Patent number: 6974601
Abstract: Disclosed is a positive active material for a rechargeable lithium battery. The positive active material includes at least one compound represented by formulas 1 to 4: LixNi1-yMnyF2??(1) LixNi1-yMnyS2??(2) LixNi1-y-zMnyMzO2-aFa??(3) LixNi1-y-zMnyMzO2-aSa??(4) where M is selected from the group consisting of Co, Mg, Fe, Sr, Ti, B, Si, Ga, Al, Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No and Lr, 0.95?x?1.1, 0<y?0.99, 0?z?0.5, and 0?a?0.5; and a metal oxide or composite metal oxide layer formed on the compound.
Type:
Grant
Filed:
March 23, 2004
Date of Patent:
December 13, 2005
Assignee:
Samsung SDI Co., Ltd.
Inventors:
Ho-Jin Kweon, Hyun-Sook Jung, Yong-Chul Park, Geun-Bae Kim
Publication number: 20050202316
Abstract: Disclosed is a lithium secondary battery including a positive electrode comprising a combination of positive active materials. The combination includes a material represented by one or both of Formulae 1 and 2; and a material of Formula 3 as follows: LiaNibMncMdO2 ??(Formula 1) where 0.90?a?1.2; 0.5?b?0.9; 0<c<0.4; 0?d?0.2; LiaNibCocMndMeO2 ??(Formula 2) where 0.90?a?1.2, 0.5?b?0.9, 0<c<0.4, 0<d<0.4, and 0?e?0.2; LiaCoMbO2 ??(Formula 3) where 0.90?a?1.2 and 0?b?0.2; and each M of Formulae 1-3 is independently selected from the group consisting of Mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Ru, Os, Hs, Rh, Ir, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, In, Tl, Si, Ge, Sn, P, As, Sb, Bi, S, Se, Te, Po, and combinations.
Type:
Application
Filed:
March 11, 2005
Publication date:
September 15, 2005
Inventors:
Duck-Chul Hwang, Geun-Bae Kim, Yong-Chul Park, Won-Il Jung, Jun-Won Suh, Jan-Dee Kim