In:
Journal of Solid State Electrochemistry, Springer Science and Business Media LLC
Abstract:
The theoretically possible energy and power densities of rechargeable batteries are practically limited by resistances as these lead to overvoltages, particularly pronounced at kinetically harsher conditions, i.e., high currents and/or low temperature. Charge transfer resistance ( R ct ), being a major type of resistance alongside with Ohmic ( R Ω ) and mass transport ( R mt ), is related with the activation hindrance of electrochemical reactions. Its practical relevance is discussed within this work via analyzing $$\mathrm{Li}\mid \,\, \mid\mathrm{Li}$$ Li ∣ ∣ Li cells with the galvanostatic/constant current (CC) technique. R ct at Li|electrolyte interfaces is shown to be relevantly impacted by electrode–electrolyte interphases; implying the electrolyte type, as well. While solid polymer electrolytes (SPEs), e.g., based on poly(ethylene) oxide (PEO), show negligible R ct , it is evident for commercial liquid electrolytes and readily increase during storage. Given the asymptotic overvoltage vs. current behavior of R ct , obeying Butler-Volmer equation, R ct gets less relevant at enhanced currents, as experimentally validated, finally pointing to the dominance of R Ω and (depending on system) R mt in the overall resistance. Graphical Abstract
Type of Medium:
Online Resource
ISSN:
1432-8488
,
1433-0768
DOI:
10.1007/s10008-023-05792-4
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2024
detail.hit.zdb_id:
1478940-1
