Enhanced Pseudocapacitive Performance of Symmetric Polypyrrole-MnO2 Electrode and Polymer Gel Electrolyte

Herein, the nanostructured polypyrrole-coated MnO2 nanofibers growth on carbon cloth (PPy-MnO2-CC) to serve as the electrodes used in conjunction with a quasi-ionic liquid-based polymer gel electrolyte (urea-LiClO4-PVA) for solid-state symmetric supercapacitors (SSCs). The resultant PPy-MnO2-CC solid-state SSCs exhibited a high specific capacitance of 270 F/g at 1.0 A/g in a stable and wide potential window of 2.1 V with a high energy/power density (165.3 Wh/kg at 1.0 kW/kg and 21.0 kW/kg at 86.4 Wh/kg) along with great cycling stability (capacitance retention of 92.1% retention after 3000 cycles) and rate capability (141 F/g at 20 A/g), exceeding most of the previously reported SSCs. The outstanding performance of the studied 2.1 V PPy-MnO2-CC flexible SSCs could be attributed to the nanostructured PPy-coated MnO2 composite electrode and the urea-LiClO4-PVA polymer gel electrolyte design. In addition, the PPy-MnO2-CC solid-state SSCs could effectively retain their electrochemical performance at various bending angles, demonstrating their huge potential as power sources for flexible and lightweight electronic devices. This work offers an easy way to design and achieve light weight and high-performance SSCs with enhanced energy/power density.

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Efficient and Stable Photovoltaic Characteristics of Quasi-Solid State DSSC using Polymer Gel Electrolyte Based on Ionic Liquid in Organosiloxane Polymer Gels

Journal of Physics Conference Series ◽

10.1088/1742-6596/1011/1/012020 ◽

2018 ◽

Vol 1011 ◽

pp. 012020 ◽

Cited By ~ 2

Author(s):

H Pujiarti ◽

W S Arsyad ◽

Shobih ◽

L Muliani ◽

R Hidayat

Keyword(s):

Ionic Liquid ◽

Solid State ◽

Polymer Gels ◽

Gel Electrolyte ◽

Polymer Gel ◽

Polymer Gel Electrolyte ◽

Photovoltaic Characteristics

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Monolithic quasi-solid-state dye-sensitized solar cells based on iodine-free polymer gel electrolyte

Journal of Power Sources ◽

10.1016/j.jpowsour.2013.02.032 ◽

2013 ◽

Vol 235 ◽

pp. 243-250 ◽

Cited By ~ 17

Author(s):

Yaoguang Rong ◽

Xiong Li ◽

Guanghui Liu ◽

Heng Wang ◽

Zhiliang Ku ◽

...

Keyword(s):

Solar Cells ◽

Solid State ◽

Dye Sensitized Solar Cells ◽

Gel Electrolyte ◽

Polymer Gel ◽

Polymer Gel Electrolyte ◽

Dye Sensitized ◽

Sensitized Solar Cells

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Facile synthesis of carbon nanotube-supported NiO//Fe2O3 for all-solid-state supercapacitors

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.10.188 ◽

2019 ◽

Vol 10 ◽

pp. 1923-1932 ◽

Cited By ~ 5

Author(s):

Shengming Zhang ◽

Xuhui Wang ◽

Yan Li ◽

Xuemei Mu ◽

Yaxiong Zhang ◽

...

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Solid State ◽

Metal Oxides ◽

Reduction Method ◽

High Capacity ◽

Rate Capability ◽

High Energy ◽

High Energy Density ◽

Carbon Cloth

We have successfully prepared iron oxide and nickel oxide on carbon nanotubes on carbon cloth for the use in supercapacitors via a simple aqueous reduction method. The obtained carbon cloth–carbon nanotube@metal oxide (CC-CNT@MO) three-dimensional structures combine the high specific capacitance and rich redox sites of metal oxides with the large specific area and high electrical conductivity of carbon nanotubes. The prepared CC-CNT@Fe2O3 anode reaches a high capacity of 226 mAh·g−1 at 2 A·g−1 with a capacitance retention of 40% at 40 A·g−1. The obtained CC-CNT@NiO cathode exhibits a high capacity of 527 mAh·g−1 at 2 A·g−1 and an excellent rate capability with a capacitance retention of 78% even at 40 A·g−1. The all-solid-state asymmetric supercapacitor fabricated with these two electrodes delivers a high energy density of 63.3 Wh·kg−1 at 1.6 kW·kg−1 and retains 83% of its initial capacitance after 5000 cycles. These results demonstrate that our simple aqueous reduction method to combine CNT and metal oxides reveals an exciting future in constructing high-performance supercapacitors.

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A rationally designed self-standing V2O5 electrode for high voltage non-aqueous all-solid-state symmetric (2.0 V) and asymmetric (2.8 V) supercapacitors

Nanoscale ◽

10.1039/c8nr00805a ◽

2018 ◽

Vol 10 (18) ◽

pp. 8741-8751 ◽

Cited By ~ 17

Author(s):

Meena Ghosh ◽

Vidyanand Vijayakumar ◽

Roby Soni ◽

Sreekumar Kurungot

Keyword(s):

Solid State ◽

High Voltage ◽

Gel Electrolyte ◽

Asymmetric Supercapacitor ◽

Polymer Gel ◽

Polymer Gel Electrolyte ◽

Highly Efficient ◽

Aqueous Polymer

A highly efficient all-solid-state asymmetric supercapacitor device fabricated using electrodeposited V2O5 with a non-aqueous polymer gel electrolyte.

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Efficient Flexible All-Solid Supercapacitors with Direct Sputter-Grown Needle-Like Mn/MnOx@Graphite-Foil Electrodes and PPC-Embedded Ionic Electrolytes

Nanomaterials ◽

10.3390/nano10091768 ◽

2020 ◽

Vol 10 (9) ◽

pp. 1768

Author(s):

Apurba Ray ◽

Delale Korkut ◽

Bilge Saruhan

Keyword(s):

Solid State ◽

Photoelectron Spectroscopy ◽

Electrode Materials ◽

High Energy ◽

Polymer Gel ◽

Graphite Foil ◽

Polymer Gel Electrolyte ◽

X Ray ◽

Long Cycle ◽

Capacitance Performance

Recent critical issues regarding next-generation energy storage systems concern the cost-effective production of lightweight, safe and flexible supercapacitors yielding high performances, such as high energy and power densities as well as a long cycle life. Thus, current research efforts are concentrated on the development of high-performance advance electrode materials with high capacitance and excellent stability and solid electrolytes that confer flexibility and safety features. In this work, emphasis is placed on the binder-free, needle-like nanostructured Mn/MnOx layers grown onto graphite-foil deposited by reactive sputtering technique and to the polymer gel embedded ionic electrolytes, which are to be employed as new flexible pseudocapacitive supercapacitor components. Microstructural, morphological and compositional analysis of the layers has been investigated by X-ray diffractometer (XRD), Field Emission Scanning Electron Microscope (FE–SEM) and X-ray photoelectron spectroscopy (XPS). A flexible lightweight symmetric pouch-cell solid-state supercapacitor device is fabricated by sandwiching a PPC-embedded ionic liquid ethyl-methylimidazolium bis (trifluoromethylsulfonyl) imide (EMIM)(TFSI) polymer gel electrolyte (PGE) between two Mn/MnOx@Graphite-foil electrodes and tested to exhibit promising supercapacitive behaviour with a wide stable electrochemical potential window (up to 2.2 V) and long-cycle stability. This pouch-cell supercapacitor device offers a maximum areal capacitance of 11.71 mF/cm2@ 0.03 mA/cm2 with maximum areal energy density (Ea) of 7.87 mWh/cm2 and areal power density (Pa) of 1099.64 mW/cm2, as well as low resistance, flexibility and good cycling stability. This supercapacitor device is also environmentally safe and could be operated under a relatively wide potential window without significant degradation of capacitance performance compared to other reported values. Overall, these rationally designed flexible symmetric all-solid-state supercapacitors signify a new promising and emerging candidate for component integrated storage of renewable energy harvested current.

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Highly Ordered TiO2 Nanotube Electrodes for Efficient Quasi-Solid-State Dye-Sensitized Solar Cells

Energies ◽

10.3390/en13226100 ◽

2020 ◽

Vol 13 (22) ◽

pp. 6100

Author(s):

A Reum Lee ◽

Jae-Yup Kim

Keyword(s):

Solar Cells ◽

Solid State ◽

Dye Sensitized Solar Cells ◽

Tio2 Nanotube ◽

Gel Electrolyte ◽

Polymer Gel ◽

Polymer Gel Electrolyte ◽

Photovoltaic Properties ◽

Dye Sensitized ◽

Sensitized Solar Cells

Free-standing TiO2 nanotube (NT) electrodes have attracted much attention for application in solid- or quasi-solid-state dye-sensitized solar cells (DSSCs) because of their suitable pore structure for the infiltration of solid electrolytes. However, few studies have been performed on the relationship between nanostructures of these NT electrodes and the photovoltaic properties of the solid- or quasi-solid-state DSSCs. Here, we prepare vertically aligned and highly ordered TiO2 NT electrodes via a two-step anodization method for application in quasi-solid-state DSSCs that employs a polymer gel electrolyte. The length of NT arrays is controlled in the range of 10–42 μm by varying the anodization time, and the correlation between NT length and the photovoltaic properties of quasi-solid-state DSSCs is investigated. As the NT length increases, the roughness factor of the electrode is enlarged, leading to the higher dye-loading; however, photovoltage is gradually decreased, resulting in an optimized conversion efficiency at the NT length of 18.5 μm. Electrochemical impedance spectroscopy (EIS) analysis reveals that the decrease in photovoltage for longer NT arrays is mainly attributed to the increased electron recombination rate with redox couples in the polymer gel electrolyte.

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