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