	US 11,710,817 B2
	Method for designing electrode for lithium secondary battery and method for manufacturing electrode for lithium secondary battery comprising the same
Ji Hye Park, Daejeon (KR); Song Taek Oh, Daejeon (KR); and Jeong Gil Kim, Daejeon (KR)
Assigned to LG Energy Solution, Ltd.
Appl. No. 16/633,820
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Sep. 18, 2018, PCT No. PCT/KR2018/011008 § 371(c)(1), (2) Date Jan. 24, 2020, PCT Pub. No. WO2019/059619, PCT Pub. Date Mar. 28, 2019.
Claims priority of application No. 10-2017-0120604 (KR), filed on Sep. 19, 2017.
Prior Publication US 2021/0036307 A1, Feb. 4, 2021
Int. Cl. H01M 4/139 (2010.01); H01M 4/62 (2006.01); H01M 10/42 (2006.01); H01M 4/1391 (2010.01); H01M 10/052 (2010.01); H01M 10/48 (2006.01); H01M 4/02 (2006.01)

CPC H01M 4/139 (2013.01) [H01M 4/1391 (2013.01); H01M 4/624 (2013.01); H01M 10/052 (2013.01); H01M 10/4285 (2013.01); H01M 10/48 (2013.01); H01M 2004/028 (2013.01)]

6 Claims

1. A method for designing an electrode for a lithium secondary battery, the method comprising:

(1) manufacturing a plurality of electrodes each containing an active material, a binder, and a conductive agent, and having a different content of the conductive agent from each other;

(2) applying an alternating current to each of the plurality of electrodes manufactured above while changing a frequency and using a broadband dielectric spectrometer (BDS) to measure conductivity of each of the electrodes;

(3) identifying a specific frequency (Fc) at a point at which the conductivity of each of the electrodes changes from a DC conductivity to an AC conductivity; and

(4) comparing the specific frequency (Fc) and a preset reference frequency (Fr) of 10⁷Hz to determine a deviation between the preset reference frequency (Fr) and the specific frequency (Fc), and determining a content of the conductive agent contained in an electrode is appropriate when the deviation is within a reference deviation of 3×10⁶Hz.