US 12,407,017 B2
Lithium secondary battery comprising inorganic electrolyte solution
Seung-Hyun Chung, Daejeon (KR); Jeong-Gil Kim, Daejeon (KR); Bum-Young Jung, Daejeon (KR); Han-Su Kim, Seoul (KR); A-Young Kim, Seoul (KR); Ju-Hye Song, Seoul (KR); and Ho-Jae Jung, Seoul (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR); and IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY), Seoul (KR)
Appl. No. 17/043,951
Filed by LG CHEM, LTD., Seoul (KR); and IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY), Seoul (KR)
PCT Filed Jul. 12, 2019, PCT No. PCT/KR2019/008670
§ 371(c)(1), (2) Date Sep. 30, 2020,
PCT Pub. No. WO2020/013667, PCT Pub. Date Jan. 16, 2020.
Claims priority of application No. 10-2018-0081308 (KR), filed on Jul. 12, 2018.
Prior Publication US 2021/0098826 A1, Apr. 1, 2021
Int. Cl. H01M 10/056 (2010.01); H01M 4/36 (2006.01); H01M 4/48 (2010.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01); H01M 10/0563 (2010.01); H01M 50/409 (2021.01); H01M 50/437 (2021.01); H01M 50/44 (2021.01); H01M 4/02 (2006.01)
CPC H01M 10/0563 (2013.01) [H01M 4/366 (2013.01); H01M 4/48 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 50/409 (2021.01); H01M 50/437 (2021.01); H01M 50/44 (2021.01); H01M 2004/027 (2013.01); H01M 2300/002 (2013.01)] 9 Claims
 
1. A lithium secondary battery, comprising:
a positive electrode;
a negative electrode;
a separator interposed between the positive electrode and the negative electrode; and
a sulfur dioxide-based inorganic electrolyte solution,
wherein the negative electrode comprises a negative electrode active material, which comprises a carbon material having a coating comprising titanium oxide, wherein the titanium oxide comprises a mixture of TiO, TiO0.5, TiO0.68 and TiO1.3,
wherein the positive electrode comprises active material particles of Li, LiCoO2, LiNiO2, LiMn2O4, LiCoPO4, LiFePO4, LiNi1-x-y-zCoxM1yM2xO2 (M1 and M2 are independently Al, Ni, Co, Fe, Mn, V, Cr, Ti, W, Ta, Mg, Mo or two or more of them, and x, y and z are independently atomic fractions of elements in the oxide composition, where 0≤x≤0.5, 0≤y<0.5, 0≤z<0.5, 0≤x+y+z<1) or two or more of them,
wherein the separator comprises glass fibers, and
wherein the carbon material is obtained by:
dispersing a titanium oxide precursor in a solvent to prepare a sol solution,
thereafter reacting the sol solution and a carbon material to induce a sol-gel reaction, and
performing a thermal treatment.