Studies on structural and ionic transport in biopolymer electrolytes based on alginate-LiBr

Fuzlin, A.F.; Nagao, Yuki; Misnon, Izan Izwan; Samsudin, A. S.

doi:10.1007/s11581-019-03386-7

Cited by 33 publications

(12 citation statements)

References 95 publications

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“…Figure 3(a) shows that the band shifted from a low to a higher wavenumber with the addition of LiNO 3 content. This shifting can be explained by the interaction between the C-O-C functional group in the CMC/PVA and Li + ion and the formed ion-dipole interaction [57]. Thus, this situation confirmed the interaction between the blended host polymer and ionic dopant.…”

Section: Resultssupporting

confidence: 63%

Improvement of Electrical Properties of CMC-PVA Doped with Various Contents of LiNO3 as an Application for Hybrid Polymer Electrolytes

Zulkifli

Mazuki

Samsudin

2021

MST

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The present work was carried out with the development of hybrid polymer electrolytes (HPEs) by using carboxymethyl cellulose (CMC)-polyvinyl alcohol (PVA) doped with different contents of lithium nitrate (LiNO 3 ) for the determination of their structural and conduction properties. The structural analysis was conducted by using Fourier transform infra-red spectroscopy and showed the interaction between the blend host polymer and ionic dopant, which formed via the coordinating site of CMC-PVA and Li + -NO 3 − . The complexes of CMC-PVA doped LiNO 3 led to an increment in ionic conductivity, as observed by electrical impedance spectroscopy, and the sample containing 20 wt% LiNO 3 obtained the highest ionic conductivity of 3.54 × 10 −3 S cm −1 at room temperature. The ionic conductivity at different temperatures (from 303 K to 343 K) was measured and found to obey the Arrhenius rule. The activation energies of the HPEs were computed based on the Arrhenius equation and were inversely proportional to the ionic conductivity. The highest ionic conducting sample was fabricated into an electrical double layer capacitor (EDLC). Cyclic voltammetry (CV) was used to study the electrochemical performance of the EDLC. A high value of C s was obtained at 2 mVs −1 due to the utilization of ions in the vacant sites of the electrode material. AbstrakPeningkatan Sifat Listrik CMC-PVA Didoping dengan berbagai Konten LiNO 3 sebagai Aplikasi untuk Elektrolit Polimer Hibrid. Karya ini dilakukan dengan pengembangan hibrida polimer elektrolit (HPE) dengan menggunakan karboksimetil selulosa (CMC) -polyvinyl alcohol (PVA) yang diolah dengan berbagai konten lithium nitrat (LiNO 3 ) untuk penentuan sifat struktural dan konduksi mereka. Analisis struktural telah dilakukan dengan menggunakan spektroskopi Fourier Transform Infra-red (FTIR) dan menunjukkan interaksi antara polimer host campuran dan dopan ion telah terjadi melalui situs koordinasi CMC-PVA dan Li + -NO 3− . Kompleks CMC-PVA yang didoping LiNO3 menyebabkan peningkatan konduktivitas ionik yang diamati dengan spektroskopi impedansi listrik (EIS) dan ditemukan bahwa sampel yang mengandung 20 wt% LiNO 3 memperoleh konduktivitas ionik tertinggi dengan 3.54 × 10 −3 S cm −1 pada suhu kamar. Konduktivitas ion pada suhu yang berbeda diukur dari 303 K hingga 343 K dan ditemukan mematuhi aturan Arrhenius. Energi aktivasi HPE dihitung berdasarkan persamaan Arrhenius dan ditunjukkan berbanding terbalik dengan konduktivitas ionik. Sampel konduktivitas ionik tertinggi dibuat menjadi kapasitor listrik lapisan ganda (EDLC). CV digunakan untuk mempelajari kinerja elektrokimia EDLC dan mendapatkan nilai C s yang tinggi pada 2 mVs −1 karena pemanfaatan ion di situs kosong bahan elektroda.

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Section: Resultssupporting

confidence: 63%

Improvement of Electrical Properties of CMC-PVA Doped with Various Contents of LiNO3 as an Application for Hybrid Polymer Electrolytes

Zulkifli

Mazuki

Samsudin

2021

MST

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“…The alginate/chitosan/PEO/neem extract (6%) composite was thermally more stable than composites with (2 and 4%) extract. The complexation-mediated reorganization of polymeric chains influenced thermal degradation shifting it to a lower temperature region (Fuzlin et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

Development of polymeric nanofibers blended with extract of neem (Azadirachta indica), for potential biomedical applications

et al. 2022

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In recent years, electrospinning has emerged as a promising technique for the preparation of nanofibers with unique properties like flexibility, high porosity and high surface area. In the context of nanodelivery systems, polymer-based nanofibers have become promising carriers of drugs and bioactive compounds ensuring their sustained release and targeted delivery. In this study, neem extract-loaded nanofibers were developed as sustained delivery systems using the electrospinning method. The chitosan, alginate and polyethylene oxide were used as the polymeric matrix for loading of aqueous extract of neem leaves. The prepared nanofibers NF1, NF2 and NF3 carrying 2%, 4% and 6% extract respectively were characterized using SEM, FTIR, XRD and TGA. Further, the as-prepared nanocomposites exhibited a high degree of swelling and dual-phase release of phytoconstituents. Moreover, the developed controlled delivery systems were tested for antifungal and antioxidant potential. Importantly, the bioactivities of the prepared nanofibers could be improved further by using organic extracts which are generally enriched with phytoconstituents. Herein, we selected biodegradable and mucoadhesive biopolymers and an aqueous extract of neem for the development of controlled-delivery nanofibers by electrospinning through a sustainable and cleaner production process. Thus, the prepared biocompatible nanofibrous systems with biphasic release profile could be employed for biomedical applications including wound dressing, soft tissue scaffolds and as transdermal carriers.

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“…CMC with plentiful hydrophilic groups contributes to the quasi-gel layer formation on the surface of Zn, where the water molecules will be captured through large amount of hydrogen bonds and the desolvation of [Zn(H 2 O) 6 ] 2+ into Zn 2+ will be promoted. The ionic dipole interaction and coulombic attraction force between Zn 2+ and C–O–C, COO – groups in CMC guarantee fast Zn 2+ transport kinetics through the interchain hopping mechanism. , On the other hand, the highly porous COP provides nanosized channels for harmonized electrolyte diffusion and abundant adsorption sites for Zn 2+ in the role of N atoms . What is more, it also offers a stable supporting skeleton for the flexible quasi-gel layer and accommodates the volume change during repetitive Zn plating/stripping.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The ionic dipole interaction and coulombic attraction force between Zn 2+ and C−O−C, COO − groups in CMC guarantee fast Zn 2+ transport kinetics through the interchain hopping mechanism. 62,63 On the other hand, the highly porous COP provides nanosized channels for harmonized electrolyte diffusion and abundant adsorption sites for Zn 2+ in the role of N atoms. 64 What is more, it also offers a stable supporting skeleton for the flexible quasi-gel layer and accommodates the volume change during repetitive Zn plating/stripping.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

In Situ Construction of a Multifunctional Quasi-Gel Layer for Long-Life Aqueous Zinc Metal Anodes

Ding

Liu

Huang

et al. 2021

ACS Appl. Mater. Interfaces

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Aqueous zinc (Zn)-ion batteries are considered very promising in grid-scale energy storage systems. However, the dendrite, corrosion, and H2 evolution issues of Zn anode have restricted their further applications. Herein, to solve these issues, a hydrophilic layer, consisting of a covalent organic polymer (COP) and carboxylmethyl cellulose (CMC), is designed to in situ construct a multifunctional quasi-gel (COP-CMC/QG) interface between Zn metal and the electrolyte. The COP-CMC/QG interface can significantly improve the rechargeability of the Zn anode through enhancing Zn2+ transport kinetics, guiding uniform nucleation, and suppressing Zn corrosion and H2 evolution. As a result, the COP-CMC-Zn anode exhibits a reduced overpotential (12 mV at 0.25 mA cm–2), prolonged cycle life (over 4000 h at 0.25 mA cm–2 and 2000 h at 5 mA cm–2 in symmetrical cells), and elevated full-cell (Zn/MnO2) performance. This work provides an efficient approach to achieve long-life Zn metal anodes and paves the way toward high-performance Zn-based and other metal-ion batteries.

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Studies on structural and ionic transport in biopolymer electrolytes based on alginate-LiBr

Cited by 33 publications

References 95 publications

Improvement of Electrical Properties of CMC-PVA Doped with Various Contents of LiNO3 as an Application for Hybrid Polymer Electrolytes

Improvement of Electrical Properties of CMC-PVA Doped with Various Contents of LiNO3 as an Application for Hybrid Polymer Electrolytes

Development of polymeric nanofibers blended with extract of neem (Azadirachta indica), for potential biomedical applications

In Situ Construction of a Multifunctional Quasi-Gel Layer for Long-Life Aqueous Zinc Metal Anodes

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