Nonaqueous electrolyte comprising oxyanion and lithium...

H - Electricity – 01 – M

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Details

H01M 10/056 (2010.01) H01M 6/14 (2006.01) H01M 8/00 (2006.01) H01G 9/022 (2006.01)

Patent

CA 2583278

Disclosed is an electrolyte comprising: (a) an electrolyte salt; (b) a non- aqueous electrolyte solvent; and (c) a binary or multinary metal oxide salt. An electrochemical device comprising the same electrolyte is also disclosed. The metal oxide salt used in the electrolyte is dissolved in a non-aqueous solvent and generates oxyanions capable of improving corrosion resistance of metals. Therefore, the electrolyte prevents corrosion of metallic materials present in an electrochemical device, caused by extreme conditions, such as overcharge, overdischarge and high-temperature storage conditions, to which the device is exposed. Further, the electrolyte prevents degradation in the quality of an electrochemical device, caused by corrosion of metallic materials.

L'invention concerne un électrolyte comprenant: (a) un sel d'électrolyte; (b) un solvant d'électrolyte non aqueux; et (c) un sel d'oxyde métallique binaire ou multinaire. L'invention concerne un dispositif électrochimique comprenant cet électrolyte. Le sel d'oxyde métallique utilisé dans l'électrolyte est dissous dans un solvant non aqueux et génère des oxyanions permettant une résistance accrue à la corrosion des métaux. Par conséquent, cet électrolyte prévient la corrosion de matériaux métalliques présents dans un dispositif électrochimique exposé à des conditions extrêmes, notamment une surcharge, une décharge accélérée et des conditions de stockage à haute température. En outre, cet électrolyte empêche la dégradation de la qualité d'un dispositif électrochimique provoquée par la corrosion de matériaux métalliques.

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