Organic electrolyte and lithium secondary cell employing the sam

Details Organic electrolyte and lithium secondary cell employing the sam Organic electrolyte and lithium secondary cell employing the sam

1998-09-04

2000-09-12

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429306, 42923195, 252 622, H01M 1022

Patent

active

06117596&

ABSTRACT:
An organic electrolyte containing an organic solvent mixture and a lithium (Li) salt, and a lithium secondary cell adopting the electrolyte. The organic electrolyte contains the organic solvent mixture comprising a solvent having a high dielectric constant, a solvent having a low viscosity and a compound expressed by the following chemical formula (1): ##STR1## wherein R.sub.1 and R.sub.2 are independently C.sub.1 to C.sub.3 linear or cyclic alkyl, and x is an integer from 1 to 4. The organic electrolyte for a lithium secondary cell is improved in ion conductivity, low-temperature storage characteristics, and a wide potential window region. Also, the lithium salt may be a mixture of inorganic lithium salts and organic lithium salts. A lithium secondary cell adopting the electrolyte containing both inorganic lithium salts and organic lithium salts has a large capacity and stable charging/discharging characteristics, thereby improving high-temperature characteristics, self-discharging characteristics as well as life span characteristics.

REFERENCES:
patent: 5501921 (1996-03-01), Olsen
patent: 5928812 (1999-07-01), Xue
patent: 5965293 (1999-10-01), Idota et al.

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