Format:
Online-Ressource
ISSN:
1614-6840
Content:
Abstract: The simple addition of a Zn (II) precursor to a preoptimized poly (carboxylic acid) binder solution enhances the electrochemical performance and cycle life of silicon‐based electrodes. The binder/cation couple forms a cross‐linked coordinated binder that plays a key role in enhancing the mechanical and chemical stability of the electrode microstructure. The impact of the addition of the Zn precursor on the microstructural evolution of the electrode during cycling is investigated at different scales (from cell/electrode to silicon particle scale) using complementary operando, in situ, and ex situ X‐ray tomography techniques. Comparative analyses conducted on the reference and with Zn electrode formulations using operando and in situ X‐ray micro‐tomography allow for monitoring of the electrode morphological deformations along with the crack pattern formation and evolution during cycling. The benefits of the precursor addition include enhancing the mechanical stability of the electrode through a strengthened microstructure more apt to maintaining its integrity, as well as a better anchoring to the current collector leading to decreased electrical disconnections and capacity fade. Moreover, complementary ex situ X‐ray nano‐tomography measurements highlight the benefits of the precursor addition in terms of chemical stability with mitigated solid electrolyte interface (SEI) formation over the electrode cycling.
In:
day:23
In:
month:09
In:
year:2024
In:
extent:18
In:
Advanced energy materials, Weinheim : Wiley-VCH, [2011]-, (23.09.2024) (gesamt 18), 1614-6840
Language:
English
DOI:
10.1002/aenm.202403741
URN:
urn:nbn:de:101:1-2409231425369.968673017424
URL:
https://doi.org/10.1002/aenm.202403741
URL:
https://nbn-resolving.org/urn:nbn:de:101:1-2409231425369.968673017424
URL:
https://d-nb.info/1342843711/34
URL:
https://doi.org/10.1002/aenm.202403741