Electrical and electrochemical studies on sodium ion-based gel polymer electrolytes

Isa, Khairul Bahiyah Md.; Othman, L.; Hambali, D.; Osman, Z.

doi:10.1063/1.4999867

Cited by 12 publications

(4 citation statements)

References 12 publications

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“…This result demonstrates the electrochemical stability of PSIL70 up to 4.2 V. No other trace is observed within this range of electrochemical stability, which signifies the purity of GPEs. Osman et al 65 reported the PVdF-HFP polymer and NaCF 3 SO 3 salt-based GPE having an ionic conductivity of ∼2.3 × 10 −3 S cm −1 which is comparable to our result, but the electrochemical stability was less than 3.0 V, which was not satisfactory. To investigate the sodium storage property and intercalation/de-intercalation potential in cathode Na[Ni 0.60 Mn 0.35 Co 0.05 ]O 2 (Na-NMC) through the prepared PSIL70 GPE, a half cell (Na-NMC/PSIL70/Na) containing Na-NMC as the cathode, PSIL70 as the GPE, and Na-metal as the reference electrode is prepared, and CV measurement was performed within the potential range 1.5− 4.2 V at a scan rate of 0.1 mV s −1 .…”

Section: Resultssupporting

confidence: 77%

Polar β-Phase PVdF-HFP-Based Freestanding and Flexible Gel Polymer Electrolyte for Better Cycling Stability in a Na Battery

et al. 2021

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The stable polar gel polymer electrolyte (GPE) of sodium salt and ionic liquid (IL) incorporated in the PVdF-HFP (polyvinylidine fluoride-co-hexafluoropropylene) matrix at high loading was synthesized for improved performance of the sodium battery. The 1 M sodium bis trifluoromethylsulfonyl imide salt (S) in 1-butyl-3-methylimidazolium bis trifluoromethylsulfonyl imide IL used to prepare salt-IL (SIL) solution was mixed with PVdF-HFP at different weight percentages to prepare polar GPE films. The polar β-phase PVdF-HFP in the GPE is generated by the incorporation of the above-prepared SIL. The temperature-and frequencydependent ionic conductivities with a scaling approach and dielectric relaxation analysis have been carried out for the prepared GPEs. The 70 wt % SIL containing GPE (PSIL70) shows excellent thermal stability up to 368 °C, high ionic conductivity (1.9 × 10 −3 S cm −1 at 30 °C), and sodium-ion transference number ∼0.27 with a wide electrochemical stability window (4.2 V vs Na/Na + at 30 °C). The optimized electrolyte PSIL70 is used to fabricate coin cell (Na/ PSIL70/Na-NMC) with the prepared Na-NMC cathode and Na-metal anode. The charge−discharge result shows that the specific discharge capacity of the cell is ∼108 mA h g −1 at 0.1 C (21 mA g −1 ). The capacity retention is 94% over 200 charge−discharge cycles at 0.2 C, showing high capacity with good retention for the sodium battery.

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Section: Resultssupporting

confidence: 77%

Polar β-Phase PVdF-HFP-Based Freestanding and Flexible Gel Polymer Electrolyte for Better Cycling Stability in a Na Battery

et al. 2021

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“…When SA is added, the number of free ions also gets larger until it is saturated. These ions get closer to one another, which decreases the free volumes and conductivity and thus shows nonlinearity of the conductivity …”

Section: Resultsmentioning

confidence: 99%

“…These ions get closer to one another, which decreases the free volumes and conductivity and thus shows nonlinearity of the conductivity. 52 In addition, the stretchable ionic conductors developed herein exhibited excellent self-healing capabilities. Generally, PVA-based hydrogel cross-linked by borax is known to exhibit excellent self-healing capabilities; 53 therefore, we examined how the self-healing ability is affected by the addition of SA.…”

Section: Mechanicalmentioning

confidence: 89%

Stretchable and Self-Healable Conductive Hydrogels for Wearable Multimodal Touch Sensors with Thermoresponsive Behavior

Kweon

Samanta

Won

et al. 2019

ACS Appl. Mater. Interfaces

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Multifunctional hydrogels with properties including transparency, flexibility, self-healing, and high electrical conductivity have attracted great attention for their potential application to soft electronic devices. The presence of an ionic species can make hydrogels conductive in nature. However, the conductivity of hydrogels is often influenced by temperature, due to the change of the internal nano/microscopic structure when temperature reaches the sol−gel phase transition temperature. In this regard, by introducing a novel surface-capacitive sensor device based on polymers with lower critical solution temperature (LCST) behavior, near-perfect stimulus discriminability of touch and temperature may be realized. Here, we demonstrate a multimodal sensor that can monitor the location of touch points and temperature simultaneously, using poly(N-isopropylacrylamide) (PNIPAAm) in hybrid poly(vinyl alcohol) (PVA) and sodium tetraborate decahydrate cross-linked hydrogels doped with poly(sodium acrylate) (SA) [w/w/w = 5:2.7:1−3]. This multimodal sensor exhibits a response time of 0.3 s and a temperature coefficient of resistance of −0.58% K −1 from 20 to 40 °C. In addition, the LCST behavior of PNIPAAmincorporated PVA/SA gels is investigated. Incorporation of LCST polymers into high-end hydrogel systems may contribute to the development of temperature-dependent soft electronics that can be applied in smart windows.

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“…[56] and Isa et al [57], respectively. Hence, it can be concluded that the present results are compatible with previous studies.…”

Section: Lithium-ion Transport Number Studiesmentioning

confidence: 99%

Evaluation on electrochemical properties of lithium ions battery-based PMMA-PLA blend incorporation of [EDIMP]TFSI hybrid gel polymer electrolyte

Mazuki

Kufian

Samsudin

2023

Preprint

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This study focuses on developing a novel hybrid gel polymer electrolyte (HGPEs) for lithium-ion batteries. The HGPEs are composed of a hybrid polymer of 80 wt.% PMMA and 20 wt.% PLA, doped with 20 wt.% LiTFSI and incorporated with various contents ionic liquid namely Ethyl-dimethyl-propylammonium bis(trifluoromethylsulfonyl)imide ([EDIMP]TFSI) are successfully prepared and the lithium-ion batteries performance were investigated. This work aims to investigate the influence of the ionic liquid on the electrical properties, cation transference number (tLi+), electrochemical stability window, and charge-discharge performance of the PMMA-PLA-LiTFSI HGPE system. Among the different samples tested, the HGPE containing 20 wt.% [EDIMP]TFSI (E-TFSI 20) exhibited the most promising results. It achieved an optimum ionic conductivity of 3.90 × 10− 3 S cm− 1, an increased tLi+ from 0.63 to 0.79, and an extended electrochemical stability window from 4.3V to 5V. Temperature dependence studies revealed that all the HGPE systems followed the Arrhenius characteristic, and their activation energies were calculated. Dielectric studies revealed ionic behavior and suitable capacitance with varying frequencies of the HGPEs system. The most favorable electrolyte was selected based on the highest ionic conductivity observed in each HGPE system. It was utilized in a Li metalǀHGPEsǀGraphite cell configuration. The discharge capacity of the cells using LiTFSI 20 and E-TFSI 20 electrolytes were measured as 152.06 mAh g− 1 and 71.15 mAh g− 1, respectively, at a current density of 3.72 A g− 1.

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Electrical and electrochemical studies on sodium ion-based gel polymer electrolytes

Cited by 12 publications

References 12 publications

Polar β-Phase PVdF-HFP-Based Freestanding and Flexible Gel Polymer Electrolyte for Better Cycling Stability in a Na Battery

Polar β-Phase PVdF-HFP-Based Freestanding and Flexible Gel Polymer Electrolyte for Better Cycling Stability in a Na Battery

Stretchable and Self-Healable Conductive Hydrogels for Wearable Multimodal Touch Sensors with Thermoresponsive Behavior

Evaluation on electrochemical properties of lithium ions battery-based PMMA-PLA blend incorporation of [EDIMP]TFSI hybrid gel polymer electrolyte

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