Engineering Commons^™

Improving Manufacturing Processes For Making Lithium Ion Battery Electrodes, Ming Wang

Theses and Dissertations--Chemical and Materials Engineering

Rechargeable lithium-ion batteries (LIBs) are widely used to provide energy and power in portable electronics, electric vehicles, and energy storage systems. The LIB market has grown dramatically as they have a combination of high energy density, high power density, proven reliability, and long cycle life. The manufacturing process is one of the key factors as it strongly affects the cost and performance of LIBs.

This dissertation is focused firstly on the development of a conventional slurry-based electrode manufacturing process. Slurry making is a critical step that affects the subsequent steps in battery manufacturing. In this work, we have investigated the …

Development Of Nanomaterials For Lithium-Ion Batteries By Atomic Layer Deposition, Biqiong Wang

Electronic Thesis and Dissertation Repository

Lithium ion batteries (LIBs) have been the dominant candidate in the field of energy storage. The ever-growing demand of high energy and power density, longer battery life, and more assured safety level has geared the development of LIBs towards all-solid-state batteries (ASSBs). The solid-state nature allows more flexibility in battery design and higher area capacity to be obtained within limited space. Moreover, replacing liquid electrolytes with solid-state electrolytes (SSEs) is a most effective approach to achieve safer battery system. In addition, ASSBs hold great promise in the actual fabrication of microbatteries for microelectronics. Therefore, a technique which can synthesize materials …

Understanding Electrical Conduction In Lithium Ion Batteries Through Multi-Scale Modeling, Jie Pan

Theses and Dissertations--Chemical and Materials Engineering

Silicon (Si) has been considered as a promising negative electrode material for lithium ion batteries (LIBs) because of its high theoretical capacity, low discharge voltage, and low cost. However, the utilization of Si electrode has been hampered by problems such as slow ionic transport, large stress/strain generation, and unstable solid electrolyte interphase (SEI). These problems severely influence the performance and cycle life of Si electrodes. In general, ionic conduction determines the rate performance of the electrode, while electron leakage through the SEI causes electrolyte decomposition and, thus, causes capacity loss. The goal of this thesis research is to design Si …