Browsing by Subject "Li-ion batteries"
Now showing items 1-11 of 11
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Binder Effects on Si-Alloy Electrode Performance
(2020-11-16)Si-based anodes have been investigated to improve the energy density of Li-ion batteries due to their high volumetric capacity. However, huge volume changes of Si-based materials can cause severe particle fracture, leading ... -
CHANGES TO THE ELECTROLYTE IN AGED LI-ION CELLS
(2018-08-15)Electrolyte composition is crucial to the lifetime, cycling capability and safety of Li-ion cells. Many studies have measured electrolyte changes after formation or during the first few charge and discharge cycles, while ... -
COMPOSITIONAL AND FUNDAMENTAL CHARACTERIZATION OF LI-ION CELL ELECTROLYTES
(2020-08-25)The electrolyte is crucial to successful lithium ion cell operation. The composition, including the solvents and additives used will dictate how long the cell lasts. There are only a few studies that study the electrolytes ... -
EXTENDED LIFETIME AND INCREASED ENERGY DENSITY STUDIES FOR LI-ION CELLS
(2021-08-27)Strategies to improve Li-ion cells involve decreasing cost, increasing lifetime, increasing energy density, and increasing safety. This thesis presents work from two studies aimed at extending cell lifetime and improving ... -
HIGH PRECISION COULOMETRY AS A TECHNIQUE FOR EVALUATING THE PERFORMANCE AND LIFETIME OF LI-ION BATTERIES
(2011-08-25)The aim of this thesis is to develop a better understanding about the degradation mechanisms occurring within lithium-ion cells which eventually lead to their failure. An introduction to the components and operation of ... -
LAB-SCALE METHODS FOR CARBON COATING ONTO POWDERS AND APPLICATIONS FOR LI-ION BATTERIES
(2022-08-24)Carbon coating onto fine powders is a commonly used surface modification method in the field of materials science. This is an especially important method for Li-ion battery active materials, which are often carbon coated ... -
Li-ion Battery Materials Theory and Computation to Guide and Interpret Experiments
(2022-10-25)Li-ion batteries are enabling electrification; cell energy densities, lifetimes and cost render grid energy storage solutions and personal and commercial electric modes of transportation economically and practically ... -
STRUCTURAL AND ELECTROCHEMICAL STUDIES OF THE LI-MN-NI-O AND LI-CO-MN-O PSEUDO-TERNARY SYSTEMS
(2013-12-12)The improvement of volumetric energy density remains a key area of research to opti-mize Li-ion batteries for applications such as extending the range of electric vehicles. There is still improvement to be made in the ... -
Studies of the effects of electrolyte additives on the performance of lithium-ion batteries
(2016-01-14)Electrolyte additives are an effective way to improve the lifetime and performance of Li-ion cells. Electrolyte additives can modify the solid electrolyte interphase layers on the positive and/or negative electrodes, ... -
STUDY OF THE SURFACE REACTIVITY OF Ni-RICH POSITIVE ELECTRODE MATERIALS FOR Li-ION CELLS
(2020-09-01)The growth of surface impurities on positive electrode materials used in Li-ion cells is detrimental to the electrochemical performance of the cells. Ni-rich layered lithium metal oxides are promising materials for the ... -
A STUDY OF THE TRANSPORT PROPERTIES OF ELECTROLYTES FOR LI-ION BATTERIES
(2018-08-08)Measuring the transport properties of electrolyte solutions can be an effective way to screen for candidate electrolytes for use in a given Li-ion battery application. In this thesis, ionic conductivity and viscosity are ...