Ionic and electronic conductivity in some simple lithium salts

Gaur, Kanchan; Pathak, A. J.; Lal, H. B.

doi:10.1007/bf00551916

Cited by 20 publications

(5 citation statements)

References 17 publications

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“…The conductivity of Li 3 VO 4 solidified melt has been intensively studied by Gaur et al 3 They found that Li 3 VO 4 solidified melt showed two different conduction mechanisms at different temperature regions, a normal phase and a superionic phase. The normal phase corresponds to a lowtemperature region when the sample is in a mixed conduction state: i.e., the conduction mechanism of the sample depends on the motion of both ions and electrons.…”

Section: Resultsmentioning

confidence: 99%

Dielectric properties of Li3VO4 single crystals grown by the Czochralski method

Kim

Jun

Kim

et al. 2003

Journal of Applied Physics

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Section: Resultsmentioning

confidence: 99%

Dielectric properties of Li3VO4 single crystals grown by the Czochralski method

Kim

Jun

Kim

et al. 2003

Journal of Applied Physics

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“…[22][23][24][25][26] Recently, another fast Li-ion conductor, Li 3 VO 4 , has been successfully used to improve the electrochemical performance of LiCoO 2 . 27 It has been shown that the ionic conductivity of Li 3 VO 4 ($10 À4 S m À1 ) is much higher than that of Li 3 PO 4 ($10 À6 S m À1 ), [28][29][30] indicating that it could be another suitable coating material. Therefore, in this work, we prepared Li 3 VO 4 coated Li 1.18 Co 0.15 Ni 0.15 Mn 0.52 O 2 by the sol-gel method.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical performance and thermal stability of Li1.18Co0.15Ni0.15Mn0.52O2 surface coated with the ionic conductor Li3VO4

Bian

et al. 2014

J. Mater. Chem. A

128

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cathode material was prepared by the sol-gel method. The material was coated with the ionic conductor Li 3 VO 4 via direct reaction with NH 4 VO 3 at 350 C. The Li 3 VO 4 coated material had a higher ordered hexagonal layered structure, and less Li + /Ni 2+ cation mixing. The surface of the coated material was composed of Li 3 VO 4 polycrystals, which were impregnated into the bulk of the active material. The surface coating protected the material from contact with CO 2 in the air, thus inhibiting the formation of an Li 2 CO 3 layer. Electrochemical studies showed that the Li 3 VO 4 surface coating improved the activation of Mn 4+ ions, resulting in a high discharge capacity. It also prohibited the growth of a solid electrolyte interface film, and facilitated the charge transfer reactions at the electrode/electrolyte interface, thus improving the rate capability and cycle stability of the material. DSC analysis of the fully charged electrode showed that the temperature of the exothermic peak increased from 205.2 C to 232.8 C, and that the amount of heat that was released was reduced from 807.5 J g À1 to 551.0 J g À1 , highlighting the improved thermal stability of the material after coating with Li 3 VO 4 .

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“…Furthermore, Li 3 VO 4 has high ionic conductivity and has been studied as an ionic conductor for many years. 6,7 In contrast, the electronic conductivity of Li 3 VO 4 is quite low and results in large resistance polarization and poor rate performance. 8 To improve the electrochemical performance, improving the electronic conductivity and reducing the particle size by growing inorganic nanoparticles on graphene has been proved to be an effective approach.…”

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confidence: 99%