Synthesis of novel ammonium vanadium bronze (NH4)0.6V2O5 and its application in Li-ion battery

Ma, Yining; Ji, Shidong; Zhou, Huaijuan; Zhang, Shuming; Li, Rong; Zhu, Jingting; Li, Wenjing; Guo, Hehe; Jin, Ping

doi:10.1039/c5ra18074k

Cited by 28 publications

(11 citation statements)

References 30 publications

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“…XPS analysis was also performed to investigate the oxidation state of vanadium. The XPS spectrum of the V 2p 3/2 peak (Figure S5) is composed of two peaks at 516.5 and 517.7 eV as well, corresponding to V 4+ and V 5+ , respectively . The average valence of vanadium is +4.80, close to the valance state of the sample before annealing process, suggesting that no transfer of electron occurred through thermal treatment, which is different from previous experimental finding of β‐Li x V 2 O 5 …”

Section: Resultscontrasting

confidence: 69%

“…To further identify the oxidation state of vanadium in δ‐Ca 0.24 V 2 O 5 ⋅ H 2 O, an X‐ray photoelectron spectroscopy measurement was carried out and the result is shown in Figure S2. The XPS spectrum of the V 2p 3/2 peak consists of two peaks at 516.5 and 517.7 eV, corresponding to V 4+ and V 5+ , respectively, which confirms the presence of mixed‐valence vanadium bronze . The average valence of vanadium is +4.79 calculated from XPS data by their peak area ratios, which is close to the valance state of V in δ‐Ca 0.24 V 2 O 5 ⋅ H 2 O.…”

Section: Resultssupporting

confidence: 57%

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Long Straczekite δ‐Ca_0.24V₂O₅⋅H₂O Nanorods and Derived β‐Ca_0.24V₂O₅ Nanorods as Novel Host Materials for Lithium Storage with Excellent Cycling Stability

Zhou

Zhang

et al. 2017

Chemistry A European J

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Nanorods of δ-Ca V O ⋅H O, a straczekite group mineral with an open double-layered structure, have been successfully fabricated by a facile hydrothermal method and can be transformed into the tunnel β geometry (β-Ca V O ) through a vacuum annealing treatment. The generated β-Ca V O still preserves the nanorod construction of δ-Ca V O ⋅H O without substantial sintering and degradation of the nanostructure. As cathode materials, both calcium vanadium bronzes exhibit high reversible capacity, good rate capability, as well as superior cyclability. Compared with the hydrated vanadium bronze, the β-Ca V O nanorods show better cycling performance (81.68 and 97.93 % capacity retention after 200 cycles at 100 and 400 mA g , respectively) and excellent long-term cyclic stability with an average decay of 0.035 % per cycle over 500 cycles at 500 mA g . Note that the double-layered δ-Ca V O ⋅H O electrode irreversibly converts into β-Ca V O phase during the initial Li insertion/extraction process, while in contrast, the β-phase calcium vanadium bronze electrode shows excellent structural stability during cycling. The excellent electrochemical performance demonstrates that the two calcium vanadium bronzes are potential cathode candidates for rechargeable lithium-ion batteries.

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Section: Resultscontrasting

confidence: 69%

Section: Resultssupporting

confidence: 57%

Long Straczekite δ‐Ca_0.24V₂O₅⋅H₂O Nanorods and Derived β‐Ca_0.24V₂O₅ Nanorods as Novel Host Materials for Lithium Storage with Excellent Cycling Stability

Zhou

Zhang

et al. 2017

Chemistry A European J

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“…The HNVO also showed the diffraction peaks of a pure phase and was indexed to a monoclinic phase of NaV 6 O 15 (JCPDS No. [39] The band at 278 cm −1 presents the VO bending vibration modes. [36,37] From these observations, the samples synthesized using K 2 S 2 O 8 and Na 2 S 2 O 8 show a considerable influence on the cation in V 2 O 5 phase by forming a new phase or an additional mixed crystalline phase.…”

Section: Resultsmentioning

confidence: 99%

“…The major peak at 143 cm −1 was associated with the vibrations of V-O-V chains, and it indicates the formation of V 2 O 5 layered structure. [39] The band at 278 cm −1 presents the VO bending vibration modes. [40] The Raman modes observed at 405 and 689 cm −1 in the AVO sample represent the stretching mode of triply coordinated oxygen (V 3 O) and doubly coordinated oxygen (VOV) bonds respectively.…”

Section: Resultsmentioning

confidence: 99%

Vanadium Pentoxide with H₂O, K⁺, and Na⁺ Spacer between Layered Nanostructures for High‐Performance Symmetric Electrochemical Capacitors

Manikandan

Raj

Rajesh

et al. 2018

Adv Materials Inter

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batteries and the power density similar to the electric double-layer capacitors. [1][2][3][4] Generally, the transition metal oxides and conducting polymers are used as the pseudocapacitor electrode materials, [3] since it stores electric charges based on the Faradaic and non-Faradaic reactions arising at the interface of electrode/electrolyte. [5] Several transition metal oxides, metal sulfides, and metal hydroxides have been displayed to be appropriate for the electrodes of supercapacitors. [6] Mostly, transition metal oxides (e.g., RuO 2 , MnO 2 , NiO, and V 2 O 5 ) are widely utilized as the electrode material to attain pseudocapacitive energy storage property due to their multivalence oxidation states. [7] Among the various metal oxides, vanadium pentoxide (V 2 O 5 ) is reflected to be the most capable candidate for pseudocapacitor owing to its natural abundance and existence of variable oxidation states from +2 to +5 (VO, V 2 O 3 , VO 2 , and V 2 O 5 ). [8] In addition, V 2 O 5 possess a higher theoretical capacitance value of ≈2120 F g −1 under a considerable potential window of 1 V, and this is recognized to the higher oxidation state of vanadium to transfer more than one electron instantly. [9,10] So, vanadium pentoxide nanostructures have been the most regarded materials in various applications, [11] such as batteries, [12][13][14] supercapacitors, [15,16] catalyst, [17] optical switching, [18] and energy-saving devices. [19] In supercapacitors, apart from the electrical/electrochemical properties, the specific capacitance of vanadium oxide also depends upon the morphology and synthesis techniques. [20] Recently, different types of nanostructured V 2 O 5 such as nanowires, [21] nanoribbons, [22] nanorods, [23] nanoplatelets, [24] and nanobelts [25] have been applied for supercapacitor electrodes. [26] Moreover, various synthetic methods such as hydrothermal/solvothermal, thermal decomposition, chemical vapor deposition, microwave-assisted synthesis, and sol-gel [27,28] methods have been adopted for the fabrication of different forms of vanadium oxide nanostructures. Among various synthesis techniques, the hydrothermal method is a low-cost, environmentally friendly, and widely used technique for the development of inorganic nanostructures. The hydrothermal method is a scalable and simple method, retaining autoclaves at lower operational temperatures with Vanadium oxide 2D layered nanostructures with the hydrous form of potassium (K + ) and sodium (Na + ) are synthesized via hydrothermal reaction between VOSO 4 · xH 2 O and different persulfate oxidants ((NH 4 ) 2 S 2 O 8 , K 2 S 2 O 8 , and Na 2 S 2 O 8 ). The physicochemical characterization suggests that the synthesized V 2 O 5 · 3H 2 O nanostructures possess layered morphology with considerable amount of water molecules accommodated between the interlayer spacing of nanostructures. Moreover, samples obtained using K 2 S 2 O 8 and Na 2 S 2 O 8 oxidants have K + (6.41%) and Na + (0.38%) ions intercalated on the 2D nanostructure along with the water mole...

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“…Ammonium metavanadate (NH 4 VO 3 ) plays an important role in the preparation and purification of vanadium compounds, including, for example, NH 4 V 3 O 8 , NH 4 V 4 O 10, (NH 4 ) 0.6 V 2 O 5 , and V 2 O 5, V 6 O 13 [1,2,3,4,5,6,7]. These vanadium oxides and their derivatives are of huge interest, mainly due to their Li-ion intercalation properties.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Size and Shape—New Path for Ammonium Metavanadate Synthesis

et al. 2019

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Ammonium metavanadate, NH4VO3, plays an important role in the preparation of vanadium oxides and other ammonium compounds, such as NH4V3O8, (NH4)2V3O8, and NH4V4O10, which were found to possess interesting electrochemical properties. In this work, a new route for the synthesis of NH4VO3 is proposed by mixing an organic ammonium salt and V2O5 in a suitable solvent. The one-step procedure is carried out at room temperature. Additionally, the need for pH control and use of oxidants necessary in known methods is eliminated. The mechanism of the NH4VO3 formation is explained. It is presented that it is possible to tailor the morphology and size of the obtained NH4VO3 crystals, depending on the combination of reagents. Nano- and microcrystals of NH4VO3 are obtained and used as precursors in the hydrothermal synthesis of higher ammonium vanadates. It is proven that the size of the precursor particles can significantly affect the physical and chemical properties of the resulting products.

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Synthesis of novel ammonium vanadium bronze (NH₄)_0.6V₂O₅ and its application in Li-ion battery

Abstract: A novel ammonium vanadium bronze (NH4)0.6V2O5 has been successfully synthesized via a simple hydrothermal treatment and its electrochemical performance is investigated.

Cited by 28 publications

References 30 publications

Long Straczekite δ‐Ca_0.24V₂O₅⋅H₂O Nanorods and Derived β‐Ca_0.24V₂O₅ Nanorods as Novel Host Materials for Lithium Storage with Excellent Cycling Stability

Long Straczekite δ‐Ca_0.24V₂O₅⋅H₂O Nanorods and Derived β‐Ca_0.24V₂O₅ Nanorods as Novel Host Materials for Lithium Storage with Excellent Cycling Stability

Vanadium Pentoxide with H₂O, K⁺, and Na⁺ Spacer between Layered Nanostructures for High‐Performance Symmetric Electrochemical Capacitors

Tailoring the Size and Shape—New Path for Ammonium Metavanadate Synthesis

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Synthesis of novel ammonium vanadium bronze (NH4)0.6V2O5 and its application in Li-ion battery

Abstract: A novel ammonium vanadium bronze (NH4)0.6V2O5 has been successfully synthesized via a simple hydrothermal treatment and its electrochemical performance is investigated.

Cited by 28 publications

References 30 publications

Long Straczekite δ‐Ca0.24V2O5⋅H2O Nanorods and Derived β‐Ca0.24V2O5 Nanorods as Novel Host Materials for Lithium Storage with Excellent Cycling Stability

Long Straczekite δ‐Ca0.24V2O5⋅H2O Nanorods and Derived β‐Ca0.24V2O5 Nanorods as Novel Host Materials for Lithium Storage with Excellent Cycling Stability

Vanadium Pentoxide with H2O, K+, and Na+ Spacer between Layered Nanostructures for High‐Performance Symmetric Electrochemical Capacitors

Tailoring the Size and Shape—New Path for Ammonium Metavanadate Synthesis

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Synthesis of novel ammonium vanadium bronze (NH₄)_0.6V₂O₅ and its application in Li-ion battery

Long Straczekite δ‐Ca_0.24V₂O₅⋅H₂O Nanorods and Derived β‐Ca_0.24V₂O₅ Nanorods as Novel Host Materials for Lithium Storage with Excellent Cycling Stability

Long Straczekite δ‐Ca_0.24V₂O₅⋅H₂O Nanorods and Derived β‐Ca_0.24V₂O₅ Nanorods as Novel Host Materials for Lithium Storage with Excellent Cycling Stability

Vanadium Pentoxide with H₂O, K⁺, and Na⁺ Spacer between Layered Nanostructures for High‐Performance Symmetric Electrochemical Capacitors