Development and supercapacitor application of ionic liquid-incorporated gel polymer electrolyte films

Ravi, M.; Wang, Jingwei; Fan, Youhua; Bengeppagari, Manjunatha; Chen, Jianjun; Tan, Mingyi

doi:10.1016/j.jiec.2017.10.009

Cited by 112 publications

(43 citation statements)

References 46 publications

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“…The CV curve shows the quasi-rectangular shape curve with small redox peak appearing, which suggests the pseudocapacitive nature of the MoSe 2 electrodes via ion intercalation/de-intercalation phenomenon. [46] The intermediate frequency region shows the transition point between the high and low-frequency regions, and it is denoted as "knee frequency" which is found to be about 1. The increase in the current range of the CV profile with an increase in scan rate from 5 to 200 mV s −1 suggests the excellent capacitive property of the MoSe 2 SCSPC device.…”

Section: Resultsmentioning

confidence: 99%

A High Efficacy Self‐Charging MoSe₂ Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

Pazhamalai

Krishnamoorthy

Mariappan

et al. 2018

Adv Materials Inter

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compartments, namely, (i) energy harvesting and (ii) energy storage in which the former generates the energy while the latter is used to store the generated energy. [6,7] Renewable energy sources such as solar, wind, hydropower, mechanical energy (piezoelectric/triboelectric nanogenerator), and electrochemical energy (fuel cells) are used as energy harvesting system, whereas batteries and supercapacitors are used as energy storing system in the design of selfcharging power system. [8][9][10][11][12] Renewable power source based self-charging power system such as coupling of the solar cell/ photovoltaics with the electrochemical energy storage are commercialized for making use of the photon energy into useful energy. [13,14] Hitherto, the utilization of biomechanical energy for the selfcharging system is still in research level, and further efforts are needed to be undertaken for practical applications. The concept of self-charging and/or self-powered system for harvesting and storing mechanical and/or biomechanical energy becomes plausible after the research findings of Wang and co-workers for the first time when they designed a self-powered system using nanogenerator (NG) and supercapacitor in 2012. [2] Up to date two different types of self-charging power cells have been reported such as (i) external powering and (ii) internally integrating the system. [8,[15][16][17] In the former case, the mechanical energy harvester is externally connected to the energy storage device using a rectifier, whereas the latter uses an all-in-one integrated system which will be beneficial for several applications in portable and wearable devices due to their miniaturized size. [18,19] The pulsating alternating current output of nanogenerator is the major concern for the practical application of NG based self-charging power cells (SCPCs) due to their low energy conversion efficiency. [7,20] Therefore, the design and development of high-performance self-charging power cell with high energy conversion efficiency are highly essential. In this scenario, integrated self-charging supercapacitor power cell (SCSPC) utilizing supercapacitor as energy storage device attracts much attention compared to batteries mainly due to the fast charging rates of a capacitive type electrode; it can scavenge/store the piezo-electrochemically generated Self-charging supercapacitor power cell (SCSPC) received much attention for harvesting and storing energy in an integrated device, which paves the way for developing maintenance free autonomous power systems for various electronic devices. In this work, a new type of SCSPC device is fabricated comprising 2D molybdenum di-selenide (MoSe 2 ) as an energy storing electrode with polyvinylidene fluoride-co-hexafluoropropylene/ tetraethylammonium tetrafluoroborate (PVDF-co-HFP/TEABF 4 ) ion gelled polyvinylidene fluoride/sodium niobate (PVDF/NaNbO 3 ) as the piezopolymer electrolyte. The fabricated SCSPC delivers a specific capacitance of 18.93 mF cm −2 with a specific energy of 37.90 mJ cm −2 at a specific power...

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Section: Resultsmentioning

confidence: 99%

A High Efficacy Self‐Charging MoSe₂ Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

Pazhamalai

Krishnamoorthy

Mariappan

et al. 2018

Adv Materials Inter

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“…As the scan rate is increased, the C s value is seen to decrease. It results in lowering the number of stored charges on the surface of the electrodes at a high scan rate, which, in turn, results in the increment of energy loss and decrease in the C s values [68]. To examine the charge-discharge process in the EDLC under the study, the galvanostatic technique is applied.…”

Section: And Edlc Characterizationmentioning

confidence: 99%

Glycerolized Li+ Ion Conducting Chitosan-Based Polymer Electrolyte for Energy Storage EDLC Device Applications with Relatively High Energy Density

et al. 2020

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In this study, the solution casting method was employed to prepare plasticized polymer electrolytes of chitosan (CS):LiCO2CH3:Glycerol with electrochemical stability (1.8 V). The electrolyte studied in this current work could be established as new materials in the fabrication of EDLC with high specific capacitance and energy density. The system with high dielectric constant was also associated with high DC conductivity (5.19 × 10−4 S/cm). The increase of the amorphous phase upon the addition of glycerol was observed from XRD results. The main charge carrier in the polymer electrolyte was ion as tel (0.044) < tion (0.956). Cyclic voltammetry presented an almost rectangular plot with the absence of a Faradaic peak. Specific capacitance was found to be dependent on the scan rate used. The efficiency of the EDLC was observed to remain constant at 98.8% to 99.5% up to 700 cycles, portraying an excellent cyclability. High values of specific capacitance, energy density, and power density were achieved, such as 132.8 F/g, 18.4 Wh/kg, and 2591 W/kg, respectively. The low equivalent series resistance (ESR) indicated that the EDLC possessed good electrolyte/electrode contact. It was discovered that the power density of the EDLC was affected by ESR.

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“…[110]. Among them, P(VdF-HFP) copolymer is mostly utilized to prepare IL-GPEs owing to the semicrystalline structure containing both crystalline and amorphous behaviors [111], while standard solution cast technique is frequently used in preparation of IL-GELs [112,113]. As reported, a solid-state EDLC with IL-GPEs can achieve higher capacitive performance than that using liquid electrolytes [114,115].…”

Section: Il Gel Polymer Electrolyte Instead Of Liquid Electrolyte Appmentioning

confidence: 99%

Ionic liquid electrolytes in electric double layer capacitors

et al. 2019

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Electric double layer capacitors (EDLCs), which store free charges on the electrode surface via non-Faradaic process, balanced by the electric double layer on the electrolyte side, exhibit excellent cycle stability and high power density. Though EDLCs are considered as promising energy storage devices, the charges stored on the electrode surface in EDLCs are much lower than those in batteries. Ionic liquids (ILs), as a new type of electrolytes in EDLCs, are capable to deliver high energy density, due to their excellent physicochemical properties and wide electrochemical window. In this review, we focus on the widely studied IL electrolytes for EDLCs, including pure ILs, IL/IL binary electrolytes, IL/organic solvent mixtures, as well as functionalized ILs, with attention on the relationship between the structures of different IL-based electrolytes and the energy storage properties in EDLCs. For imidazolium-and ammonium-based IL electrolytes which are most widely studied in EDLCs, the former generally have higher gravimetric specific capacitance, while the latter exhibit wider electrochemical window. The modifications of functional group substituted can be an effective strategy to enhance the gravimetric specific capacitance of the latter and thus improve the energy density of EDLCs.

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Development and supercapacitor application of ionic liquid-incorporated gel polymer electrolyte films

Cited by 112 publications

References 46 publications

A High Efficacy Self‐Charging MoSe₂ Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

A High Efficacy Self‐Charging MoSe₂ Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

Glycerolized Li+ Ion Conducting Chitosan-Based Polymer Electrolyte for Energy Storage EDLC Device Applications with Relatively High Energy Density

Ionic liquid electrolytes in electric double layer capacitors

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Development and supercapacitor application of ionic liquid-incorporated gel polymer electrolyte films

Cited by 112 publications

References 46 publications

A High Efficacy Self‐Charging MoSe2 Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

A High Efficacy Self‐Charging MoSe2 Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

Glycerolized Li+ Ion Conducting Chitosan-Based Polymer Electrolyte for Energy Storage EDLC Device Applications with Relatively High Energy Density

Ionic liquid electrolytes in electric double layer capacitors

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A High Efficacy Self‐Charging MoSe₂ Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

A High Efficacy Self‐Charging MoSe₂ Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte