US 11,901,560 B2
Negative electrode plate, preparation method thereof and electrochemical device
Cheng Li, Ningde (CN); Changliang Sheng, Ningde (CN); Huafeng Huang, Ningde (CN); and Qisen Huang, Ningde (CN)
Assigned to Contemporary Amperex Technology Co., Limited, Ningde (CN)
Filed by Contemporary Amperex Technology Co., Limited, Ningde (CN)
Filed on Oct. 12, 2022, as Appl. No. 17/964,074.
Application 17/964,074 is a continuation of application No. 16/452,542, filed on Jun. 26, 2019, granted, now 11,522,194.
Claims priority of application No. 201810712609.X (CN), filed on Jun. 29, 2018.
Prior Publication US 2023/0071180 A1, Mar. 9, 2023
Int. Cl. H01M 4/62 (2006.01); C23C 14/00 (2006.01); C23C 14/08 (2006.01); C23C 14/30 (2006.01); H01M 4/04 (2006.01); H01M 4/133 (2010.01); H01M 4/1393 (2010.01); H01M 4/587 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/628 (2013.01) [C23C 14/0021 (2013.01); C23C 14/081 (2013.01); C23C 14/30 (2013.01); H01M 4/0404 (2013.01); H01M 4/0423 (2013.01); H01M 4/133 (2013.01); H01M 4/1393 (2013.01); H01M 4/587 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A negative electrode plate, comprising:
a negative current collector;
a negative active material layer, disposed on at least one surface of the negative current collector, said negative active material layer comprises opposite first surface and second surface, wherein said first surface is disposed away from the negative current collector, wherein the negative active material is artificial graphite; and
an inorganic dielectric layer, disposed on the first surface of the negative active material layer, said inorganic dielectric layer consisting of an inorganic dielectric material and wherein the inorganic dielectric material is alumina; said inorganic dielectric layer comprises a first dielectric layer on an outer surface of the negative active material layer, and the first dielectric layer has a thickness of from 100 nm to 200 nm and a continuous layered structure;
wherein the negative electrode plate has a compact density of from 1.2 g/cm3 to 2.0 g/cm3, a porosity of from 25% to 45% and a wetting velocity of electrolyte on per 10 cm×10 cm area of from 2 μg/s to 2.2 μg/s.