Hard-template-engaged formation of Co₂V₂O₇ hollow prisms for lithium ion batteries

Abstract

A novel hard-template-assisted method is developed to fabricate high quality Co2V2O7 hollow nanoprisms. When evaluated as anode materials for lithium ion batteries, they exhibited a remarkable enhanced performance compared with the solid ones.

One-step preparation of Co2V2O7: synthesis and application as a Fenton-like catalyst in a gas diffusion electrode

“…Several techniques have been used for the synthesis of Co 2 V 2 O 7 ; some of these techniques are solid-state reaction, 32 sol-gel, 33 solution precipitation, 34 and hydrothermal synthesis. 35 In the present study, CoV 2 O 7 was synthesized by the direct mixing of stoichiometrically dissolved amounts of Co( ii ) – acid solution, and V(V) – alkaline solution, dropwise.…”

Physical Properties and Structural Stability of Cobalt Pyrovanadate Co2V2O7 under High-Pressure Conditions

“…However, many challenges in this field still exist, and new materials are constantly being tested to improve durability and the performance of these batteries. Metal vanadates such as ZnV 2 O 6 , Zn 2 V 2 O 7 , CoV 2 O 6 , and especially Co 2 V 2 O 7 have already shown promising results as anodes for lithium batteries. − Additionally, the relatively low electronic band gaps of these compounds make them apt for green technologies, such as the photodegradation of organic pollutants and for water splitting. − With regard to basic research, among the aforementioned materials, Co 2 V 2 O 7 , also known as cobalt pyrovanadate, has received a fair amount of attention because of its peculiar magnetic features. − However, studies regarding its fundamental structural and physical properties are scarce and mainly focused on its electrical conductivity, thermal behavior, and stability, especially regarding the use of cobalt pyrovanadate as the anode material in solid oxide fuel cells. , In particular, no studies in other than ambient pressure have been performed until now, which are important, for instance, to assess the structural stability of Co 2 V 2 O 7 in view of its use in rechargeable batteries for electric cars.…”

Superior wide-temperature lithium storage in a porous cobalt vanadate

“…Recently, transition metal vanadates (TMVs) are attracting extensive attention as anodes for LIBs [22][23][24][25][26][27]. In particular, Co2V2O7, one typical vanadate with mixed-valence cations in one single crystal structure, are regarded as a promising anode material [28][29][30]. Its intriguing electrochemical reactivity mainly comes from the complex chemical composition, interfacial effects and synergistic benefits endowed by different metal species [31][32][33][34].…”