Limiting Current Density in Single-Ion-Conducting and Conventional Block Copolymer Electrolytes

• Main Authors: Balsara, N.P (Author), Chakraborty, S. (Author), Ho, A.S (Author), Hoffman, Z.J (Author)
• Format: Article
• Language: English
• Published: IOP Publishing Ltd 2022
• Subjects: Block copolymer electrolytes; Block copolymers; Conducting polymers; Conventional polymers; Current density; Ion conducting electrolytes; Ion-conducting; Ion-conducting polymers; Ions; Limiting current density; New approaches; Polyelectrolytes; Polymer electrolyte; Single ion; Symmetrics
• Online Access: View Fulltext in Publisher

 The limiting current density of a conventional polymer electrolyte (PS-PEO/LiTFSI) and a single-ion-conducting polymer electrolyte (PSLiTFSI-PEO) was measured using a new approach based on the fitted slopes of the potential obtained from lithiumpolymer-lithium symmetric cells at a constant current density. The results of this method were consistent with those of an alternative framework for identifying the limiting current density taken from the literature. We found the limiting current density of the conventional electrolyte is inversely proportional to electrolyte thickness as expected from theory. The limiting current density of the single-ion-conducting electrolyte was found to be independent of thickness. There are no theories that address the dependence of the limiting current density on thickness for single-ion-conducting electrolytes. © 2022 Electrochemical Society Inc.. All rights reserved.