Nitrogen-doped carbon encapsulated zinc vanadate polyhedron engineered from a metal–organic framework as a stable anode for alkali ion batteries

Engineering Interlayer Space of Vanadium Oxide by Pyridinesulfonic Acid-Assisted Intercalation of Polypyrrole Enables Enhanced Aqueous Zinc-Ion Storage

“…In the application of pure-phase V 2 O 5 , the structural instability and slow kinetics result in the low storage capacity of zinc ions. , For purpose of solving this problem, people began to regulate the structure to improve the reaction kinetics and stabilize the structure, such as guest insertion between V–O layers, surface coating, − defect engineering, etc. Just recently, many studies take metal ions as guest materials (Li + , Ca 2+ , , Zn 2+ , Mg 2+ , Mn 2+ , and Al 3+ ), and metal ions and crystal water are inserted together between V 2 O 5 layers (denoted as MVOH).…”

Synergetic V2O5·3H2O/Metallic VS2 Nanocomposites Endow a Long Life and High Rate Capability to Aqueous Zinc-Ion Batteries

“…The capacitive contribution is obtained according to the equations i ( V ) = a ν b and i ( V ) = k 1 ν + k 2 ν 1/2 , where i and ν represent the current and scan rate, respectively, while b can be calculated from the slope of log­( i ) versus log­(ν) plots from four peaks. K 1 ν is the current of a pseudo-capacitive behavior and k 2 ν 1/2 is the current from the diffusion process . As depicted in Figure c, the b values of four peaks are b O 1 = 0.51, b O 2 = 0.56, b R 1 = 0.68, and b R 2 = 0.63, manifesting that the Zn 2+ storage kinetics of SVO is controlled by both ionic diffusion and capacitive behaviors.…”

Lithium‐ion battery anode with high capacity retention derived from zinc vanadate and holey graphene

“…12,31 The vanadates can coordinate as cubic, orthorhombic, tetrahedral and square pyramidal to octahedral geometry along with multiple oxidation states that can support multielectron redox processes ensuring high capacity so their adjustable framework structure and oxidations of the vanadates make them a potential candidate for the LIBs. 32 29 and other fractionally coordinated structures. 35 In the current approach, the utilization of holey graphene oxide (hGO) exclusively enhances the symbiotic effect of mixed-metal zinc and vanadium oxide, which ensures high reversible capacity and well-suited ionic conductivity of the Zn 3 V 2 O 8 /hGO-based LIB anodes explored in this study.…”

“…22,23 The very known limiting factors include low electronic and ionic conductivity, besides the undesired volume expansion that bothers more capacity degradation, particularly at increased current densities. 15,24 Vanadates in many forms like hydrated vanadates, 25 amorphous, 26,27 sheathed, 28 and encapsulated/ composited 29,30 have been well known in batteries with a multitude of tunnelled, open frame-work and layered type structural adaptabilities. 12,31 The vanadates can coordinate as cubic, orthorhombic, tetrahedral and square pyramidal to octahedral geometry along with multiple oxidation states that can support multielectron redox processes ensuring high capacity so their adjustable framework structure and oxidations of the vanadates make them a potential candidate for the LIBs.…”

“…The vanadates can coordinate as cubic, orthorhombic, tetrahedral and square pyramidal to octahedral geometry along with multiple oxidation states that can support multielectron redox processes ensuring high capacity so their adjustable framework structure and oxidations of the vanadates make them a potential candidate for the LIBs 32 . As far zinc substituted vanadates have got special interest because zinc substitution in the vanadate affords different coordinations like Zn 2 V 2 O 7, 15 Zn 3 V 2 O 7, 33 Zn 3 V 2 O 8, 34 Zn 2 VO 4 29 and other fractionally coordinated structures 35 …”