Title:
METHOD FOR MANUFACTURING ANODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, ANODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY MANUFACTURED THEREBY AND LITHIUM SECONDARY BATTERY USING SAME
Document Type and Number:
WIPO Patent Application WO/2012/011785
Kind Code:
A2
Abstract:
The present invention provides a method for manufacturing anode active material for a lithium secondary battery and anode active material for a lithium secondary battery manufactured thereby, comprising the following steps: a) simultaneously mixing in a reactor a first metallic salt aqueous solution including nickel, cobalt, manganese, and selectively a transition metal, a chelating agent, and a basic aqueous solution, and mixing and firing with a lithium raw material for manufacturing a core portion including the compound of Chemical Formula 1 below [Chemical Formula 1] Lix1[Ni1-y1-z1-w1Coy1Mnz1Mw1]O2 (where, in the above formula, 0.9≤x1≤1.3, 0.1≤y1≤0.3, 0.0≤z1≤0.3, 0≤w1≤0.1, and M is at least one metal selected from Mg, Zn, Ca, Sr, Cu, Zr, P, Fe, Al, Ga, In, Cr, Ge, and Sn); b) simultaneously mixing in a reactor a second metallic salt aqueous solution including nickel, cobalt, manganese, and selectively a transition metal, the chelating agent, and the basic aqueous solution, mixing and firing with the lithium raw material, and grinding same for manufacturing a compound for forming an exterior portion including the compound of Chemical Formula 2 below [Chemical Formula 2] Lix2[Ni1-y2-z2-w2Coy2Mnz2Mw2]O2 (where, in the above formula, 0.9≤x2≤1+z2, 0≤y2≤0.33, 0≤z2≤0.5, 0≤w2≤0.1 and M is at least one metal selected from Mg, Zn, Ca, Sr, Cu, Zr, P, Fe, Al, Ga, In, Cr, Ge, and Sn); c) mixing the core portion manufactured from step a) and the compound for forming the exterior portion manufactured from step b); and heat-treating the compound prepared from step c) at 500-800℃ for forming a double layer structure in which lithium is present at a continuous density gradient from the contacting border surface of the core portion and the exterior portion to the surface portion of the exterior portion.
Inventors:
KIM, Jik Soo (503-306 Daewon Kantaville Apt, Gak-ri Ochang-eup, Cheongwon-gun, Chungcheongbuk-do 363-788, 363-788, KR)
김직수 (충청북도 청원군 오창읍 각리 대원칸타빌아파트 503동 306호, 363-788 Chungcheongbuk-do, 363-788, KR)
CHOI, Moon Ho (2 Jungang Heights Apt, 637-6 Gak-ri Ochang-eup, Cheongwon-gun, Chungcheongbuk-do 363-883, 363-883, KR)
최문호 (충청북도 청원군 오창읍 각리 637-6 중앙하이츠아파트, 363-883 Chungcheongbuk-do, 363-883, KR)
김직수 (충청북도 청원군 오창읍 각리 대원칸타빌아파트 503동 306호, 363-788 Chungcheongbuk-do, 363-788, KR)
CHOI, Moon Ho (2 Jungang Heights Apt, 637-6 Gak-ri Ochang-eup, Cheongwon-gun, Chungcheongbuk-do 363-883, 363-883, KR)
최문호 (충청북도 청원군 오창읍 각리 637-6 중앙하이츠아파트, 363-883 Chungcheongbuk-do, 363-883, KR)
Application Number:
KR2011/005445
Publication Date:
January 26, 2012
Filing Date:
July 22, 2011
Export Citation:
Assignee:
ECOPRO CO. LTD. (316-3, SongdaeriOchang-eup, Cheongwon-gun, Chungcheongbuk-do 363-883, 363-883, KR)
주식회사 에코프로 (충청북도 청원군 오창읍 송대리 316-3, 363-883 Chungcheongbuk-do, 363-883, KR)
KIM, Jik Soo (503-306 Daewon Kantaville Apt, Gak-ri Ochang-eup, Cheongwon-gun, Chungcheongbuk-do 363-788, 363-788, KR)
김직수 (충청북도 청원군 오창읍 각리 대원칸타빌아파트 503동 306호, 363-788 Chungcheongbuk-do, 363-788, KR)
CHOI, Moon Ho (2 Jungang Heights Apt, 637-6 Gak-ri Ochang-eup, Cheongwon-gun, Chungcheongbuk-do 363-883, 363-883, KR)
주식회사 에코프로 (충청북도 청원군 오창읍 송대리 316-3, 363-883 Chungcheongbuk-do, 363-883, KR)
KIM, Jik Soo (503-306 Daewon Kantaville Apt, Gak-ri Ochang-eup, Cheongwon-gun, Chungcheongbuk-do 363-788, 363-788, KR)
김직수 (충청북도 청원군 오창읍 각리 대원칸타빌아파트 503동 306호, 363-788 Chungcheongbuk-do, 363-788, KR)
CHOI, Moon Ho (2 Jungang Heights Apt, 637-6 Gak-ri Ochang-eup, Cheongwon-gun, Chungcheongbuk-do 363-883, 363-883, KR)
International Classes:
H01M4/525; H01M4/131; H01M4/505; H01M10/0525
Attorney, Agent or Firm:
KIM, Tae Sun (#203, 2F HyangsanBldg,142-1 Nonhyeon-dong, Gangnam-gu, Seoul 135-822, 135-822, KR)
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