ZHANG Yuyin, SHAO Yi
(School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, Liaoning, China)
Abstract: Rechargeable zinc ion batteries have attracted much attention for their characteristics of environmental friendless, low cost and high safety. Recently, the most widely studied cathodes for zinc ion batteries are manganese-based materials. However, their poor cycling stability and low electrical conductivity limit their further development. Copper doped α-MnO2nanowires are prepared as the cathode materials. With the introduction of copper, the conductivity of the sample is improved, thus leading to an increase in capacity. The assembled Zn/Cu-MnO2 batteries deliver a reversible capacity of 445 mAh·g−1 at a current density of 0.1 A·g−1. They keep excellent cycling stability after 1000 cycles at a current density of 1 A·g−1, demonstrating their potential applications in future energy storage devices.
Key words: Zn ion battery; MnO2; cathode; high-rate performance