Journal of Energy Storage
·
2024
·
IF 8.9
Fangzhao Pang,Yongxin Wu,Xiaowei Liu,Xiang Chen,Lei Guo,Shuaibo Gao,Kaifa Du,Dihua Wang,Huayi Yin
The corrosion of positive grid alloys is important for determining the service life of lead-acid batteries (LABs). Herein, we prepared a series of PbCaSnAl-M (M = Mg, Sr, Ba) alloys by an induction melter and systematically investigated the effect of Mg, Sr and Ba on their microstructures and corrosion resistance. The results show that the average grain size of PbCaSnAl-Mg reduces from 14.56 μm to 11.96 μm, and the average grain size of PbCaSnAl-Sr and PbCaSnAl-Ba increases to 25.95 μm and 39.17 μm, respectively. The addition of Sr and Ba reduces the corrosion rate of PbCaSnAl alloys from 0.366 mg h −1 cm −2 to 0.258 and 0.289 mg h −1 cm −2 , respectively. The increase corrosion resistance is due to the Sr and Ba change the microstructures of the corrosion layer and improve the densification of the corrosion layer.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Hong Zhao,Yuqi Yang,Man Zhou,Lihui Xu,Hong Pan,Qun Yang,Zaisheng Cai
Anti-fog glass can solve the safety problems caused by glass fogging in a wide range of applications. However, its durability is still insufficient under actual application conditions such as high humidity, friction and scratches, et al. Therefore, this work copolymerised hydrophilic chain segments N-hydroxyethyl acrylamide (HEAA) containing -OH and water-resistant -NH-CO-, hydrophobic chain segments butyl acrylate (BA) and a “bridging agent” 4-benzoylphenyl acrylate (BPA) into a trimeric anti-fog coating. And, -OH was introduced to the glass surface by a simple plasma treatment. The BPA was covalently linked with hydrophilic and hydrophobic polymers HEAA/BA through a free-radical polymerisation reaction of double-bonded to form a covalent carbon chain. Meanwhile, it covalently combined with the -OH on the glass surface. BPA formed a stable link between the anti-fog coating and the glass substrate. Thus, the coating was resistant to 400 cycles of sand abrasions and can lift up to 1500 g. The -NH-CO- in HEAA and BA significantly increased the water resistance of the coating which can be immersed in water for 120 h. The -OH in HEAA not only given the coating excellent anti-fogging properties, but also enabled it to self-heal quickly within 10 s. The durable anti-fog coatings prepared in this work have great potential for practical applications.
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
CONSTRUCTION AND BUILDING MATERIALS
·
2023
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IF 7.4
Wei Wang,Xinsheng Li,Junan Shen,Fugen Yuan
Low temperature cracking is one of the main failures of asphalt pavements, specifically in cold areas. The ductility of asphalt binders at low temperature is one of the property indexes that are used to characterize cracking resistance of asphalt binders at low temperature. In order to improve the low temperature ductility of asphalt binders, butyl acrylate (BA) as soft monomer and vinyl acetate (VAc) as hard monomer were used for free radical polymerization, and the BA-VAc polymer was then used as a modifier to modify asphalt binders. The modification scheme was optimized by orthogonal test. The modified asphalt binders were mainly evaluated by ductility test and selected other properties. Atomic force microscopy (AFM) was used to investigate the nano-scaled morphology of modified asphalt binders. The results showed that 1) BA-VAc polymer could greatly improve the ductility of asphalt binders, highly depending on the type of base asphalts for their efficient. 2) The high temperature property of asphalt binder slightly decreased, but the compatibility and storage stability of the modified binders became poorly with the dose of BA-VAc polymer got larger and exceeded 6 %. 3) Ba-VAc polymer reduced the volume and number of “bee-like structures” in the 2D morphgraphic results, and also decreased the surface roughness and stiffness of modified binders. 4) The best performance of modified binders was observed for the modification scheme of a 6 % BA-VAc polymer and BA/VAc being a ratio of 6:4 which is produced at a shear temperature of 130 °C, a shear time of 5 min and a shear rate of 1000 r/min.
研究领域:
材料科学
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土木工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2018
·Vol. 33
·期 16
·2414-2422
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IF 1.495
Youchun Pan,Yuesong Shen,Qijie Jin,Shemin Zhu
A series of Ba-modified MnCeOx/TiO2 catalysts were prepared by a wet impregnation method and tested for selective catalytic reduction (SCR) of NO with NH3 at low temperature. The results showed that Ba additives obviously improved the catalytic performance of the MnCeOx/TiO2 catalyst for NH3-SCR, and the BaMnCeOx/TiO2 catalyst with 3 wt% BaO exhibited the optimal catalytic performance. Moreover, the introduction of Ba also improved the resistances toward water vapor and SO2 of catalysts. The N2 adsorption, H2-TPR, and X-ray photoelectron spectroscopy results showed that the addition of Ba increased the specific surface area, redox properties, and concentrations of surface Mn4+ and chemisorbed oxygen of catalysts. Furthermore, NH3-TPD and NO-TPD were used to investigate the absorption of NH3 and NO on the catalyst. The results revealed that although the introduction of Ba significantly promoted the adsorption of NO, it also inhibited the adsorption of NH3. Consequently, the catalytic performance of MnCeOx/TiO2 was greatly improved with the Ba additives.
研究领域:
催化化学
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环境科学
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2019
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IF 3.019
Na Li,Xuefang Lu,Qun Jing,Ping Wei,Lu Qi,Zhongqi Jiang,Zhaohui Chen
Phosphates are another new family of exploring deep-ultraviolet nonlinear optical materials. As one material, the simpler the composition is the more favorable synthesis and application is. In this work, a simple alkaline earth metal phosphate β -Ba(PO 3 ) 2 was synthesized by high temperature solid phase method. It is worth mentioning that it has short cut-off edge (<190 nm) and relatively large birefringence (Δn = 0.032 @ 1064 nm) in phosphates and the optical anisotropy and birefringence can be enhanced by optimizing the basic anion arrangement. Combining with theoretical analysis, the relationship between structure and performance is further elaborated. In additional, thermal properties, linear optical and nonlinear optical properties for β -Ba(PO 3 ) 2 were also investigated.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 8
·11028-11042
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IF 2.478
Tang Ping,Cao Ming,Yu Jian,Wang Lifang,Zhang Deqin
Bi 1− x Ba x Fe 1− y Cr y O 3 (BBFCO: x = 0, y = 0; x = 0.05, y = 0; x = 0, y = 0.05; x = 0.05, y = 0.05; x = 0.1, y = 0; x = 0, y = 0.1; x = 0.1, y = 0.1; x = 0.2, y = 0) nanoparticles were prepared by a simple cost effective ethylene glycol-based sol–gel technique. The calcination temperature was set at 600 °C for 120 min with a heating rate of 10 °C/min. Effects of Ba, Cr dopant on structural, optical and magnetic properties of BiFeO 3 (BFO) nanoparticles have been studied. Perovskite structure was confirmed by the metal-oxide absorption bands appeared at 559 cm −1 and 438 cm −1 in Fourier-transform infrared spectroscopy spectra, which are the characteristic bands of FeO 6 octahedral groups in perovskite structure. X-ray diffraction patterns confirmed that Barium (Ba) is an effective dopant to suppress the impurity phases in Cr-doped BFO. Phase transitions from rhombohedral to orthorhombic phase in all doped samples were verified by Rietveld refinement and Raman analysis. Rhombohedral, orthorhombic and tetragonal phases coexist in Bi 0.9 Ba 0.1 FeO 3 and Bi 0.8 Ba 0.2 FeO 3 , which can be ascribed to the serious lattice distortion due to high-level Ba doping. Well-crystalline BBFCO nanoparticles were observed and the particle size distribution of all samples was calculated from transmission electron microscope images. Ba–Cr co-doping resulted in a dramatic reduction in the particle size. Optical absorption spectra indicated that the optical bandgaps of the doped samples are about 2.20 eV. Clear hysteresis loops were observed in all doped BFO, which indicate their ferromagnetic order at room temperature. Gradually enhanced ferromagnetic property was realized in Ba-doped BFO. The magnetization (at 20 kOe) of BFO, BFO-5Ba, BFO-10Ba and BFO-20Ba are 0.24, 0.33, 1.00 and 1.25 emu/g, respectively. The remanent magnetization of them are near zero, 0.08, 0.44 and 0.53 emu/g, respectively. Particular shape of wasp-waist hysteresis loops observed in BFO-5Ba, BFO-5Cr and BFO-5BaCr can be ascribed to the coexistence of different magnetic phases, and the mixture of single domain and superparamagnetic particles.
研究领域:
材料科学
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物理学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 37
·17544-17550
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IF 3.591
Zhen Chen,Hao Zeng,Shujuan Han,Zhihua Yang,Shilie Pan
The chlorine barium nitrate Ba(NO3)Cl was synthesized, for the first time to the best of our knowledge, by using a mild hydrothermal method. Its structure was observed to feature an ABW-type topology (BaCl-ABW) framework, which can be considered as stacks of honeycomb-shaped sheets. Also, Ba(NO3)Cl crystals with dimensions of up to 2 × 1 × 0.5 mm3 were grown. Remarkably, Ba(NO3)Cl was found to exhibit a short UV cutoff edge (below 213 nm) and a markedly enhanced birefringence (Δn = 0.178 @ 1064 nm), about 19 times that of its parent phase BaCl2 (Δn = 0.009 @ 1064 nm). Theoretical calculations indicated that the birefringence enhancement mainly derived from the planar [NO3] triangles.
研究领域:
材料科学
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晶体学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Suwei Mou,Kai Huang,Min Guan,Xiang Ma,Jun song Chen,Yong Xiang,Xiaokun Zhang
LiCoO 2 is the dominantly used cathode material in lithium-ion batteries. However, its high-rate capacity and cyclability are limited, especially under high charging voltages, mainly due to the high Li + diffusion barrier . To solve it, we purpose a doping scheme based on two foreign elements: one is with tremendously large ionic radius and weak electronegativity , and the other one has an ionic radius slightly larger than Co, an electronegativity a little weaker than Co, and a high binding energy with O. Ba and Ga are chosen according to this criterion, and their doping effects are compared with that of La and Al. Briefly, Ba is superior to La in weakening the attraction of O 2- to Li + because of its weaker electronegativity and larger ionic radius. Meanwhile, Ga is more capable of enhancing the structural stability at high voltages than Al mainly due to its higher binding energy with O. LiCo 0.998 Ba 0.001 Ga 0.001 O 2 increases Li + diffusivity from 0.77 × 10 -14 to 1.06 × 10 –13 cm 2 ∙s -1 , resulting in a significantly enhanced rate capacity of 114.3 mAh g -1 at 10 C, much better than pristine counterpart (1.6 mAh∙g -1 ). Additionally, it exhibits a particularly high capacity of 199.3 mAh g -1 , and 85% capacity retention over 100 cycles at 0.5 C in 3.0–4.5 V.
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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 17
·1-10
·
IF 2.8
Gong Qinglin,Hu Ming
Bi(Mg 0.5 Hf 0.5 )O 3 (BMH) has been frequently exploited to engineer the material’s phase structure, micromorphology, dielectric, piezoelectric, and energy storage performance of BaTiO 3 (BT)-based ceramics for the optimization of multifunctional dielectrics. Herein, combined with the Ba(Ti 0.8 Sn 0.2 )O 3 relaxor, (1 – x )Ba(Ti 0.8 Sn 0.2 )O 3 – x Bi(Mg 0.5 Hf 0.5 )O 3 (BTS- x BMH) ceramic samples were prepared through a solid-state reaction process. The micromorphology, dielectric properties, ferroelectric properties, and energy storage performance of BTS- x BMH ceramics were engineered by increasing BMH content. The addition of BMH can refine the grain size, increase the relaxation degree, raise the breakdown strength, and facilitate the production of the polar nanoregions in the BTS- x BMH ceramics. Compared to pure BTS, the energy efficiency of BTS-BMH is remarkably enhanced, which originates from the disruption of the ferroelectric long-range order owing to the BMH modification. At the maximum applied field of 100 kV/cm, the largest energy density of W rec = 0.3 J/cm 3 was realized at the composition of x = 0.05. The highest energy efficiency of η = 99% was acquired for x = 0.15 at 110 kV/cm. Moreover, the energy efficiency for x = 0.15 displays good temperature stability. These findings can guide the further optimization design of environmentally friendly BT-based ceramic capacitors for energy storage applications.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Yingqing Zhao,Rui Liu,Christian Marcus Pedersen,Zhenzhou Zhang,Zhaohui Guo,Honghong Chang,Yingxiong Wang,Yan Qiao
Lactic acid (2-hydroxypropionic acid, LA) can be produced from abundant and renewable biomass resources via chemocatalytic processes, which exhibited high potential for meeting its tremendous demand in a wide range of applications. The basic Ba(OH) 2 could efficiently catalyze the conversion of d -glucose into LA. In the present study, by utilizing various NMR techniques including, chemical shift titration, 2D diffusion ordered spectroscopy (DOSY) analysis, heteronuclear singular quantum correlation ( 1 H– 13 C HSQC), the binding sites and catalytic interaction between d -glucose and catalyst were clarified. The experimental results by NMR and electrospray ionization mass spectrometry (ESI–MS) were used to explore the reaction mechanism. Experimental results disclosed that the catalyst, Ba(OH) 2 , may exist in the form of [Ba(OH)(H 2 O) 2 ] + under the reaction condition. The OH – of [Ba(OH)(H 2 O) 2 ] + is attached to the C5-O of d -glucose, and Ba 2+ is connected to the C1-O of d -glucose. Herein, we suppose that Ba(OH) 2 and d -glucose interact and form a complex, d -glucopyranose-[Ba(OH)(D 2 O) 2 ] + . Furthermore, when the reaction was performed in D 2 O, we were surprised to find that LA underwent varying degrees of deuteration. The reaction mechanism, binding sites and deuteration of the product have shed light on the efficient conversion of biomass to LA.
研究领域:
生物化学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 29
·23116-23127
·
IF 2.779
Zhang Yu,Xiao Lei,Peng Sen,Li Qiang,Yi Tulin,Liu Weichun,Sun Yuxin
Ba[(Zn 1- x Mg x ) 1/3 Nb 2/3 ]O 3 ( x = 0 ~ 0.9) ceramics were prepared by the traditional solid-phase reaction sintering method. In this paper, the effects of MgO doping on the shrinkage, density, phase composition, crystal structure, microstructure, and microwave dielectric properties of Ba(Zn 1/3 Nb 2/3 )O 3 (BZN) ceramics were investigated. The phase constituents, crystal structure, and microstructure of the ceramics were studied by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscope (SEM), and energy dispersive spectrometer (EDS). The results showed that Ba(Zn 1/3 Nb 2/3 )O 3 as the main phase, and the secondary phase Ba 5 Nb 4 O 15 was detected with high MgO content ( x > 0.3). However, the appearance of secondary Ba 5 Nb 4 O 15 directly led to the deterioration of the microwave dielectric properties of the samples. Ba[(Zn 1– x Mg x ) 1/3 Nb 2/3 ]O 3 ( x = 0.3) ceramics sintered at 1500 °C for 4 h possessed superior dielectric properties: ε r = 36.31, Q × f = 111,326 GHz, τ f = + 12.1 ppm/°C. Such the ceramics could be used to make dielectric resonators and stable oscillators.
研究领域:
材料科学
·
电子材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Tai-Shen Yang,Jie Wu,Jing Chi,Jin-Chao Cao
To enhance the synergistic catalytic effect of pyramid Mn 3+ and octahedral Mn 4+ dual crystal fields in SmMn 2 O 5 and improve its oxygen reduction reaction (ORR) performance, Ba-doped Sm 1-x Ba x Mn 2 O 5 (x = 0.1–0.5) catalysts were prepared by hydrothermal method. The substitution of partial Sm 3+ in SmMn 2 O 5 by Ba 2+ leads to the increase in the ratios of Mn 4+ /Mn 3+ and surface adsorbed oxygen/lattice oxygen on the surfaces of Sm 1-x Ba x Mn 2 O 5 . The increase in surface adsorbed oxygen content indicates stronger oxygen adsorption capacity, while the increase in Mn 4+ content facilitates synergistic catalysis of the dual crystal fields. Pyramid Mn 3+ acts as the active site to catalyze ORR, while the increase in octahedral Mn 4+ content enhances the catalytic activity of Mn 3+ by reducing the binding energy between Mn 3+ and oxygen-containing intermediates, weakening the Mn 3+ -O bond, and accelerating the decomposition of hydrogen peroxide generated by Mn 3+ during the ORR process. Sm 0.6 Ba 0.4 Mn 2 O 5 exhibits excellent ORR performance owing to the suitable Mn 4+ /Mn 3+ ratio on its surface, the half-wave potential reaches 0.77 V, higher than the 0.72 V of SmMn 2 O 5 , and the diffusion-limited current density increases from 3.50 mA·cm −2 for SmMn 2 O 5 to 5.03 mA·cm −2 . Moreover, the synergistic catalytic mechanism of the dual crystal fields was well discussed.
研究领域:
材料化学
·
电催化
·
能源材料
·
无机功能材料
·
固体化学
✓ 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）