Flexible high energy density zinc-ion batteries enabled by binder-free MnO2/reduced graphene oxide electrode

We demonstrate a rechargeable zinc-ion battery with high energy density and cyclability using MnO 2 and reduced graphene oxide (MnO 2 /rGO) electrode. The flexible and binder free electrode, with high MnO 2 mass ratio (80 wt% of MnO 2 ), is fabricated using vacuum filtration without any additional additives other than rGO. Compared to batteries with conventional MnO 2 electrodes, the Zn–MnO 2 /rGO battery shows a significant enhanced capacity...