US 11,894,524 B2
Positive electrode plate, and electrochemical apparatus and device associated therewith
Yang Yu, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Jan. 31, 2022, as Appl. No. 17/589,705.
Application 17/589,705 is a continuation of application No. PCT/CN2020/106467, filed on Jul. 31, 2020.
Claims priority of application No. 201910731214.9 (CN), filed on Aug. 8, 2019.
Prior Publication US 2022/0158257 A1, May 19, 2022
Int. Cl. H01M 10/42 (2006.01); H01M 4/13 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 10/4235 (2013.01) [H01M 4/13 (2013.01); H01M 10/0525 (2013.01); H01M 2004/028 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A positive electrode plate, comprising:
a positive electrode current collector,
a positive electrode active material layer disposed on at least one surface of the positive electrode current collector, and
a safety layer disposed between the positive electrode current collector and the positive electrode active material layer;
wherein:
the safety layer comprises a binding substance, a conductive substance, and a special sensitive substance; and
the special sensitive substance comprises at least one product of esterification of polysaccharide, wherein a weight-average molecular weight Mw of the special sensitive substance is from 1000 to 28000, wherein a single-sided capacity per unit area of the positive electrode plate is ≤4.1 mAh/cm2, and
wherein a degree of esterification of monosaccharide units in the product of esterification of polysaccharide is 50% to 98%.