Effects of lithium salt on chitosan-g-PMMA based polymer electrolytes

Jaafar, N. K.; Lepit, A.; Aini, Nazli Ahmad; Saat, Ahmad; Ali, Ab Malik Marwan; Yahya, Muhd Zu Azhan

doi:10.1179/143307511x13031890749136

Cited by 17 publications

(5 citation statements)

References 17 publications

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“…Herein, it is easy to calculate the number density of ion carriers (n) using Equation (16). Table 4 depicts the ion transport parameters and the corresponding ω min values of the whole electrolyte systems.…”

Section: Impedance and Ion Transport Parameters Studymentioning

confidence: 99%

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Plasticized Sodium-Ion Conducting PVA Based Polymer Electrolyte for Electrochemical Energy Storage—EEC Modeling, Transport Properties, and Charge-Discharge Characteristics

et al. 2021

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This report presents the preparation of plasticized sodium ion-conducting polymer electrolytes based on polyvinyl alcohol (PVA)via solution cast technique. The prepared plasticized polymer electrolytes were utilized in the device fabrication of electrical double-layer capacitors (EDLCs). On an assembly EDLC system, cyclic voltammetry (CV), electrical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), transfer number measurement (TNM) and charge–discharging responses were performed. The influence of plasticization on polymer electrolytes was investigated in terms of electrochemical properties applying EIS and TNM. The EIS was fitted with electrical equivalent circuit (EEC) models and ion transport parameters were estimated with the highest conductivity of 1.17 × 10−3 S cm−1 was recorded. The CV and charge-discharging responses were used to evaluate the capacitance and the equivalent series resistance (ESR), respectively. The ESR of the highest conductive sample was found to be 91.2 at the first cycle, with the decomposition voltage of 2.12 V. The TNM measurement has shown the dominancy of ions with tion = 0.982 for the highest conducting sample. The absence of redox peaks was proved via CV, indicating the charge storing process that comprised ion accumulation at the interfacial region. The fabricated EDLC device is stable for up to 400 cycles. At the first cycle, a high specific capacitance of 169 F/g, an energy density of 19 Wh/kg, and a power density of 600 W/kg were obtained.

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Section: Impedance and Ion Transport Parameters Studymentioning

confidence: 99%

“…The modification of SPEs is addressed to be eligible for applications in lithium batteries and other electrochemical devices [ 16 ]. The commercialization of SPEs has faced two main barriers, which are low ionic conductivity and insufficient mechanical property [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Plasticized Sodium-Ion Conducting PVA Based Polymer Electrolyte for Electrochemical Energy Storage—EEC Modeling, Transport Properties, and Charge-Discharge Characteristics

et al. 2021

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“…However, chitosan exhibits low conductivity at room temperature between 10 −10 and 10 −9 S cm -1 [9]. In the previous study, the conductivity of chitosan can be improved by adding lithium and ammonium-based salts [10,11], in which complexation takes place through the salt-polymer interaction. Nonetheless, its conductivity is influenced and dependent on the number of free conducting species and degree of dissociation of the salt.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterizations of o-nitrochitosan based biopolymer electrolyte for electrochemical devices

et al. 2019

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For the past decade, much attention was focused on polysaccharide natural resources for various purposes. Throughout the works, several efforts were reported to prepare new function of chitosan by chemical modifications for renewable energy, such as fuel cell application. This paper focuses on synthesis of the chitosan derivative, namely, O-nitrochitosan which was synthesized at various compositions of sodium hydroxide and reacted with nitric acid fume. Its potential as biopolymer electrolytes was studied. The substitution of nitro group was analyzed by using Attenuated Total Reflectance Fourier Transform Infra-Red (ATR-FTIR) analysis, Nuclear Magnetic Resonance (NMR) and Elemental Analysis (CHNS). The structure was characterized by X-ray Diffraction (XRD) and its thermal properties were examined by using differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). Whereas, the ionic conductivity of the samples was analyzed by electrochemical impedance spectroscopy (EIS). From the IR spectrum results, the nitro group peaks of O-nitrochitosan, positioned at 1646 and 1355 cm -1 , were clearly seen for all pH media. At pH 6, O-nitrochitosan exhibited the highest degree of substitution at 0.74 when analyzed by CHNS analysis and NMR further proved that C-6 of glucosamine ring was shifted to the higher field. However, the thermal stability and glass transition temperatures were decreased with acidic condition. The highest ionic conductivity of O-nitrochitosan was obtained at ~10 −6 cm -1 . Overall, the electrochemical property of new O-nitrochitosan showed a good improvement as compared to chitosan and other chitosan derivatives. Hence, O-nitrochitosan is a promising biopolymer electrolyte and has the potential to be applied in electrochemical devices.

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“…Aziz et al [9] have obtained and it has reported a conductivity value of 8.57×10 −4 S•cm −1 for CS/40 wt% NH4SCN with 40 wt% of glycerol. Jaffar et al [7] have reported ionic conductivity of 4.05×10 −5 S•cm −1 for Chitosan-g-PMMA with 60 wt% LiTf salt. Ionic conductivity of 3.57×10 −5 S•cm −1 has been reported by Wang et al [2] for 90 wt% CA/10 wt% Mg(Tf)2 with 10 wt% of EMITf.…”

Section: Introductionmentioning

confidence: 99%

“…Chitosan-g-PMMA is a grafted polymer electrolyte based on grafting between chitosan and poly(methyl methacrylate) (PMMA). The gamma radiation induced graft polymerization technique was used to prepare a grafted copolymer (chitosan-gpoly(methyl methacrylate)) (PMMA) [7]. The magnesium triflate, Mg(Tf)2 was selected as a salt due to its big size of anions (Tf − ) as it can effectively dissociate and produce ions.…”

Section: Introductionmentioning

confidence: 99%

Structure and Electrical Properties of Polymer Electrolyte Based on Plasticized Chitosan Grafted Polymethyl Methacrylate (Ch-g-PMMA)- Magnesium Triflate for Electrochemical Double Layer Capacitor

Ismadi,

Jaafar,

Yusoff

2024

Trends Sci

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Polymer electrolytes have received much attention as materials used in batteries, supercapacitors, sensors and solar cells. Most of the polymer electrolytes reported are based on synthetic polymer, therefore it is difficult to recycle as it has poor degradability and ends up being a waste. In recent years, biopolymers gained much interest in replacing environmentally unfriendly polymers. Various studies have been done to accomplish polymer electrolytes with high conductivity and long-term safety. This study’s objective is to prepare plasticized Ch-g-PMMA-based polymer electrolyte by introducing the magnesium triflate salt and glycerol plasticizer. The grafted polymer of Ch-g-PMMA was prepared using gamma (γ) radiation. The grafted polymer of Ch-g-PMMA with 0.4 g of Mg(Tf)2 and different concentrations of glycerol has been prepared by using the solution casting technique. To achieve this study, the prepared plasticized Ch-g-PMMA-Mg(Tf)2 polymer electrolytes are characterized by XRD, FTIR, EIS and LSV techniques. XRD was carried out to determine the change in crystallinity and the amorphous structure of the plasticized Ch-g-PMMA-Mg(Tf)2 polymer. FTIR reveals the occurrence of complexation between Ch-g-PMMA polymer, Mg(Tf)2 salt and glycerol plasticizer. The grafted Ch-g-PMMA-Mg(Tf)2 was added with different concentrations of glycerol from 0 to 50 wt%. The Ch-g-PMMA-Mg(Tf)2 polymer electrolyte with 50 wt% of glycerol shows the highest ionic conductivity of 1.50×10−4 S·cm−1 compared with other samples. The increase in mobility of ions and the number of charge carriers has enhanced ionic conductivity. Based on the LSV analysis, the highest conducting Ch-g-PMMA-Mg(Tf)2 polymer with 50 wt% of glycerol was found electrochemically stable up to 3.2 V. The goal of this study is to determine the structure and electrical properties as well as the window stability of plasticized Ch-g-PMMA-Mg(Tf)2. The best outcome was produced by adding the 50 wt% of glycerol into the Ch-g-PMMA-Mg(Tf)2 which increased further by 1 order of magnitude. HIGHLIGHTS The ionic conductivity of the Ch-g-PMMA increases by introducing magnesium triflate salt and glycerol plasticizer which enhance the amorphous state and decrease the crystallinity The prepared plasticized Ch-g-PMMA-Mg(Tf)2 polymer electrolytes are characterized by XRD, FTIR, EIS and LSV techniques The highest ionic conductivity are obtained by added 50 wt% glycerol to the grafted polymer CH-g-PMMA-Mg(Tf)2 which is 1.50×10−4 S·cm−1 GRAPHICAL ABSTRACT

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Effects of lithium salt on chitosan-g-PMMA based polymer electrolytes

Cited by 17 publications

References 17 publications

Plasticized Sodium-Ion Conducting PVA Based Polymer Electrolyte for Electrochemical Energy Storage—EEC Modeling, Transport Properties, and Charge-Discharge Characteristics

Plasticized Sodium-Ion Conducting PVA Based Polymer Electrolyte for Electrochemical Energy Storage—EEC Modeling, Transport Properties, and Charge-Discharge Characteristics

Synthesis and characterizations of o-nitrochitosan based biopolymer electrolyte for electrochemical devices

Structure and Electrical Properties of Polymer Electrolyte Based on Plasticized Chitosan Grafted Polymethyl Methacrylate (Ch-g-PMMA)- Magnesium Triflate for Electrochemical Double Layer Capacitor

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