V<sub>2</sub>O<sub>5</sub> Nano‐Electrodes with High Power and Energy Densities for Thin Film Li‐Ion Batteries

Liu, Yanyi; Clark, Michael P.; Zhang, Zuo‐Feng; Yu, Danmei; Liu, Dawei; Li, Jun; Cao, Guangmin

doi:10.1002/aenm.201000037

Cited by 220 publications

(154 citation statements)

References 71 publications

(112 reference statements)

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“…Interestingly, during the sonication process, the orange mixture was gradually transformed into a transparent red solution associated with vigorous bubbles. 18,19 This phenomenon should be derived from the following complicated chemical reactions of V 2 O 5 with H 2 O 2 , similar to that reported in previous literature.…”

Section: * S Supporting Informationmentioning

confidence: 96%

Building 3D Structures of Vanadium Pentoxide Nanosheets and Application as Electrodes in Supercapacitors

et al. 2013

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Various two-dimensional (2D) materials have recently attracted great attention owing to their unique properties and wide application potential in electronics, catalysis, energy storage, and conversion. However, largescale production of ultrathin sheets and functional nanosheets remains a scientific and engineering challenge. Here we demonstrate an efficient approach for large-scale production of V 2 O 5 nanosheets having a thickness of 4 nm and utilization as building blocks for constructing 3D architectures via a freezedrying process. The resulting highly flexible V 2 O 5 structures possess a surface area of 133 m 2 g −1, ultrathin walls, and multilevel pores. Such unique features are favorable for providing easy access of the electrolyte to the structure when they are used as a supercapacitor electrode, and they also provide a large electroactive surface that advantageous in energy storage applications. As a consequence, a high specific capacitance of 451 F g −1 is achieved in a neutral aqueous Na 2 SO 4 electrolyte as the 3D architectures are utilized for energy storage. Remarkably, the capacitance retention after 4000 cycles is more than 90%, and the energy density is up to 107 W·h·kg −1 at a high power density of 9.4 kW kg −1 . KEYWORDS: 2D layers, V 2 O 5 , 3D architectures, high energy density, supercapacitor S upercapacitors, also called electrochemical capacitors or ultracapacitors, are extensively studied as they complement lithium-ion batteries due to their high power density, fast delivery rate, and long lifespan. However, the low energy density of supercapacitors largely obstructs the way of their applications as standalone devices. The energy density (E) of a supercapacitor is determined by its specific capacitance (C) and the cell voltage (V) according to the equation of E = 1/2CV 2 . 1,2Thus, improving the specific capacitance of electrode materials is an efficient way to achieve supercapacitors with a high energy density. Generally, high-capacitance electrode materials possess a high surface area and good electrical conductivity since these properties are strongly related to the electrochemical double layer capacitance or electroactive surface for redox-reactions, resulting in pseudocapacitance within an electrode. To date, a large number of high-surface-area carbonaceous materials such as activated carbon, carbon nanotubes, and graphene have been employed as electrode materials for supercapacitors.3−7 In particular, it was shown that graphene, a 2D monolayer of carbon atoms, is an excellent building block for constructing 3D architectures having improved electrochemical performance advantageous for energy storage devices. 6,8 However, these carbon-based electrochemical double-layer capacitors have a low capacitance, especially at high charge/ discharge rates. Metal oxides and hydroxides overcome these limitations of carbon and commonly exhibit high capacitance for energy storage owing to their more efficient energy storage mechanism, and they have potential to be the electrode materia...

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Section: * S Supporting Informationmentioning

confidence: 96%

Building 3D Structures of Vanadium Pentoxide Nanosheets and Application as Electrodes in Supercapacitors

et al. 2013

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“…And transition metals have been found to have the capability to accomplish this as they can react with more than one lithium ions per redox ion [26]. Recently, a variety of cathode materials such as LiFeO 4, [9,27,28] LiFePO 4 [27,29,30] and LiMn 2 O 4 [31e34] have been reported to have advantages over LiCoO 2 but they still deliver limited capacities in the range of 100e170 mAhg À1 leading to LIBs specific energy densities of~200 Whkg À1 [26]. Therefore, many other efforts are pressingly required to develop high energy and high power cathode materials to further enhance the LIBs energy densities for large scale EV and renewable energy storage applications [3,19,35].…”

Section: Introductionmentioning

confidence: 99%

Hierarchical 3D micro-/nano-V2O5 (vanadium pentoxide) spheres as cathode materials for high-energy and high-power lithium ion-batteries

Bai

Liu

Sun

et al. 2014

Energy

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“…Li-ion batteries are comprised of three primary components such as cathode, anode and electrolyte. The most commercially popular cathode materials such as lithium cobalt oxide (LiCoO 2 ) [7], lithium manganese oxide (LiMn 2 O 4 ) [8], lithium iron phosphate (LiFePO 4 ) [9][10][11], vanadium oxide (VO 2 ) [12], vanadium pentoxide (V 2 O 5 ) [13][14][15], lithium trivanadate (LiV 3 O 8 ) [16,17] are used in Li-ion batteries. Recently, researchers are trying to develop the cost effective electrode materials such as manganese oxide (MnO 2 ) [18][19][20][21], titanium oxide (TiO 2 ) [22][23][24][25][26][27][28][29][30], molybdenum dioxide (MoO 2 ) [31] and graphite to use as anode materials in Li-ion batteries.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of nanostructured lithium titanate by simple peroxo route

Selvamurugan

Hirankumar²,

Karuppuchamy

2016

J Mater Sci: Mater Electron

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Li 4 Ti 5 O 12 nanopowder was successfully synthesized by simple peroxo-solution growth technique. The physicochemical properties of synthesized powders were studied by powder X-ray diffraction spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy and Scanning electron microscopy. The effect of calcination on structure, morphology and the electrochemical performances of Li 4 Ti 5 O 12 have also been investigated. The electrochemical property of the Li 4 Ti 5 O 12 was analyzed by galvanostatic charge/discharge test. The storage capacity of 90.27 mAh g -1 was achieved for Li 4 Ti 5 O 12 nanopowder.

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V₂O₅ Nano‐Electrodes with High Power and Energy Densities for Thin Film Li‐Ion Batteries

Abstract: 1.3 C). When discharge/charge is carried out at a high current density of 10.5 A g − 1 (70 C), the thin fi lm electrodes retain a good discharge capacity of 120 mA h g − 1 , and the specifi c power density is over 28 kW kg − 1 .

Cited by 220 publications

References 71 publications

Building 3D Structures of Vanadium Pentoxide Nanosheets and Application as Electrodes in Supercapacitors

Building 3D Structures of Vanadium Pentoxide Nanosheets and Application as Electrodes in Supercapacitors

Hierarchical 3D micro-/nano-V2O5 (vanadium pentoxide) spheres as cathode materials for high-energy and high-power lithium ion-batteries

Synthesis and characterization of nanostructured lithium titanate by simple peroxo route

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V2O5 Nano‐Electrodes with High Power and Energy Densities for Thin Film Li‐Ion Batteries

Abstract: 1.3 C). When discharge/charge is carried out at a high current density of 10.5 A g − 1 (70 C), the thin fi lm electrodes retain a good discharge capacity of 120 mA h g − 1 , and the specifi c power density is over 28 kW kg − 1 .

Cited by 220 publications

References 71 publications

Building 3D Structures of Vanadium Pentoxide Nanosheets and Application as Electrodes in Supercapacitors

Building 3D Structures of Vanadium Pentoxide Nanosheets and Application as Electrodes in Supercapacitors

Hierarchical 3D micro-/nano-V2O5 (vanadium pentoxide) spheres as cathode materials for high-energy and high-power lithium ion-batteries

Synthesis and characterization of nanostructured lithium titanate by simple peroxo route

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V₂O₅ Nano‐Electrodes with High Power and Energy Densities for Thin Film Li‐Ion Batteries