Achieving Ultrahigh Energy Density and Long Durability in a Flexible Rechargeable Quasi‐Solid‐State Zn–MnO 2 Battery

Advanced flexible batteries with high energy density and long cycle life are an important research target. Herein, the first paradigm of a high‐performance and stable flexible rechargeable quasi‐solid‐state Zn–MnO 2 battery is constructed by engineering MnO 2 electrodes and gel electrolyte. Benefiting from a poly(3,4‐ethylenedioxythiophene) (PEDOT) buffer layer and a Mn 2+ ‐based neutral electrolyte, the fabricated Zn–MnO 2 @PEDOT battery presents a remarkable capacity of 366.6 mA h g −1 and good cycling performance (83.7% after 300 cycles) in aqueous electrolyte. More importantly, when using PVA/ZnCl 2 /MnSO 4 gel as electrolyte, the as‐fabricated quasi‐solid‐state Zn–MnO 2 @PEDOT battery remains highly…

• NN
  National Natural Science Foundation of China

  Awards: 21403306, 31530009, 2016YFA0202604