are used in many portable electronic products and also in electric vehicles.
Advantages of lithium batteries are their high energy density, high voltage,
long lifetime, low self-discharge. In addition, lithium batteries are environmentally
friendly. The cathode material LiNi0.5Mn1.5O4 has a 4.75V discharge platform.
This is higher than traditional materials. Application of this cathode material
can enhance the energy density and power density of lithium batteries. As
conventional electrolytes have an electrochemical window of around 4.5 V, a new
electrolyte with a wider electrochemical window needs to be found. In this
project, new types of electrolytes for high voltage lithium batteries are
explored. It is examined if ionic liquids as a part of the electrolyte material
can improve the cyclic life and safety of such lithium batteries. The
electrolytes can contain different ratios and types of ionic liquids, different
organic materials, and different lithium salts with different concentrations.
the physical and chemical properties of electrolytes with ionic liquids,
including purity, density, viscosity, conductivity, melting point, and electrochemical
the phase diagrams of possible electrolyte materials.
the Li+ diffusion regularity in ionic liquids-based electrolytes at different
Experience with experimental work and thermodynamics