Description
Lithium-ion batteries are widely used for high energy storage systems and most of the commercially manufactured lithium-ion batteries use liquid electrolytes and
polymeric separators. However, these electrolytes and polymeric separators pose safety
issues under high temperatures and in the event of short circuit which may lead to
thermal runaway and cause fire. The application of fire-retardant high salt concentrated
electrolytes can be used to address the safety issues that arises in the use of liquid
electrolytes, but these electrolytes have high viscosity and low wettability when used on
polymeric separators which are commercially used in lithium-ion batteries. To address
this issue, zeolite powder has been synthesized and separators were prepared by coating
on the electrode using scalable blade coating method. Zeolite separators have higher
wettability and electrolyte uptake compared to polymeric separators such as
polypropylene (PP) due to their intra-particle micropores. The zeolite separators also
have higher porosity compared to PP separators resulting in higher electrolyte uptake and
better electrochemical performance of the lithium-ion batteries. Zeolite separators have
been prepared using spherical-silicalite and plate-silicalite to analyze the effect of
morphology of the particles on the electrochemical performance of the cells. The platesilicalite separators have higher capacity retention during long-term cycling at low Crates and better capacity performance at high C-rates compared to spherical-silicalite.
Therefore plate-silicalite is very promising for the development of high-performance safe
lithium-ion batteries.
Details
Title
- Safe Li-Ion Batteries Using Electrode Coated Silicalite Separators For Improved Performance And Cycle Life
Contributors
- LINGAM MURALI, DHEERAJ RAM (Author)
- Lin, Jerry (Thesis advisor)
- Muhich, Christopher (Committee member)
- Torres, Cesar (Committee member)
- Arizona State University (Publisher)
Date Created
The date the item was original created (prior to any relationship with the ASU Digital Repositories.)
2022
Subjects
Resource Type
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Note
- Partial requirement for: M.S., Arizona State University, 2022
- Field of study: Chemical Engineering