h, the Bi doping improves the relative density, the grain size and the average thermal expansion coefficient (TEC). More in details, the relative density and TEC increase with the Bi content. Form the AC impedance spectroscopy measurements, the conductivity of the sintered samples is found to improve with the increasing of Bi content (for x ≤ 0.15), which is ascribed to the increasing of the number of oxygen ion vacancies and the increase in the unit cell volume. However, the conductivity decreases when the Bi content is further increased (0.15 < x ≤ 0.2), which is ascribed the reduction of the number of free oxygen vacancies. The highest conductivity at 800 °C is 5.6 × 10 −2 S/cm and the activation energy is 0.83 eV for Ce 0.65 Sm 0.2 Bi 0.15 O 1.825 , indicating that this would be a promising electrolyte for the intermediate temperature-solid oxide fuel cell applications.
研究领域:
材料科学
·
无机非金属材料
·
固态离子学
·
能源材料
·
燃料电池
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 41
·15990-15995
·
IF 4.569
Jianlong Huang,Chengfa Wu,Jianbang Chen,Zhiyong Guo,Wenjuan Ma,Feng Yu,Bin Dai
A new rare-earth borate Na3YB8O15 was fabricated by the flux method. The compound crystallizes in the P group, and shows a three-dimensional network built by [B8O17] fundamental building blocks (FBBs) with [NaO6], [NaO7], and [YO7] polyhedra. The [B8O17] FBBs are composed of five planar BO3 and three BO4 tetrahedra and connected via corner-sharing to construct a unique one-dimensional (1D) [B8O15]∞ infinity chain that is observed for the first time in the Na2O–Y2O3–B2O3 system compound, enriching the structural diversity of rare-earth borate. The title compound exhibits a short ultraviolet (UV) cutoff edge of ∼195 nm and a wide experimental band gap of 5.50 eV. DFT calculations indicate that Na3YB8O15 is a direct band gap compound with a calculated GGA band gap of 5.14 eV, and the band gap is mainly determined by B 2p and O 2p orbitals. The results update the phase diagram of Na2O–Y2O3–B2O3 and enrich the diversity of rare-earth metal borates.
研究领域:
无机化学
·
材料科学
·
固体化学
·
光电功能材料
·
晶体工程
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2022
·Vol. 50
·期 7
·100101
·
IF 1.193
Ranehipura Dewage Lahiru SANDARUWAN,Bo-Yu WANG,Suwanda Arachchige Don Rumesh MADHUSANKA,Shun-Chao MA,Hong-Yu WANG
Transition to aqueous electrode fabrication of lithium ion batteries (LIBs) with green binder is certainly profitable and imperative in terms of economic benefit and environmental wellness. However, aqueous processing of cathode in LIB, especially the ternary LiNi x Co y Mn z O 2 (NCM), is still problematic and novel water-soluble binder should be developed to boost the electrochemical performances of cathode. In this regard, commercially available white latex (WL), cooperating with CMC (carboxymethyl cellulose), is employed as water-processable binder mixture for manufacturing NCM cathode. Interestingly, the prepared NCM cathode assisted by WL/CMC mixture exhibits improved electrochemical performances including better initial reversible capacity of 161.7 mAh g −1 at 0.5 C current density, long-term cyclability with a reversible capacity of 155 mAh g −1 along with high-capacity retention of around 96% after cycling 200 times, and even excellent rate capability, which are superior to those of the conventional counterpart base on polyvinylidene fluoride (PVdF). Moreover, the NCM|graphite full cell, which is absolutely based on this novel WL binder, also demonstrates the outstanding electrochemical behaviors.
研究领域:
电化学
·
能源材料
·
锂电池技术
·
高分子材料科学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2021
·Vol. 306
·期 11
·2100456
·
IF 4.367
Zhiqiang Wu,Qiang Guo,Yang Liu,Huihui Zhou,Hua Zheng,Xingfeng Lei,Lei Gong,Yanhui Chen,Zhenguo Liu,Qiuyu Zhang
In order to meet the requirements of polymer dielectric materials for high thermal stability and excellent dielectric properties in the application of high-temperature film capacitors, a series of polyimide (PI) films are fabricated by introducing a self-synthesized aniline trimer (ACAT) with a conjugated structure in this work. Since the conjugated ACAT in the main chains of PI improves the electron polarization and carrier mobility of the PI molecular chains, the dielectric constant of the ACAT-PI films is greatly enhanced (4.4–7.4). Meanwhile, the dissipation factor does not increase apparently (0.002–0.013). The dielectric properties are stable even when the temperature is up to 200 °C, the thermal degradation temperature is as high as 450 °C, and the mechanical properties are also excellent (70–105 MPa). Among all the films, the PI film with 5 mol% ACAT exhibits the maximal energy density of 3.6 J cm −3 under the field of 426 kV mm −1 , the high tensile strength (90 MPa) and the excellent thermal stability ( T d5 = 515 °C). The work paves the way to prepare high-temperature polymer dielectric film materials with high energy storage density.
研究领域:
材料科学
·
高分子化学
·
介电物理
·
能源材料
·
功能高分子
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 3
·203
·
IF 2.5
Xu Yingying,Xia Siyi,Zhang Yingjiu,Song Hongzhang,Liu Shaohui,Hao Haoshan
In this study, ceramic samples of Bi 2 Sr 2 Co 2 O y + v wt% B 2 O 3 ( v = 0.0, 0.1, 0.2, 0.3, 0.4) were synthesized using the solid state reaction method, and the influence of B 2 O 3 additive on their microstructure and thermoelectric properties were investigated. On one hand, the B 2 O 3 additive acted as a sintering aid, enhancing carrier mobility. On the other hand, B 2 O 3 dispersion served as a nano-second-phase, increasing hetero-interfaces and strengthen phonon scattering, thereby effectively suppressing lattice thermal conductivity. By dual optimization of both electric and thermal transport performance, the Bi 2 Sr 2 Co 2 O y + 0.3 wt% B 2 O 3 sample achieved a high ZT value (thermoelectric figure of merit) of 0.31 at 923 K, which was improved by approximately 33% compared with the pristine Bi 2 Sr 2 Co 2 O y sample.
研究领域:
材料科学
·
凝聚态物理
·
无机非金属材料
·
热电材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）