”Lithium-ion batteries (LIBs) provide great potential for electric vehicles, and smart grids as future energy-storage devices. However, there are many challenges in the development of the LIB industry, including low energy and power density of electrode materials, poor rate performance, short cycle life of electrode materials, and safety issues caused by the flammability of the conventional organic liquid electrolytes.
In this research, we were committed to using general approach to efficiently and economically synthesize or modify LIB materials by stabilizing the interface between electrode and electrolyte. Atomic layer deposition (ALD) method was used to coat metal oxide thin films on commercial electrode materials, which assisted the electrodes to form a beneficial interface layer and protected the active materials from organic liquid electrolyte, improved the conductivity of the active material, and led to an improved electrochemical performance of the material. The problem of uneven distribution of polyvinylidene fluoride (PVDF) binder had been solved using an extremely simple heat treatment method, which led to a stable and inorganic-riched solid electrolyte interphase (SEI) layer that improved the specific capacities and capacity retentions of the anode electrodes. A low liquid leakage ceramic polymer electrolyte (CPE) with high porosity, thermal and electrochemical stability, and ionic conductivity was synthesized to solve the safety issue of the uncontrolled growth of lithium dendrites in the conventional LIBs. Ultra-thin ZrO2 films were coated on cathode particles by ALD to reduce the interfacial resistance for all-solid-state battery, which improved lithium ions transport and suppressed undesirable interfacial side reactions”--Abstract, page iv.
Ludlow, Douglas K.
Chemical and Biochemical Engineering
Ph. D. in Chemical Engineering
Missouri University of Science and Technology
Journal article titles appearing in thesis/dissertation
- Application of Atomic Layer Deposition on Lithium-Ion Batteries: A Review
- Li4Ti5O12 coated with ultrathin aluminum-doped zinc oxide films as an anode material for lithium-ion batteries
- Simple Approach: Heat Treatment to Improve the Electrochemical Performance of Commonly Used Anode Electrodes for Lithium-Ion Batteries
- High Safety and Long-Life Lithium Batteries with Low Leakage and High Wettability Ceramic-Polymer Electrolyte
- Stabilizing the Interface of All Solid State Electrolyte Against Cathode Electrode with Atomic Layer Deposition
xix, 199 pages
© 2020 Ye Jin, All rights reserved.
Dissertation - Open Access
Jin, Ye, "Strategies to improve the electrochemical performance of lithium-ion batteries by stabilizing the interface of electrode/electrolyte" (2020). Doctoral Dissertations. 2953.