Patent number: 9070941
Abstract: [Object] The object is to provide a negative electrode material for a lithium secondary battery, wherein a sulfide-based negative electrode with water-resistant properties can exert excellent cycle characteristics and high output performance while maintaining a high discharge capacity and there is no precipitation of lithium dendrites during charge at low temperature. [Means for Solving Problems] A negative electrode material for a lithium secondary battery comprising sulfur and sulfide glass including the following components (i) and (ii): (i) at least one or more elements selected from a group consisting of Sb, As, Bi, Ge, Si, Cu, Zn, Pd, In and Zr; and (ii) at least one or more elements selected from a group consisting of Se, Te, Ga, Sn, Pb, Cd, Al, Fe, Mg, Ca, Co, Ag, Sr, P and Ba, wherein the ratio of the above components is sulfur: 40-80 mol %, (i): 1-50 mol % and (ii): 1-50 mol %, respectively.
Type:
Grant
Filed:
December 9, 2011
Date of Patent:
June 30, 2015
Assignees:
National Institute of Advanced Industrial Science and Technology, Isuzu Glass Company, Ltd.
Inventors:
Takashi Mukai, Taichi Sakamoto, Tetsuo Sakai, Kunihiko Tani, Naoto Yamashita, Koichiro Ikeda
Patent number: 8945779
Abstract: A main object of the present invention is to provide a solid electrolyte material having excellent Li ion conductivity. To attain the object, the present invention provides a solid electrolyte material represented by a general formula: Lix(La1-aM1a)y(Ti1-bM2b)zO?, characterized in that “x”, “y”, and “z” satisfy relations of x+y+z=1, 0.652?x/(x+y+z)?0.753, and 0.167?y/(y+z)?0.232; “a” is 0?a?1; “b” is 0?b?1; “?” is 0.8???1.2; “M1” is at least one selected from the group consisting of Sr, Na, Nd, Pr, Sm, Gd, Dy, Y, Eu, Tb, and Ba; and “M2” is at least one selected from the group consisting of Mg, W, Mn, Al, Ge, Ru, Nb, Ta, Co, Zr, Hf, Fe, Cr, and Ga.
Type:
Grant
Filed:
April 13, 2010
Date of Patent:
February 3, 2015
Assignee:
Toyota Jidosha Kabushiki Kaisha
Inventors:
Chihiro Yada, Hiroshi Suyama, Shoji Yokoishi, Brian Elliott Hayden, Thierry Le Gall, Duncan Clifford Alan Smith, Christopher Edward Lee