Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 11
·5820-5828
·
IF 7.443
N. Li,S. Liao,Y. Sun,H. W. Song,C. X. Wang
Large volume changes cause a series of complicated problems in alloy-type anodes, such as pulverization, exfoliation and the capacity decay which results. Therefore, solutions for the problems caused by large volume changes in sodium ion battery (SIB) anodes are urgently needed. Herein, we report a novel route to encapsulate Sb2O3/Sb nanoparticles (Sb2O3/Sb-NPs) within a graphene shell nanostructure (Sb2O3/Sb@graphene) via microwave plasma irradiation of Sb(CH3COO)3 and a subsequent graphene growth procedure. The designed structure, Sb2O3/Sb@graphene NPs anchored on carbon sheet networks (CSNs), provides an ultra-thin, flexible graphene shell to accommodate the volume changes of Sb2O3/Sb, and thus demonstrates excellent cycling stability (92.7% of the desodiation capacity was retained after 275 cycles), a long cycle life (more than 330 cycles) and a good rate capability (220.8 mA h g−1 even at 5 A g−1). The stability could be compared to that of commercial graphite in lithium ion batteries.
研究领域:
材料科学
·
储能技术
·
纳米技术
·
电化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hailong Pan,Shijie Yan,Yiyun Zhang,Jialun Du,Xiaoyu Zhang,Pijun Gong,Haitao Wu,Huanrong Tian,Michael Wübbenhorst
A series of Ce 2 [Zr 1- x (A) x ] 3 (MoO 4 ) 9 (A = Sr 1/3 Ta 2/3 , Sr 1/3 Sb 2/3 ; x = 0.02, 0.04, 0.06, 0.08 and 0.10) (abbreviated as CZ 1- x T x and CZ 1- x S x ) microwave dielectric ceramics were studied systematically with respect to microstructures, sintering behaviors, crystal structures, microwave dielectric properties and infrared vibrational modes. Density measurements and scanning electron microscopy (SEM) reveal the dense and homogeneous microstructures. X-ray diffraction (XRD) results confirm the formation of solid solutions belonging to the hexagonal system with a R 3 ‾ c space group, and the lattice volume increases with raising the doping content. Furthermore, the complex chemical bond theory was used to calculate the intrinsic bond parameters, and the correlations between the microwave dielectric properties and intrinsic bond parameters were established. Finally, far infrared (FIR) spectra reveal that the main polarization contribution stems from the absorptions of the phonon oscillations in these two groups of ceramics. Typically, the optimum microwave dielectric properties are achieved for CZ 0.9 T 0.1 and CZ 0.94 S 0.06 ceramics with ε r = 10.24, Q × f = 92,009 GHz (at 9.70 GHz), τ f = −8.84 ppm °C −1 and ε r = 10.40, Q × f = 82,696 GHz (at 9.69 GHz) and τ f = −8.04 ppm °C −1 , respectively. Interestingly, the CZ 0.9 T 0.1 ceramic exhibits the maximum Q × f value in the ion doped Ce 2 Zr 3 (MoO 4 ) 9 ceramics while retaining a good τ f = −8.84 ppm °C −1 .
研究领域:
材料科学
·
陶瓷
·
介电材料
·
固体化学
·
微波工程
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DOI
高影响因子
Energy & Environmental Materials
·
2021
·Vol. 6
·期 2
·e12336
·
IF 15.122
Yaqing Wei,Jun He,Jie Zhang,Mingyang Ou,Yanpeng Guo,Jiajun Chen,Cheng Zeng,Jia Xu,Jiantao Han,Tianyou Zhai,Huiqiao Li
Among the alloying-type anodes, elemental Sb possesses the suitable yet safe plateau, simple lithiation pathway, small voltage polarization, high conductivity, and superior cycle stability. However, challenge is that its intrinsic capacity is rather low (660 mAh g −1 ), <1/6 of silicon. Herein, we propose a seamless integration strategy by merging the voltage and capacity of phosphorus and antimony into a solid solution alloy. Interestingly, the enlistment of P is found greatly enlarge the capacity from 660 to 993 mAh g −1 for such Sb 30 P 30 solid solution, while maintaining a single and stable discharge plateau (~0.79 V) similar to elemental Sb. Various experimental characterizations including XPS, PDF, Raman, and EDS mapping reveal that in such a material the P and Sb atoms have interacted with each other to form a homogenous solid solution alloy, rather than a simple mixing of the two substances. Thus, the Sb 30 P 30 exhibits superior rate performances (807 mAh g −1 at 5000 mA g −1 ) and cyclability (821 mAh g −1 remained after 300 cycles). Furthermore, such Sb 60-x P x alloys can even deliver 621 mAh g −1 at −30°C, which can be served as the alternative anode materials for high-energy and low-temperature batteries. This unique seamless integration strategy based on solid solution chemistry can be easily leveraged to manipulate the capacity of other electrode materials at similar voltage.
研究领域:
材料科学
·
电化学
·
电池技术
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DOI
高影响因子
Small
·
2025
·
IF 12.1
Jie Huang,Kangpeng Jin,Chen Li,Hao Yang,Yiming Zhang,Xiyang Wang,Ming Huang,Zhen-Hua Ge,Liangwei Fu
Maximizing the average figure-of-merit ( ZT avg ) of thermoelectric (TE) materials is crucial for optimizing the module performance. Herein, this work enhances the ZT avg to 1.42 (298–673 K) in a n-type Mg 3 (Sb, Bi) 2 -based material by a stepwise optimization strategy. Specifically, Cr injects electron into Mg 3 Sb 0.8 Bi 1.19 Te 0.01 , which synergistically boosts carrier concentration and forms an electron accumulation layer at the interface. Meanwhile, lattice softening and interfacial scattering suppress lattice thermal conductivity. A peak ZT of 1.72 at 673 K and ZT avg of 1.30 over 298–673 K are achieved for Mg 3 Sb 0.8 Bi 1.19 Te 0.01 –1.5 wt.% Cr. Then, through grain refinement and Se doping instead of Te, a delicate equipoise is reached between the power factor and the electronic thermal conductivity. Eventually, the Mg 3 Sb 0.8 Bi 1.19 Se 0.01 –1.5 wt.% Cr sample obtains an outstanding ZT of ≈1.9 at 573 K and ZT avg of 1.42 over 298–673 K. The integrated two-pair full-Zintl YbZn 2 Sb 2 /Mg 3 (Sb, Bi) 2 module achieves a high conversion efficiency of 10.5% and power density of 0.37 W cm −2 simultaneously under a temperature difference of 370 K. More importantly, this module exhibits excellent thermal stability during a 10-day in situ test. This work provides new ideas for applications of full-Zintl modules to the recovery of waste heat.
研究领域:
材料科学
·
热电学
·
能量转换
·
固体物理
·
可持续能源
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Mingrui Li,Qingqin Ge,Nannan Shi,Ting Wang,Cheng Sun,Yanping Song
Antimony selenosulfide (Sb 2 (S,Se) 3 ) thin films hold significant potential in the photovoltaic field due to their tunable bandgap, high absorption coefficient (>10 5 cm −1 ), earth-abundant, and low-toxicity constituents. However, serious trapped-carrier recombination at deep-defect levels limits their efficient applications. In this sense, it is urgently necessary to address the issues of the defects and enhancing film properties. This study optimizes solution-processed Sb 2 (S,Se) 3 films by adjusting the antimony/sulfur (Sb/S) atomic ratio in precursors and the post-selenization temperature. Results show that an optimal Sb/S atomic ratio of 2/3.55 in precursors improves the crystallinity, enlarges the grain size, and minimizes the antimony-oxygen (Sb-O) impurities; this suppresses the deep-trapped carriers’ non-radiative recombination, and reduces the defect density in the Sb 2 (S,Se) 3 films. Furthermore, it is found that the selenization at an optimal temperature of 350 °C further increases the grain size, broadens the light absorption, and diminishes the deep-level defects, which is clearly revealed by the transient absorption experiments. This dual-parameter optimization strategy may promote the development of the high-performance Sb 2 (S,Se) 3 films towards high-efficiency photovoltaic applications.
研究领域:
材料科学
·
光伏技术
·
薄膜技术
·
半导体缺陷工程
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 6
·期 9
·4341-4354
·
IF 1.5
Zhiqiao He,Chengxiang Huang,Qiong Wang,Zhe Jiang,Jianmeng Chen,Shuang Song
A series of praseodymium modified Ti/SnO 2 -Sb/PbO 2 (Ti/SnO 2 -Sb/PbO 2 -Pr) electrodes were synthesized by doping PbO 2 with praseodymium and the effect of Pr doping on the electrode catalytic activity toward the anodic oxidation of the model dye C.I. Acid Black 194 (AB-194) was examined in aqueous solution. The electrocatalytic activity of a Ti/SnO 2 -Sb/PbO 2 electrode can be greatly improved by adding an appropriate amount of Pr into the PbO 2 layer. Accelerated life tests indicate that Pr doping also dramatically improves the stability of the Ti/SnO 2 -Sb/PbO 2 anode. The introduction of Pr enhanced the formation of oxygen vacancies and surface hydroxyl groups, resulting in better activity and stability of the Ti/SnO 2 -Sb/PbO 2 -Pr electrode. A possible degradation pathway of AB-194 during the anodic oxidation process is proposed based on hydroxyl radical attack of the organic reactant.
研究领域:
电化学
·
环境工程
·
材料科学
·
水处理
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DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2023
·
IF 9.1
Yifen He,Chao Qu,Na Ren,Dawei Liang
ABSTRACT Recently, a novel 2-electron oxygen reduction reaction (ORR) based electro-oxidation (EO) system was developed, which utilizes a H 2 O 2 generation cathode instead of H 2 evolution cathode. A Ti-based Ni-Sb co-doped SnO 2 (Ti/NATO) anode was selected for efficient degradation of refractory organics and O 3 production. The synergistic reaction of O 3 /H 2 O 2 further accelerated the generation of hydroxyl radicals ( • OH) in the ORR-EO system. However, the catalytic activity and long-term effectiveness of the Ti/NATO anode limited the large-scale application of the ORR-EO process. In this study, a blue TiO 2 nanotube array (blue-TiO 2 -NTA) inter-layer was introduced into the fabrication process between the Ti substrate and NATO catalyst layer. Compared to the Ti/NATO anode, the Ti/blue-TiO 2 -NTA/NATO anode achieved higher efficiency of organic removal and O 3 generation. Additionally, the accelerated lifetime of the Ti/blue-TiO 2 -NTA/NATO anode was increased by 7 times compared to the Ti/NATO anode. When combined with CNTs-C/PTFE air cathode in ORR-EO system, all anodic oxidation and O 3 /H 2 O 2 processes achieved higher • OH production. Over 92% of TOC in leachate bio-effluent was effectively eliminated with a relatively low energy cost of 45 kWh/t.
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产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2021
·
IF 9.297
Jingyun Zhao,Zexu Chi,Heng Dong,Changfu Sun,Han Yu,Hongbing Yu
This study explored the depth treatment of desphenly chloridazon (DPC) wastewater by a novel synergetic dual-electrodes electrocatalytic (SDEs) system which consisted of Ni–Sb–SnO 2 /Ti anode (NSSTA) and PEDOT/PSS-CNTs modified activated carbon air diffusion cathode (PP-CNTs AC ADC). NSSTA exhibited an enhanced capability to produce reactive oxygen species (·OH and O 3 ), its O 3 production increased to 6.54 mg/L. PP-CNTs AC ADC was observed to have improved activity of catalyzing oxygen reduction reaction (ORR) with 648.23 mg/L H 2 O 2 generated. Owing to the synergetic effect of O 3 and H 2 O 2 , additional ·OH was obtained in SDEs system through the electro-peroxone reaction. Compared with the single-electrode electrocatalytic (SE) systems, the SDEs system showed superior pesticide degradation performance , higher mineralization current efficiency (MCE) and lower energy consumption (EC). In the SDEs system, the optimal 91.7% of DPC removal efficiency and 90.7% of DPC mineralization efficiency were obtained within 150 min by electrocatalytic oxidation of 17.5 ppm and 25 ppm pesticide wastewater at the current density of 11.94 mA/cm 2 , respectively. The treated water showed reduced acute toxicity than that of the raw wastewater, which suggested that the SDEs system is a promising technology for depth treatment of the pesticide industry effluent with simultaneous decontamination and detoxification realized.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Lu Zhou,Ang Li,Fang Ma,Heping Zhao,Fengxia Deng,Shanshan Pi,Aiqi Tang,Jixian Yang
In this work, we prepared microbial extracellular polymeric substances-coated nano zero valent iron (EPS@nZVI) for Sb(V) removal. Batch adsorption experiments showed that the synthesized EPS@nZVI had superior maximum adsorption capacity (202 mg/g at pH = 5) for Sb(V), much higher than that of bare nZVI especially under nonacidic conditions. The adsorption results fit the pseudo-second-order kinetic model and the Redlich-Peterson model well, implying that the adsorption was more like a chemical adsorption process. The spectral analysis showed that EPS could protect inner Fe 0 from air, preventing nZVI from generating a passivation layer on the surface, and decreasing the concentration of hydroxyl radicals in aqueous environment, which increased the reactivity of nZVI and strengthened the reducibility and adsorbability of nZVI. The coated EPS can improve the reactivity of nZVI instead of inhibiting its electron transfer. Moreover, the electrostatic repulsion between EPS@nZVI and Sb(OH) 6 − was decreased compared to that of bare nZVI after the introduction of EPS. The functional groups of EPS could play a significant role in the reduction adsorption, especially under alkaline conditions where nZVI was passivated. This work proved that EPS@nZVI has great prospects in simultaneously combining the reduction activity of nZVI in water and its stability in air.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Kunlun Yang,Jiasheng Zhou,Zimo Lou,Xurui Zhou,Yuanli Liu,Yizhou Li,Shams Ali Baig,Xinhua Xu
Fe-Mn binary oxides (FMBO) with different Fe/Mn molar ratios were synthesized to investigate the influence of the changed iron oxides forms and the manganese oxide on the removal efficacy of Sb(V) from water under neutral pH. The characterization tests by electron microscopy and X-ray diffraction spectroscopy showed that FMBO gradually changed from granular to aciculiform or fibrous structure and their crystalline degree increased with the decreasing Mn content. The ferric oxides in FMBO transformed from 2-L ferrihydrite-like substance with amorphous state to goethite or lepidocrocite with high crystalline as the amount of added Mn reduced during the preparation. The Sb(V) adsorption rates and capacities of FMBO both decreased and the influence of pH on the Sb(V) removal became greater with the decreasing Mn oxide content. All the results indicated that the addition of Mn could greatly improve the Sb(V) removal performance of FMBO through promoting the formation and preventing the transformation of amorphous ferric oxide in FMBO during the preparation, whose Sb(V) adsorption ability was confirmed to be stronger than that of goethite or lepidocrocite. Further exploration indicated the complexation reaction between Sb(V) and amorphous ferric oxide played a key role in Sb(V) adsorption by FMBO. Meanwhile, FMBO with a Fe/Mn molar ratio of 3:1 (FMBO 3 ) exhibited excellent regeneration performance and the amorphous iron oxide in FMBO 3 gradually transformed into crystalline iron oxide during the consecutive recycling.
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DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 35
·21780-21789
·
IF 3.108
Fuchen Zhang,Qiuxia Wang,Lipeng Wang,Yongping Bai
Herein, poly(ethylene terephthalate-co-isophthalate) (PETI) was synthesized via an ethylene glycol stibium/γ-AlOOH composite catalyst and a study was carried out on the structural changes of the end groups of poly(ethylene terephthalate-co-isophthalate) (PETI). Based on this study, the effect of the structural changes of these end groups on the crystallization and optical properties of polyester has been discussed. Moreover, it was found that after the catalytic reaction, the γ-AlOOH and the carboxyl end groups of PETI generated terminal carboxyl aluminum coordination compounds. The composite catalyst generated alkoxy aluminum and alkoxy stibium. The strong nucleating ability of these new end group structures changed the crystallization properties of the polyester. Moreover, the optical properties of the polyester were affected and as a result, a 90.46% transmittance for PETI was observed.
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
B.L. Zhu,X.J. Cai,C.C. Wang,J. Wu,J.L. Yao,W.Q. Sun
Sb-doped SnO 2 (ATO) films were prepared with different RF powers ( P RF ) under two O 2 flow rates ( F O 2 ) by magnetron sputtering , and then subjected to rapid thermal annealing (RTA) treatment. The effects of P RF , F O 2 , and RTA on the crystallinity, stress, surface morphology , conductive properties, transmittance in visible-light range ( T Vis ), and energy gap ( E g ) of the films were investigated. As the P RF increases, the film crystallinity improves or first improves and then slightly degrades, and the compressive stress decreases. With increasing P RF , the surface changes from textured to granular morphology and from granular to honeycomb-like morphology under two F O 2 , respectively. Meanwhile, the conductive properties first enhance and then degrade, and the T Vis and E g tend to decrease, especially at higher P RF . Basically, the films prepared with higher F O 2 have lower compressive stress, inferior conductive properties, and larger T Vis and E g compared with the films prepared with lower F O 2 . After RTA, the film crystallinity obviously improves, the compressive stress transforms into tensile stress , and the surface morphology has not undergone significant changes. Meanwhile, the conductive properties significantly enhance and E g obviously increases. The T Vis of the films prepared with lower F O 2 can be increased by RTA. The influence mechanisms of the above factors on the structure and optoelectronic properties of the ATO films were explored, and ultimately, the ATO films have the T Vis of 76.35–80.86%, sheet resistance of 51.7–91.9 Ω/sq., and quality factor of 1.03–1.67 × 10 −3 Ω −1 within the optimized P RF range. Polymer-dispersed liquid crystal (PDLC) films were fabricated using optimized performance ATO films as electrodes, and their on-state transmittance, off-state transmittance, threshold electric field, and saturation electric field were 2.08–4.61%, 61.69–68.56%, 0.656–0.796 V/μm, and 1.68–2.108 V/μm, respectively. The current results indicate the potential application of ATO films in PDLC films as electrode.
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高影响因子
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