US 12,074,323 B2
Anode for lithium ion secondary battery, method for preparing the same and lithium ion secondary battery comprising the same
Sung Jun Park, Daejeon (KR); Byoung Wook Jo, Daejeon (KR); Byung Chan Kang, Daejeon (KR); and Yong Hee Kang, Daejeon (KR)
Assigned to SK On Co., Ltd., Seoul (KR)
Filed by SK On Co., Ltd., Seoul (KR)
Filed on Jan. 26, 2022, as Appl. No. 17/584,876.
Application 17/584,876 is a continuation of application No. 17/515,609, filed on Nov. 1, 2021.
Claims priority of application No. 10-2020-0144518 (KR), filed on Nov. 2, 2020.
Prior Publication US 2022/0149371 A1, May 12, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/583 (2010.01); H01M 4/04 (2006.01); H01M 4/133 (2010.01); H01M 4/134 (2010.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 10/0525 (2010.01); H01M 50/171 (2021.01); H01M 4/02 (2006.01)
CPC H01M 4/583 (2013.01) [H01M 4/0404 (2013.01); H01M 4/0435 (2013.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 10/0525 (2013.01); H01M 50/171 (2021.01); H01M 2004/021 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An anode for a lithium ion secondary battery, comprising:
an anode mixture layer including an anode active material and a binder on at least one surface of an anode current collector,
wherein pores inside the anode mixture layer have a Z-tensor value of 0.33 or more, and the anode active material of the anode mixture layer has an I(110)/I(002) value as determined by XRD of less than 0.50, and
wherein the Z-tensor value is measured by:
obtaining a three-dimensional structure inside the anode mixture layer using an X-ray microscope;
three-dimensional rendering of an image of the three-dimensional structure inside the anode mixture layer to convert into a three-dimensional image of the internal pore structure of the anode mixture layer; and
evaluating the three-dimensional structure for each pore in three axes of X, Y, and Z.