A novel boron-based ionic liquid electrolyte for high voltage lithium-ion batteries with outstanding cycling stability

Ordered LiNi0.5Mn1.5O4 Cathode in Bis(fluorosulfonyl)imide-Based Ionic Liquid Electrolyte: Importance of the Cathode–Electrolyte Interphase

“…The half-cell performance of H-LNMO with RTIL electrolyte is compared to other LNMO cathode-electrolyte pairs in Table S3 in Supporting Information. [14,17,[37][38][39][40] The high CE and impressive capacity retention of the H-LNMO cell cycled with RTIL electrolyte are attributed to the formation of a stable CEI on the surface of H-LNMO. Therefore, we extensively assessed the physical and chemical properties of the CEIs formed in both LP30 and RTIL electrolytes.…”

“…Rapid capacity decaying of H-LNMO cycled with LP30 at high temperatures is related to the thermal stability of LP30. At a high operating temperature, the LiPF 6 salt rapidly decomposes to form PF 5 , which not only forms hydrofluoric acid (HF) but also activates the ring-opening reaction of cyclic carbonate, resulting in a continuous side reaction on the surface of LNMO and the decomposition of the solvent. − The half-cell performance of H-LNMO with the RTIL electrolyte is compared to other LNMO cathode–electrolyte pairs in Table S3. ,,− …”

Novel piperidinium-based ionic liquid as electrolyte additive for high voltage lithium-ion batteries

“…The FSI and piperidine-N are the composition of the cathode protective SEI film, preventing further oxidation of the electrolyte. 48 …”

Halide‐Free Synthesis of New Difluoro(oxalato)borate [DFOB]−‐Based Ionic Liquids and Organic Ionic Plastic Crystals

“…Liang et al . developed a [DFOB] − ‐based electrolyte system consisting of 1‐methyl‐1‐propylpiperidinium [C 3 mpip][DFOB], LiTFSI and DMC that provided stability against Al corrosion and transition metal dissolution when using a Lithium Nickel Manganese Oxide and graphite electrode system [33,34] …”

“…[32] Liang et al developed a [DFOB] À -based electrolyte system consisting of 1-methyl-1propylpiperidinium [C 3 mpip][DFOB], LiTFSI and DMC that provided stability against Al corrosion and transition metal dissolution when using a Lithium Nickel Manganese Oxide and graphite electrode system. [33,34] In the aforementioned synthetic methods, undesired impurities may be present in the [DFOB] À -based ILs which could have an effect on its physical properties. For example, Seddon et al reported that the presence of halide impurities such as ~0.5 mol kg À 1 Cl À in [C 4 mim][BF 4 ] led to a 36 % increase in viscosity.…”