CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Peng-Xing Xie,Qing-Yuan Zhao,Haojie Dong,Tao Long,Meng-Sha Ding,Bin Xie,Xiao-Feng Wang,Wei Ling,Mengting Liu,Xiong-Wei Wu,Peng-Fei Wang,Xian-Xiang Zeng
Delivery of high energy density in polyanion compound-Na 3 V 2 (PO 4 ) 3 based on three-electron redox is still challenging because of their controversial multi-electron reaction mechanism and unsatisfactory electrochemical reversibility. Herein, the reversible V 4+ /V 5+ redox ( ca. 4.0 V) could be successfully activated in Na 4 VFe(PO 4 ) 3 cathode material through a Na-rich strategy, demonstrating a reversible specific capacity of 154.7mAh g −1 at 0.1C and 90.3mAh g −1 after 800 cycles at 20C, with 80 % of the initial capacity retained. The entire electrochemical reaction undergoes a highly recoverable phase transition by in-situ X-ray diffraction. Impressively, the Na-rich strategy could not only allow Na2 site to be occupied to activate the V 4+ /V 5+ redox pair confirmed by X-ray absorption near-edge structure spectroscopy, but also enable Na + transportation across the generated vacancies rather than synergistic Na + diffusion. This work provides rational design strategy of multi-electron transfer reaction in high-energy sodium-ion batteries.
研究领域:
材料科学
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电化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Min Yang,Yong Zheng,Weimin Ding,Xuepeng Lu,Lan Wang,Zhiyi Jiang,Bo Li,Zuowei Dong
This study addresses the challenge posed by the high sintering temperature (>850 °C) required for current high-performance BaZnP 2 O 7 -based ceramics by investigating the substitution of V 5+ at the P-site in BaZnP 2 O 7 ceramic. The objective was to lower the sintering temperature to below 850 °C while preserving the high-quality characteristics of the ceramics. Results reveal that the solubility of V 5+ in BaZnP 2 O 7 ceramics is limited, and secondary phases such as BaZn 2 (PO 4 ) 2 and Ba 3 V 2 O 3 (PO 4 ) 3 were formed when the concentration of V 5+ exceeds 0.005. The substitution of V 5+ for P 5+ effectively reduces the sintering temperature of BaZnP 2 O 7 ceramics from 840 (at x = 0) to 680 °C (at x = 0.10). The dielectric constant ( ε r ) of BaZn(P 1- x V x ) 2 O 7 ceramics is primarily influenced by porosity and the presence of secondary phases. The losses due to anharmonic vibrations in BaZn(P 1- x V x ) 2 O 7 ceramics were effectively reduced, leading to an increase in Q × f to ∼70,000 GHz at x = 0.005. The temperature coefficient of resonant frequency ( τ f ) is mainly affected by bond energy ( E ) and the content of the Ba 3 V 2 O 3 (PO 4 ) 3 phase. Ultimately, the BaZn(P 0.995 V 0.005 ) 2 O 7 ceramic sintered at 820 °C for 4 h exhibited the optimal microwave dielectric properties: ε r = 8.24, Q × f = 75,419 GHz, and τ f = −34.76 ppm/°C.
研究领域:
材料科学
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陶瓷工程
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电子材料
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 33
·期 2
·1054-1062
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IF 2.478
Cao Xuefeng,He Qiuwei,Liu Caige,Liu Laijun,Li Chunchun
Compositional modification engineering was designed to simultaneously reduce the sintering temperature and improve the dielectric properties of BaTa 2 V 2 O 11 via in-situ adjusting the V 5+ /Ta 5+ molar ratio. A series of BaTa 2- x V 2+ x O 11 ceramics, fabricated by a solid-state reaction method, were characterized for structural evolution and dielectric properties variations. In-situ adjusting V 5+ /Ta 5+ molar ratio significantly lowered the sintering temperature of BaTa 2 V 2 O 11 and prominently improved the temperature stability of resonance frequency which is explained by the dielectric dilution theory. Competitive microwave dielectric properties with ε r = 11.5–25.9, Q × f = 22,172–42,660 GHz, and τ f = 42.4–74.6 ppm/ºC were achieved in the BaTa 2- x V 2+ x O 11 ceramics sintered at 620–840 oC. All the results indicate that the molar ratio of V 5+ is primarily responsible for improving the densification behavior and dielectric characteristics of BaTa 2- x V 2+ x O 11 , which in turn increases the appropriateness in further practical applications.
研究领域:
材料科学
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陶瓷工程
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电子材料
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Yuxiang Chen,Xiangyue Liao,Peng Wang,Ji Chen,Xiaoqin Zhang,Xingqiao Wu,Sean C. Smith,Dunmin Lin,Xin Tan,Qiaoji Zheng
The stable three-dimensional framework and high operating voltage of sodium superionic conductor (NASICON)-type Na 3 V 2 (PO 4 ) 3 has the potential to work with long cycle life and high-rate performance; however, it suffers from the poor intrinsic electronic conductivity and low energy density . Herein, Ga 3+ is introduced into Na 3 V 2 (PO 4 ) 3 to activate the V 4+ /V 5+ redox couple at a high potential of 4.0 V for enhancing energy density of the materials (Na 3 V 2-x Ga x (PO 4 ) 3 ). After the partial substitution of Ga 3+ for V 3+ , three redox couples (V 2+ /V 3+ , V 3+ /V 4+ and V 4+ /V 5+ ) of V are reversibly converted in the voltage range of 1.4–4.2 V, suggesting multi-electrons (>2e − ) involved in the reversible reaction, and simultaneously the electronic conductivity of the materials is effectively enhanced. As a result, the cathode with x = 0.75 exhibits excellent electrochemical properties: in the voltage range of 2.2–4.2 V, delivering an initial capacity of 105 mAh/g at 1C with a capacity retention rate of 92.3% after 400 cycles, and providing a stable reversible capacity of 88.3 mAh/g at 40C; and in the voltage range of 1.4–4.2 V, presenting the reversible capacity 152.3 mAh/g at 1C (497.6 Wh kg −1 ), and cycling stably for 1000 cycles at 20C with a capacity decay of 0.02375% per cycle. It is found that the Na 3 V 2-x Ga x (PO 4 ) 3 cathodes possess the sodium storage mechanism of single-phase and bi-phase reactions. This investigation presents a useful strategy to enhance the energy density and cycling life of NASICON-structured polyanionic phosphates by activating high-potential V 4+ /V 5+ redox couple.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2022
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IF 10.753
Dan Zhou,Mengmeng Liang,Yonglian Xia,Chao Li,Mingzheng Huang,Shuming Peng,Yi Huang
Extracellular polymeric substances (EPS) are high-molecular polymers secreted by microbes and play essential roles in metallic biogeochemical cycling. Previous studies demonstrated the reducing capacity of the functional groups on EPS for metal reduction. However, the roles of different EPS components in vanadium speciation and their responsible reducing substances for vanadium reduction are still unknown. In this study, the EPS of Bacillus sp. PFYN01 was fractionated via ultrafiltration into six components with different kDa (EPS >100 , EPS 100 – 50 , EPS 50 – 30 , EPS 30 – 10 , EPS 10 – 3 , and EPS <3 ). Batch reduction experiments of the intact cells, EPS-free cells, the pristine and fractionated EPS with V 5+ were conducted and characterized. The results demonstrated that the extracellular reduction of V 5+ into V 4+ by EPS was the major reduction process. Among the functional groups in EPS, C=O/C-N of amide in protein/polypeptide and C O of carboxyl in fulvic acid-like substances might act as the reductants for V 5+ , while C O in polysaccharide molecules and P O in phosphodiester played a key role in the adsorption process. The intracellular reduction was via translocating V 5+ into the cells and releasing V 4+ by the intracellular reductases. The reducing capacity of the fractionated EPS followed a sequence of EPS <3 > EPS 10 – 3 > EPS 50 – 30 > EPS 100 – 50 > EPS 30 – 10 > EPS >100 . The small molecules of fulvic acid-like substances and amino acids were responsible for the high reducing capacity of EPS <3 . EPS >100 had the lowest reducing capacity due to its macromolecular structure decreasing the exposure of the reactive sites. In addition to reduction, those intermediate EPS components may also have supporting functions, such as connecting protein skeletons and increasing the specific surface area of EPS. Therefore, the diverse effects of the EPS components cannot be neglected in vanadium biogeochemical cycling.
研究领域:
环境微生物学
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生物地球化学
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水化学
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微生物生态学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Binghao Lin,Xu Wu,Xuejie He,Jiaxin Ye,Yuqin Song,Ping Jiang,Linxuan Bai,Xiangyue Liao,Yangjie Li,Yu Huo,Qiaoji Zheng,Heng Zhang,Dunmin Lin
Na 3 V 2 (PO 4 ) 3 (NVP) with typical NASICON structure is highly regarded as one of the most appealing cathodes for sodium-ion batteries (SIBs) for their excellent structural stability; however, the poor electronic conductivity and irreversible phase transition at high voltage (∼4 V) for the material result in poor rate capabilities and significant capacity degradation during electrochemical reactions. Herein, the high-entropy doping strategy of introducing six types of metal ions into the V-sites in Na 3 V 2 (PO 4 ) 3 is used to design a high-performance cathode of Na 3 V 1.73 (Mn, Ca, Mg, Al, Zr) 0.05 Nb 0.02 (PO 4 ) 3 (HE-NVP) for SIBs. After the high-entropy doping, a reversible V 4+ /V 5+ redox pair is activated at high voltage of ∼4 V, which significantly contributes to the enhancement of energy density and operating voltage. Moreover, after high entropy doping, the single solid solution phase transition in high voltage range is induced, effectively improving the material’s structural stability and exhibiting very small volume change of 1.1 % during the Na + extraction/insertion. Based on the unique advantages mentioned above, the high-entropy HE-NVP exhibits a superior discharge capacity of 122.1 mAh g −1 at a current rate of 0.5C and maintains a remarkable capacity retention of 90.1 % after 500 cycles at a rate of 5C. This work provides a useful reference for designing advanced cathodes for SIBs by regulating high entropy doping.
研究领域:
材料科学
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电化学
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储能技术
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电池技术
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 7
·1554
·
IF 4.2
Haorui Gong,Sai An,Weilong Qin,Yongbo Kuang,Deyu Liu
In order to expand the application of bismuth vanadate (BiVO4) to the field of photoelectrochemistry, researchers have explored the potential of BiVO4in catalyzing or degrading organic substances, potentially presenting a green and eco-friendly solution. A study was conducted to investigate the impact of electrolytes on the photocatalysis of benzyl alcohol by BiVO4. The research discovered that, in an acetonitrile electrolyte (pH 9) with sodium bicarbonate, BiVO4catalyzed benzyl alcohol by introducing saturated V5+. This innovation addressed the issue of benzyl alcohol being susceptible to catalysis in an alkaline setting, as V5+was prone to dissolution in pH 9 on BiVO4. The concern of the photocorrosion of BiVO4was mitigated through two approaches. Firstly, the incorporation of a non-aqueous medium inhibited the formation of active material intermediates, reducing the susceptibility of the electrode surface to photocorrosion. Secondly, the presence of saturated V5+further deterred the leaching of V5+. Concurrently, the production of carbonate radicals by bicarbonate played a vital role in catalyzing benzyl alcohol. The results show that, in this system, BiVO4has the potential to oxidize benzyl alcohol by photocatalysis.
研究领域:
光电化学
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催化
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Xinyang Zhang,Xiaoyu Yang,Yingjun Wei,Dewei Wang,Yuhong Chen
Aqueous zinc–manganese dioxide (Zn–MnO2) batteries hold great promises for large-scale energy storage but face several challenges, such as dendrite formation on the anode and structural instability of the cathode. Herein, we propose an aqueous tellurium–manganese dioxide (Te–MnO2) battery, which employs carbon-supported tellurium (C@Te) to replace the Zn metal anode coupled with vanadium-doped MnO2 (Mn1−xVxO2) cathode, as an alternative to overcome the intrinsic limitations of conventional Zn–MnO2 batteries. Notably, Mn1−xVxO2 can be produced through a room-temperature redox method, enabling effective V5+ ion doping in various α-, β-, γ-, and δ-MnO2 polymorphs. The resulting Mn1−xVxO2 exhibits enhanced structural stability due to the suppressed Jahn–Teller distortion and improved electronic conductivity resulting from V 3d/O 2p orbital hybridization. Consequently, the Mn1−xVxO2 cathode delivers a high specific capacity of 323.7 mAh g−1 at 0.1 A g−1 and 93.5% capacity retention after 1000 cycles at 0.5 A g−1, which significantly surpass those of the pristine MnO2 (P-MnO2). Mechanistic investigations and theoretical calculations further unveil a synergistic mechanism involving enhanced electron transport, optimized ion adsorption, and improved structural stability, demonstrating that V5+ doping promotes reversible H+/Zn2+ co-intercalation. Our study shows that Te–MnO2 batteries can offer a viable alternative to conventional Zn–MnO2 batteries and afford a universal synthesis strategy for Mn1−xVxO2.
研究领域:
储能
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材料科学
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电化学
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电池技术
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产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2026
·
IF 5.8
Yuran Yang,Gongwen Gan,Yue Cheng,Kui Liu
A phase-assisted densification mechanism induced by V 5+ substitution is identified. • Secondary phase formation significantly reduces the sintering temperature by 100 °C. • Dielectric loss is dominated by phonon damping rather than lattice energy • Optimal Q×f is achieved through minimized Raman FWHM and reduced phonon scattering. • Improved τ f originates from reduced Nb/VO 6 octahedral distortion. Microwave dielectric ceramics with low ε r , high Q×f, and near-zero τ f are essential for advanced wireless communication systems. In this work, Li 3 Mg 4 Nb 1- x V x O 8 (0.00 ≤ x ≤ 0.10) ceramics were synthesized, and the effects of V 5+ substitution on phase evolution, sintering behavior, and dielectric properties were systematically investigated. V 5+ doping induces the formation of a Mg 4 (Nb/V) 2 O 9 secondary phase, enabling a phase-assisted densification mechanism that reduces the optimal sintering temperature from 1175 °C to 1075 °C. The optimal composition ( x = 0.02) exhibits ε r = 13.65 and Q×f = 121,296 GHz. Raman and chemical bond analyses reveal that dielectric loss is primarily governed by phonon damping behavior, with the minimum Raman peak width corresponding to the highest Q×f . In contrast, lattice energy shows no direct correlation with dielectric loss. The improved τ f is attributed to reduced Nb/VO 6 octahedral distortion. These results demonstrate that synergistic regulation of phase evolution and lattice vibration provides an effective strategy for optimizing microwave dielectric performance. Download: Download high-res image (187KB) Download: Download full-size image
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Bin Xu,Peng Dong,Jianguo Duan,Ding Wang,Xuesong Huang,Yingjie Zhang
The wide usage of LiFePO 4 batteries makes their recovery and recycling urgent. Here, a novel, efficient and environmentally friendly recycling process has been developed to recover high performance LiFePO 4 nano composites from spent LiFePO 4 materials. The process comprises an intensive mechanochemical activation through mixing with precursor mixture and one-step solid state heat treatment. Spent LiFePO 4 , V 2 O 5 , Li 2 CO 3 , and NH 4 H 2 PO 4 are mixed according to the molar ratio of 1-xLiFePO 4 @xLi 3 V 2 (PO 4 ) 3 (x = 0, 0.005, 0.01, 0.03 and 0.1). In the typical process, the decomposition of self-contained binder and the conductive carbon provide a reducing environment as well as an in-situ coating carbon source. The SEM, XRD and XPS results illustrate that V 5+ is doped in the Fe 2+ site when x < 0.01, with co-existence of V 5+ doping and Li 3 V 2 (PO 4 ) 3 when x ≥ 0.03. Sole V 5+ doping assisted in-situ carbon coating displays the best electrochemical performance. The optimized sample shows discharge capacities of 154.3 mA h g −1 and 142.6 mA h g −1 at 0.1 and 1 C rates, respectively, with a high capacity retention of nearly ∼100% after 100 cycles. All results indicate that intensive mechanochemical activation assisted V 5+ doping is a promising strategy for spent LiFePO 4 recycling.
研究领域:
材料科学
·
环境科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Xiao Liu,Tingyi Liu,Peng Wang
Vanadium is considered to be a harmful industrial pollutant that poses a serious threat to health. In this study, the effect of ultrasonic-enhanced ball milling zero-valent iron removal of vanadium in wastewater was investigated and the basic mechanism of this process was elucidated. The results of the study confirmed that the ultrasonic intervention significantly accelerated the vanadium removal rate and greatly shortened the time required to achieve equilibrium. Under certain experimental conditions, the removal efficiency of vanadium under ultrasonic conditions is 99.1 %, which is 1.4 times higher than that of the traditional constant-temperature water bath device (70.86 %). Analytical techniques such as electron paramagnetic resonance (EPR) and ultraviolet (UV) spectroscopy have confirmed that ultrasonic-induced cavitation and microjet phenomena actively stimulate the formation of more H radicals and Fe 2+ . The key role of Fe 2+ in the removal reaction was further explored and confirmed by a quenching experiment. Through fitting the experimental data of different isothermal adsorption models and reaction kinetics, it is concluded that the adsorption process conforms to the pseudo-second-order kinetics and the Langmuir isothermal model. The adsorption process is dominated by chemisorption , and the maximum adsorption capacity is 153.033 mg·g −1 . X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and other analyses show that under the action of ultrasonic waves, V 5+ is rapidly reduced to its lower oxidation state through reduction within the first 10 min of the reaction. Secondly, as the reaction progresses and the pH value increases, electrostatic adsorption and coprecipitation are involved in the removal reaction.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2014
·
IF 3.674
Xiuquan Jia,Jiping Ma,Min Wang,Zhongtian Du,Fang Lu,Feng Wang,Jie Xu
The promoted effect of Cu(NO 3 ) 2 on aerobic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF) catalyzed by VOSO 4 in acetonitrile was intensively investigated. It was revealed that Cu(NO 3 ) 2 facilitated the activation of VOSO 4 to generate active V 5+ species via the generation of NO x gas. The high DFF selectivity is ascribed to Cu 2+ cation which can effectively prohibit oxidative C C bond cleavage reaction of HMF and prevent radical reaction of DFF to humins. In addition, the polarity of solvent plays a great role on high selectivity of DFF.
研究领域:
催化
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化学工程
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有机化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）