Lithium energy storage device

Details Lithium energy storage device Lithium energy storage device

H - Electricity

01

M

H01M 10/26 (2006.01) H01M 10/24 (2006.01) H01M 10/36 (2010.01)

Patent

CA 2691846

A lithium energy storage device comprising at least one positive electrode, at least one negative electrode, and an ionic liquid electrolyte comprising bis(fluorosulfonyl)imide (FSI) as the anion and a cation counterion, and lithium ions at a level of greater than 0.3 mol/kg of ionic liquid, and not more than 1.5 mol/kg of ionic liquid. Also described is a lithium energy storage device comprising an FSI ionic liquid electrolyte and LiBF4 or LiPF6 as the lithium salt. Also described is a lithium energy storage device comprising an FSI ionic liquid electrolyte and a positive electrode comprising lithium metal phosphate, in which the metal is a first-row transition metal, or a doped derivate thereof.

L'invention concerne un dispositif de stockage d'énergie au lithium qui comprend au moins une électrode positive, au moins une électrode négative, et un électrolyte liquide ionique comprenant du bis(fluorosulfonyl)imide (FSI) en tant qu'anion et un contre-ion cationique, et des ions lithium en un niveau supérieur à 0,3 mole/kg de liquide ionique, et non supérieur à 1,5 mole/kg de liquide ionique. L'invention concerne aussi un dispositif de stockage d'énergie au lithium comprenant un électrolyte liquide ionique FSI et LiBF4 ou LiPF6 en tant que sel de lithium. L'invention concerne aussi un dispositif de stockage d'énergie au lithium comprenant un électrolyte liquide ionique FSI et une électrode positive comprenant du lithium métal phosphate, le métal étant un métal de transition de la première rangée, ou un dérivé dopé de celui-ci.

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