Nanoscale
·
2021
·Vol. 13
·期 4
·2399-2407
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IF 7.79
Guang Su,Shufeng Chen,Huilong Dong,Yafei Cheng,Quan Liu,Huaixin Wei,Edison Huixiang Ang,Hongbo Geng,Cheng Chao Li
Aqueous zinc-ion batteries (ZIBs), due to their sluggish Zn2+ diffusion kinetics, continue to face challenges in terms of achieving superior high rate, long-term cycling and low-temperature properties. Herein, K+ pre-intercalated layered V2O5 (K0.5V2O5) composites with metallic features are capable of delivering excellent zinc storage performance. Specifically, the K0.5V2O5 electrode delivers a high reversible capacity of 251 mA h g−1 at 5 A g−1 after 1000 cycles. Even at a low temperature of −20 °C, high reversible capacities of 241 and 115 mA h g−1 can be obtained after 1000 cycles at 1 and 5 A g−1, respectively. The outstanding electrochemical performance is attributed to the incorporation of K+ into the layered V2O5, which acts as pillars to promote the Zn2+ diffusion and increase the structural stability during cycling. Density functional theory calculations demonstrate that the interlayer doping of K+ can benefit electron migration, and therefore enhance the Zn2+ (de)intercalation kinetics. Meanwhile, the Zn2+ storage mechanism of K0.5V2O5 is revealed by ex situ X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy characterization. This work may pave the way for exploiting high-performance cathodes for aqueous ZIBs.
研究领域:
材料科学
·
电化学
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Bin Xiao,Bao Zhang,Jun-chao Zheng,Lin-bo Tang,Chang-sheng An,Zhen-jiang He,Hui Tong,Wan-jing Yu
VO 2 is considered as a promising anode material for lithium ion batteries , owing to its high theoretical capacity and fast ion-transfer rate. However, the development of VO 2 is hindered by the severe issues of poor electrical conductivity , large volume changes and low energy density . In this study, nano-micro structure VO 2 /CNTs spheres are well designed and successfully synthesized through a one-step solvothermal method, where the carbon nanotubes are inlayed throughout the whole microspheres . This unique structure enables carbon nanotubes to improve the ion and electron conductivity of VO 2 . Besides, it can achieve a high tap density (> 1.3 g cm 3 ) of VO 2 /CNTs electrode, which is higher than nanomaterials (< 1.0 g cm 3 ), and compatible with the current commercial anode materials. The Li + storage behavior of VO 2 /CNTs is studied systematically in the potential range 0.01–3.0 V, it can obtain a high reversible specific capacity of 537.6 mA h g −1 at the current density of 0.05 A g −1 . Furthermore, the lithium insertion/extraction reaction mechanism of nano-micro structure VO 2 /CNTs is clarified. The results demonstrate that the nano-micro structure relieves the volume changes during charge/discharge cycling. Therefore, it provides an insight to create functional materials with nano-micro structure for a wide range application.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米技术
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Nuo Xu,Chenyi Yan,Wei He,Lin Xu,Zhouheng Jiang,Anyu Zheng,Huayu Wu,Ming Chen,Guowang Diao
As a new generation of electrode material , flexible electrode material can effectively broaden the application area and scope of energy storage devices. In this paper, a new vanadium pentoxide carbon fiber cloth (V 2 O 5 -CFC) is successful synthesized by means of electrospinning and high-temperature calcination. As a cathode material for aqueous zinc-ion batteries, V 2 O 5 -CFC possesses significantly increased specific capacity (132 mA h g −1 at 1 A g −1 ) and good cycling ability (154 mA h g −1 at 0.5 A g −1 after 1000 cycles). The volume effect in the charge/discharge process can be alleviated by using a composite fiber structure to avoid agglomeration of V 2 O 5 nanosheets . Most important, V 2 O 5 -CFC displays the flexible property and demonstrates its potential applications as a high-energy density and flexible energy storage device with good reversibility . Therefore, the design and synthesis strategy of flexible nanofibers film is prospective for applications in next-generation flexible aqueous zinc-ion batteries.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
Tongyu Liu,Yaoguo Huang,Linlin Chen,Hui Zhang,Caifu Dong,Ming Wang,Yali Zhang
Vanadium oxide (V 2 O 5 ) cathode material , possessing abundant reserves and high theoretical capacity, has been extensively researched in aqueous zinc ion batteries (ZIBs). However, its electrochemical performance is significantly hindered by insufficient electronic conductivity, vanadium dissolution into electrolyte, and slow diffusion kinetics. In this study, the V 2 O 5 micro-flower was first synthesized by a solvothermal method, and then modified by coating with AlF 3 passivation layer, forming AlF 3 @V 2 O 5 hybrid material . Impressively, AlF 3 @V 2 O 5 exhibits excellent electrochemical and kinetic properties due to the special structure of V 2 O 5 and the interfacial protection of AlF 3 . An exceptional rate property (325 mAh g −1 at 0.1 A g −1 , 188 mAh g −1 at 15 A g −1 ) as well as extraordinary cycling stability with 89.3% capacity retention after 6000 cycles at 10 A g −1 can be attained with 2 wt% AlF 3 addition (that is AF-2@V 2 O 5 ). The computation based on density functional theory (DFT) suggests that AlF 3 coating can reduce the interlayer electrostatic interaction and adsorption energy barrier between the intercalated Zn 2+ and V 2 O 5 host, thereby enabling fast redox kinetics. This study showcases the efficacy of interfacial modification of passivated coatings and presents an influential approach for material design in ZIBs .
研究领域:
材料科学
·
能源存储
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产品关联
DOI
高影响因子
Cell Reports Physical Science
·
2023
·
IF 8.9
Baoshun Wang,Ya Huang,Ying Han,Siming Zhao,Weilu Ding,Wenshuo Zhang,Run Li,Xueke Wu,Qinyuan Jiang,Yunrui Li,Di Gao,Yanlong Zhao,Fei Wang,Hairong Jiang,Rufan Zhang
Transition metal oxides (TMOs) are promising inorganic electrochromic materials (ECMs) that can be widely used in smart windows, adaptive camouflage, electronic displays, energy storage, etc. However, there are still huge challenges for TMOs to simultaneously achieve high performance of electrochromism and cyclic stability. Herein, we successfully synthesize single tungsten (W) atom-modified hydrangea-like porous vanadium pentoxide nanoflowers (HLP-W/V 2 O 5 ) with high loading content of W atoms (13.7%). The HLP-W/V 2 O 5 -based ECMs exhibit enhanced EC performance with three reversible color transformations (yellow, blue, and brown) at a voltage lower than 1.2 V and outstanding cyclic stability (10,000 cycles without significant attenuation). This work provides a feasible strategy for the efficient preparation of high-performance and durable TMO-based ECMs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2024
·
IF 2.8
Bo Wang,Qiaowen Yang,Ting Li,Sifan Cui,Pengqiang Feng,Xuan Hou
BACKGROUND Selective catalytic reduction (SCR) can effectively remove NO x from flue gas in a coal-fired power plant. As the core of SCR technology, the catalyst has a limited lifespan. The process of reducing acid leaching and roasting water leaching can efficiently extract vanadium and tungsten from spent SCR catalyst. For vanadium recovery in solution, the traditional vanadium precipitation process by NH 4 Cl has the disadvantages of consuming high precipitant dosage and producing large amounts of waste water. RESULTS This study focused on the vanadium precipitation process using a solution containing vanadium obtained from adopting some steps to handle the spent SCR catalyst. First, melamine was screened out as the vanadium precipitant. Then, the vanadium precipitation conditions were optimized as follows: solution pH value of 1.0, n (C 3 H 6 N 6 )/ n (V) = 0.8, 110 °C and 30 min. Under the best precipitation conditions, the vanadium precipitation efficiency of melamine can reach 99.32%. Finally, the mechanisms of vanadium precipitation by NH 4 Cl and melamine were discussed, respectively. CONCLUSION The results showed that the vanadium precipitation process by NH 4 Cl followed the chemical reactions between NH 4 + and vanadium ions, while the vanadium precipitation process by melamine followed the redox and complexation reactions which essentially belonged to the types of chemical adsorption. The vanadium precipitation product was roasted at 550 °C for 2 h to obtain the vanadium product. The main component of the vanadium product was V 2 O 5 , with a purity of 93.27 wt%. The total recovery efficiency of vanadium from spent SCR catalyst was 78.24%. © 2024 Society of Chemical Industry (SCI).
研究领域:
环境科学
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化学工程
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材料科学
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产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 7
·1660
·
IF 3.1
Xianghui Jia,Kaixi Yan,Yanzhi Sun,Yongmei Chen,Yang Tang,Junqing Pan,Pingyu Wan
Rechargeable aqueous zinc-ion batteries have attracted a lot of attention owing to their cost effectiveness and plentiful resources, but less research has been conducted on the aspect of high volumetric energy density, which is crucial to the space available for the batteries in practical applications. In this work, highly crystalline V2O5microspheres were self-assembled from one-dimensional V2O5nanorod structures by a template-free solvothermal method, which were used as cathode materials for zinc-ion batteries with high performance, enabling fast ion transport, outstanding cycle stability and excellent rate capability, as well as a significant increase in tap density. Specifically, the V2O5microspheres achieve a reversible specific capacity of 414.7 mAh g−1at 0.1 A g−1, and show a long-term cycling stability retaining 76.5% after 3000 cycles at 2 A g−1. This work provides an efficient route for the synthesis of three-dimensional materials with stable structures, excellent electrochemical performance and high tap density.
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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wenzhe Su,Zanyu Chen,Xingkai Wang,Peng Cui,Minjie Yao,Hui Sun,Hong Zhang,Yida Deng,Xiaopeng Han,Wenbin Hu
Due to high safety and low-cost, aqueous Zn-ion batteries (ZIBs) are expected to be a promising next-generation energy storage technology. Exploiting high capacity and stable cathode materials are extremely important for the development of aqueous ZIBs. However, commercial V 2 O 5 despite its high theoretical specific capacity, suffers from structural instability during charging and discharging, and strong electrostatic forces seriously limit the diffusion of Zn 2+ . Herein, a novel dynamic transport mechanism of Zn 2+ is designed by intercalating organic cations (C 8 H 15 N 2 + ) from ionic liquids into the interlayers of V 2 O 5 . The electrostatic interaction between the C 8 H 15 N 2 + and the V-O layers enhance the structure stability of the layers and increase the interlayer spacing. Meanwhile, the C 8 H 15 N 2 + between the V-O layers reduce the diffusion energy barrier of Zn 2+ and enable the rapid dynamically transport of Zn 2+ . The diffusion coefficient is enhanced by an order of magnitude. The optimized V 2 O 5 cathode exhibits a high capacity of 268 mA h/g at 100 mA/g and excellent cycling stability (over 500 cycles at 200 mA/g with nearly 100 % coulombic efficiency). The home-made pouch cells deliver a high energy density of 310 W h kg −1 . This interesting idea opens up a new research direction for high-energy secondary batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2017
·Vol. 27
·期 12
·1606269
·
IF 12.124
Haiqing Liu,Yanping Tang,Chi Wang,Zhixiao Xu,Chongqing Yang,Tao Huang,Fan Zhang,Dongqing Wu,Xinliang Feng
A novel lyotropic liquid-crystal (LC) based assembly strategy is developed for the first time, to fabricate composite films of vanadium pentoxide (V 2 O 5 ) nanobelts and graphene oxide (GO) sheets, with highly oriented layered structures. It is found that similar lamellar LC phases can be simply established by V 2 O 5 nanobelts alone or by a mixture of V 2 O 5 nanobelts and GO nanosheets in their aqueous dispersions. More importantly, the LC phases can be retained with any proportion of V 2 O 5 nanobelts and GO, which allows facile optimization of the ratio of each component in the resulting films. Named VrGO, composite films manifest high electrical conductivity, good mechanical stability, and excellent flexibility, which allow them to be utilized as high performance electrodes in flexible energy storage devices. As demonstrated in this work, the VrGO films containing 67 wt% V 2 O 5 exhibit excellent capacitance of 166 F g −1 at 10 A g −1 ; superior to those of the previously reported composites of V 2 O 5 and nanocarbon. Moreover, the VrGO film in flexible lithium ion batteries delivers a high capacity of 215 mAh g −1 at 0.1 A g −1 ; comparable to the best V 2 O 5 based cathode materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Li Xiong,Zilin Qu,Zongyou Shen,Guanghui Yuan,Gang Wang,Beibei Wang,Hui Wang,Jintao Bai
Hypothesis Using V 2 O 5 as an aqueous zinc-ion battery (ZIB) cathode has major drawbacks, including inferior electrode/electrolyte contact interfaces, morphological and structural deterioration, and unsatisfactory conductivity. Purposeful construction of ball-in-ball structured V 2 O 5 with porous and void architectures wrapped with carbon fibers is expected to overcome the drawbacks, thus bringing the electrochemical performance of V 2 O 5 into full play. Experiments In situ construction of ball-in-ball structured porous V 2 O 5 wrapped by intertwined carbon fibers (V 2 O 5 @void@V 2 O 5 @CFs) is implemented through a simple combined hydrothermal and calcination route. A combination of in/ex situ analytical methods and density functional theoretical calculations are performed to clarify the energy storage mechanism of the material for aqueous ZIBs. Findings The reversible reaction to generate Zn x V 2 O 5 ·nH 2 O executes during the zinc ion insertion/extraction procedure in V 2 O 5 @void@V 2 O 5 @CFs. Benefitting from the synergistic effect of the porous ball-in-ball structure with void space and the wrapped CFs, the material exhibits boosted specific capacity (455 mAh g −1 after 100 cycles and 149 mAh g −1 after 2000 cycles at 4 and 25 A g −1 , respectively), cyclic stability, rate ability and energy density (355 Wh kg −1 at 739 W kg −1 ) when used for aqueous ZIBs due to improved capacitive contribution, fast zinc ion transport dynamics, and enhanced conductivity.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Lina Li,Sai Dong,Wenchao Peng,Jiapeng Liu
Aqueous zinc-ion batteries (AZIBs) are expected to be a promising large-scale energy storage system owing to their intrinsic safety and low cost. Nevertheless, the development of AZIBs is still plagued by the design and fabrication of advanced cathode materials. Herein, the amorphous vanadium pentoxide and hollow porous carbon spheres (AVO-HPCS) hybrid is elaborately designed as AZIBs cathode material by integrating vacuum drying and annealing strategy. Amorphous vanadium pentoxide provides abundant active sites and isotropic ion diffusion channels. Meanwhile, the hollow porous carbon sphere not only provides a stable conductive network, but also enhances the stability during charging/discharging process. Consequently, the AVO-HPCS exhibits a capacity of 474 mAh/g at 0.5 A/g and long-term cycle stability. Moreover, the corresponding reversible insertion/extraction mechanism is elucidated by ex-situ X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy. Furthermore, the flexible pouch battery with AVO-HPCS cathode shows high comprehensive performance. Hence, this work provides insights into the development of advanced amorphous cathode materials for AZIBs.
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
IONICS
·
2025
·Vol. 31
·期 9
·8961-8969
·
IF 2.6
Ning Liping,Sui Zhixing,Tang Anping,Liang Ziqin,Chen Hezhang,Song Haishen,Xu Guorong
Conversion reactions have made LiF-metal oxide (MO) composites with attractive specific capacities compelling candidates for the next generation of lithium-ion battery cathode materials. However, it is necessary for the high charge voltage (> 4.5 V) to drive the redox reaction of MOs and break a strong ionic bond between Li + and F − upon charge. It is a crucial way for decrease in the charge voltage to lower the activation energy barrier of the redox process between LiF and MOs. A novel conversion cathode LiF-V 2 O 3 system is proposed in this study. Unlike most of the previously reported LiF-MOs systems, the LiF-V 2 O 3 system can work at the lower charge cut off voltage of 4.3 V. It delivers a reversible specific capacity of 197 mAh g −1 at C/20 rate in the voltage range of 2–4.3 V. Cyclic voltammetry data suggest a dominant contribution of pseudocapacitance effect in the conversion reaction of the LiF-V 2 O 3 sample.
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DOI
高影响因子
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