V2O5·nH2O nanosheets and multi-walled carbon nanotube composite as a negative electrode for sodium-ion batteries

Etman, Ahmed S.; Sun, Junliang; Younesi, Reza

doi:10.1016/j.jechem.2018.04.011

Cited by 28 publications

(20 citation statements)

References 33 publications

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“…The research interest in rechargeable batteries and supercapacitors keeps growing due to their application in a variety of technologies such as portable electronic devices, hybrid vehicles, grid storage, and so on. [ 1–8 ] Li‐ion batteries have been developed to commercial application over last 30 years; [ 9–12 ] however, rechargeable nonaqueous batteries based on multivalent ions (e.g., Mg 2+ , Ca 2+ , and Zn 2+ ) have attracted a lot of interest in the last few years due to their abundancy in nature and their potential to provide a reasonable energy density compared with the state‐of‐art Li‐ion batteries. [ 13–17 ] Among them, nonaqueous Zn batteries are interesting to consider, as metallic zinc anode has a higher volumetric capacity compared with metallic Mg and Ca anodes (5851 mAh cm −3 for Zn compared with 3833 and 2073 mAh cm −3 for Mg and Ca, respectively).…”

Section: Introductionmentioning

confidence: 99%

Acetonitrile‐Based Electrolytes for Rechargeable Zinc Batteries

et al. 2020

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Herein, Zn plating–stripping onto metallic Zn using a couple of acetonitrile (AN)‐based electrolytes (0.5 m Zn(TFSI)2/AN and 0.5 m Zn(CF3SO3)2/AN) is studied. Both electrolytes show a reversible Zn plating/stripping over 1000 cycles at different applied current densities varying from 1.25 to 10 mA cm−2. The overpotentials of Zn plating–stripping over 500 cycles at constant current of 1.25 and 10 mA cm−2 are ±0.05 and ±0.2 V, respectively. X‐ray photoelectron spectroscopy analysis reveals that no decomposition product is formed on the Zn surface. The anodic stability of four different current collectors of aluminum foil (Al), carbon‐coated aluminum foil (C/Al), TiN‐coated titanium foil (TiN/Ti), and multiwalled carbon nanotube paper (MWCNT‐paper) is tested in both electrolytes. As a general trend, the current collectors have a higher anodic stability in Zn(TFSI)2/AN compared with Zn(CF3SO3)2/AN. The Al foil displays the highest anodic stability of ≈2.25 V versus Zn2+/Zn in Zn(TFSI)2/AN electrolyte. The TiN/Ti shows a comparable anodic stability with that of Al foil, but its anodic current density is higher than Al. The promising reversibility of the Zn plating/stripping combined with the anodic stability of Al and TiN/Ti current collectors paves the way for establishing highly reversible Zn‐ion batteries.

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Section: Introductionmentioning

confidence: 99%

Acetonitrile‐Based Electrolytes for Rechargeable Zinc Batteries

et al. 2020

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“…To date, a large number of cathode materials, including layered transition-metal oxides [8], polyanion cathodes [9], Prussian blue analogs [10], and organic compounds [11] for SIBs have been explored. Among these potential cathode materials for SIBs, vanadium oxides have attracted more attention owing to their open frameworks, rich oxidation states of V (from V 2+ to V 5+ ), high theoretical capacities, and abundant source [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Sodium ion storage performance and mechanism in orthorhombic V2O5 single-crystalline nanowires

Yao

et al. 2020

Sci. China Mater.

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A fundamental understanding of the electrochemical reaction process and mechanism of electrodes is very crucial for developing high-performance electrode materials. In this study, we report the sodium ion storage behavior and mechanism of orthorhombic V 2 O 5 single-crystalline nanowires in the voltage window of 1.0-4.0 V (vs. Na/Na +). The single-crystalline nanowires exhibit a large irreversible capacity loss during the first discharge/charge cycle, and then show excellent cycling stability in the following cycles. At a current density of 100 mA g −1 , the nanowires electrode delivers initial discharge/charge capacity of 217/88 mA h g −1 , corresponding to a Coulombic efficiency of only 40.5%; after 100 cycles, the electrode remains a reversible discharge capacity of 78 mA h g −1 with a fading rate of only 0.09% per cycle compared with the 2 nd cycle discharge capacity. The sodium ion storage mechanism was investigated, illustrating that the large irreversible capacity loss in the first cycle can be attributed to the initially formed single-crystalline α'-Na x V 2 O 5 (0.02 < x < 0.88), in which sodium ions cannot be electrochemically extracted and the α'-Na 0.88 V 2 O 5 can reversibly host and release sodium ions via a single-phase (solid solution) reaction, leading to excellent cycling stability. The Na + diffusion coefficient in α'-Na x V 2 O 5 ranges from 10 −12 to 10 −11.5 cm 2 s −1 as evaluated by galvanostatic intermittent titration technique (GITT).

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“…The process, which is efficient, fast, and provides a high yield, can be scaled-up to produce about 50 g. [57] Drop-casting of an aqueous suspension of the nanosheet onto hydrophobic substrates, such as CNT paper, has been found to produce a surface layer of V 2 O 5 ⋅ nH 2 O on a CNT paper. [20] Although V 2 O 5 ⋅ nH 2 O nanosheets have previously been used as electrode materials for lithium and sodium-ion batteries, [11,20,23] the accessible capacity was found to depend on the electrode manufacturing method. There is, therefore, a need to explore the use of other hydrophilic substrates facilitating the attainment of a conformal distribution of the nanosheets.…”

Section: Introductionmentioning

confidence: 99%

On the Capacities of Freestanding Vanadium Pentoxide–Carbon Nanotube–Nanocellulose Paper Electrodes for Charge Storage Applications

et al. 2020

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Herein, a one‐step protocol for synthesizing freestanding 20 μm thick cellulose paper electrodes composed of V2O5 ⋅ H2O nanosheets (VOx), carbon nanotubes (CNTs), and Cladophora cellulose (CC) is reported. In 1.0 m Na2SO4, the VOx–CNT–CC electrodes deliver capacities of about 200 and 50 C g−1 at scan rates of 20 and 500 mV s−1, respectively. The obtained capacities are compared with the theoretical capacities and are discussed based on the electrochemical reactions and the mass loadings of the electrodes. It is shown that the capacities are diffusion rate limited and, consequently, depend on the distribution and thickness of the V2O5 ⋅ H2O nanosheets, whereas the long‐term cycling stabilities depend on vanadium species dissolving in the electrolyte. The electrodes feature high mass loadings (2 mg cm−2), good rate performances (25% capacity retention at 500 mV s−1), and capacity retentions of 85% after 8000 cycles. A symmetric VOx–CNT–CC energy storage device with a potential window of about 1 V exhibits a capacity of 40 C g−1 at a scan rate of 2 mV s−1.

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V2O5·nH2O nanosheets and multi-walled carbon nanotube composite as a negative electrode for sodium-ion batteries

Cited by 28 publications

References 33 publications

Acetonitrile‐Based Electrolytes for Rechargeable Zinc Batteries

Acetonitrile‐Based Electrolytes for Rechargeable Zinc Batteries

Sodium ion storage performance and mechanism in orthorhombic V2O5 single-crystalline nanowires

On the Capacities of Freestanding Vanadium Pentoxide–Carbon Nanotube–Nanocellulose Paper Electrodes for Charge Storage Applications

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