Fabrication of Novel Vanadium Dioxide Nanorods as Cathode Material for Rechargeable Lithium Batteries

Chen, Wen; Peng, Junfeng; Mai, Liqiang; Yu, Hongquan; Qi, Yanyuan

doi:10.1246/cl.2004.1366

Cited by 41 publications

(28 citation statements)

References 17 publications

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“…97 Nanorods ͑nanoribbons, nanobelts͒ of this material have been prepared by wet chemical techniques in numerous studies 95,[98][99][100][101][102][103][104][105][106][107][108][109][110][111][112][113][114][115] and the capability for electrochemical lithium insertion has been investigated. VO 2 ͑B͒ is not in itself a good thermochromic material but it can be transformed to thermochromic VO 2 via heat treatment, as has been demonstrated for powders 116,117 and nanorods, 103,118 which means that a large body of work made with battery applications in mind is also of relevance for thermochromics.…”

Section: Discussionmentioning

confidence: 99%

Nanothermochromics: Calculations for VO2 nanoparticles in dielectric hosts show much improved luminous transmittance and solar energy transmittance modulation

Li¹,

Niklasson²,

Granqvist³

2010

Journal of Applied Physics

241

192

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VO 2 -based films are thermochromic and show infrared reflectance above a "critical" temperature in the vicinity of room temperature. Implementations on energy efficient windows have been discussed for decades but have been severely curtailed since the luminous absorptance is undesirably large and the solar energy transmittance modulation is too small. Here we show by calculations based on effective medium theory that dilute composites with VO 2 nanoparticles embedded in hosts with properties mimicking glass or polymer can yield significantly decreased luminous absorption jointly with much enhanced transmittance modulation of solar energy. These results demonstrate that VO 2 -based nanothermochromics opens new avenues toward energy efficient fenestration.

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Section: Discussionmentioning

confidence: 99%

Nanothermochromics: Calculations for VO2 nanoparticles in dielectric hosts show much improved luminous transmittance and solar energy transmittance modulation

Li¹,

Niklasson²,

Granqvist³

2010

Journal of Applied Physics

241

192

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“…Among them, the solution-based strategies seemed to be promising for the large-scale synthesis of VO 2 nanostructures. In the solution-based synthesis, taking the hydrothermal treatment for an example, the influence of different kinds of reductants, such as formic acid [17], oxalic acid [18], ethylene glycol [19], ethanol, borohydride [10], butanol [20], aromatic amines [21] and surfactants [22] such as CTAB on the morphologies of the final products had been reported. However, most of these researches resulted in the formation of VO 2 (B) as the final product.…”

Section: Introductionmentioning

confidence: 99%

Direct formation of single crystal VO2(R) nanorods by one-step hydrothermal treatment

Zhao

Zhang

et al. 2010

Journal of Crystal Growth

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“…102 When they are used as cathode, the resulting cell has shown initial discharge specific capacity of 306 mA h g -1 at 3.6-1.5 V, which value is significantly superior to those obtained with nanoparticles prepared by Kannan et al 56,100 This nanorod can maintain 80% of its initial capacity.…”

Section: Vanadium Oxidesmentioning

confidence: 87%

Cathodes for lithium ion batteries: the benefits of using nanostructured materials

Camilo¹,

Torresi²

2006

J. Braz. Chem. Soc.

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As celas de íon lítio disponíveis comercialmente, as quais são as mais avançadas entre as baterias recarregáveis disponíveis até agora, empregam óxidos de metais de transição microcristalinos como catodos, os quais funcionam como matrizes de inserção de lítio. Em busca por uma melhor performance eletroquímica, o uso de nanomateriais no lugar dos materiais convencionais tem emergido como excelente alternativa. Nesta revisão nós apresentaremos uma breve introdução sobre as motivações de usar materiais nanoestruturados como catodos em baterias de íon-lítio. Para ilustrar tais vantagens apresentamos exemplos de pesquisas relacionadas com a preparação e dados eletroquímicos dos mais usados catodos em nanoescala, tais como LiCoO 2 , LiMn 2 O 4 , LiMnO 2 , LiV 2 O 5 e LiFePO 4 .Commercially available lithium ion cells, which are the most advanced among rechargeable batteries available so far, employ microcrystalline transition metal oxides as cathodes, which function as Li insertion hosts. In search for better electrochemical performance the use of nanomaterials in place of these conventional ones has emerged as excellent alternative. In this review we present a brief introduction about the motivations to use nanostructured materials as cathodes in lithium ion batteries. To illustrate such advantages we present some examples of research directed toward preparations and electrochemical data of the most used cathodes in nanoscale, such as LiCoO 2 , LiMn 2 O 4 , LiMnO 2 , LiV 2 O 5 e LiFePO 4 .Keywords: nanotechnology, lithium-ion battery, cathode, nanoparticles Initial RemarksSince Sony introduced its 18650 cell in 1990, 1 Li-ion batteries with excellent electrochemical performance have been manufactured and occupied a prime position in the market place 2 to power portable and non-portable devices. [3][4][5] The reason for this relevance is that compared to traditional rechargeable batteries such as, lead acid and Ni-Cd, the lithium-ion battery shows several advantages, such as lighter in weight, smaller in dimension and higher energy density. 1 Moreover, although capacity values may be similar to other rechargeable systems, voltages are approximately three times higher, affording higher energy. 1 In general, the commercial lithium-ion batteries use graphite-lithium composite, Li x C 6 , as anode, lithium cobalt oxide, LiCoO 2 , as cathode and a lithium-ion conducting electrolyte. When the cell is charged, lithium is extracted from the cathode and inserted at the anode. On discharge, the lithium ions are released by the anode and taken up again by the cathode (Figure 1).Owing to the importance of lithium ion batteries, these cells are still object of intense research to enhance their properties and characteristics. The searches focus on all aspects of these batteries, including improved anodes, 6-8 cathodes 9-17 and electrolytes. [18][19][20][21][22] However, most of these efforts are concentrated in new cathode materials, since the most used cathode material (LiCoO 2 ) is expensive and is somewhat toxic.The active catho...

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Fabrication of Novel Vanadium Dioxide Nanorods as Cathode Material for Rechargeable Lithium Batteries

Cited by 41 publications

References 17 publications

Nanothermochromics: Calculations for VO2 nanoparticles in dielectric hosts show much improved luminous transmittance and solar energy transmittance modulation

Nanothermochromics: Calculations for VO2 nanoparticles in dielectric hosts show much improved luminous transmittance and solar energy transmittance modulation

Direct formation of single crystal VO2(R) nanorods by one-step hydrothermal treatment

Cathodes for lithium ion batteries: the benefits of using nanostructured materials

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