Ion-conducting lithium bis(oxalato)borate-based polymer electrolytes

0341466 - ÚACH 2010 RIV CH eng J - Journal Article
Reiter, Jakub - Dominko, R. - Nádherná, Martina - Jakubec, Ivo
Ion-conducting lithium bis(oxalato)borate-based polymer electrolytes.
Journal of Power Sources. Roč. 189, č. 1 (2009), s. 133-138. ISSN 0378-7753. E-ISSN 1873-2755
R&D Projects: GA MŠMT LC523; GA AV ČR KJB400320701
Institutional research plan: CEZ:AV0Z40320502
Keywords : polymer electrolyte * 2-ethoxyethyl methacrylate * lithium-ion battery
Subject RIV: CG - Electrochemistry
Impact factor: 3.792, year: 2009

Poly(2-ethoxyethyl methacrylate) polymer gel electrolytes containing immobilised lithium bis(oxalato)borate in aprotic carbonates: propylene carbonate (PC), propylene carbonate-ethylene carbonate (PC-EC 50:50 vol.%) and diethyl carbonate-ethylene carbonate (DEC-EC 50:50 vol.%) were prepared by a direct radical polymerisation. The electrolyte composition was optimised to achieve suitable ionic conductivity 0.5 and 2.4 mS cm(-1) at 25 and 70 degrees C respectively along with good mechanical properties. The electrochemical stability up to 5.1 V vs. Li/Li+ was determined on gold electrode by voltammetrical measurements. The polymer electrolytes with high-boiling solvents (PC and PC/EC) showed higher thermal stability (up to 110-120 degrees C) compared to the liquid electrolytes. The proposed area of application is in the lithium-ion batteries with cathodes operating at elevated temperatures of 70 degrees C, where higher electrochemical stability of the polymer electrolytes is employed.
Permanent Link: http://hdl.handle.net/11104/0184450