Constructing ultra-long life and super-rate rechargeable aqueous zinc-ion batteries by integrating Mn doped V6O13 nanoribbons with sulfur-nitrogen modified porous carbon

In this research, a hybrid structure composed of Mn doped V6O13 nanoribbons and N-S modified porous carbon structure (MnVO/(SN)-C) has been designed. Unidimensional porous nanoribbon structure can form Zn2+ diffusion channels and enable the abundant energy-storage sites, while the doping of Mn ion into V6O13 can optimize the electronic structure simultaneously. The rigid and conductive N-S modified carbon structure can not only protect the nanoribbons, but also boost the electron transport rate in the electrochemical reaction, and thus depress the huge volume expansion and ameliorate conductivity. Therefore, Zn2+ diffusion rate and electrochemical reaction kinetics are greatly promoted, resulting in excellent cycle stability and super-rate performance of this cathode material. At the current density of 0.5 A g−1, this electrode material can deliver favorable capacity of 414.2 mA h g−1, and can deliver 272.4 mA h g−1 at 10 A g−1 (67.37% retention from 1 to 10 A g−1). It also achieves long-term cycle stability (100.1% after 1000 cycles) at 10 A g−1. The rechargeable aqueous ZIBs with ultra-long life and ultra-high rate may be the most advantageous candidate for the next generation of energy storage facilities.