New concept for polymer electrolyte: Dual-phase polymer electrolyte

✍ Scribed by Toshihiro Ichino; Morihiko Matsumoto; Yukitoshi Takeshita; J.Steven Rutt; Shiro Nishi

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 358 KB
• Volume: 40
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(95)00174-d

✦ Synopsis

Two types of dual-phase polymer electrolytes (DPE), mixed latex DPE and core-shell latex DPE, were fabricated from styrene-butadiene rubber (SBR) and acrylonitrile-butadiene rubber (NBR) latex mixture, and from polybutadiene (PB)/ poly (vinyl pyrrohdone) (PVP) core-shell latex. Polar phases of films made from these latices were selectively impregnated with lithium salt solution, constituting dual-phase structures. TEM images verified the dual-phase structures. The ionic conductivity vs. NBR conductive-phase content relationship showed a profile characteristic of percolation effect, which also endorsed the dual-phase structure of mixed latex DPE. For both types of DPEs, ionic conductivity on the order of 10-3S/cm was obtained. However, the PVP conductive phase of the core-shell latex DPE was partially leached out in the preparation process. The modulus of mixed latex DPE was 6 x lOedyn/ cm' at room temperature, even with a lithium salt solution content of 61 wt%, suggesting that the SBR supporting phase is little affected by the lithium salt solution.