Novel approach for the utilization of ionic liquid-based cellulose derivative biosourced polymer electrolytes in safe sodium-ion batteries

摘要: Carboxymethyl cellulose (CMC) derived from kenaf bast fiber complexed with sodium acetate and integrated ionic liquid 1-butyl-3-methylimidazolium chloride, [Bmim]Cl, was investigated as potential biosourced polymer electrolyte. The highest conductivity of (4.54 ± 1.2) × 10−3 S cm−1 obtained after introducing 30 wt% [Bmim]Cl respect to the weight CMC. Infrared spectroscopic analysis revealed interaction host salt liquid. Ion transport showed that charge in biopolymer electrolyte system occurred predominately ion transference numbers 0.129. Linear sweep voltammetry result electrochemical stability reached ~ 2.9 V, showing is suitable for practical application devices. Sodium battery configurations Na/CH3COONa-30 wt% [Bmim]Cl/I2 + C + electrolyte were fabricated demonstrated an initial discharge capacity 1.5 mAh 200 h 1.6 V open circuit potential.