An electrochemical evaluation of state-of-the-art non-flammable liquid electrolytes for high-voltage lithium-ion batteries

Mitigating the Ion Transport Tortuosity in Composite Cathodes of All-Solid-State Batteries by Wet Milling of the Solid Electrolyte Particles

“…Lithium-ion batteries (LIBs) are ubiquitously used for powering electronic devices, increasingly being applied in electric cars, and for renewable energy storage. In the latter fields of application, improvements in gravimetric and volumetric energy density as well as in battery safety are important issues. − In this regard, all-solid-state batteries (ASSBs) are promising, since the usage of Li metal anodes in such batteries leads potentially to higher energy densities, and the replacement of liquid electrolytes by solid electrolyte (SE) reduces the risk of battery fires. − ASSBs are also promising with respect to power density, since the ionic conductivity of a number of solid Li + electrolytes, mostly multinary sulfide-based materials, exceeds that of standard carbonate-based liquid battery electrolytes. − Despite these potential advantages of ASSBs, a major challenge remains the establishment of good interfacial contacts between the solid particles inside the battery, i.e., good contact between the SE particles in the separator layer and in the composite cathode as well as between the cathode active material (CAM) particles and SE particles inside the composite cathode . In conventional LIBs, the liquid electrolyte penetrates the separator as well as the electrodes and ensures fast ion transport and good contacts between the electrolyte and active material particles.…”

Recent advances in all-solid-state batteries for commercialization

“…However, it has significant disadvantages such as poor thermal stability and potential leakage issues. [68][69][70] The poor thermal stability of organic liquid electrolytes can lead to thermal runaway and safety hazards, particularly under extreme conditions or during battery abuse. The flammability of electrolytes increases the risk of fire incidents and compromises the overall safety of EVs.…”

Enabling a non-flammable methyl(2,2,2-trifluoroethyl) carbonate electrolyte in NMC622–graphite Li-ion cells by electrode pre-passivation

“…A wide variety of novel liquid electrolytes for LIBs have been proposed, such as organophosphates, highly fluorinated molecules, and locally highly concentrated electrolytes. [1][2][3][4][5] A key consideration when substituting electrolyte components is the stability of the solid electrolyte interphase (SEI). The SEI is a surface layer on the graphite anode resulting from the passivation of the electrode surface.…”