Effect of Anode Porosity and Temperature on the Performance and Lithium Plating During Fast-Charging of Lithium-Ion Cells
- Chemical Sciences and Engineering Division Argonne National Laboratory 9700 South Cass Avenue Lemont IL 60439 USA
- Center for Integrated Mobility Sciences National Renewable Energy Laboratory Golden CO 80401 USA
Twenty-four single-layer approximate to 32 mAh pouch cells are tested to determine the effect of electrode porosity on lithium plating. Twelve cells contain a graphite electrode that is 26% porous, and 47% for the other twelve. The cells are cycled using a 6-C charge and a C/2 discharge protocol at temperatures in the range of 20-50 degrees C. A macro-homogeneous electrochemical model and microstructure analysis tool set are used to help interpret experimental observations for the effect of anode porosity and ambient temperature on fast-charging performance. Additionally, comparison between the two also highlights gaps in current theoretical understanding that need to be addressed. In post-test examination, lithium plating is seen in all cells, regardless of porosity. Elevated temperature is shown to reduce the amount of lithium plating and improve initial fast-charge capacity, but also changes the rate of other, less well-understood degradation mechanisms. Apparent kinetic rate laws, At + Bt1/2, where A and B are constants, can be fit to most of the capacity loss and resistance increase data. The relative magnitudes of A and B change with temperature and porosity. The capacity loss data at 50 degrees C from the high-porosity cells are fit by a logistics rate law.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
- Grant/Contract Number:
- AC02-06CH11357; AC36-08GO28308
- OSTI ID:
- 1755739
- Alternate ID(s):
- OSTI ID: 1776808
OSTI ID: 1786413
- Report Number(s):
- NREL/JA--5700-77281; MainId:26227; UUID:21238707-6777-434f-8b3c-b77e699a4d12; MainAdminID:19068
- Journal Information:
- Energy Technology, Journal Name: Energy Technology Journal Issue: 1 Vol. 9; ISSN 2194-4288
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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