Na–Li–[V3O8] insertion electrodes: Structures and diffusion pathways

Schindler, Michael; Hawthorne, Frank C.; Alexander, Malcolm A.; Kutluoglu, Rory A.; Mandaliev, Petre; Halden, Norman M.; Mitchell, Roger H.

doi:10.1016/j.jssc.2006.05.009

Cited by 24 publications

(19 citation statements)

References 29 publications

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“…The XRD pattern shown in Figure 4 confirms the formation of the single‐phase monoclinic crystalline NVO phase (space group P 2 1 m ) 39. The refined lattice parameters for NVO‐SNBs and NVO‐HNBs are shown in Table 2.…”

Section: Resultsmentioning

confidence: 67%

Electrospun Single‐Phase Na_1.2V₃O₈ Materials with Tunable Morphologies as Cathodes for Rechargeable Lithium‐Ion Batteries

Teh

Pramana

et al. 2015

ChemElectroChem

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Single‐phase Na1.2V3O8 materials with single and hierarchical nanobelt morphologies were prepared by using a versatile electrospinning technique by altering the sintering profiles. On the basis of characterization by field‐emission scanning electron microscopy and high‐resolution transmission electron microscopy, the formation mechanisms of products with tunable morphologies are discussed. The products obtained are employed as cathode materials for lithium‐ion batteries. Their electrochemical activities are demonstrated through galvanostatic cycling and cyclic voltammetry. The non‐agglomerated, single nanobelts with exposed (100) facets, which serve as channels for facile lithium diffusion, are capable of exhibiting higher maximum capacities of approximately 218 mAh g−1 compared to hierarchical nanobelts with a maximum capacity of approximately 197 mAh g−1 versus Li/Li+ at a current density of 200 mA g−1. Their associated reversible capacities are approximately 207 and 173 mAh g−1, respectively, after 100 cycles. Single nanobelts with individual belt‐like structures and preferred facet orientation also exhibit better rate capabilities.

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Section: Resultsmentioning

confidence: 67%

Electrospun Single‐Phase Na_1.2V₃O₈ Materials with Tunable Morphologies as Cathodes for Rechargeable Lithium‐Ion Batteries

Teh

Pramana

et al. 2015

ChemElectroChem

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“…Previous studies have indicated that even in stoichiometric specimens, there is a slight preferential occupation of V 4+ at preferential vanadium sites. 56 This is also expected as the ideal stoichiometry, Na 1.25 V 3 O 8 , can only be achieved with the presence of some tetravalent vanadium species, but the comparison between the two is still valid because of their concentration differences. An additional feature of interest is the broad peak extending beyond the main O 1s peak in the 532.5 to 535 eV range for the Na-deficient sample that may be attributed to CO(H).…”

Section: ■ Results and Discussionmentioning

confidence: 88%

Elucidating the Role of Defects for Electrochemical Intercalation in Sodium Vanadium Oxide

et al. 2015

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Na 1.25+x V 3 O 8 (with x < 0, = 0, and > 0) was synthesized via a wet chemical route involving the reduction of V 2 O 5 in oxalic acid and NaNO 3 followed by calcination. It was possible to control the sodium composition in the final product by adjusting the amount of sodium precursor added during synthesis. It was revealed that deficient and excessive sodium contents, with respect to the ideal stoichiometry, are accommodated or compensated by the respective generation of oxygen vacancies and partial transition metal reduction, or cation disordering. When examined as NIB electrode material, the superior performance of the cation disordered material with excessive sodium was clearly demonstrated, with more than 50% higher storage capacity and superior rate capacity and cyclic stability. The formation of oxygen vacancies initially seemed promising but was coupled with stability issues and capacity fading upon further cycling. The disparity in electrochemical performance was attributed to variations in the electronic distribution as promoted through Na−ion interactions and the direct influence of such on the oxygen framework (sublattice); these factors were determined to have significant impact on the migration energy and diffusion barriers. ■ INTRODUCTIONThe proliferation of electrical energy demand has driven the rapid progression of improved technologies related to energy distribution and storage. However, energy storage materials and devices have come to be viewed as a crux impeding advanced device development. Lithium-ion (Li-ion) batteries are a mature and robust technology because of their high energy density and portability. Despite their success in such application, Li-ion batteries (LIBs) are a poorly suited choice for large-scale energy storage applications given their high cost, associated with resource scarcity, as well as safety concerns. Conversely, sodium-ion (Na-ion) batteries have been gaining considerable traction as a realistic candidate for large-scale energy storage applications over the past several years.Na-ion batteries (NIB) are attractive because sodium resources are seemingly inexhaustible as well as ubiquitous and, therefore, cost considerably less (by a factor of roughly 30−40 times) than lithium; additionally, sodium does not undergo an alloying reaction with aluminum at low voltage, as is the case with lithium, meaning that aluminum can replace copper as the anodic current collector, which equates to an overall cell cost savings of ∼2%. 1,2 The lower operating voltage of Na-ion cells results in enhanced stability of the nonaqueous electrolyte but also manifests itself in lower energy density. The majority of the proposed electrode materials for Na-ion battery show similar or slightly lower specific capacity and redox potential than when used in Li-ion cells. Moreover, the accommodation of sodium in traditional host materials is difficult because the ionic radius and reduction potential of sodium are strikingly larger than that of lithium. Therefore, the de/sodiation process induces l...

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“…The Nainsertion into this compound was not studied so far, although a mixed Li,Na vanadium oxide with a related structure is known, see Fig. 1b [21]. In a Li,Na-hybrid cell, one could expect mostly Li intercalation because of its smaller ionic radius in comparison to Na + as well as a larger thermodynamic stability of the lithiated phase compared to the sodiated one, because of the larger repulsion between the Na and Li ions in the NaLiV 3 O 8 structure than in Li 2 V 3 O 8 . )…”

Section: Introductionmentioning

confidence: 99%

“…Upon lithiation, the lattice parameters a and b noticeably increase, while the parameter c slightly decreases. b) Monoclinic structures of Li 0.7 Na 0.7 V 3 O 8[21]. The grey and brown spheres are lithium and sodium cations, respectively; vanadium cations are inside the green polyhedra.…”

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Electrochemical behavior of LiV3O8 positive electrode in hybrid Li,Na–ion batteries

Maletti

Sarapulova

Tsirlin

et al. 2018

Journal of Power Sources

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Na–Li–[V3O8] insertion electrodes: Structures and diffusion pathways

Cited by 24 publications

References 29 publications

Electrospun Single‐Phase Na_1.2V₃O₈ Materials with Tunable Morphologies as Cathodes for Rechargeable Lithium‐Ion Batteries

Electrospun Single‐Phase Na_1.2V₃O₈ Materials with Tunable Morphologies as Cathodes for Rechargeable Lithium‐Ion Batteries

Elucidating the Role of Defects for Electrochemical Intercalation in Sodium Vanadium Oxide

Electrochemical behavior of LiV3O8 positive electrode in hybrid Li,Na–ion batteries

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Na–Li–[V3O8] insertion electrodes: Structures and diffusion pathways

Cited by 24 publications

References 29 publications

Electrospun Single‐Phase Na1.2V3O8 Materials with Tunable Morphologies as Cathodes for Rechargeable Lithium‐Ion Batteries

Electrospun Single‐Phase Na1.2V3O8 Materials with Tunable Morphologies as Cathodes for Rechargeable Lithium‐Ion Batteries

Elucidating the Role of Defects for Electrochemical Intercalation in Sodium Vanadium Oxide

Electrochemical behavior of LiV3O8 positive electrode in hybrid Li,Na–ion batteries

Contact Info

Product

Resources

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Electrospun Single‐Phase Na_1.2V₃O₈ Materials with Tunable Morphologies as Cathodes for Rechargeable Lithium‐Ion Batteries

Electrospun Single‐Phase Na_1.2V₃O₈ Materials with Tunable Morphologies as Cathodes for Rechargeable Lithium‐Ion Batteries