| 摘要 |
An electrode material, preferably a positive electrode material, for a lithium-ion battery, to the method of preparing same, and to a lithium-ion battery incorporating said electrode material. This composite electrode material includes: an electronically conductive additive, such as carbon; an active material that is an oxide, a phosphate, a fluorophosphate or a silicate of lithium; a polymer binder such as PVDF; and an organic salt corresponding to defined chemical formulae, for example LiPDI, LiTDI, LiPDCI, LiDCTA, LiFSI, LiTFSI, optionally as a mixture. The organic salt makes it possible to increase the ionic conductivity of the electrode. |
| 主权项 |
1. A battery electrode composite material, comprising:
a) at least one electron-conducting additive at a content ranging from 1 to 5% by weight with respect to the total weight of the composite material; b) a lithium oxide, phosphate, fluorophosphate or silicate as electrode active material capable of reversibly forming an insertion compound with lithium, having an electrochemical potential greater than 2V with respect to the Li/Li+ pair; c) a polymer binder, d) at least one organic salt of formula A and/or B: with —Xi— in the formula A independently representing the following groups or atoms: —N═, —N−—, —C(R)═, —C−(R)—, —O—, —S(═O)(R)═ or —S(R)═ with R representing a group from the group consisting of F, CN, NO2, S—CN, N═C═S, —OCnHmFp and —CnHmFp with n, m and p integers; Rf in the formula B representing F, CF3, CHF2, CH2F, C2HF4, C2H2F4, C2H3F2, C2F5, C3F6, C3H2F5, C3H4F3, C4F9, C4H2F7, C4H4F5, C5F11, C3F5OCF3, C2F4OCF3, C2H2F2OCF3 or CF2OCF3 and Z representing an electron-withdrawing group chosen from F, CN, SO2Rf, CO2Rf or CORf, and M+ representing a lithium, sodium, quaternary or imidazolium cation. |
