Sodium hexafluorophosphate mediated enhancement of electrical and electrochemical properties of poly(vinyl alcohol)-chitosan solid polymer electrolytes for EDLCs

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F25%3A63596798" target="_blank" >RIV/70883521:28610/25:63596798 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlelanding/2025/ra/d5ra02897c" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2025/ra/d5ra02897c</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d5ra02897c" target="_blank" >10.1039/d5ra02897c</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Sodium hexafluorophosphate mediated enhancement of electrical and electrochemical properties of poly(vinyl alcohol)-chitosan solid polymer electrolytes for EDLCs

Popis výsledku v původním jazyce

A free-standing, flexible and biodegradable biopolymer electrolyte (BPE) derived from a poly(vinyl alcohol) (PVA)-chitosan (CS) blend immobilizing sodium hexafluorophosphate (NaPF6) salt was fabricated via solution casting method. The effect of salt concentration on the structural, electrical, and electrochemical properties of the electrolyte was systematically investigated. X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectroscopy were used to ascertain the microstructural changes in the polymer matrix including the complexation of PVA, CS, and NaPF6. Electrochemical impedance spectroscopy (EIS) measurements revealed that the BPE containing 40 wt% NaPF6 exhibited the highest conductivity (6.94 ± 0.04) × 10−5 S cm−1, which was three-order enhancement over the pristine system. The ion transport behaviour, interpreted through the Schütt and Gerdes (S-G) model, revealed that the ionic conductivity of the SPE system is strongly influenced by both the concentration of charge carriers and their mobility. The electrolyte displayed a predominant ionic nature with an electrochemical stability window of ∼3.25 V. When incorporated into an Na-ion EDLC, the optimized electrolyte sample provided a specific capacitance of 42.65 F g−1, energy density of 5.4 W h kg−1, and power density of 95 W kg−1, as determined by galvanostatic charge-discharge (GCD) tests performed at 0.05 mA g−1

Název v anglickém jazyce

Sodium hexafluorophosphate mediated enhancement of electrical and electrochemical properties of poly(vinyl alcohol)-chitosan solid polymer electrolytes for EDLCs

Popis výsledku anglicky

A free-standing, flexible and biodegradable biopolymer electrolyte (BPE) derived from a poly(vinyl alcohol) (PVA)-chitosan (CS) blend immobilizing sodium hexafluorophosphate (NaPF6) salt was fabricated via solution casting method. The effect of salt concentration on the structural, electrical, and electrochemical properties of the electrolyte was systematically investigated. X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectroscopy were used to ascertain the microstructural changes in the polymer matrix including the complexation of PVA, CS, and NaPF6. Electrochemical impedance spectroscopy (EIS) measurements revealed that the BPE containing 40 wt% NaPF6 exhibited the highest conductivity (6.94 ± 0.04) × 10−5 S cm−1, which was three-order enhancement over the pristine system. The ion transport behaviour, interpreted through the Schütt and Gerdes (S-G) model, revealed that the ionic conductivity of the SPE system is strongly influenced by both the concentration of charge carriers and their mobility. The electrolyte displayed a predominant ionic nature with an electrochemical stability window of ∼3.25 V. When incorporated into an Na-ion EDLC, the optimized electrolyte sample provided a specific capacitance of 42.65 F g−1, energy density of 5.4 W h kg−1, and power density of 95 W kg−1, as determined by galvanostatic charge-discharge (GCD) tests performed at 0.05 mA g−1

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

RSC Advances: an international journal to further the chemical sciences

ISSN

2046-2069

e-ISSN

—

Svazek periodika

15

Číslo periodika v rámci svazku

30

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

17

Strana od-do

24350-24366

Kód UT WoS článku

001525750200001

EID výsledku v databázi Scopus

2-s2.0-105010274773