A Novel and Facile One-Pot Solvothermal Synthesis of PEDOT–PSS/Ni–Mn–Co–O Hybrid as an Advanced Supercapacitor Electrode Material

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• 作者：Chengjie Yin ; Chunming Yang ; Min Jiang ; Cuifen Deng ; Lishan Yang ; Junhua Li ; Dong Qian
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：February 3, 2016
• 年：2016
• 卷：8
• 期：4
• 页码：2741-2752
• 全文大小：965K
• ISSN：1944-8252

文摘

In this work, a novel and facile one-pot method has been developed for the synthesis of a hybrid consisting of Ni–Mn–Co ternary oxide and poly(3,4-ethylenedioxythiophene)–polystyrenesulfonate (PEDOT–PSS/NMCO) with a hierarchical three-dimensional net structure via a solvothermal–coprecipitation coupled with oxidative polymerization route. Apart from the achievement of polymerization, coprecipitation, and solvothermal in one pot, the hydroxyl (OH^–) ions generated from the oxidative polymerization of organic monomer by neutral KMnO₄ solution were skillfully employed as precipitants for metal ions. As compared with the PEDOT–PSS/Ni–Mn binary oxide, PEDOT–PSS/Co–Mn binary oxide, and PEDOT–PSS/MnO₂, PEDOT–PSS1.5/NMCO exhibits overwhelmingly superior supercapacitive performance, more specifically, a high specific capacitance of 1234.5 F g^–1 at a current density of 1 A g^–1, a good capacitance retention of 83.7% at a high current density of 5 A g^–1 after 1000 cycles, an energy density of 51.9 W h kg^–1 at a power density of 275 W kg^–1, and an energy density of 21.4 W h kg^–1 at an extremely elevated power density of 5500 W kg^–1. Noticeably, the energy density and power density of PEDOT–PSS/NMCO are by far higher than those of the existing analogues recently reported. The exceptional performance of PEDOT–PSS/NMCO benefits from its unique mesoporous architecture, which could provide a larger reaction surface area, faster ion and electron transfer ability, and good structural stability. The desirable integrated performance enables the multicomponent composite to be a promising electrode material for energy storage applications.