Patent ID: 8124282
Filing Date: 2012-02-28
Classification: H01M,Y02E

Abstract:
1. A nonaqueous electrolyte having maleimide additives, employed in rechargeable cells, comprising: an alkali metal compound; a nonaqueous solvent; and a maleimide additive, wherein the maleimide additive comprises bismaleimide oligomer, mixture of maleimide monomer and bismaleimide oligomer, mixture of bismaleimide monomer and bismaleimide oligomer, or mixture of maleimide monomer, bismaleimide monomer, and bismaleimide oligomer, wherein the bismaleimide oligomer is prepared by reaction of barbituric acid and a bismaleimide monomer, wherein the bismaleimide oligomer has a hyper branched architecture, wherein the branch architecture is [(bismaleimide monomer)-(barbituric acid)x]m, and x is between 0.5-2.5 and m (repeating unit) is between 2-10.