Rational Formulation of Ether‐Lactone Electrolytes for Safe and Sustainable Ni‐Rich Lithium‐Ion Batteries
Juan Luis Gomez-Urbano·Andrea Balducci·Endy Nugroho Dwiputra·Thomas Diemant·Dominic Bresser·Adriano Pierini·Andrea Cioffi·Enrico Bodo·Sergio Brutti·Matjaž Koželj·Tom Gouveia·Emma Bremond·Alix Ladam·Sébastien Fantini·Susan Sananes‐Israel·Imanol Landa‐Medrano·Iratxe de Meatza·Markus Binder
This study reports the formulation of innovative electrolytes designed to improve safety, sustainability, and compatibility with LiNi<sub>0.92</sub>Mn<sub>0.04</sub>Co<sub>0.04</sub>O<sub>2</sub> (NMC92) cathodes. The use of bio-based solvents (γ-valerolactone, GVL) and safe, stable, innovative co-solvents (diethylene glycol butyl ethyl ether, DEGBEE) is investigated in combination with imide- and borate-based salts, demonstrating reduced flammability and enhanced transport properties. Molecular