Improved Reversible Zinc Storage Achieved in a Constitutionally Crystalline-Stable Mn(VO3)2 Nanobelts Cathode

Rechargeable zinc-ion batteries (ZIBs) are potential for grid-scale applications owing to their safety, low price, and available sources. The development of ZIBs cathode with high specific capacity, wide operating voltage window and stable cyclability is urgently needed in next-generation commercial batteries. Herein, we report a structurally crystalline-stable Mn(VO 3 ) 2 nanobelts cathode for ZIBs prepared via a facile hydrothermal method. The as-synthesized Mn(VO 3 ) 2 exhibited high specific capacity of 350 mAh g −1 at 0.1 A g −1 , and maintained a capacity retention of 92 % after 10,000 cycles at 2 A g −1 . It also showed good rate performance and obtained a reversible capacity of up to 200 mAh g −1 after 600 cycles at 0.2 A g −1 under −20 °C. The electrochemical tests suggest that Mn(VO 3 ) 2 nanobelts impart fast Zn 2+ ions migration, and the introduction of manganese atoms help make the structures more indestructible, leading to a good rate performance and prolonged cycle lifespan. Graphical The crystalline-stable Mn(VO 3 ) 2 nanobelts cathode presents the specific capacity of 350 mAh g −1 at 0.1 A g −1 and maintain a capacity retention rate of 92 % for 10,000 cycles at a current density of 2 A g −1 . It also rendered good rate performance and obtained a reversible capacity of up to 200 mAh g −1 after 600 cycles at 0.2 A g −1 even under −20 °C. Benefiting from the unique tunnel type nanobelts structure, the Mn(VO 3 ) 2 nanobelts show high Zn 2+ migration kinetics and stable framework for reversible ions de-/insertion.