Nanofluidic voidless electrode for electrochemical capacitance enhancement in gel electrolyte

AbstractPorous electrodes with extraordinary capacitances in liquid electrolytes are oftentimes incompetent when gel electrolyte is applied because of the escalating ion diffusion limitations brought by the difficulties of infilling the pores of electrode with gels. As a result, porous electrodes usually exhibit lower capacitance in gel electrolytes than that in liquid electrolytes. Benefiting from the swift ion transport in intrinsic hydrated nanochannels, the electrochemical capacitance of the nanofluidic voidless electrode (5.56% porosity) is nearly equal in gel and liquid electrolytes with a difference of ~1.8%. In gel electrolyte, the areal capacitance reaches 8.94 F cm−2 with a gravimetric capacitance of 178.8 F g−1 and a volumetric capacitance of 321.8 F cm−3. The findings are valuable to solid-state electrochemical energy storage technologies that require high-efficiency charge transport.

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Gel Electrolyte Based Supercapacitors with Higher Capacitances and Lower Resistances than Devices with a Liquid Electrolyte

MRS Advances ◽

10.1557/adv.2018.312 ◽

2018 ◽

Vol 3 (22) ◽

pp. 1261-1267 ◽

Cited By ~ 1

Author(s):

Belqasem Aljafari ◽

Arash Takshi

Keyword(s):

Polymer Electrolytes ◽

Room Temperature ◽

Electrochemical Impedance ◽

Liquid Electrolyte ◽

Gel Electrolyte ◽

Superior Performance ◽

Energy Storage Devices ◽

Storage Devices ◽

Gel Electrolytes ◽

Further Development

ABSTRACTRecently, gel polymer electrolytes (GPEs) have been drawn noteworthy attention for different applications, specifically, for supercapacitors. GPEs could become an excellent substitute to liquid electrolytes (LEs) for making flexible and more durable devices. The performance of two different electrolytes (GPEs and LEs) in multi-wall carbon nanotube based supercapacitors were investigated. In spite of significantly lower conductivity of GPEs than LEs, devices with the gel electrolyte presented a superior performance. More focused has been given in this work on demonstrating the performance of supercapacitors based on GPEs and LEs at different concentrations of the acids ranging from 1M to 3M. Both electrolytes have been characterized at room temperature by making supercapacitors and using cyclic voltammetry, charging-discharging, electrochemical impedance spectroscopy, and leakage tests. The experimental results showed that GPE devices had much better capacitances and resistances compare to the LE based devices. Moreover, the capacitances of all devices were increased proportionally with the increase in the concentration from 1M to 3M, and the resistances were increased inversely with the decreased of concentration. The promising results from the gel electrolytes is encouraging for further development of flexible and high capacitance energy storage devices.

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Improving Pore Filling of Gel Electrolyte and Charge Transport in Photoanode for High-Efficiency Quasi-Solid-State Dye-Sensitized Solar Cells

ACS Applied Materials & Interfaces ◽

10.1021/am402856z ◽

2013 ◽

Vol 5 (17) ◽

pp. 8289-8293 ◽

Cited By ~ 15

Author(s):

Baohua Wang ◽

Shuai Chang ◽

Lawrence Tien Lin Lee ◽

Shizhao Zheng ◽

King Yong Wong ◽

...

Keyword(s):

Solar Cells ◽

Solid State ◽

Charge Transport ◽

High Efficiency ◽

Dye Sensitized Solar Cells ◽

Gel Electrolyte ◽

Pore Filling ◽

Dye Sensitized ◽

Sensitized Solar Cells

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Lithium-ion conductivity in Li6Y(BO3)3: a thermally and electrochemically robust solid electrolyte

Journal of Materials Chemistry A ◽

10.1039/c5ta09436d ◽

2016 ◽

Vol 4 (18) ◽

pp. 6972-6979 ◽

Cited By ~ 7

Author(s):

Beatriz Lopez-Bermudez ◽

Wolfgang G. Zeier ◽

Shiliang Zhou ◽

Anna J. Lehner ◽

Jerry Hu ◽

...

Keyword(s):

Energy Storage ◽

Solid Electrolyte ◽

Solid Electrolytes ◽

Lithium Ion ◽

Ion Conductivity ◽

Ion Diffusion ◽

New Energy ◽

Li Ion ◽

Lithium Ion Conductivity ◽

Storage Technologies

The development of new frameworks for solid electrolytes exhibiting fast Li-ion diffusion is critical for enabling new energy storage technologies.

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Deciphering lead and cadmium stripping peaks for porous antimony deposited electrodes

Materials Science-Poland ◽

10.1515/msp-2016-0063 ◽

2016 ◽

Vol 34 (2) ◽

pp. 233-241 ◽

Cited By ~ 3

Author(s):

Aqeel Ahmad Taimoor

Keyword(s):

Heavy Metal ◽

Photoelectron Spectroscopy ◽

Metal Ion ◽

Porous Electrodes ◽

Electrochemical Sensing ◽

Ex Situ ◽

Electrochemical Tests ◽

Diffusion Limitations ◽

Lead And Cadmium ◽

Cadmium And Lead

AbstractCadmium and lead are generally taken as model heavy metal ions in water to scale the detection limit of various electrode sensors, using electrochemical sensing techniques. These ions interact with the electrochemically deposited antimony electrodes depending on the diffusion limitations. The phenomenon acts differently for the in-situ and ex-situ deposition as well as for porous and non-porous electrodes. A method has been adopted in this study to discourage the stripping and deposition of the working ions (antimony) to understand the principle of heavy metal ion detection. X-ray photoelectron spectroscopy (XPS) technique was used to establish the interaction between the working and dissolved ions. In addition to the distinct peaks for each analyte, researchers also observed a shoulder peak. A possible reason for the presence of this peak was provided. Different electrochemical tests were performed to ascertain the theory on the basis of the experimental observations.

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Functionalized Thermoplastic Polyurethane Gel Electrolytes for Cosensitized TiO2/CdS/CdSe Photoanode Solar Cells with High Efficiency

Energy & Fuels ◽

10.1021/acs.energyfuels.0c03250 ◽

2020 ◽

Vol 34 (12) ◽

pp. 16847-16857

Author(s):

Ravi Prakash ◽

Pralay Maiti

Keyword(s):

Solar Cells ◽

High Efficiency ◽

Thermoplastic Polyurethane ◽

Gel Electrolytes

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A Nano Quasi-Solid Electrolyte With Modified Nano-Clay Applied to Dye-Sensitized Solar Cells

Journal of Solar Energy Engineering ◽

10.1115/1.4001407 ◽

2010 ◽

Vol 133 (1) ◽

Cited By ~ 13

Author(s):

Meng-Cheng Tsui ◽

Yung-Liang Tung ◽

Song-Yeu Tsai ◽

Chung-Wen Lan

Keyword(s):

Solar Cells ◽

Ionic Conductivity ◽

Solid Electrolyte ◽

Dye Sensitized Solar Cells ◽

Gel Electrolyte ◽

Dye Sensitized ◽

Liquid Electrolytes ◽

Nano Clay ◽

Sensitized Solar Cells ◽

Clay Type

The gel electrolytes for dye-sensitized solar cells (DSSCs) have been reported recently. Such electrolytes have their own liquid electrolyte properties and a quasi-solid electrolyte morphology. In this paper, nano-clay was chosen as gelator and mixed with liquid electrolytes to form clay type nanocomposite gel. This gel electrolyte consists of liquid electrolytes and surface modified nano-clay. The surface modifier makes nano-clay disperse well in liquid electrolytes. Nano-clay mixed with electrolyte will increase its viscosity and it is believed to be helpful in fabricating flexible DSSC. In general, an increase in viscosity will decrease ionic mobility and decrease photovoltaic conversion efficiency. The ionic conductivity was determined by the viscosity of the nano-clay gel with different surface modifiers. The ionic transfer rate of the nano-clay gel electrolyte is controlled by the diffusion and exchange reaction. The clay type gel electrolyte has higher ionic conductivity. Finally, the electrochemistry properties and the DSSC performances for the nano-clay type gel electrolyte have been discussed in this paper.

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High-efficiency platinum-free quasi-solid-state dye-sensitized solar cells from polyaniline (polypyrrole)-carbon nanotube complex tailored conducting gel electrolytes and counter electrodes

Electrochimica Acta ◽

10.1016/j.electacta.2017.12.066 ◽

2018 ◽

Vol 260 ◽

pp. 905-911 ◽

Cited By ~ 12

Author(s):

Xiao Jin ◽

Lai You ◽

Zhongping Chen ◽

Qinghua Li

Keyword(s):

Solar Cells ◽

Carbon Nanotube ◽

Solid State ◽

High Efficiency ◽

Dye Sensitized Solar Cells ◽

Counter Electrodes ◽

Dye Sensitized ◽

Gel Electrolytes ◽

Sensitized Solar Cells

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Valorization of lignin waste: high electrochemical capacitance of lignin-derived carbons in aqueous and ionic liquid electrolytes

Journal of Materials Chemistry A ◽

10.1039/c8ta07632d ◽

2018 ◽

Vol 6 (38) ◽

pp. 18701-18711 ◽

Cited By ~ 14

Author(s):

Wantana Sangchoom ◽

Darren A. Walsh ◽

Robert Mokaya

Keyword(s):

Ionic Liquid ◽

Energy Density ◽

Power Density ◽

High Power ◽

Electric Double Layer ◽

Electrode Materials ◽

High Energy ◽

Electrochemical Capacitance ◽

Liquid Electrolytes ◽

Double Layer Capacitors

Valorisation of waste lignin generates porous carbons with attractive properties as high-energy/high-power electrode materials for electric double layer capacitors (EDLCs), achieving an energy density of 25 W h kg−1at a power density of 500 W kg−1in ionic liquid electrolytes.

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