Title:
LITHIUM IRON PHOSPHATE OF OLIVINE CRYSTAL STRUCTURE AND LITHIUM SECONDARY BATTERY USING SAME
Document Type and Number:
WIPO Patent Application WO/2011/132961
Kind Code:
A2
Abstract:
The present invention provides a lithium iron phosphate in which an olivine crystal structure is formed and carbon(C) is coated on a particle surface of the lithium iron phosphate, wherein when powder of said lithium iron phosphate has been dispersed in water for one hour and then a quantitative analysis has been performed for the lithium iron phosphate residual from which water was removed from a dispersed liquid, a weight ratio of a lithium iron phosphate generated after carbon has been peeled off was less than or equal to 0.005 wt% compared with the total weight of the lithium iron phosphate coated with the carbon. Since said lithium iron phosphate is coated with the carbon on the particle surface with a very small amount that leaches water, the invention is hardly separated during an electrode manufacturing step due to a uniform thin film coating effect on the particle surface of the lithium ion phosphate, and has excellent conductivity and superior density.
Inventors:
NOH, Hyun Kuk (209-405, Expo Apt.Jeonmin-dong, Yuseong-gu, Daejeon 305-761, 305-761, KR)
노현국 (대전광역시 유성구 전민동 엑스포아파트 209동 405호, 305-761 Daejeon, 305-761, KR)
PARK, Hong Kyu (3 Songrimmaeul Apt, Hagi-dong Yuseong-gu, Daejeon 305-759, 305-759, KR)
박홍규 (대전광역시 유성구 하기동 송림마을아파트 301동 1306호, 305-759 Daejeon, 305-759, KR)
PARK, Su-min (1 Hanmaeul Apt, Songgang-dong Yuseong-gu, Daejeon 305-756, 305-756, KR)
노현국 (대전광역시 유성구 전민동 엑스포아파트 209동 405호, 305-761 Daejeon, 305-761, KR)
PARK, Hong Kyu (3 Songrimmaeul Apt, Hagi-dong Yuseong-gu, Daejeon 305-759, 305-759, KR)
박홍규 (대전광역시 유성구 하기동 송림마을아파트 301동 1306호, 305-759 Daejeon, 305-759, KR)
PARK, Su-min (1 Hanmaeul Apt, Songgang-dong Yuseong-gu, Daejeon 305-756, 305-756, KR)
Application Number:
KR2011/002878
Publication Date:
October 27, 2011
Filing Date:
April 21, 2011
Export Citation:
Assignee:
LG CHEM, LTD. (20 Yoido-dong, Youngdungpo-gu, Seoul 150-721, 150-721, KR)
주식회사 엘지화학 (서울특별시 영등포구 여의도동 20번지, 150-721 Seoul, 150-721, KR)
NOH, Hyun Kuk (209-405, Expo Apt.Jeonmin-dong, Yuseong-gu, Daejeon 305-761, 305-761, KR)
노현국 (대전광역시 유성구 전민동 엑스포아파트 209동 405호, 305-761 Daejeon, 305-761, KR)
PARK, Hong Kyu (3 Songrimmaeul Apt, Hagi-dong Yuseong-gu, Daejeon 305-759, 305-759, KR)
박홍규 (대전광역시 유성구 하기동 송림마을아파트 301동 1306호, 305-759 Daejeon, 305-759, KR)
주식회사 엘지화학 (서울특별시 영등포구 여의도동 20번지, 150-721 Seoul, 150-721, KR)
NOH, Hyun Kuk (209-405, Expo Apt.Jeonmin-dong, Yuseong-gu, Daejeon 305-761, 305-761, KR)
노현국 (대전광역시 유성구 전민동 엑스포아파트 209동 405호, 305-761 Daejeon, 305-761, KR)
PARK, Hong Kyu (3 Songrimmaeul Apt, Hagi-dong Yuseong-gu, Daejeon 305-759, 305-759, KR)
박홍규 (대전광역시 유성구 하기동 송림마을아파트 301동 1306호, 305-759 Daejeon, 305-759, KR)
International Classes:
H01M4/525; B60L11/18; H01M4/583; H01M10/0525
Attorney, Agent or Firm:
SOHN, Chang Kyu (1403, Seongji Heights 2-cha Bldg.642-16, Yoksam 1-dong, Kangnam-gu, Seoul 135-910, 135-910, KR)
Claims: