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Photopolymer Electrolytes for Sustainable, Upscalable, Safe, and Ambient‐Temperature Sodium‐Ion Secondary Batteries
Author(s) -
Bella Federico,
Colò Francesca,
Nair Jijeesh R.,
Gerbaldi Claudio
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201500873
Subject(s) - electrolyte , materials science , separator (oil production) , electrochemistry , chemical engineering , ionic conductivity , supercapacitor , thermogravimetric analysis , battery (electricity) , electrochemical window , energy storage , thermal stability , electrode , nanotechnology , chemistry , power (physics) , physics , quantum mechanics , engineering , thermodynamics
The first example of a photopolymerized electrolyte for a sodium‐ion battery is proposed herein. By means of a preparation process free of solvents, catalysts, purification steps, and separation steps, it is possible to obtain a three‐dimensional polymeric network capable of efficient sodium‐ion transport. The thermal properties of the resulting solid electrolyte separator, characterized by means of thermogravimetric and calorimetric techniques, are excellent for use in sustainable energy systems conceived for safe large‐scale grid storage. The photopolymerized electrolyte shows a wide electrochemical stability window up to 4.8 V versus Na/Na + along with the highest ionic conductivity (5.1 mS cm −1 at 20 °C) obtained in the field of Na‐ion polymer batteries so far and stable long‐term constant‐current charge/discharge cycling. Moreover, the polymeric networks are also demonstrated for the in situ fabrication of electrode/electrolyte composites with excellent interfacial properties, which are ideal for all‐solid‐state, safe, and easily upscalable device assembly.