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

fYear

1990

fDate

25-28 Jun 1990

Firstpage

81

Lastpage

83

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Sources Symposium, 1990., Proceedings of the 34th International

Conference_Location

Cherry Hill, NJ

Print_ISBN

0-87942-604-7

Type

conf

DOI

10.1109/IPSS.1990.145796

Filename

145796