High energy density lithium ion cells/batteries with excellent electrochemical performance and safety

Li-ion batteries (LIBs) are currently the most important power source for a wide variety of applications such as cell phones, laptops, computers and other portable electronics. They are also considered as very promising storage/power systems for future electric/hybrid-electric powered transportation. Although clever cell design and improvements in cell subcomponents can bear potential for volume and weight reduction, major developments in high energy density cathode and anode active materials are essential. Li[Ni0.8Co0.1Mn0.1]O2, Li[Ni0.5Mn0.3Co0.2]O2, Li[Ni0.6Co0.2Mn0.2]O2 (NMC) and Li[Ni0.8Co0.15Al0.05]O2 (NCA) in particular are the most promising candidates for EVs among the next-generation of high energy density cells owing to their high capacity, outstanding rate capability, and low cost. Despite the advantages, increasing the Ni fraction in the NCM cathodes negatively impacts the lifetime and safety of the battery, particularly when higher cut-off voltages and high electrode packing densities are pursued.Therefore, successful development of a high-energy-density battery requires not only suitable material to accumulate and store energy, but also technology capable of controlling large amounts of energy and technology to ensure reliability and safety in the event of emergency. TO BE CONT’D

Faculty Supervisor:

Alexander McLean

Student:

Partner:

Electrovaya Corp;University of Toronto

Discipline:

Earth science

Sector:

Manufacturing

University:

University of Toronto

Program: