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Patent Searching and Data


Title:
METHOD FOR EVALUATING SECONDARY BATTERY ACTIVE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2017/195979
Kind Code:
A1
Abstract:
Provided is a method for evaluating a secondary battery active material, comprising: preparing an active material including a core and a shell located on the surface of the core; forming an active material layer including the active material on at least one surface of a current collector; acquiring a Raman spectrum for the active material and calculating a Raman R value (ID/IG) therefrom; obtaining a frequency distribution chart for the Raman R value; obtaining a probability density function by normalizing the frequency distribution chart; and evaluating the shell of the active material by extracting a Raman R value (ID/IG) and/or a predetermined width indicating a maximum value from the graph of the probability density function.

Inventors:
LEE, Suk-Chin (SK Innovation Global Technology, 325 Expo-ro,Yuseong-gu, Daejeon, 34124, KR)
KIM, Hyo-Sang (SK Innovation Global Technology, 325 Expo-ro,Yuseong-gu, Daejeon, 34124, KR)
YUN, Jung-Hyun (SK Innovation Global Technology, 325 Expo-ro,Yuseong-gu, Daejeon, 34124, KR)
Application Number:
KR2017/003260
Publication Date:
November 16, 2017
Filing Date:
March 27, 2017
Export Citation:
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Assignee:
SK INNOVATION CO., LTD. (26 Jong-ro, Jongno-gu, Seoul, 03188, KR)
International Classes:
G01J3/44; G01J3/42; H01M4/36; H01M4/587
Attorney, Agent or Firm:
DAE-A INTELLECTUAL PROPERTY CONSULTING (3F Hanyang Bldg, 123 Yeoksam-roGangnam-gu, Seoul, 06243, KR)
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