Pomegranate-like Li 3 VO 4 /3D graphene networks nanocomposite as lithium ion battery anode with long cycle life and high-rate capability

Optimization of Rate Capability and Cyclability Performance in Li3VO4 Anode Material through Ca Doping

“…The much smaller R SEI values of the Li 2.97 Ca 0.03 VO 4 electrodes uggest that Ca doped into LVO might protect the materialf rom side reactions with the electrolyte, forming a thinner SEI film. [21] The decreased R ct value indicates an improvement in the kinetics of Li + diffusion and charger-transfer reactions, and ac onsequent increasei ne lectrochemical performance in the Ca-doped electrodes, as mentioned previously. The lower R ct value for Li 2.97 Ca 0.03 VO 4 can be attributed to the influenceo fC a 2 + on the lattice expansion and ionic transfer from V 5 + into V 4 + owing to the charge balance.…”

“…To describe the variation of R SEI and R ct quantitatively, we fitted the EIS patterns using Zsimpwin software; the obtained parameters are listed in Table . The much smaller R SEI values of the Li 2.97 Ca 0.03 VO 4 electrode suggest that Ca doped into LVO might protect the material from side reactions with the electrolyte, forming a thinner SEI film . The decreased R ct value indicates an improvement in the kinetics of Li + diffusion and charger‐transfer reactions, and a consequent increase in electrochemical performance in the Ca‐doped electrodes, as mentioned previously.…”

“…[13] Motivatedb yt hese advantages, al ot of work has been undertaken on this new anodem aterial, especially with regard to the problem of the poor rate capability induced by the rather low electronic conductivity and larger polarization. In this aspect, several attempts have been undertakeni nt he past few years,i nvolving methodss uch as controlling the oxygen vacancies of the LVO material, [14] reducing the particles ize of LVOo rp reparing nanostructured LVOw ith various morphologies (hollow, ultrathin nanoribbon, or porous structures), [5,[15][16][17][18][19] making LVOc omposites with high-conductivity materials such as graphite, [20] graphene oxide, [21,22] reduced graphene oxide, [23] natural graphite, [24] multiwalled carbon nanotubes, [25] or nickel metal, [26,27] coating carbon or modified carbon on the surface of LVO, [1,4,[28][29][30] and so on. In some cases, the carbon coating and nanotechnology are used in combination to improvet he electrochemical performance of LVO.…”

Vanadate‐Based Materials for Li‐Ion Batteries: The Search for Anodes for Practical Applications

“…By adding hydroxylated carbon nanotubes in the reaction system, Li 3 VO 4 /CNT composite can be obtained . Similar method was adopted to fabricate Li 3 VO 4 /G composite by Jin et al Besides, solvothermal approaches are also developed to synthesize Li 3 VO 4 nanostructures. For instance, Li 3 VO 4 /rGO hollow spheres were prepared via an oil bath method using NV 4 VO 3 and LiOH·H 2 O as starting materials and EG as solvent, followed by water etching (see Figure c for the formation schematic) .…”

Vanadium-based anode materials (Li3VO4 and VS4) for lithium ion batteries

“…Based on the literature review, for the LVO, the research is much focus on reducing the particle size, enhancing the electrical conductivity and ionic conductivity. The particle size can be reduced by using various synthesis methods, such as hydrothermal [101,102], impregnation [103,104], solvothermal [56,105,106], solution-based [55,107], electrospinning [108], template synthesis [109], ultrasonic spray pyrolysis [110,111], ultracentrifugation [112], aerosol-assisted synthesis [113], and freeze-drying method [114]. [132].…”