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

Abstract

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.

Review on recent progress in Manganese‐based anode materials for sodium‐ion batteries

“…In comparison with their corresponding single oxides, Mn-based spinel oxides such as MnCo 2 O 4 and MnFe 2 O 4 would be more attractive to be explored because of the synergistic effect on redox reaction contributed by the cobalt/iron and manganese ions. 57,58 In addition, these binary metal oxides have been widely investigated as an anode for Li-ion batteries [59][60][61][62] because of their better electrical conductivity and superior electrochemical activity, in comparison with mono-metals, as well as high theoretical capacity. Nonetheless, these materials are rarely reported for anode materials in Na-ion batteries.…”

Application of Ionic Liquids for Batteries and Supercapacitors

“…In the search for advanced sustainable energy sources, the urgent development of long-term high-efficient high energy-power resources is required. Electrochemical energy storage (EES) systems such as batteries and supercapacitors are promising for reaching the required demands due to their fast charge–discharge rates, high power ability, long cycle life for supercapacitors and high-rate capability and high energy density for batteries [ 5 , 6 ]. Among different types of rechargeable batteries, lithium-ion (Li-ion) batteries have been considered as one of the most promising EES sources on the market since 1991.…”

NiMoO4@NiMnCo2O4 Heterostructure: A Poly(3,4-propylenedioxythiophene) Composite-Based Supercapacitor Powers an Electrochromic Device

“…This can be accomplished by the use of a conducting polymer coating. The usual approach involves the application of composites of conducting polymers, such as poly­(aniline) (PANI), poly­(pyrrole) (PPy), poly­(3,4-ethylenedioxythiophene) (PEDOT), etc., with transition metal oxides as electroactive electrodes in supercapacitors to achieve performance enhancement in terms of storage and cycle life owing to the increased electrical conductivity, the additional redox activity offered by the polymer, and its chemical robustness. − This is evident from the increased storage response obtained in a previous study with a composite of PEDOT:PSS (poly-(4-styrene sulfonate)), with the ternary oxide of Ni–Mn–Co attributed to the larger reaction surface area, faster ion and electron transfer ability, and good structural stability . Yet another report showed that by doping Mn ions into a Ni–Co-layered double hydroxide nanosheet-coated PANI-derived carbon structure, the energy storage performance is considerably improved for the corresponding asymmetric supercapacitor .…”