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Factors Limiting Li+ Charge Transfer Kinetics in Li-ion Batteries

Show simple item record Jones, John-Paul Smart, Marshall C. Jow, T. Richard Allen, Jan L. Delp, Samuel A. 2020-04-21T00:29:47Z 2020-04-21T00:29:47Z 2017-10-01
dc.identifier.citation 2017 The Electrochemical Society (ECS) Meeting, National Harbor, Maryland, October 1-5, 2017 en_US
dc.identifier.clearanceno 18-0394
dc.description.abstract Understanding the factors limiting Li+ charge transfer kinetics in Li-ion batteries is essential in improving the rate performance, especially at lower temperatures. The Li+ charge transfer process involved in the lithium intercalation of graphite anode includes the step of de-solvation of the solvated Li+ in the liquid electrolyte and the step of transport of Li+ in the preformed solid electrolyte interphase (SEI) on electrodes until the Li+ accepts an electron at the electrode and becomes a Li in the electrode. Whether the de-solvation process or the Li+ transport through the SEI is a limiting step depends on the nature of the interphases at the electrode and electrolyte interfaces. Several examples involving the electrode materials such as graphite, lithium titanate (LTO), lithium iron phosphate (LFP), lithium nickel cobalt aluminum oxide (NCA) and solid Li+ conductor such as lithium lanthanum titanate or Li-Al-Ti-phosphate are reviewed and discussed to clarify the conditions at which either the de-solvation or the transport of Li+ in SEI is dominating and how the electrolyte components affect the activation energy of Li+ charge transfer kinetics. How the electrolyte additives impact the Li+ charge transfer kinetics at both the anode and the cathode has been examined at the same time in 3-electrode full cells. The resulting impact on Li+ charge transfer resistance, Rct, and activation energy, Ea, at both electrodes are reported and discussed. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2017 en_US
dc.subject limiting factor en_US
dc.subject de-solvation en_US
dc.subject SEI en_US
dc.subject lithium-ion batteries en_US
dc.subject lithium-ion charge transfer kinetics en_US
dc.title Factors Limiting Li+ Charge Transfer Kinetics in Li-ion Batteries en_US
dc.type Preprint en_US

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