Title :
Solid-state rechargeable lithium batteries utilizing polyphosphazene-based polymer electrolytes
Author :
Abraham, K.M. ; Alamgir, M. ; Moulton, R.D.
Author_Institution :
EIC Labs. Inc., Norwood, MA, USA
Abstract :
The dimensional stability of poly[bis-(methoxyethoxyethoxide)phosphazene], or MEEP-based polymer electrolytes has been augmented either by immobilizing them in a porous separator matrix or forming composites with poly(ethylene oxide) (PEO), poly(vinyl pyrrolidone) (PVP), or poly(tetraethylene glycol) diacrylate (PEGDA). Increased dimensional stability in MEEP-(LiX)n has also been achieved for LiX=LiAlCl4. Solid-state Li/TiS2 cells utilizing dimensionally stabilized MEEP-electrolytes have been fabricated and cycled. These cells can be discharged at room temperature at the C/20 rate with a cathode utilization of more than 0.15 mAh/cm2 and at 50°C with a cathode utilization greater than 0.50 mAh/cm2. The coulombic efficiency during cycling was between 95 and 100%, indicating good reversibility for Li cycling in these electrolytes
Keywords :
electrochemical electrodes; lithium; polymers; secondary cells; superionic conducting materials; testing; titanium compounds; 50 degC; 95 to 100 percent; Li-TiS2; LiAlCl4; cathode; coulombic efficiency; cycling; dimensional stability; poly(ethylene oxide); poly(tetraethylene glycol) diacrylate; poly(vinyl pyrrolidone); poly[bis-(methoxyethoxyethoxide)phosphazene]; polymer electrolytes; porous separator matrix; rechargeable; reversibility; secondary cells; testing; Batteries; Cathodes; Conductivity; Laboratories; Lithium; Mechanical factors; Polymers; Solid state circuits; Stability; Temperature;
Conference_Titel :
Power Sources Symposium, 1990., Proceedings of the 34th International
Conference_Location :
Cherry Hill, NJ
Print_ISBN :
0-87942-604-7
DOI :
10.1109/IPSS.1990.145796
