β-MnO2 nanolayer coated on carbon cloth as a high-activity aqueous zinc-ion battery cathode with high-capacity and long-cycle-life

A beta-MnO2 nanolayer coated on carbon cloth (MnO2@CC) was prepared for aqueous Zn-MnO2 battery. The MnO2@CC cathode demonstrates good electrochemical performance, including high specific capacity (326 mA h g(-1) at 100 mA g(-1)) and excellent long term cycling performance (90-100 mA h g(-1) at 2000 mA g(-1) for 700 cycles). The excellent performance is attributed to its unique structure: the outer surface of beta-MnO2 nanolayer is fully in contact with the electrolyte and the inner surface is closely combined with the conductive carbon cloth. (C) 2019 Elsevier B.V. All rights reserved.