Non-aqueous electrolytic solution
AssigneeFerro Corporation
InventorsWu Xu, Zhongyi Deng, Pascal Bolomey
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Abstract
The use of lithium bis(oxalate)borate (LiBOB) as an additive in a lithium secondary battery provides improved battery performance such as long life and high capacity retention after high temperature storage.
Claims20
A secondary battery comprising an anode, a cathode, and an electrolytic solution, wherein the electrolytic solution comprises a non-aqueous solvent, a solute, and a salt additive, the salt additive comprising lithium bis(oxalato)borate provided that the concentration of lithium bis(oxalato)borate in the solution does not exceed 0.15 M, wherein
- the anode comprises
- a first material selected from the group consisting of crystalline carbon, lithium metal, LiMnO2, LiAl, LiZn, Li3Bi, Li3Cd, Li3Sb, Li4Si, Li4.4Pb, Li4.4Sn, LiC6, Li3FeN2, Li2.6Co0.4N, Li2.6Cu0.4N, Li4Ti5O12, and combinations thereof, and
- a second material selected from the group consisting of SnO, SnO2, GeO, GeO2, In2O, In2O3, PbO, PbO2, Pb2O3, Pb3O4, Ag2O, AgO, Ag2O3, Sb2O3, Sb2O4, Sb2O5, SiO, ZnO, CoO, NiO, FeO, and combinations thereof.
A secondary battery comprising an electrolytic solution, wherein the electrolytic solution comprises a non-aqueous solvent, a solute, and a salt additive, the salt additive comprising lithium bis(oxalato)borate provided that the concentration of lithium bis(oxalato)borate in the solution does not exceed about 0.10 M, wherein the non-aqueous solvent comprises about 1-50 wt % ethylene carbonate, about 1-50 wt % propylene carbonate and about 1-80 wt % diethyl carbonate.
A non-aqueous electrolytic solution for use in a secondary battery comprising a first salt, lithium bis(oxalato)borate, provided that lithium bis(oxalato)borate is present at a concentration not exceeding 0.15 M, and a solvent comprising about 1-50 wt % ethylene carbonate, about 1-50 wt % propylene carbonate and about 1-80 wt % diethyl carbonate.
Dependencies are inferred from the claim text.