Binary and Ternary Manganese Dioxide Composites Cathode for Aqueous Zinc‐ion Battery

Abstract MnO 2 is a traditional cathode material for aqueous zinc‐ion battery (ZIB). However, its extensive use is limited by its poor conductivity and cycling performance. Design of binary or ternary MnO 2 composites is a useful way to enhance the performance of MnO 2 . At first, a series of binary MnO 2 /carbon nanotube (CNT) composites with different CNT contents were synthesized by a facile co‐precipitation method. The effect of CNT content on the properties of binary composites was investigated. In addition, the ternary MnO 2 /CNT/polyaniline (PANI) composites were prepared to investigate the effect of unitary, binary and ternary composites on the MnO 2 . The results show that an appropriate content of CNT decreases the charge transfer resistance of the composite leading to a good electrochemical performance. The addition of PANI stabilizes the cycle performance of the composite at a cost of a slight decrease in the specific capacity.