Facile Synthesis of V2O5 Hollow Spheres as Advanced Cathodes for High-Performance Lithium-Ion Batteries

Abstract

Three-dimensional V 2 O 5 hollow structures have been prepared through a simple synthesis strategy combining solvothermal treatment and a subsequent thermal annealing. The V 2 O 5 materials are composed of microspheres 2-3 µm in diameter and with a distinct hollow interior. The as-synthesized V 2 O 5 hollow microspheres, when evaluated as a cathode material for lithium-ion batteries, can deliver a specific capacity as high as 273 mAh·g −1 at 0.2 C. Benefiting from the hollow structures that afford fast electrolyte transport and volume accommodation, the V 2 O 5 cathode also exhibits a superior rate capability and excellent cycling stability. The good Li-ion storage performance demonstrates the great potential of this unique V 2 O 5 hollow material as a high-performance cathode for lithium-ion batteries.

Mechanisms of Water-Stimulated Mg2+ Intercalation in Vanadium Oxide: Toward the Development of Hydrated Vanadium Oxide Cathodes for Mg Batteries

“…The divalent nature of the Mg 2+ ion enables magnesium batteries to attain high volumetric capacities of up to 3,833 mAh/cm 3 (Novák et al, 1999). This is significantly higher than the volumetric capacity of the graphite (760 mAh/cm 3 ) anodes currently used in commercialized lithium-ion batteries (Muldoon et al, 2014;Zhang et al, 2019). Moreover, magnesium metal has a very low standard reduction potential of −2.37 V vs S.H.E., making it possible to achieve high energy densities.…”

Control of crystal size tailors the electrochemical performance of α-V2O5 as a Mg2+ intercalation host

“…25 Synthesized α-V 2 O 5 has typically formed micron-long nanorods, micron-wide nanosheets and hollow microspheres when prepared from solution without a physical scaffold. 33,[36][37][38] In contrast, α-V 2 O 5 prepared as part of a composite material has allowed for the formation of smaller, semi-spherical nanometric α-V 2 O 5 crystallites, where the composite material provided heterogeneous nucleation sites for V 2 O 5 crystallites and prevented their agglomeration and fusion. 34,[39][40][41][42][43] These templating agents have typically consisted of carbonaceous materials (such as graphene), 34,[39][40][41] and nanometric oxides, such as ZrO 2 and TiO 2 .…”

Synthesis of nanostructured hollow microspheres of vanadium (III, V) oxides

“…The morphological features of nanocrystaline samples are varied by the preparation conditions. There are several ways to synthesize vanadium oxides in the 3-D state: hydrothermal method [17], thermal decomposition of complexes with an organic ligand [21], and spray pyrolysis method [22][23][24][25]. The production of oxide materials in the form of hollow microspheres is a challenging task, since these objects combine the advantages of 3-D structures and thin films.…”