ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Guangfu Qian,Jinli Chen,Lin Luo,Hao Zhang,Wei Chen,Zhejiang Gao,Shibin Yin,Panagiotis Tsiakaras
Developing high performance bifunctional transition metal catalysts would be significantly beneficial for electrocatalytic oxidation of urea-rich wastewater. Herein, we synthesize a V2O3 nanosheet anchored N-doped-carbon encapsulated Ni heterostructure (Ni@C–V2O3/NF) for the reactions of urea oxidation (UOR) and hydrogen evolution (HER). Electrochemical results indicate that it exhibits small potentials of 1.32, 1.39, and 1.43 V for UOR and low overpotentials of 36, 254, and 355 mV for HER at ±10, ± 500 and ±1000 mA cm–2, respectively. It can work at 100 mA cm–2 for over 72 h as cathode and anode electrode without obvious attenuation, suggesting an outstanding durability. The reason for this behavior could be ascribed to the N-doped-carbon coating structure, the synergetic effects between Ni and V2O3, and the nano/micro nanosheets architecture self-supported on nickel foam. This work could provide a promising, inexpensive, and green method for the degradation of urea-rich wastewater and hydrogen production.
研究领域:
材料科学
·
环境科学
·
电催化
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Kezhong Wu,Zijun Liu,Mengmeng Wu,Bei Ruan,Ruitao Wu,Huawei Zhou,Mingxing Wu
V 2 O 3 @activated carbon (V 2 O 3 @C) composite catalysts with different mass ratios have successfully been fabricated using a facile one-step the reduction of ammonium vanadate (NH 4 VO 3 ) with AC in a high-temperature solid-state reaction. V 2 O 3 @C composites were further served as catalytic materials for counter electrodes (CEs) in encapsulation of dye sensitized solar cells (DSSCs). The morphology and microstructure of each V 2 O 3 @C composite were determined by scanning electron microscopy and X-ray diffraction. Cyclic voltammetry studies revealed that the V 2 O 3 @C composites showed a higher electrocatalytic activity than AC and V 2 O 3 for the reduction of triiodide ions. Electrochemical impedance spectroscopy and Tafel analysis data for the symmetrical cells indicated a lower charge transfer resistance and higher exchange current density for V 2 O 3 @C composite than AC and V 2 O 3 . The experimental results showed that power conversion efficiencies (PCE) of 4.94, 5.55 and 5.32% were obtained for AC:NH 4 VO 3 mass ratios of 1:3, 2:3 and 4:3 as counter electrode toward the reduction of I 3 − /I − ions respectively, which were superior to higher than that of AC (2.10%) and V 2 O 3 (3.33%) electrode under the same conditions. The enhanced electrode performance can be ascribed to the combined effects of the relatively larger surface area and higher conductivity of V 2 O 3 @C composite catalysts.
研究领域:
材料科学
·
电化学
·
可再生能源
·
太阳能电池
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xizi Wu,Zhixiang Zhai,Jia Wu,Kexin Tan,Zhili Li,Shibin Yin
5-Hydroxymethylfurfural electrooxidation reaction (HMFOR) has attracted increasing attention due to energy conservation and value-added production. It is crucial to design highly active catalysts with fast kinetics and reveal the catalytic mechanism. Herein, the activation of hydroxymethyl/aldehyde groups is tuned on V 2 O 3 -modificated CuCo for efficient HMFOR. Experimental and theoretical results reveal that strong electron transfer occurs on the heterointerface between V 2 O 3 and CuCo, endowing its unique electronic structure and conductivity. Meanwhile, CuCo-V 2 O 3 heterostructure facilitates the modulation of local electron density, charge transfer, and adsorption behavior to promote the activation of hydroxymethyl/aldehyde groups. The higher activation of hydroxymethyl groups than that of aldehyde groups over CuCo-V 2 O 3 induces an altered rate-determining step for HMFOR. Consequently, CuCo-V 2 O 3 presents enhanced HMFOR activity (E 10 , 1.27 V RHE ), reaction kinetics (38 mV dec −1 ), 2,5-furandicarboxylic acid selectivity (99.1%), and stability (40 successive cycles). This work provides a strategy for designing highly active catalysts for synthesizing value-added products.
研究领域:
电化学
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催化
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材料科学
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能源转化
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yonghuan Han,Zhiyuan Sang,Daolan Liu,Tao Zhang,Jianmin Feng,Wenping Si,Shi Xue Dou,Ji Liang,Feng Hou
Lithium metal batteries (LMBs) possess high energy and power density, while the dendrite growth on lithium metal anodes prevents its practical application. And most of the current modification methods only improve from a single aspect, which is difficult to achieve ideal effect of suppressing dendrite in the long cycling with high rate and areal capacity. Herein, a conductive and lithiophilic patch-like V 2 O 3 /VN nanosheet as regulating layer is designed on surface of lithium metal anode (V 2 O 3 /VN-Li) to hinder the dendrite growth. The superior lithiophilicity, fast electron/ion transport of V 2 O 3 /VN nanosheets contribute to a low nucleation overpotential and uniform lithium deposition, thus greatly suppressing the dendrite formation at high current density with repeated plating/stripping. As a result, the V 2 O 3 /VN-Li anode achieves ultra-long life for over 2000 h under ultra-high current density and areal capacity (30 mA cm −2 , 30 mAh cm −2 ). The modified strategy of multifunctional regulating layer on the surface of lithium metal anodes can open a new direction for the realization of high-power and high-energy–density LMBs.
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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纳米材料
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电池技术
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Dongfang Ji,Jiaqi Han,Junwei Ding
Although two-dimensional (2D) non-van der Waals (non-vdW) heterostructures with intriguing physical and chemical merits have the potential application in rechargeable batteries, they still lack valid synthetic methods due to their three-dimensional chemical bonding characteristics. Here, a facile one-step method to synthesize the 2D non-vdW V 8 C 7 /V 2 O 3 heterostructure based on the conversion of V 2 AlC MAX phase in the molten copper chloride is developed. Accompanied with the aluminium layer etching, the V 2 AlC precursor is transformed into the intermediate product (i.e., 2D non-vdW V 8 C 7 ). Interestingly, an operando conversion from the intermediate 2D non-vdW V 8 C 7 to the final 2D non-vdW V 8 C 7 /V 2 O 3 heterostructure is achieved via the extrinsic adsorbed oxygen. Similarly, other types of halogenated salts, including copper bromide and cuprous iodide, can also be as etchants to obtain the 2D non-vdW V 8 C 7 /V 2 O 3 heterostructure. Owing to the 2D character and unique hetero-structure, the obtained 2D non-vdW V 8 C 7 /V 2 O 3 heterostructure can be used as a superior cathode of sodium metal batteries. Meanwhile, the resultant 2D non-vdW V 8 C 7 /V 2 O 3 heterostructure can also enhance the whole performance of aqueous zinc-iodine batteries. This new construction method of 2D non-vdW heterostructures facilitates the development of high-performance rechargeable batteries.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xin-ya Bu,Yan-li Zhu,Cong-jie Wang,Wei Li,Yu Xia,Yong Zhao
Thermal batteries are solid-state, thermally activated batteries with long storage times and high reliability. FeS2 is used as a cathode material commonly, but the high internal resistance and low voltage platform limit the improvement of battery performance. Herein, the 1T-phase vanadium disulfide (VS2) is prepared via the scalable hydrothermal method and applied to thermal battery cathode materials for the first time. 1T-VS2 lamellar flower clusters have high electronic conductivity (1.583 S cm–1) at room temperature, which is 75 times higher than FeS2 (0.021 S cm–1). Mechanism analysis shows that 1T-VS2@V2O3 can be formed based on the part of 1T-VS2 being oxidized to V2O3 at the discharge temperature. Benefiting from the synergistic effect of vanadium sulfide and vanadium oxide as a cathode for thermal batteries enhanced specific capacity (292.4 mA h g–1) and mass energy density (572.5 W h kg–1) when cutoff voltage is 1 V. Additionally, the discharge results indicate that the cells utilizing 1T-VS2 cathodes provided a higher voltage platform of 2.11 V than 1.84 V for FeS2. This impressive work can offer a good strategy for boosting cathode materials for a high-performance thermal battery.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 7
·4552-4561
·
IF 6.895
Jing Yang,Bo Wang,Fan Jin,Yu Ning,Hao Luo,Jian Zhang,Fei Wang,Dianlong Wang,Yu Zhou
Lithium–sulfur batteries are promising candidates for the next generation of energy storage systems owing to their high energy density, low toxicity and abundant reserves of sulfur. However, sulfur has poor conductivity, large volume change during charge/discharge, and more importantly, the intermediate polysulfide (Li2Sn, 3 ≤ n≤8) produced in the cycling process is easily soluble in the electrolyte resulting in the “shuttle effect”, which have greatly limited the commercialization of lithium–sulfur batteries. Therefore, it is of great value to develop optimized sulfur cathode materials to improve electrode conductivity, buffer volume change and restrain the diffusion of polysulfide. In this work, we construct a V-MOF (MIL-47) derived V2O3@C hollow microcuboid with a hierarchical lasagna-like structure through hydrothermal synthesis followed by calcination, and employ it as a sulfur host for the first time. The fast anchoring of polysulfide by V2O3 nanoparticles and the high electronic conductivity of the 3D carbon framework can simultaneously inhibit the “shuttle effect” in the charge–discharge process and accelerate the kinetics of the redox process. Moreover, the special lasagna-like structure with appropriate voids generated during calcination not only provides many sites for sulfur loading, but also effectively alleviates the volume expansion problem during the electrochemical reaction. Therefore, the final fabricated sulfur cathode via the melt impregnation method exhibits good cycling stability (62.3% after 1000 cycles at 1C) and rate performance (663 mA h g−1 at 2C) at a relatively high sulfur loading of 3.7 mg cm−2.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Xue Wang,Jiaqi Yue,Jingyi Duan,Jianwei Liu,Peng Chang,Youyu Zhu,Yating Zhang,Guohui Yuan
Aqueous zinc-ion batteries (ZIBs) are desirable for safe and large scale energy storage. However, the lack of suitable cathodes that show excellent comprehensive performance is still key reason that hinders the development of ZIBs. Herein, a laminar hydrated vanadium oxide composites (VOH ND@C) with outstanding rate capability and stability are comprehensively designed and regulated by a fast in-situ electrochemical self-transformation process. The precursor materials (V 2 O 3 ND@C) are fabricated firstly by freeze-drying method in bulk and subsequent calcination process, after which small V 2 O 3 nanodots can be evenly distributed in carbon nanosheets. During electrochemical treatment process, the precursors are fast transformed into laminar hydrated vanadium oxide composites with better structure stability. It is because this strategy of integrating pre-inserted H 2 O molecules and constructing carbon encapsulation are proved to be effectively inhibit volume expansion of vanadium oxide and improve electron transfer. Meanwhile, laminar composite structure and highly exposed active surface from vanadium oxide nanodots contribute to the high-rate capability. Consequently, the VOH ND@C cathode delivers high specific capacity of 452.8 mA h g -1 at 0.2 A g -1 , and excellent rate performance of 176.5 mA h g -1 even at 50 A g -1 . Moreover, excellent cycling stability is acquired with capacity retention 86% over 10,000 cycles. This work is expected to provide a new scalable practical route to improve V-based cathode materials for advanced ZIBs.
研究领域:
储能
·
纳米材料
·
电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2017
·
IF 2.552
Haining Ji,Dongqing Liu,Haifeng Cheng,Lixiang Yang,Chaoyang Zhang,Wenwei Zheng
V 2 O 3 powders were synthesized with mercaptoacetic acid (C 2 H 4 O 2 S) as reducing agent and stabilizer via a facile hydrothermal approach. The crystalline structure, surface morphology, valence state of the derived V 2 O 3 powders were characterized via X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy. It was found that the ratio and reaction time played a duel role in the formation and morphology of the V 2 O 3 powders. The metal-insulator transition properties of V 2 O 3 powders were studied by the differential scanning calorimetry curve and variable temperature Raman spectra. The change in electrical resistance due to the metal-insulator transition was measured from 80 to 240 K using physical property measurement system. The results showed V 2 O 3 samples had excellent electrical switching properties with resistance changes as large as 10 4 . This simple and fast synthesis approach makes the V 2 O 3 powders easily accessible for exploring their fundamental properties and potential applications in novel electronic devices.
研究领域:
材料科学
·
凝聚态物理
·
纳米材料
·
电子器件
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Jiongfan Wang,Lingling Chen,Xin Chen,Xinyu Li,Jianrong Xiao
Lithium-sulfur (Li-S) batteries receive considerable attention for their high energy density, but their slow reaction kinetics and poor shuttle effects raise concerns. Here, synthesized V 2 O 3 spheres were used as substrate templates, and ZIF-67 particles were grown on the surface of V 2 O 3 by in-situ growth method. ZIF-67 was calcined at high temperature to form N-doped porous carbon attached to the surface of V 2 O 3 spheres (Co-NC@V 2 O 3 -sp). The hollow structure of V 2 O 3 spheres provided abundant buffer space for sulfur volume expansion and enhanced the stability of the battery cycle. In addition, the great pore volume and specific surface area resulted in abundant active physical and chemical sites, the strong chemical adsorption of V 4+ effectively trapped polysulfides , and the cobalt nanoparticles on the surface effectively consolidated the active sites. The rapid transformation between shuttle effect and polysulfides were limited by physical coordination and chemisorption, respectively. Owing to this double synergistic effect, the prepared composites had an initial discharge capacity of 1483 mAh g −1 (0.1 C). The initial specific capacity reached 1002 mAh g −1 (0.5 C), and it achieved 645 mAh g −1 after 500 cycles. These results showed that Co-NC@V 2 O 3 -sp has high electrochemical function in Li-S batteries.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yan Li,Huibin Liu,Mingyu Ma,Wenchao Peng,Yang Li,Xiaobin Fan
Vanadium-based oxides, known for their high capacity and low cost, have garnered significant attention as promising cathode candidates in aqueous zinc-ion batteries. Nonetheless, their poor rate performance and limited durability in aqueous electrolytes present a challenge to the realistic implementation of vanadium-based aqueous zinc-ion batteries. Here, we synthesized nitrogen-doped V2O3@C (N–V2O3@N–C) via ammonia treatment of V2O3@C derived from vanadium-based metal–organic framework (V-MOF), aiming to achieve outstanding rate and cycling performance. The N–V2O3@N–C electrode exhibits notable in situ self-transformation into an amorphous state. Density functional theory calculations reveal that the distorted N–V2O3 structure and uneven charge distribution result in the creation of an amorphous state. As expected, Zn/N–V2O3@N–C aqueous zinc-ion batteries can achieve remarkable specific capacity (349.0 mAh g–1 at 0.1 A g–1), along with impressive rate performance, showcasing a capacity of 253.5 mAh g–1 at 5 A g–1 and exceptional durability at 5 A g–1 (96.4% after 1350 cycles). The employed induced amorphization approach offers novel perspectives for designing high-performance cathodes that exhibit both sturdy structures and extended cycling lifespans.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Heng-xue Zhou,Yi Long,Qiu-fang Zhong,Jia-liang Wang,Bo Liang,Ying-bang Yao,Daniel Q. Tan,Sheng-guo Lu,Tao Tao
A novel V 2 O 3 @C/S composite cathode material is prepared via a combined strategy consisting of solution synthesis, hydrothermal treatment and high-temperature carbonization, and all solid-state lithium‑sulfur (Li S) batteries with high-performance are constructed. The obtained V 2 O 3 @C host material demonstrates excellent properties, including good structural stability, superior electrical conductivity, strong interfacial compatibility, notable sulfur adsorption and high catalytic capabilities. At a current rate of 0.1C, the V 2 O 3 @C/S cathode delivers an initial capacity of 1125 mAh g −1 with a capacity retention of 67.1 % after 150 cycles in solid-state cells at the room temperature. At 0.5C, the capacity retention still remains 45.5 % after 250 cycles. Cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel analysis further demonstrate the enhanced reaction kinetics and reduced charge-transfer resistance. This work provides a promising strategy for designing the high-performance cathode materials of solid-state Li S batteries.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
·
电池技术
✓ 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）