Hierarchical double-shelled poly(3,4-ethylenedioxythiophene) and MnO2 decorated Ni nanotube arrays for durable and enhanced energy storage in supercapacitors
Hierarchical double-shelled poly(3,4-ethylenedioxythiophene) and MnO2 decorated Ni nanotube arrays for durable and enhanced energy storage in supercapacitors
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分层双壳聚（3,4-乙撑二氧噻吩）和MnO2装饰的镍纳米管阵列可在超级电容器中实现持久和增强的能量存储
DOI：
10.1016/j.electacta.2018.01.069
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发表时间：
2018-02-20
影响因子：
6.6
通讯作者：
Tong, Yexiang
中科院分区：
文献类型：
--
作者：
Li, Xian-Xia;Deng, Xiao-Hua;Tong, Yexiang
作为一种极具吸引力的超级电容器材料，MnO2的导电性差，稳定性差。本工作采用简单的电沉积方法，成功地制备了双壳聚(3，4-乙二氧基噻吩基)(PEDOT)和MnO2修饰的镍纳米管阵列(NTA)，显著提高了杂化材料的导电性，延长了其耐用度。作为一种自支撑电极，所制备的PEDOT@MnO2@NiNTAs具有优异的电化学性能，包括高的质量比容量(基于MnO2质量，2.5Ag(-1)时的442.85 Fg(-1))和优异的循环稳定性(15000次循环后的容量保持率为80.37%)。此外，当将PEDOT@MnO2@NiNTAs和活性碳(AC)组装成不对称超级电容器时，该器件提供高达1.7V的电压窗口，并提供大的体积电容(1.47F cm(-3)，在4 mA cm(-3)时)和高能量密度(0.59 MWh cm(-3)，功率密度为84.96 mW cm(-3))，表明其在超级电容器实际应用中的巨大潜力。(C)2018爱思唯尔有限公司。保留所有权利。
As an attractive supercapacitor material, MnO2 greatly suffers poor conductivity and unsatisfied stability. In this work, double-shelled poly(3,4-ethylenedioxythiophene) (PEDOT) and MnO2 decorated Ni nanotube arrays (NTAs) are successfully synthesized by a simple electrodeposition strategy, endowing the hybrid with remarkably improved conductivity and prolonged durability. As a self-supported electrode, the resulting PEDOT@MnO2@NiNTAs exhibits outstanding electrochemical properties, including high mass capacitance (based on MnO2 mass, 442.85 F g(-1) at 2.5 A g(-1)) and excellent cycling stability (80.37% capacitance retention after 15000 cycles). Furthermore, when assembling an asymmetric supercapacitor with the PEDOT@MnO2@NiNTAs and activated carbon (AC), the device affords a voltage window up to 1.7 V and delivers a large volumetric capacitance (1.47 F cm(-3) at 4 mA cm(-3)) and high energy density (0.59 mWh cm(-3) at power density of 84.96 mW cm(-3)), indicating its great potential in practical supercapacitor applications. (c) 2018 Elsevier Ltd. All rights reserved.