Revealing The Electrode and Electrolyte Microstructure in Li-Ion Batteries
Abstract
The proposed project will help to develop a scientifically sound fundamental understanding of battery chemistries and architectures., In particular, it will focus on characterizing electrode microstructure and electrode/electrolyte interfaces; these remain areas, where further study is needed to understand their influence on battery performance, long-term cycling stability, and safety. Altho,ugh the proposed project aims to carry out fundamental research in the field of Li-ion batteries, the effort will aim to coordinate, with and support a Navy initiative to develop and field inherently safe Li-ion battery systems based on a lithium-iron-phosphate ca,thode and a lithium-titanate anode. To this end, the research will be coordinated with a battery supplier company and the theoretic,al effort at Colorado School of Mines. In this proposed project, Northwestern University will carry out three-dimensional tomograph,ic imaging, electrochemical testing, and analysis of the battery electrodes. Northwestern will provide the three-dimensional tomogra,phic data on battery electrode structure on size scales from the atomic level to the electrode thickness, along with other character,ization including electrochemical impedance spectroscopy using a three-electrode technique. The Northwestern group will utilize a n,ew methodology that we recently developed to do atomic-scale 3D imaging of battery interfaces using atom probe tomography. This pro,posal aims to further develop this method and carry out systematic studies of interfaces in Li-ion battery materials systems of inte,rest to the Navy. Solid state batteries are an important new area that may well provide the excellent performance and stability des,irable fo ONR applications. The above methodologies will also be employed for studying the new electrode and electrolyte chemistrie,s utilized in solid-electrolyte batteries. These methods - including atomic-scale interfacial characterization, sub-micron-scale el,ectrode structural characterization, and EIS characterization with mechanistic modeling informed by the interfacial and microstructu,ral results - are expected to yield important new insights that will help improve solid state batteries.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 08, 2022
- Source ID
- N000142212747
Entities
People
- Scott A. Barnett
Organizations
- Northwestern University
- Office of Naval Research
- United States Navy