Ammonium Vanadate Electrode Materials with Stable Layered Structures for Rechargeable Zinc Ion Battery

Abstract

As electricity demand grows, it is important to develop some energy storage systems with long cycle life and high specific capacity. As emerging energy storage devices, aqueous Zn ion batteries (AZIBs) are featured with low cost, environmentally friendliness and high safety. In this work, we report a kind of unique double-layer structured NH4V4O10 (NHVO) nanobelts as cathode materials. The assembled Zn/NHVO-1 batteries with 3 M Zn(CF3SO3)2 electrolytes present an initial specific capacity of 423.79 mAh g-1 at a current density of 0.1 A g-1. And they achieve the capacity retention of 87% after 2000 cycles at 2 A g-1. In addition, they also can provide an energy density of 370.08 Wh kg-1 at a power density of 120 W kg-1 at 0.1 A g-1.

Keywords: Zinc ion battery, NH4V4O10, Cathode electrode, Energy storage device.