Y-doped V<sub>2</sub>O<sub>5</sub> with enhanced lithium storage performance

Yao, Jinhuan; Yin, Zhoulan; Zou, Zhengguang; Li, Y. W.

doi:10.1039/c7ra03885b

Cited by 47 publications

(20 citation statements)

References 59 publications

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“…By comparison, the potential separation of the ternary Fe 2 O 3 /Fe 3 O 4 /FeCO 3 composite is smaller than that of single-component Fe 2 O 3 under the same scan rate, suggesting its superior electrochemical reaction reversibility. The Li + diffusion coefficients ( D Li + ) of the two samples are calculated by using Randles–Sevcik equation , where I p is the peak current (A), n is the number of electrons involved in oxidation or reduction, A is the electrode area (cm 2 ), D Li + is the diffusion coefficient of Li + (cm 2 s –1 ), C Li + is the shuttle concentration (mol cm –3 ), and v is the scan rate (V s –1 ) in CV measurement. Based on the CV data (Figure c,d), we can obtain four lines ( I p vs v 1/2 ) as shown in Figure e,f.…”

Section: Resultsmentioning

confidence: 99%

Ternary Fe₂O₃/Fe₃O₄/FeCO₃ Composite as a High-Performance Anode Material for Lithium-Ion Batteries

Huang

et al. 2019

J. Phys. Chem. C

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Fe-based oxides have been recognized as one of the most promising anode materials for lithium-ion batteries (LIBs) due to their theoretical capacities, low cost, eco-friendliness, and natural abundance. However, poor cycling stability and low rate capability severely hindered their practical applications. Compared to single-component materials, multicomponent composites are more capable of achieving optimal electrochemical performance for electrode materials due to their synergetic effect. In this work, a novel ternary Fe2O3/Fe3O4/FeCO3 composite is fabricated by a facile hydrothermal method with FeCl2·4H2O and urea as raw materials. When evaluated as an anode material for LIBs, this ternary Fe2O3/Fe3O4/FeCO3 composite exhibits excellent rate capability (with reversible capacities of 624, 488, and 270 mAh g–1 at 1.0, 3.0, and 10.0 A g–1, respectively) and remarkable cycling stability (with a reversible capacity of 779 mAh g–1 after 300 cycles at 0.5 A g–1 and 410 mAh g–1 after 800 cycles at 3.0 A g–1), which are much superior to those of the single-component Fe2O3 material. It is found that the ternary Fe2O3/Fe3O4/FeCO3 composite possesses good structural integrity during cycling and fast electrochemical reaction kinetics, which result in excellent long-term cycling stability and enhanced high-rate capability. The results may provide clues for the rational structural design of high-performance Fe-oxide anode materials for next-generation LIBs.

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Section: Resultsmentioning

confidence: 99%

Ternary Fe₂O₃/Fe₃O₄/FeCO₃ Composite as a High-Performance Anode Material for Lithium-Ion Batteries

Huang

et al. 2019

J. Phys. Chem. C

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“…In particular, vanadium bronzes of the general stoichiometry MxV2O5 (M = Na, Nb, Ta, K, Cu, Ag) were investigated for their capacitive performance in terms of current density, reversibility, ion storage capacity, and cyclic stability [32]. In [64], it was shown that dopant cations enhance the structural stability of V2O5 and, consequently, improve electrochemical performance. FE-SEM was carried out to study the effect of substrate temperature on the morphology of V2O5 coatings for 5%, 10%, and 15% Ag loading at a temperature of 400 °C for a growth period of 1 h (Figure 2).…”

Section: Electrochemical Performance Of V2o5 Based On Aqueous LI Elecmentioning

confidence: 99%

Towards High Performance Chemical Vapour Deposition V2O5 Cathodes for Batteries Employing Aqueous Media

Vernardou

Drosos²,

Kafizas

et al. 2020

Molecules

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The need for clean and efficient energy storage has become the center of attention due to the eminent global energy crisis and growing ecological concerns. A key component in this effort is the ultra-high performance battery, which will play a major role in the energy industry. To meet the demands in portable electronic devices, electric vehicles, and large-scale energy storage systems, it is necessary to prepare advanced batteries with high safety, fast charge ratios, and discharge capabilities at a low cost. Cathode materials play a significant role in determining the performance of batteries. Among the possible electrode materials is vanadium pentoxide, which will be discussed in this review, due to its low cost and high theoretical capacity. Additionally, aqueous electrolytes, which are environmentally safe, provide an alternative approach compared to organic media for safe, cost-effective, and scalable energy storage. In this review, we will reveal the industrial potential of competitive methods to grow cathodes with excellent stability and enhanced electrochemical performance in aqueous media and lay the foundation for the large-scale production of electrode materials.

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“…[36][37][38] Therefore, this may generate a Marangoni flow travelling towards the area with a higher interfacial tension (cathodic pole) to drag the liquid metal toward the cathode. [39] As such, liquid metal can be succeedfully separated from the solid shell. We observed the separation of liquid metal from the solid shell ≈40 s after applying the voltage (Figure 1f), and the liquid metal droplet immediately actuated toward the anode similar to the behaviors of bare Galinstan droplets.…”

Section: Wwwadvmattechnoldementioning

confidence: 99%

Magnetically‐ and Electrically‐Controllable Functional Liquid Metal Droplets

Kuang

et al. 2019

Adv Materials Technologies

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including microelectromechanical (MEMS) actuators, [8][9][10][11][12] microscale heat exchangers, [13,14] soft and wearable electronics, [15][16][17][18][19] and reconfigurable structures. [20,21] Several techniques have been developed to control the motion and deformation of liquid metal droplets. Applying an external potential gradient is the most commonly used method to drive and deform liquid metal within electrolytes. [8,9,12,22] Other approaches for driving liquid metal droplets by inducing chemical reactions, [23,24] and ionic imbalance [25] have also been demonstrated. Recently, the actuation of liquid metal droplets using external magnetic fields has been explored through the modification of liquid metal surface with ferromagnetic materials. For example, liquid metal coated with iron (Fe) nanoparticles (NPs) can be manipulated, merged, and separated in microfluidic channels with various angles in discretionary direction using an external magnetic field. [26] Other ferromagnetic materials such as nickel can be electroplated on the surface of liquid metal to form a motor. [27] The liquid metal motor can be controlled using both magnetic and electric fields, and also can achieve autonomous locomotion by reacting with aluminum foil. Similarly, porous structure of liquid metal can be obtained by mixing liquid metal and iron NPs in hydrochloric acid. [28] Such a porous mix can expand when subjected to heating to control its density. However, the above-mentioned approaches using electroplating or NP coating/mixing significantly affect the intrinsic properties of liquid metal and may sacrifice the surface fluidity, deformability, and flexibility of the material.Gallium-based room temperature liquid metal alloys have recently been explored to be an emerging functional material. They have attracted particular attentions in a variety of applications due to their unique properties. Many of the applications are based on the precise control over the motion of liquid metal, and yet, the fact that currently lacking the advanced and reliable controlling methods greatly hinders the potential of liquid metal to be applied in a wider range of fields. In this study, an innovative approach is developed to obtain functional liquid metal (FLM) by modifying it with copper-iron magnetic nanoparticles (Cu-Fe NPs). The magnetic modification process enables the Cu-Fe NPs to be suspended within the liquid metal and form the FLM. The FLM exhibits similar appearance, actuating behaviors, and deformability in alkaline solutions to those of pure liquid metal alloys. Meanwhile, the magnetic modification enables the precise and rapid manipulation of the liquid metal using a magnetic field. Most importantly, for the first time, the precise control and climbing locomotion of the FLM is demonstrated with the interworking of both electric and magnetic fields simultaneously. The remarkable features of the FLM may represent vast potentials toward the development of future intelligent soft robots.

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Y-doped V₂O₅ with enhanced lithium storage performance

Abstract: Y-doped V2O5 shows greatly enhanced cycling stability, better rate capability, and a higher Li+ diffusion coefficient than the pure V2O5 counterpart.

Cited by 47 publications

References 59 publications

Ternary Fe₂O₃/Fe₃O₄/FeCO₃ Composite as a High-Performance Anode Material for Lithium-Ion Batteries

Ternary Fe₂O₃/Fe₃O₄/FeCO₃ Composite as a High-Performance Anode Material for Lithium-Ion Batteries

Towards High Performance Chemical Vapour Deposition V2O5 Cathodes for Batteries Employing Aqueous Media

Magnetically‐ and Electrically‐Controllable Functional Liquid Metal Droplets

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Y-doped V2O5 with enhanced lithium storage performance

Abstract: Y-doped V2O5 shows greatly enhanced cycling stability, better rate capability, and a higher Li+ diffusion coefficient than the pure V2O5 counterpart.

Cited by 47 publications

References 59 publications

Ternary Fe2O3/Fe3O4/FeCO3 Composite as a High-Performance Anode Material for Lithium-Ion Batteries

Ternary Fe2O3/Fe3O4/FeCO3 Composite as a High-Performance Anode Material for Lithium-Ion Batteries

Towards High Performance Chemical Vapour Deposition V2O5 Cathodes for Batteries Employing Aqueous Media

Magnetically‐ and Electrically‐Controllable Functional Liquid Metal Droplets

Contact Info

Product

Resources

About

Y-doped V₂O₅ with enhanced lithium storage performance

Ternary Fe₂O₃/Fe₃O₄/FeCO₃ Composite as a High-Performance Anode Material for Lithium-Ion Batteries

Ternary Fe₂O₃/Fe₃O₄/FeCO₃ Composite as a High-Performance Anode Material for Lithium-Ion Batteries