A mixed mechanochemical-ceramic solid-state synthesis as simple and cost effective route to high-performance LiNi0.5Mn1.5O4 spinels.

Enhancement of Functional Properties of Liquid Electrolytes for Lithium‐Ion Batteries by Addition of Pyrrolidinium‐Based Ionic Liquids with Long Alkyl‐Chains

“…The drops conductivity values have a similar trend for both the T and P benchmark solutions above 0 °C, while the ionic conductivity more for the LiPF 6 based solution below 0 °C. As already reported in the literature,„ the addition of ILs slightly decrease the conductivity. In fact, both the IL‐added T‐ and P‐electrolytes show smaller values compared to the T and P benchmarks with a decreasing trend that follows the size of the alkyl chain being TC<TB<TA<T and PC<PB<PA<P. Contrary to the data reported by Guerfi et al .…”

“…[13,14] Their substitution with low flammable ionic liquids (ILs) have been proved to reduce the risk of thermal runaway and overall hazard of LIBs. [15][16][17][18] ILs are low-temperature molten salts, usually formed by a large ammonium quaternary cation and a charge delocalized anion. They have been intensively studied as potential electrolyte solvents in batteries, thanks to their advantageous properties such as the low vapor pressure, thermal stability in a wide temperature range and high ionic conductivity.…”

“…Turning to solvents, alkyl carbonates used as solvents are highly flammable, volatile and toxic . Their substitution with low flammable ionic liquids (ILs) have been proved to reduce the risk of thermal runaway and overall hazard of LIBs . ILs are low‐temperature molten salts, usually formed by a large ammonium quaternary cation and a charge delocalized anion.…”

“…To overcome these issues, a common strategy is the addition of an IL to an organic solvents‐based electrolytes . Several works demonstrated the synergistic effect of the two components leading to lower viscosity, higher conductivity at room temperature as well as improved safety in terms of thermal stability and flammability The IL organic solvent based electrolytes results in a good compromise between safety and conductivity and it represent an advantage in terms of costs, compared to the use of pure ILs.…”

The Effects of a Mixed Precipitant on the Morphology and Electrochemical Performance of LiNi0.5Mn1.5O4 Cathode Materials

“…The low-resolution images indicate that the spherical morphologies of as-prepared samples are basically well maintained and showed a trend that is consistent with the precursors. What we can further observe from the high-resolution images is that the primary sizes of S 12 are obviously larger than those of S 11 while smaller than those of S 21 and S 10 . In addition, the samples of S 01 and S 12 show the loose accumulation between primary particles with small pores distributed on the surfaces of microspheres, which may contribute to the improvement of rate performances.…”