Pseudocapacitance PPy coating modulation on the nano-MnO2 surface to improve zinc storage ability in neutral fiber battery

With the rapid development of wearable electronic technology, the research of fiber energy storage batteries, such as fiber Zn-MnO2 batteries, has also been promoted. However, mechanically mixing conductive carbon and MnO2 to improve charge transfer efficiency is still considered inefficient. In this work, PPy was used to coat the surface of nano MnO2. By regulating the structure of C-MnO2, an excellent charge transfer efficiency C-L27-MnO2 material with a suitable thickness and uniform PPy film was obtained. When the C-L27-MnO2 material was applied to a neutral fiber zinc-ion battery, it showed a significantly improved cycle and rate capacity. At a current density of 10 mA g−1, the specific capacity of the MnO2 electrode increased from 124.2 mAh/g to 316.0 mAh/g.