Effect of SiO2 microstructure on ionic transport behavior of self-healing composite electrolytes for sodium metal batteries

Tailoring composite gel polymer electrolytes with regularly arranged pores and silica particles for sodium metal batteries via breath-figure self-assembly

“…Due to the strong hydrogen bonding between the carbonyl group of carbonate solvent and the hydroxyl group on the surface of silica particles, the peak corresponding to the hydroxyl group of silica in the soaked P-P3S7 shied to a lower wavenumber, which is not observed from the soaked GF. 36,37 Additionally, the PVH host in the P-P3S7 membrane also contributes to trapping the carbonate solvents primarily due to its high dielectric constant and electrolyte affinity. 38 The considerably higher electrolyte retention value of the P-P3S7 compared to the N-P3S7 indicates that the regularly distributed silica particles and pores in the P-P3S7 membrane significantly enhance the interactions between the membrane and carbonate solvents.…”

Opening and Constructing Stable Lithium‐ion Channels within Polymer Electrolytes

“…In contrast, LP and LPA SPEs display significant changes in current below 2.12 and 1.43 V, and above 3.95 and 4.33 V, suggesting an intense electrochemical reaction between lithium metal and the respective SPEs. [3] The LPAS SPE boasts improved electrochemical stability, allowing it to withstand a broader range of potentials and seamlessly connect with various commercial electrodes. The oxidation and reduction peaks of the cyclic voltammogram (CV) determine the reversibility of the electrochemical reaction.…”

“…The most commonly employed inorganic fillers are silicon dioxide (SiO 2 ), titanium dioxide (TiO 2 ), and aluminum oxide (Al 2 O 3 ), which can enhance the dissociation of lithium salt, expedite ion transportation, and mitigate the interfacial resistance between electrolyte and electrode. [3] The Lewis acid center of SiO 2 can effectively immobilize the bis(fluorosulfonyl)imide anion (TFSI À ), thereby facilitating the release of a higher concentration of free Li + . SiO 2 also exhibits promising flame-retardant properties, ensuring enhanced safety for SPE materials.…”

“…[5] Inorganic fillers into SPEs enhance their electrochemical properties and stability; what's more, this comes at the expense of an increase in the mechanical properties of the SPE due to nanoparticle inclusion. [3] The development of SPEs with efficient Li + migration capability remains a formidable challenge. Liu et al have discovered that nanosheet materials offer superior advantages and establish an extended Li + migration at the filler-polymer interface, facilitating rapid ion transport across multiple interfaces.…”