US 11,913,782 B2
Method and device for evaluating dispersion of binder in electrode mixture layer
Ji Hye Park, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/634,409
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Nov. 19, 2020, PCT No. PCT/KR2020/016370
§ 371(c)(1), (2) Date Feb. 10, 2022,
PCT Pub. No. WO2021/118100, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 10-2019-0162497 (KR), filed on Dec. 9, 2019.
Prior Publication US 2022/0316853 A1, Oct. 6, 2022
Int. Cl. G01B 7/06 (2006.01); H01M 4/62 (2006.01)
CPC G01B 7/06 (2013.01) [H01M 4/621 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for evaluating dispersibility of a binder in thickness direction in an electrode mixture layer, comprising:
setting an arbitrary reference point (no) on a surface of the electrode mixture layer in a state where current is applied to the electrode mixture layer, and measuring a potential difference (V) with the set reference point (no) at n points each having different separation distances from the set reference point (no) where n is an integer greater than or equal to 2;
setting any one potential difference among the measured potential differences as a reference voltage and calculating a voltage difference (ΔV) from the reference voltage; and
comparing the calculated voltage difference (ΔV) with a preset reference value, and calculating a dispersion in a thickness direction of a binder in the electrode mixture layer.