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Title: Analysis of Long-Range Interaction in Lithium-Ion Battery Electrodes

The lithium-ion battery (LIB) electrode represents a complex porous composite, consisting of multiple phases including active material (AM), conductive additive, and polymeric binder. This study proposes a mesoscale model to probe the effects of the cathode composition, e.g., the ratio of active material, conductive additive, and binder content, on the electrochemical properties and performance. The results reveal a complex nonmonotonic behavior in the effective electrical conductivity as the amount of conductive additive is increased. Insufficient electronic conductivity of the electrode limits the cell operation to lower currents. Once sufficient electron conduction (i.e., percolation) is achieved, the rate performance can be a strong function of ion-blockage effect and pore phase transport resistance. In conclusion, even for the same porosity, different arrangements of the solid phases may lead to notable difference in the cell performance, which highlights the need for accurate microstructural characterization and composite electrode preparation strategies.
 [1] ;  [1] ;  [1] ;  [2] ;  [1]
  1. Texas A&M Univ., College Station, TX (United States). Dept. of Mechanical Engineering
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 2381-6872
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Journal of Fuel Cell Science and Technology (Online)
Additional Journal Information:
Journal Name: Journal of Fuel Cell Science and Technology (Online); Journal Volume: 13; Journal Issue: 3; Journal ID: ISSN 2381-6872
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Computer Aided Engineering for Batteries (CAEBAT III) Program
Country of Publication:
United States
25 ENERGY STORAGE; lithium-ion battery; electrode microstructure; Binders (Materials); Electrons; conductivity limitation; ion blockage; partial pore blockage; influence on property/performance
OSTI Identifier: