Concept of polymer alloy electrolytes: towards room temperature operation of lithium–polymer batteries

• Published in: Electrochimica acta 2004-11, Vol.50 (2), p.243-246
• Main Authors: Noda, Kazuhiro, Yasuda, Toshikazu, Nishi, Yoshio
• Format: Article
• Language: English
• Subjects: Applied sciences; Chemistry; Corrosion; Corrosion mechanisms; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrochemistry; Exact sciences and technology; General and physical chemistry; Ionic conductivity; Lithium–polymer batteries; Metals. Metallurgy; Polymer alloy electrolytes
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2004.03.047

Polymer alloy technique is very powerful tool to tune the ionic conductivity and mechanical strength of polymer electrolyte. A semi-interpenetrating polymer network (semi-IPN) polymer alloy electrolyte, composed of non-cross-linkable siloxane-based polymer and cross-linked 3D network polymer, was prepared. Such polymer alloy electrolyte has quite high ionic conductivity (more than 10 −4 S cm −1 at 25 °C and 10 −5 S cm −1 at −10 °C) and mechanical strength as a separator film with a wide electrochemical stability window. A lithium metal/semi-IPN polymer alloy solid state electrolyte/LiCoO 2 cell demonstrated promising cycle performance with room temperature operation of the energy density of 300 Wh/L and better rate performance than conventional PEO based lithium polymer battery ever reported.