Towards the understanding of poor electrochemical activity of triclinic LiVOPO4: Experimental characterization and theoretical investigations

Yang, Yong; Fang, Haisheng; Zheng, Jing; Li, Guangshe; Yan, Guofeng

doi:10.1016/j.solidstatesciences.2008.01.028

Cited by 61 publications

(61 citation statements)

References 18 publications

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“…A competitive alternative to Fe and Mn based phosphates could be found through the lithiated vanadyl phosphates, namely LiVOPO4 [460][461][462][463], the fluorinated derivative LiVPO4F [464,465], and Li3V2(PO4)3 . LiVOPO4 which crystallises in two electrochemically active α-(triclinic) and β-(orthorhombic) forms, has a theoretical capacity of 166 mA h g -1 and through a ~3.9 V operating voltage, may yield specific energy densities in excess of ~640 Wh kg -1 .…”

Section: Other Transition Metal Phosphates (Limpo4)mentioning

confidence: 99%

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

et al. 2013

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Access to the full text of the published version may require a subscription. Rights © Tsinghua University Press and Springer-Verlag Berlin ABSTRACTThe performance of the lithium-ion cell is heavily dependent on the ability of the host electrodes to accommodate and release Li + ions from the local structure. While the choice of electrode materials may define parameters such as cell potential and capacity, the process of intercalation may be physically limited by the rate of solid-state Li + diffusion. Increased diffusion rates in lithium-ion electrodes may be achieved through a reduction in the diffusion path, accomplished by a scaling of the respective electrode dimensions.In addition, some electrodes may undergo large volume changes associated with charging and discharging, the strain of which, may be better accommodated through nanostructuring. Failure of the host to accommodate such volume changes may lead to pulverisation of the local structure and a rapid loss of capacity. In this review article, we seek to highlight a number of significant gains in the development of nanostructured lithium-ion battery architectures (both anode and cathode), as drivers of potential next-generation electrochemical energy storage devices.

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Section: Other Transition Metal Phosphates (Limpo4)mentioning

confidence: 99%

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

et al. 2013

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“…6(b), there are four plateaus around 3.71 (A 1 ), 3.82 (A 2 ), 4.26 (A 3 ), and 4.64 (A 4 ) V, which correspond to a sequence of phase transition processes between the single-phase reaction (solid-state behavior) of Li x V 2 (PO 4 ) 3 (x¼ 3.0, 2.5, 2.0, 1.0, and 0). In contrast, in the discharge process, there are three peaks around 3.81 (B 1 ), 3.70 (B 2 ), and 3.48 (B 3 ) V corresponding to a sequence of phase transition processes between the two-phase reaction of Li x V 2 (PO 4 ) 3 (x¼ 2, 2.5, and 3) [25]. Compared with LiVOPO 4 , the cyclic performance of Li 3 V 2 (PO 4 ) 3 -GNF was changed dramatically.…”

Section: Resultsmentioning

confidence: 98%

Enhanced electrochemical performance of Li3V2(PO4)3 structurally converted from LiVOPO4 by graphite nanofiber addition

Nguyen

Wang

2015

Ceramics International

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“…As an indirect transition semiconductor [15], the n value of LVPS is 4 in the case. Thus, the band gaps of LVPS and ALVPS were estimated from the onset of the absorption edge as approximately 2.24 and 1.89 eV, respectively.…”

Section: Drs Analysismentioning

confidence: 99%

Photocatalytic degradation of fipronil in water by silver-modified lithium vanadium phosphate spheres under visible light irradiation

et al. 2015

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A novel visible light-driven photocatalyst, lithium vanadium phosphate sphere (LVPS), was prepared by a ball-milling method. For enhancing the photocatalytic performance, LVPS was further modified with silver (ALVPS) by a UV-light photoreduction method. After modification, the crystalline phase of LVPS did not change, however, the UV-Vis diffuse reflectance spectrum of ALVPS was extended to 656 nm, which greatly improved its photoabsorptivity for visible light and enhanced its electron donating capacity. Under the irradiation of sunlight or visible light (>400 nm), ALVPS can rapidly remove fipronil (a persistent organic pollutant, 5 mg L 1 ) from aqueous solution. More than 99.7% of fipronil was removed by ALVPS after 0.5 h of irradiation, yielding a much higher removal rate than those achieved by nano-TiO 2 and Bi 2 O 3 . Photo-generated carrier trapping experiments were conducted to elucidate the photocatalytic degradation mechanism further. Hydrogen peroxide and potassium bromate suppressed the photocatalytic activity of ALVPS, while superoxide dismutase and sodium azide reinforced it, verifying that photo-generated electrons played a key role in the photochemical reaction. lithium vanadium phosphate, sphere, visible light irradiation, photocatalysis, degradation

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Towards the understanding of poor electrochemical activity of triclinic LiVOPO4: Experimental characterization and theoretical investigations

Cited by 61 publications

References 18 publications

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

Enhanced electrochemical performance of Li3V2(PO4)3 structurally converted from LiVOPO4 by graphite nanofiber addition

Photocatalytic degradation of fipronil in water by silver-modified lithium vanadium phosphate spheres under visible light irradiation

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