MnO2@PANI nanorod arrays for high-performance aqueous zinc-ion batteries

Eco-friendliness, economic benefits, and good security make aqueous zinc-ion batteries show wide application foreground for energy storage. Developing cathode materials that possess both high structural stability and excellent performance is considerably important. In this work, MnO2@PANI nanorod arrays were used as a binderless cathode material, achieving superb specific capacity (293.7 mAh g−1 at 0.1 A g−1). The ordered nanorod arrays also optimize of electrolyte ions transportation, which is benefit to improving rate performance of batteries. MnO2@PANI nanorod arrays show a capacitance retention of 51% (150.5 mAh g−1), while that of MnO2@PANI layer is 35% (59.9 mAh g−1) when current density increased by 10-fold.