LANGMUIR
·
2025
·
IF 3.9
Lina Jin,Baozhong Li,Xinye Qian,Hexiang Xu
Lithium–sulfur batteries (LSBs) are recognized as promising candidates for next-generation high-energy-density energy storage technologies due to their exceptionally high theoretical energy density (2600 Wh kg–1), low cost, and environmental sustainability. However, several challenges, including the polysulfide(LiPS) shuttle effect, the low conductivity of the sulfur cathode, and lithium dendrite growth, have significantly impeded their practical application. In this research, we developed a hierarchical porous Zn3V2O8 (ZVO) modified separator through the high-temperature calcination of a Zn–V-MOF precursor to effectively mitigate LiPS shuttle effects via a dual mechanism. The porous architecture of ZVO facilitates efficient adsorption and rapid conversion of polysulfides through both physical confinement and catalytic activity arising from vanadium’s multivalent states. Additionally, the nitrogen-doped carbon network enhances electrode conductivity while strengthening polysulfide anchoring. The performance of the ZVO-modified separator reveals an initial discharge capacity of 882.9 mAh g–1 at 0.5C with a sulfur loading of 2.8 mg cm–2, demonstrating retention at 541.2 mAh g–1 after 500 cycles-yielding a capacity retention rate of 61.3%. Notably, under commercially viable conditions (5 mg cm–2 sulfur loading and 0.1C), the battery exhibits stable cycling performance, underscoring the potential applicability of ZVO-based separators in practical high-energy-density LSB systems.
研究领域:
储能技术
·
材料科学
·
电化学
·
纳米技术
·
电池技术
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Meiling Li,ShanShan Mao,Xin Zhou,Hao Wang
The efficient separation of ethylene (C 2 H 4 ) from ethane/ethylene (C 2 H 6 /C 2 H 4 ) mixtures, achieved via a single-step selective adsorption process, represents a promising yet challenging goal. Notably, the pursuit of adsorbents that combine high adsorption capacity with low adsorption heat is paramount, as these attributes directly correlate with superior separation efficiency and minimized regeneration energy. In this study, we present the selective adsorption of C 2 H 6 over C 2 H 4 by a V-MOF (V-TBAPy), constructed from [V( μ 2 -O)O 4 ] n secondary building units. The pore surface of V-TBAPy is characterized by a high density of aromatic rings and oxygen atoms, which facilitates targeted adsorption of C 2 H 6 through C-H···π and C-H···O interactions. V-TBAPy adsorbs up to 102.6 cm 3 /g of C 2 H 6 at 298 K and 1 bar, with a selectivity of 1.66 for an equimolar C 2 H 6 /C 2 H 4 binary mixture. Importantly, the adsorption heat for C 2 H 6 on V-TBAPy is as low as 22.7 kJ/mol, enabling energy-efficient regeneration. Breakthrough experiments have confirmed the efficacy of V-TBAPy in achieving one-step purification of C 2 H 6 /C 2 H 4 mixtures in conditions mimicking industrial settings.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Youcai Ding,Yuqi Peng,Wenyong Chen,Yunjuan Niu,Shougang Wu,Xianxi Zhang,Linhua Hu
Rechargeable aqueous zinc-ion battery is a promising energy storage device because of its low cost and high safety. However, they are still in their infancy due to the limited choice of cathodes with high capacity and satisfactory cycling performance. In this work, porous V 2 O 5 materials were obtained by pyrolysis of vanadium-MOF and adopted as intercalation cathode for aqueous zinc-ion batteries . V 2 O 5 purchased commercially as a control, the effects of specific surface area, pore size distribution and mixed valence of electrodes on the performance of batteries were studied. The novel cathode delivers high capacities of 300 mA h g − 1 compared to 60 mAh g − 1 for C-V 2 O 5 at current density of 100 mA g − 1 . The energy density of this Zn ion battery is about 230 Wh kg − 1 , which is much higher than commercial lead acid batteries . The capacity of P-V 2 O 5 electrode retains 120 mA h g − 1 even at 2000 mA g − 1 , which is much higher than that of C-V 2 O 5 . Moreover, the structure of V 2 O 5 nanoplates and their composites with carbon materials can improve the cyclic stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Huajing Wang,Li Zeng,Xiao Wu,Baisheng Sa,Hanxin Chen,Rui Xiong,Dawen Zeng
The long-term stability of the metal-organic frameworks (MOFs) gas sensors is of great value in advancing their practical applications under complex environmental conditions (high humidity, high temperature, etc.). However, long-term stable and accurate gas detection by MOF sensors in an energy-efficient state remains a formidable challenge. In this work, the vanadium-based MOF MIL-47(V) is reported as a novel and efficient NO 2 sensing material, which exhibits intense response and trace detection with outstanding stability at room temperature (RT, 25 °C). The high specific surface area and abundant hollow channels of MIL-47(V) provide numerous active sites for the adsorption of NO 2 molecules. The high chemical stability and hydrophobicity enable the MIL-47(V) sensor to maintain long-term stability in the face of environmental disturbances. Furthermore, theoretical calculations validate the high reactivity of the V atoms and the hollow channels in MIL-47(V). The V sites demonstrate a strong adsorption energy of −0.87 eV to NO 2 , which enhances the interaction between the MIL-47(V) and NO 2 . The MIL-47(V) sensor shows outstanding NO 2 sensing properties at RT, with high sensitivity (response ≈ 2.89–10 ppm NO 2 ), trace detection limit (15 ppb), excellent long-term stability (response ≈ 2.11–3 ppm NO 2 , eight weeks) and good humidity resistance (response ≈ 1.21–1.14 to 0 %-80 % relative humidity, 100 ppb NO 2 ), which makes it remarkably attractive for ultrasensitive, accurate and reliable NO 2 detection at RT.
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 11
·110524
·
IF 3.9
Mengmei Liu,Zhihua Li,Yibo Zhang
Layered vanadium oxides have been considered as highly promising cathode materials for aqueous zinc-ion batteries (ZIBs) due to their unique open crystal structure and high theoretical specific capacity. However, the structural instability and sluggish Zn2+ diffusion kinetics limit their further application in ZIBs. Here, a novel and stable cathode (porous Na-V2O5) for aqueous ZIBs is rationally constructed by using a straightforward MOF-assisted synthetic method. The Na-V2O5 exhibits remarkable capacity of 306 mAh g−1 at 0.1 A g−1, exceptional rate characteristics (264.3 mAh g−1 at 2.0 A g−1), and great cycling capabilities over 1000 cycles with a capacity-retention of 83.4% when examined as a cathode for ZIBs. Higher pseudo-capacitance, quicker charge-transfer/ion-diffusion kinetics, and a robust architecture have been attained in the Na-V2O5 cathode, which are in charge of the superior zinc-ion storage performance. This has been made possible by the pre-intercalated Na+ cations and the resulting layer structure. Additionally, the Zn2+ and H+ co-intercalation/extraction-based energy storage method has been validated. This research may help rationally design layer-structured V2O5 cathodes for high energy and power density aqueous energy storage systems.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Mengmei Liu,Zhihua Li,Yibo Zhang
The safety and low toxicity of aqueous zinc-ion batteries (ZIBs) are piqueing intense scientific interest. Slow reaction kinetics and substantial structural degradation of the cathode materials, however, prevent the creation of ZIBs. As a better cathode for ZIBs, tunnel-structured V 2 O 5 hierarchical with a high preintercalated K cation content (K-V 2 O 5 ) are proposed here. The K-V 2 O 5 are specifically made using a self-sacrificial template approach that also involves hydrothermal intercalation in a neutral solvent and phase change during annealing. A subsequent H + and Zn 2+ intercalation procedure at various voltage platforms is clarified when tested as cathodes for ZIBs. Prior to the subsequent insertion of Zn 2+ into V 2 O 5 , the water-solvated H + first enters tunnel cavities, which partially transforms the V 2 O 5 phase from a tunnel-type structure to a layered-type structure. The pre-intercalated K cations with a high content that act as pillars in the layered-type matrix stabilize the layered structures and widen the migration channels for Zn 2+ , which can aid in the diffusion of Zn 2+ in the V 2 O 5 cathodes.
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
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2024
·
IF 3.7
Tao Wei,Mengting Wang,Yanyan Zhou,Xingtong Guo,Sijia Wang,Ye Liu,Cheng Sun,Qian Wang
ABSTRACT At present, commercial Li-ion batteries are hardly to satisfy the growing demand for high energy density , for this purpose, lithium metal batteries have attracted worldwide attention in recent years. However, its practical applications are hindered by the formation of Li dendrites and volume effect during Li plating/stripping process, which leads to a lot of safety hazards. Herein, we first employed MOF-derived V 2 O 5 nanoparticles to decorate the carbon fiber cloth (CFC) backbone to acquire a lithiophilic 3D porous conductive framework (CFC@V 2 O 5 ). Subsequently, the CFC@V 2 O 5 skeleton was permeated with molten Li to prepare CFC@V 2 O 5 @Li composite anode. The CFC@V 2 O 5 @Li composite anode can be stably cycled for more than 1650 h at high current density (5 mA·cm −2 ) and areal capacity (5 mA·h·cm –2 ). The prepared full cell can initially maintain a high capacity of about 143 mA·h·g −1 even at a high current density of 5 C, and can still maintain 114 mA·h·g −1 after 1000 cycles.
研究领域:
材料科学
·
能源技术
✓ 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）