Single crystalline VO2 nanosheets: A cathode material for sodium-ion batteries with high rate cycling performance

Wang, Wei; Jiang, Bo; Hu, Liwen; Lin, Zheshuai; Hou, Jungang; Jiao, Shuqiang

doi:10.1016/j.jpowsour.2013.11.016

Cited by 82 publications

(67 citation statements)

References 55 publications

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“…Jiao and co-workers for the first time synthesized single-crystalline VO 2 (B) parallel ultrathin nanosheets for the cathode material in SIBs via a simple hydrothermal method. [28] As the number of the inserted Na + ions increases from 0 to 1.0, the formation energy gets lower, implying the formation of the more stable phase. As the number of inserted Na + ions excess 1.0, the formation energy of Na x VO 2 becomes more positive compared with NaVO 2 , and on this occasion, the discharge process cannot take place spontaneously [ Fig.…”

Section: Vomentioning

confidence: 99%

“…Various novel VO 2 (B) nanostructures have been reported, such as VO 2 (B) nanospheres, [23] nanowires, [24] nanosheets, [25] nanowires assembled hollow spheres, [26] and micro/nano-structured nanoparticles. [27] It should be noted that, in a typical heat treatment or solution reaction process, VO 2 (B) trends to transform into monoclinic phase VO 2 (M) The reaction during charge/discharge can happen between Na 0.3 VO 2 and NaVO 2 [28] Graphene quantum dots coated VO 2 arrays 306 mA h/g at 100 mA/g A capacity of more than 110 mA h/g after 1500 cycles at 18 A/g A binder-free cathode by bottom-up growth of biface VO 2 arrays directly on a graphene network was achieved [29] Carbon quantum dots coated VO 2 nanowires 328 mA h/g at 0.3 C A capacity of 133 mA h/g even at the rate of 60 C…”

Section: Vomentioning

confidence: 99%

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Nanostructured layered vanadium oxide as cathode for high-performance sodium-ion batteries: a perspective

2017

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Sodium-ion batteries (SIBs) have received intensive attentions owing to the abundant and inexpensive sodium (Na) resource. Layered vanadium oxides are featured with various valence states and corresponding compounds, and through multi-electron reaction they are capable to deliver high Na storage capacity. The rational construction of unique structures is verified to improve their Na storage properties. This perspective provides an overview of recent advances in layered vanadium oxide for SIBs, with a particular focus on construction of novel nanostructures, and mechanism studies via in situ characterization. Finally, we predict possible breakthroughs and future trends that lie ahead for high-performance layered vanadium oxides SIBs cathode.

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Section: Vomentioning

confidence: 99%

Section: Vomentioning

confidence: 99%

Nanostructured layered vanadium oxide as cathode for high-performance sodium-ion batteries: a perspective

2017

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“…[32][33][34] Vanadium oxide has been long regarded as an encouraging cathode for SIBs due to its satisfactory capacity, outstanding structural flexibility, low cost, and abundant sources. [35,36] Of the various known vanadium oxides, metastable vanadium dioxide VO 2 (B) stands out because of its unique layered structure built-up from edge-and corner-sharing distorted VO 6 octahedra, allowing rapid diffusion of sodium ions and insertion into the VO 2 tunnels. Figure 2a shows the calculated formation energy against the number of sodium ions in a VO 2 molecule.…”

Section: Metal Oxides Mo Xmentioning

confidence: 99%

“…Figure 2a shows the calculated formation energy against the number of sodium ions in a VO 2 molecule. [35] On increasing the inserted sodium ions from 0 to 1, the more negative formation energy represents the formation of the more stable phase. However, when the content x of Na ions exceeds 1 (e.g., Na 1.25 VO 2 ), the corresponding formation energy is increased compared with the case of NaVO 2, accompanied by a dramatic Na-insertion-caused volume expansion and broken V-O tunnels (Figure 2b).…”

Section: Metal Oxides Mo Xmentioning

confidence: 99%

Advanced Cathode Materials for Sodium‐Ion Batteries: What Determines Our Choices?

et al. 2017

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lithium with cheaper alternatives might make future batteries less susceptible to price fluctuations when the market expands. [5] This concern has in turn spawned a flurry of research activity to look beyond LIB technology. In view of the various rechargeable batteries, sodiumion batteries (SIBs) that consist of a main element of seawater made their presence felt in the battery industry due to their chemical similarity (e.g., only 0.3 V more positive than lithium) but higher abundance compared to lithium, [6] as illustrated in Table 1. SIBs work in the same way as LIBs in that they involve the reversible migration of cations/anions across a separator toward the electrodes to realize voltage-driven electrochemical reactions. [7] The upward trend for sodium-ion battery research is driven by the concern over the scarcity and price rise of lithium. Hence, these major merits, as well as the suitable redox potential (E = 0.3 V vs Li) make the SIB an appropriate choice as a rechargeable battery system.In fact, SIBs started almost in parallel with LIBs in the 1980s but the development of LIBs eventually eclipsed SIBs due to the electrochemical performances of SIBs. [8,9] A major obstacle is that it is difficult to get a sodium host material with comparable operating voltage and capacity as the LIB analogs. Firstly, the larger Na + radius (0.98 Å) than that of Li + (0.69 Å) leads to the kinetically sluggish Na + insertion/extraction and transport cross the host-material framework, which will always make the specific capacity and rate capacity largely degraded. [10] Secondly, the larger volume expansion caused by Na + insertion will also bring a change in the phase and lattice of the host materials, making it difficult to achieve a favorable electrochemical stability compared with the LIB counterparts. [11] In addition, they also suffer from a lower specific energy than LIBs, due to the lower potential and larger atomic weight of sodium. It is still a challenge to build an affordable Na-host materials endowed with a high specific energy (e.g., 500 W h kg −1 in LIBs). [12] Recently, the topic of SIBs was revisited in the hope of exploring possible ways to overcome the concerns about the low energy density and poor cycling life of SIBs.In spite of the above distinct drawbacks, SIBs can actually behave slightly differently in some chemical aspects. For instance, sodium does not react with aluminum, which is contrary to the alloying tendency of lithium. In the commercial market, manufacturers could appreciate this "inertness" to reduce the production cost of batteries by substituting the Among the various energy solutions, lithium-ion batteries (LIBs) play an important role in the process of the transition from fossil fuels to renewables. However, the necessity to replace lithium with cheaper alternatives due to its scarcity has recently attracted great interest to developing sodium-ion batteries (SIBs). Hence, the discovery and development of suitable cathode materials that exhibit high specific capacity, good cycling stabil...

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“…7,8 The vanadium sulfates were applied in vanadium redox flow batteries which proposed by Skyllas-Kazacos et al…”

Section: Short Communicationmentioning

confidence: 99%

Chaotic Phenomenon in Vanadium Redox Flow Battery

Peng¹

2017

IPCSE

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the vanadium compounds during the charging process. Studies were most focused on the materials of electrodes, [13][14][15] and modification of membrane. [16][17][18][19] Few studies had reported the electrochemical behavior of anolyte during the charging process.All chemicals were analytical grade. Water was purified with a water purification system (HMC-WS 10, Korea). The anolyte was composed of VOSO 4 (1 M) and H 2 SO 4 (2 M), and the catholyte was H 2 SO 4 (2 M) with the same volume. The anolyte and catholyte was separated with a Nafion membrane. The anode and cathode used in the experiments was platinum slice (1.5x2 cm) in which no other unexpected side reaction occurred. They were subjected to ultrasonic cleaning in de-ionized water for 30 min to remove residues before testing. Electrochemical tests were carried out on CHI660D electrochemical workstation. The signal of the potential was amplified, and the times series were recorded and transferred to a personal computer. The macro-instability frequency, oscillation period, of the potential-time series were obtained using Matlab.Electrochemical oscillation was observed during the charging process, while the electrochemical tests were carried out on CHI660D electrochemical workstation with the anolyte of 1 M VOSO 4 +2 M H 2 SO 4 , and the catholyte of 2 M H 2 SO 4 at room temperature, the potential-time series was showed in Figure 1. As indicated in Figure 1 the potential was increased quickly and then electrochemical oscillation emerged. After then, the period of the electrochemical oscillation slowly decreased and then stabilized as showed in Figure 2.The power consumption was investigated to reveal the influence of electrochemical oscillation on the charging efficiency. An extra power consume was a result of the electrochemical oscillation.The relative power-consume (PRC) was calculated as PRC= the average power consumption on anode / (Va·Ia), where Va was the potential, Ia was the charging potential. The results were shown in Figure 3. The influence of electrochemical oscillation on the charging efficiency will be enlarge in long-term charging, and much extra power will be consumed. This part of power consumption should exist in practical charging process, even though it is often ignored. It is beneficial for improving the charge efficiency and energy-saving if the electrochemical oscillation could be regulated. The mechanism of the electrochemical oscillation was investigated. During the charging process, the main chemical reactions in the system were described in Equation (1) Short communicationVanadium redox flow battery is an efficient energy-storage system because it's long cycle life, flexible design, high efficiency and fast response time. Chaotic phenomenon (electrochemical oscillation) was first observed during the charging process of the anolyte, and the mechanism was investigated. The largest Lyapunov exponent was applied to characterize the chaotic phenomenon.Vanadium and its compounds are used for manufacturing iron [1][2][3] steel non-fer...

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Single crystalline VO2 nanosheets: A cathode material for sodium-ion batteries with high rate cycling performance

Cited by 82 publications

References 55 publications

Nanostructured layered vanadium oxide as cathode for high-performance sodium-ion batteries: a perspective

Nanostructured layered vanadium oxide as cathode for high-performance sodium-ion batteries: a perspective

Advanced Cathode Materials for Sodium‐Ion Batteries: What Determines Our Choices?

Chaotic Phenomenon in Vanadium Redox Flow Battery

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