Abstract
Highlights3D flower-like architecture assembled by NH4V4O10 nanobelts (3D-NVO) was fabricated.The Zn2+ ion was intercalated into NVO cathode within the interlayer region (NH4V4O10 ↔ ZnxNH4V4O10).The 3D-NVO cathode could deliver a large reversible capacity of 485 mAh g−1 at a current density of 100 mA g−1 for zinc-ion battery.
Highlights
Battery technologies are the key to delivering significant advances in a wide range of industries, from portable elec‐ tronics and electric vehicles to renewable power [1,2,3,4,5]
The exploration focus of zinc-ion batteries (ZIBs) cathode materials remains on manganese-based oxides, such as α-MnO2 [14, 15], β-MnO2 [16], γ-MnO2 [17], α-Mn2O3 [18], Mn3O4 [19], and ZnMn2O4 [20, 21], which can deliver initial charge/ discharge capacities up to 200–350 mAh g−1 under low rates
3D-NVO cathode materials were successfully synthesized by reacting ammonium metavanadate (NH4VO3) with oxalic acid (H2C2O4) in aqueous solution through a one-pot microwave-assisted hydrothermal method
Summary
Battery technologies are the key to delivering significant advances in a wide range of industries, from portable elec‐ tronics and electric vehicles to renewable power [1,2,3,4,5]. The exploration focus of ZIB cathode materials remains on manganese-based oxides, such as α-MnO2 [14, 15], β-MnO2 [16], γ-MnO2 [17], α-Mn2O3 [18], Mn3O4 [19], and ZnMn2O4 [20, 21], which can deliver initial charge/ discharge capacities up to 200–350 mAh g−1 under low rates. Their capacities decay drastically owing to the Mn dissolution via the disproportionation reaction upon repeated electrochemical cycling. Despite current achieve‐ ments, their reversible capacity is still far from being satisfac‐ tory (< 400 mAh g−1) owing to tardive Zn2+ diffusion
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