US 11,682,765 B2
Electrode and electrochemical device including the same
Huixin Wang, Ningde (CN); Silin Huang, Ningde (CN); Sheng Cheng, Ningde (CN); and Hongming Yu, Ningde (CN)
Assigned to DONGGUAN POWERAMP TECHNOLOGY LIMITED, Dongguan (CN)
Filed by NINGDE AMPEREX TECHNOLOGY LIMITED, Ningde (CN)
Filed on Aug. 7, 2019, as Appl. No. 16/534,191.
Claims priority of application No. 201910251826.8 (CN), filed on Mar. 29, 2019.
Prior Publication US 2020/0313186 A1, Oct. 1, 2020
Int. Cl. H01M 4/587 (2010.01); H01M 4/525 (2010.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 4/38 (2006.01); H01M 4/02 (2006.01)
CPC H01M 4/587 (2013.01) [H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 4/525 (2013.01); H01M 4/625 (2013.01); H01M 2004/021 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A lithium secondary battery, comprising:
a partitioned cathode, the partitioned cathode comprising a cathode substrate having a first cathode region, a second cathode region and an uncoated region of the cathode substrate in sequence, wherein a surface of the cathode substrate is coated with a first cathode active material to form the first cathode region and coated with a second cathode active material different from the first cathode material to form the second cathode region;
a partitioned anode, the partitioned anode comprising an anode substrate having a first anode region, a second anode region and an uncoated region of the anode substrate in sequence, wherein a surface of the anode substrate is coated with a first anode active material to form the first anode region and coated with a second anode active material different from the first anode material to form the second anode region, a thickness of the second anode region being less than a thickness of the first anode region,
wherein a value C1 comprises a ratio of a direct current resistance value RA1 of the first anode region to a direct current resistance value RC1 of the first cathode region;
wherein a value C2 comprises a ratio of a direct current resistance value RA2 of the second anode region to a direct current resistance value RC2 of the second cathode region; and
wherein C2<C1.