Investigation of manganese oxide octahedral molecular sieve (KxMn8-xO16) nanodendrite cathode for aqueous zinc ion batteries

The manganese-based cathode of zinc ion batteries (ZIBs) has been focused owing to their high energy density and voltage. However, the electrostatic repulsion and large ionic hydrated radius of Zn2+ leads to volume expansion and capacity attenuation of manganese-based electrode. In this work, we report a ZIBs cathode of OMS-2 nanodendrite to utilize K+ intercalation and structural properties to solve these problems. The Zn/OMS-2 nanodendrite battery maintains an average charge and discharge voltages of 1.6 V and 1.3 V, a high energy density of 109 W h kg(-1), and a capacity retention ratio of 74% at 100 mA g(-1) after 300 cycles. Moreover, the OMS-2 nanodendrite electrode has an excellent dynamic performance. These properties have potential competitiveness in the energy storage field.