Unveiling the Cation Exchange Reaction between the NASICON Li_1.5Al_0.5Ge_1.5(PO₄)₃ Solid Electrolyte and the pyr13TFSI Ionic Liquid

Abstract

Recently, the formation of the ceramic−ionic liquid composite has attracted huge interest in the scientific community. In this work, we investigated the chemical reactions occurring between NASICON LAGP ceramic electrolyte and ionic liquid pyr13TFSI. This study allowed us to identify the cation exchange reaction pyr13-Li occurring on the LAGP surface, forming a LiTFSI salt that was detected by the nuclear magnetic resonance analysis. In addition, using 6 Li foils, we succeeded in demonstrating that both LAGP and LiTFSI:pyr13TFSI participate in the diffusion of Li ions by the formation of an ionic bridge between two species.

Particle nanosizing and coating with an ionic liquid: two routes to improve the transport properties of Na3V2(PO4)2FO2

“…During electrochemical impedance spectroscopy measurements, NaTFSI can be formed at the surface of NVPFO 2 -Iono, while the cationic part of the ionic liquid attached on the NVPFO 2 surface transfers its charge to an inorganic material. 64 Thus, the measured conductivity would be that of Na + in the IL coating. However, this coating does not affect the Na + diffusion in the bulk of the NVPFO 2 material.…”

NMR Study of Lithium Transport in Liquid–Ceramic Hybrid Solid Composite Electrolytes

“…This allowed the thickness of the SIL coating on the ceramic particles to be calculated (Supporting Information C1). Sufficient particle surface coating by the SIL is necessary for good contact between ceramic particles and ionic liquids, enabling cation exchange to occur between these phases . Based on the geometric calculations presented in Supporting Information C1, the addition of 10 wt % LiG 4 TFSI results in a coating with an average thickness of 5 nm on the surface of these particles.…”

“…Based on the geometric calculations presented in Supporting Information C1, the addition of 10 wt % LiG 4 TFSI results in a coating with an average thickness of 5 nm on the surface of these particles. Therefore, lower quantities of SIL, such as the 5 wt % ionic liquid proposed by Paolella et al, are likely insufficient to cover particles completely similar to those presented here. Attraction between ionic liquid anions and the ceramic particle surface means that the SIL will likely first form a coating on the ceramic particles .…”

NASICONs‐type solid‐state electrolytes: The history, physicochemical properties, and challenges

“…Other strategies were also conducted to modify the interface, such as the addition of liquid electrolyte or the ionic liquid, the polymer buffer layer, and so on (Figure 6C,D). [114,133,134] For example, Gu, Hu, et al added N-methyl-N-propylpiperidinium-bis(fluorosulfonyl) imide (PP13FSI) ionic liquid as a wetting agent between Na 3 V 2 (PO 4 ) 3 cathode and NASICON electrolyte, achieved 90 mA h g −1 specific capacity, and was stable after 10 000 cycles under 10 C rate at RT. [114] Jing Yang et al Introduced a polydopamine (PDA) buffer layer between FeS 2 cathode and NASICON electrolyte to ensure intimate contact.…”