Vanadium Oxides with Amorphous‐Crystalline Heterointerface Network for Aqueous Zinc‐Ion Batteries

Abstract

Rechargeable aqueous Zn-VO x batteries are attracting attention in large scale energy storage applications. Yet, the sluggish Zn 2 + diffusion kinetics and ambiguous structure-property relationship are always challenging to fulfil the great potential of the batteries.Here we electrodeposit vanadium oxide nanobelts (VO-E) with highly disordered structure. The electrode achieves high capacities (e.g., � 5 mAh cm À 2 , 516 mAh g À 1 ), good rate and cycling performances. Detailed structure analysis indicates VO-E is composed of integrated amorphous-crystalline nanoscale domains, forming an efficient heterointerface network in the bulk electrode, which accounts for the good electrochemical properties. Theoretical calculations indicate that the amorphous-crystalline heterostructure exhibits the favorable cation adsorption and lower ion diffusion energy barriers compared to the amorphous and crystalline counterparts, thus accelerating charge carrier mobility and electrochemical activity of the electrode.

Phase Engineering of Nanostructural Metallic Materials: Classification, Structures, and Applications

“…The metastable state of the metallic glass offers a means to tune the energy state and structure through dynamic hops between the basins. , The intrinsic differences in the structure and potential energy state contribute to absolutely distinct physicochemical characteristics and thus the formation of an amorphous solid compared with a crystalline solid. Alloys composed of supra-nanometer-sized amorphous and crystalline phases have been reported as a new generation of high-performance catalysts and high-strength as well as high-ductility structural materials. ,,− These alloy formations strongly depend on the control of composition- and thermal-related factors, which dominate the nucleation and growth of the crystalline phase from the amorphous matrix (Figure ). The fabrication technologies of SNDP-GC materials can be divided into two categories according to the formation process: technology involving the condensation of a gas/liquid to a solid and a technology involving a solid-phase transformation from noncrystal to crystal.…”

Constructing ultra-stable and high-performance zinc-ion batteries through Mn doped vanadium oxide nanobelt cathode

“…However, it is still very difficult to find cathode materials with high capacity and acceptable cycling performance because of the strong polarization of bivalent Zn 2+ . 9–12 Prussian blue 13–15 and manganese oxides 16–18 deliver low specific capacities and weak cycling abilities. This investigation of vanadium-based compounds as cathode materials for ZIBs is motivated by the high natural availability, low cost, and numerous oxidation states of vanadium.…”

Sodium ion pre-intercalation regulates the electron density and structural stability of vanadium oxide nanowires for Ca–ion batteries

“…6,7 In a single redox reaction, multivalent ions demonstrate the capacity to furnish a larger quantity of electrons compared to monovalent ions such as Li + , Na + , and K + , which results in a superior volumetric energy density. 8,9 Recently, zinc-ion batteries (ZIBs), [10][11][12] magnesium-ion batteries (MIBs), [13][14][15] calcium-ion batteries (CIBs), [16][17][18][19] and aluminum-ion batteries (AIBs) [20][21][22] have garnered extensive attention from scientists and achieved significant advancements. Among these various candidates, CIBs are the most favored by researchers as the standard reduction potential of calcium (−2.87 V vs. the standard hydrogen electrode (SHE)) is in proximity to the reduction potential of lithium (−3.04 V vs. SHE), which is in contrast to zinc (−0.76 V vs. SHE), aluminum (−1.66 V vs. SHE), and magnesium (−2.37 V vs. SHE).…”