Key Words:HIGH-PERFORMANCE ANODE; ZINC; MICROSPHERES; NANOSHEETS; NANOSTRUCTURES; NANOWIRES; CATHODE; DESIGN; ZN-3(OH)(2)V2O7-CENTER-DOT-2H(2)O; ZN3V2O7(OH)(2)CENTER-DOT-2H(2)O

Abstract:A simple coprecipitation route followed by a calcination process was developed to prepare 2D hierarchical Zn-3(VO4)(2) porous networks formed by the crosslinkage of monolayered nanoparticles. As a promising anode for lithium ion batteries, the electrochemical performance of Zn-3(VO4)(2) was investigated. At a current density of 1.0 A g(-1), the Zn-3(VO4)(2) porous networks could register a high reversible discharge capacity of 773 mA h g(-1) and the capacity retention was 94% after 700 cycles. Moreover, a remarkable reversible discharge capacity of 445 mA h g(-1) was achieved at a current density of 5 A g(-1) after 1200 cycles. Even at a higher current density of 10.0 A g(-1), a high reversible capacity of 527 mA h g(-1) could be delivered, which still remained at 163 mA h g(-1) after 1200 cycles. This superior performance is attributed to the unique 2D porous networks with a stable structure. This work shows a new avenue for facile, cheap, green, and mass production of zinc vanadate oxides with 2D porous hierarchical networks for next-generation energy conversion and storage devices.

Volume:49

Issue:7

Translation or Not:no