Co‐Intercalation of Dual Charge Carriers in Metal‐Ion‐Confining Layered Vanadium Oxide Nanobelts for Aqueous Zinc‐Ion Batteries

Abstract

Vanadium-based oxides with high theoretical specific capacities and open crystal structures are promising cathodes for aqueous zinc-ion batteries (AZIBs). In this work, the confined synthesis can insert metal ions into the interlayer spacing of layered vanadium oxide nanobelts without changing the original morphology. Furthermore, we obtain a series of nanomaterials based on metal-confined nanobelts, and describe the effect of interlayer spacing on the electrochemical performance. The electrochemical properties of the obtained Al 2.65 V 6 O 13 • 2.07H 2 O as cathodes for AZIBs are remarkably improved with a high initial capacity of 571.7 mAh • g À 1 at 1.0 A g À 1 . Even at a high current density of 5.0 A g À 1 , the initial capacity can still reach 205.7 mAh g À 1 , with a high capacity retention of 89.2 % after 2000 cycles. This study demonstrates that nanobelts confined with metal ions can significantly improve energy storage applications, revealing new avenues for enhancing the electrochemical performance of AZIBs.

Transition metal chalcogenides for next-generation energy storage

“…9,10 One of the most effective pathways to realize revolutionary electrochemical energy storage, beyond the scope of existing technologies and to further enhance the electrochemical performance of existing devices is through new electrode materials. 11,12,13,14 Chalcogenides constitute a promising class of novel electrode materials for both batteries and supercapacitors (Figure 1). 15,16,17,18 Chalcogenides are compounds which contain one or more chalcogen anions such as oxygen, sulfur, selenium, and tellurium.…”

How About Vanadium‐Based Compounds as Cathode Materials for Aqueous Zinc Ion Batteries?

“…were constructed to store Zn 2+ . [ 60 , 61 , 62 , 63 , 64 , 65 ] Vanadium‐based compounds have higher reversible capacities, better reactivity, and longer cycle lives than MnO 2 and Prussian blue and its analogs. [ 66 , 67 , 68 , 69 ] In addition, they also have diverse crystal structures, including layered, tunnel, NASICON structure, and so on, which can not only achieve multi‐electron transfer, but also help to achieve local electric neutrality and alleviate the polarization problem caused by Zn 2+ intercalation.…”

Copper molybdenum sulfide (Cu2MoS4) nanoplates as a proficient electrocatalytic interface for enhancing the electrochemical redox signals of ofloxacin for detection in pharmaceutical samples

“…16,17 In electrochemical sensing, the modification of electrodes has become increasingly important for improving the electrochemical performance. 14,16,18,19 Two-dimensional (2D) materials, such as layered transition metal chalcogenides (TMCs) 20,21 metal-organic frameworks [22][23][24][25] and metal oxides 26 with unique physical and chemical properties, can yield many interesting electrochemical properties. Recent studies have highlighted that TMCs having the chemical formula Cu 2 MX 4 (M = W or Mo; X = S or Se) possess interesting electrochemical properties due to their high electrical conductivity, the rich redox chemistry of both the transition metal and chalcogenide ligands, and their large surface area, which can greatly accelerate the charge transfer and electrochemical reaction kinetics.…”