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Rational design of polyaniline/MnO2/carbon cloth ternary hybrids as electrodes for supercapacitors

机译:聚苯胺/ MnO2 /碳布三元杂化物作为超级电容器电极的合理设计

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摘要

Two types of ternary composites were fabricated by reversing the deposition sequence of polyaniline (PANI) and MnO2 layers on plasma treated carbon cloth (m-CC), i.e., PANI@MnO2@m-CC and MnO2@PANI@m-CC. By comparison, PANI@MnO2@m-CC displayed a unique porous structure and possessed a better electrochemical performance than that of MnO2@PANI@m-CC. The morphological transformation of MnO2 petals into nanoparticles while anchoring PANI nanorods increases the interactions between the two pseudoactive materials. An asymmetric supercapacitor was fabricated by using PANI@MnO2@m-CC as the positive electrode and activated microwave exfoliated graphite oxide ('a-MEGO')@m-CC as the negative electrode. The asymmetric supercapacitor showed a maximum energy density of 33.9 W h kg(-1) (at a power density of 319.0 W kg(-1)) and power density of 17.2 kW kg(-1) (at an energy density of 14.3 W h kg(-1)) at an operating voltage of 2.0 V, suggesting PANI@MnO2@m-CC is a promising electrode candidate for supercapacitors.
机译:通过反转聚苯胺(PANI)和MnO2在等离子处理的碳布(m-CC)上的沉积顺序来制备两种三元复合材料,即PANI @ MnO2 @ m-CC和MnO2 @ PANI @ m-CC。相比之下,PANI @ MnO2 @ m-CC表现出独特的多孔结构,比MnO2 @ PANI @ m-CC具有更好的电化学性能。 MnO2花瓣形貌转变为纳米颗粒,同时锚定PANI纳米棒增加了两种假活性材料之间的相互作用。通过使用PANI @ MnO2 @ m-CC作为正极并使用活化的微波剥落氧化石墨('a-MEGO')@ m-CC作为负极来制造不对称超级电容器。非对称超级电容器的最大能量密度为33.9 W h kg(-1)(功率密度为319.0 W kg(-1))和功率密度为17.2 kW kg(-1)(能量密度为14.3 W) h kg(-1))在2.0 V的工作电压下,表明PANI @ MnO2 @ m-CC是超级电容器的有希望的电极候选材料。

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