Preparation and electrochemical performance of VO₂(A) hollow spheres as a cathode for aqueous zinc ion batteries

Abstract

VO2(A) hollow spheres exhibit superior zinc ion storage performance, large reversible capacity of 357 mA h g−1 at 0.1 A g−1, and good cycling stability with a capacity retention of 76% over 500 cycles at 5 A g−1

One-Pot Synthesis and Characterization of VO2(B) with a Large Voltage Window Electrochemical Performance in Aqueous Solution

“…After the discovery of VO 2 , it aroused great interest among scientists for its structural phase transition [14,15], and the crystallography data of VO 2 polymorphs were studied systemically (in Table 1) [16][17][18][19][20][21]. In the past decades, B-type vanadium dioxide (defined as VO 2 (B)) has attracted widespread attention to the application of lithium-ion batteries due to its chemical structural characteristics [22,23].…”

Electrodeposited Layered Sodium Vanadyl Phosphate (NaxVOPO4·nH2O) as Cathode Material for Aqueous Rechargeable Zinc Metal Batteries

“…The sloppy profile of the charge/discharge curves suggests the occurrence of Faradaic reactions during the insertion/extraction of the Zn 2+ ions, which is consistent with the CV data. The average voltage of the cell calculated from the discharge profile at 0.033 A g –1 is ≈1.18 V (Figure S15), a value higher than that reported for the other vanadium-based cathode materials such as V 2 O 5 and VS 2 . ,− The higher average voltage shows the advantage of the NVP cathode for realizing high energy density of ARZMBs. The rate performance plot of the Zn∥fTCF/VP-200 cell is presented in Figure c.…”

“…For instance, the MnO 2 cathode shows a relatively good average operating voltage of around 1.20 to 1.40 V , but suffers from low cycling stability due to the gradual dissolution of the Mn 2+ ions into the aqueous electrolyte during cycling. , Similarly, despite the availability of various types of vanadium oxides (e.g., VO 2 , V 2 O 5 , V 6 O 13 , etc.) as high-capacity cathode materials for ARZMBs, − their average operating voltage is as low as 0.80 V, resulting in low energy density. To improve the average operating voltage and energy density of the vanadium-based cathodes in ARZMBs, a transition from vanadium oxides to polyanionic vanadium compounds is receiving immense attention among electrochemists.…”

Synergistic effect of multi-electron conversion and anion redox media chemistry for high-performance rechargeable aqueous Zn ion batteries

“…2e, our Zn-BiOI battery based on the conversion reaction shows preferential volumetric capacity and gravimetric capacity (the capacity was calculated based on the mass of BiOI),higher than those of intercalation-type and other conversion-type battery systems, even exceeding those of generally reported Zn-MnO 2 and Zn-V 2 O 5 systems. 20,[28][29][30][31][32][33][34][35][36][37][38] In addition, the energy density of the Zn-BiOI battery is also impressive, with a value of 382 W h kg À1 recorded at a power density of 169 W kg À1 . The long-term cycling stability of the electrode was investigated at a current density of 3 A g À1 .…”