In this report, we have prepared the imidazoliumbased ionic liquid-incorporated interpenetrating polymer network (IPN) electrolyte membrane containing cellulose triacetate with polyethylene glycol dimethyl acrylate and polyethylene oxide by the UV-induced polymerization method. A facile IPN electrolyte membrane appears to be homogeneous in nature with high mechanical strength, excellent thermal stability, and exhibits optimum ionic conductivity of the order of 2.84 × 10 −3 S cm −1 . The oxidative stability of the IPN electrolyte membrane is observed up to 5.2 V at room temperature, which is attributed to immobilized ion networks provided by the imidazolium ionic liquid. The IPN electrolyte membrane is galvanostatically cycled having battery configuration Li/IPN EM/LiFePO 4 , which shows the first discharge capacity of 110 mA h g −1 at 0.05 C with 93.65% Coulombic efficiency at room temperature. The cell shows discharge capacities of about 85, 82, and 76 mA h g −1 at 0.1, 0.2, and 1 C rates, respectively. The ionic liquid-incorporated IPN electrolyte membrane provides a promising system for stabilizing lithium electrodeposition and fabricating high-performance lithium-ion batteries. Finally, IPN electrolyte membranes could be a potential electrolytes for next-generation high-power and safer solid-state battery technology.
In this work, a fresh approach has been proposed for the efficient transfer of gold nanoparticles (AuNPs) from an aqueous to organic phase by the metathesis reaction or anion exchange reaction. Here, we synthesized ionic liquid 1-butyl 3-hexadecyl imidazolium bromide [C 4 C 16 Im]-Br-stabilized AuNPs which exhibit excellent stability in solution. Transfer of Au@[C 4 C 16 Im]Br from an aqueous to organic phase was investigated by the metathesis reaction with different hydrophobic ionic liquid-forming salts such as LiNTf 2 , LiClO 4 , and KPF 6 . The anionic exchange process in ionic liquids at the AuNP surface to make hydrophilic to hydrophobic AuNPs is demonstrated. It was found that hydrophobic ionic liquids provide the most effective transfer of AuNPs from the aqueous to organic phase. Interestingly, we have noticed no change in color, size, and shape of AuNPs for more than a month, indicating more efficient transfer of AuNPs in organic solvents, which remained stable for over a month. The ionic liquids with anions NTf 2 − , ClO 4 − , and PF 6 − make the AuNP surface hydrophobic, indicating their good dispersibility in nonpolar solvents. Finally, these AuNPs exhibit excellent sensitivity toward the refractive index of organic solvents, which is correlated with the surface plasmon resonance (SPR) λ SPR bands.
Organic redox active molecules are the promising electrode materials for the Lithium‐ion batteries (LIBs). The semiconducting nature and morphology of these materials provide more efficient charge transport. Hence, it is very important to perform systematic study of such molecules. Herein, we proposed single step synthesis of the benzoic naphthalene diimide (Benzoic‐NTCDI) by the reaction of 1, 4, 5, 8‐ naphthalene tetracarboxylic dianhydride with 4‐amino benzoic acid in presence of hydrated zinc acetate as a catalyst. As‐synthesized benzoic NTCDI is characterised by using different characterization techniques. The morphological study clearly demonstrate hierarchical porous assembly of 3–5 micron comprised with nanopetals of thickness 5–10 nm. In this hierarchical nanostructure, the nanopetals are originated from the centre and confer voids between the layers of petals. This creates porosity throughout the hierarchical assembly. Considering such unique porous nanostructure and good conductivity of the Benzoic‐NTCDI (1.19×10−5 S/m), it has been used as a cathode for LIB.The Li‐cell was fabricated using Benzoic‐NTCDI as a cathode which demonstrated the reversible capacity of 102 mAhg−1 at 0.05 C rate. Moreover, the capacity of 91 mAhg−1 is retained at current density of 0.1 C exhibiting good rate capability after 24 cycles. The Li‐ion transport has been accelerated is ascribed to the porous hierarchical nanostructure. The potential of one of the heterocyclic molecule with hierarchical nanostructure as a cathode for lithium ion batteries (LIBs) has been demonstrated for the first time
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