Inventors

Hicham Ben Youcef (CIC energiGUNE), Michel Armand (CIC energiGUNE), Brahim Orayech (CIC energiGUNE), Damien Saurel (CIC energiGUNE), Devaraj Shanmukaraj (CIC energiGUNE) and Teófilo Rojo (CIC energiGUNE).

Abstract

Researchers at CIC energiGUNE have developed a method for preparing a solid polymer electrolyte with single ion-conducting properties based on modified cellulose for Li and Na batteries.

The resulting electrolyte is greener, safer, and more cost-effective. It allows the use of green, cellulose-based composite materials to improve the single ion-conducting properties, ionic conductivity, and mechanical properties of the resulting solid polymer electrolyte. Besides, this increases the cost-effectiveness of the electrolyte, since it avoids the need for adding any expensive lithium/sodium-based salts to the polymer electrolyte. Another characteristic of the invention is the non-use of any liquid plasticizer hence improving the safety aspect associated with the use of liquid electrolytes.

Added value

• Greener: Abundant natural material.
• Safer: Higher electrochemical stability >4.3V (and excellent mechanical stability).
• More efficient: Single-ion conducting properties (TNa+ =0.6) and design flexibility.

Application of the technology

• Lithium or sodium secondary batteries.