Colossal Stability of SiB11(BO)12−: An Implication as Potential Electrolyte in High‐Voltage Alkali‐ion Battery

High‐voltage alkali metal‐ion batteries (AMIBs) require a non‐hazardous, low‐cost, and highly stable electrolyte with a large operating potential and rapid ion conductivity. Here, we have reported a halogen‐free high‐voltage electrolyte based on SiB11(BO)12−. Because of the weak π‐orbital interactio...

Full description

Saved in:
Bibliographic Details
Published in:Chemphyschem 2023-09, Vol.24 (18), p.e202300032-e202300032
Main Authors: Kushwaha, Anoop Kumar, Sushri Soumya Jena, Sahoo, Mihir Ranjan, Das, Debashish, Nayak, Saroj Kumar
Format: Article
Language:English
Subjects:
Electrolytes
High temperature
High voltages
Ionic interactions
Stability
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:High‐voltage alkali metal‐ion batteries (AMIBs) require a non‐hazardous, low‐cost, and highly stable electrolyte with a large operating potential and rapid ion conductivity. Here, we have reported a halogen‐free high‐voltage electrolyte based on SiB11(BO)12−. Because of the weak π‐orbital interaction of −BO as well as the mixed covalent and ionic interaction between SiB11‐cage and −BO ligand, SiB11(BO)12− has colossal stability. SiB11(BO)12− possesses extremely high vertical detachment energy (9.95 eV), anodic voltage limit (∼10.05 V), and electrochemical stability window (∼9.95 V). Furthermore, SiB11(BO)12− is thermodynamically stable at high temperatures, and its large size allows for faster cation movement. The alkali salts MSiB11(BO)12 (M=Li, Na, and K) are easily dissociated into ionic components. Electrolytes based on SiB11(BO)12− greatly outperform commercial electrolytes. In short, SiB11(BO)12−‐based compound is demonstrated to be a high‐voltage electrolyte for AMIBs.
ISSN:1439-4235
1439-7641
DOI:10.1002/cphc.202300032