MnO₂ 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 MnO₂ composites is a useful way to enhance the performance of MnO₂. At first, a series of binary MnO₂/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 MnO₂/CNT/polyaniline (PANI) composites were prepared to investigate the effect of unitary, binary and ternary composites on the MnO₂. 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.

中文翻译：

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水性锌离子电池的二元和三元二氧化锰复合正极

MnO ₂是用于水性锌离子电池（ZIB）的传统阴极材料。但是，其广泛的使用受到其导电性和循环性能差的限制。二元或三元MnO ₂复合材料的设计是提高MnO ₂性能的有用方法。首先，通过一种简便的共沉淀法合成了一系列具有不同CNT含量的二元MnO ₂ /碳纳米管（CNT）复合材料。研究了碳纳米管含量对二元复合材料性能的影响。此外，制备了三元MnO ₂ / CNT /聚苯胺（PANI）复合材料，以研究一元，二元和三元复合材料对MnO _{2的影响。}。结果表明，适当的CNT含量降低了复合材料的电荷转移电阻，从而导致良好的电化学性能。加入PANI稳定了复合材料的循环性能，但比容量略有下降。