Oxygenated copper vanadium selenide composite nanostructures as a cathode material for zinc-ion batteries with high stability up to 10 000 cycles

Abstract

The oxygenated copper vanadium selenide composite electrode material as a cathode for aqueous zinc-ion batteries exhibits high capacity with ultra-long cycling life.

Rational Design of Ni-Doped V2O5@3D Ni Core/Shell Composites for High-Voltage and High-Rate Aqueous Zinc-Ion Batteries

“…The wider voltage window enables the ZIB to work at a high energy density ( Figure 4 a and Figure S6 ). In addition, we also note that this working potential window is larger than that of other recently reported V 2 O 5 -based cathodes (e.g., Zn 0.25 V 2 O 5 , Ca 0.25 V 2 O 5 and Na 0.33 V 2 O 5 ) [ 36 , 41 , 42 , 43 , 44 , 45 ].…”

High-Capacity Calcium Vanadate Composite with Long-Term Cyclability as a Cathode Material for Aqueous Zinc-Ion Batteries

“…The batteries containing monovalent cations such as Li + , Na + , and K + and multivalent cations such as Mg 2+ , Ca 2+ , Zn 2+ , and Al 3+ with an aqueous electrolyte are choices for the LiBs because of their low cost, safe operation with electrolyte, good ionic conductivity, and fast charge/discharge rates. Among them, aqueous zinc (Zn)-ion batteries (AZiBs) are the most promising alternative to LiBs owing to their low cost, high abundance of Zn metal, intrinsic safety, and environmental friendliness. – Moreover, Zn metal as an anode can exhibit high gravimetric and volumetric capacities (820 mA h g –1 and 5855 mA h cm –3 , respectively), low redox potential (−0.76 V vs standard hydrogen electrode), and excellent stability with an aqueous electrolyte highly abundant in the earth’s crust (about 300 times higher than Li). – Recently, metal sulfide, metal selenide, and metal phosphate-based cathodes showed improved Zn-ion storage performance owing to their good conductivity, layered structure, modified crystal structure, etc. – Unfortunately, the development of AZiBs is far from practical implementation because of the availability of an unsuitable cathode material. Early studies mainly focused on the development of manganese (Mn)-based oxides and Prussian blue analogues as cathodes for AZiBs .…”

“…Recently, vanadium (V)-based cathode materials have attracted considerable attention as an anode for LiBs and as a cathode for AZiBs due to their unique advantages, including their layered structure with rich mixed oxidation states and low cost. ,– Among the V-based cathodes, vanadium pentoxide (V 2 O 5 ) within a layered structure served as an excellent cathode owing to its multiple oxidation states and low cost. – However, poor electrical conductivity and unstable crystal structure during the cycles lead to poor electrochemical performances . To tackle this issue, a variety of proposals were made, including introducing nanomaterials, modification of structure, and cation pillaring. , In particular, the insertion of metal ions into layered structure V 2 O 5 is an effective strategy to alter the structural stability. ,, The inserted metal ions could act as pillars, which can modify the structural stability of the host material and result in fast ion-transfer kinetics, thereby enhancing the electrochemical performance. , Divalent metal ions (Zn 2+ , Ca 2+ , Mg 2+ , etc.) are more beneficial than monovalent alkali metal cations (Li + , Na + , K + , etc.)…”

High‐Capacity and Long‐Life Manganese Vanadium Oxide Composite as a Cathode for Aqueous Zinc‐Ion Batteries

“…So far, manganese (Mn)-based materials, vanadium (V)-based materials, and Prussian blue analogues are the most studied cathodes for AZIBs. [18][19][20][21][22][23][24][25] Prussian blue analogues have attracted much interest owing to their excellent properties, including support for high voltage, low cost, and non-toxicity. Unfortunately, their specific capacity is poor, which hinders their practical applications.…”