US 12,176,574 B2
Porous carrier and electrochemical device separator
Hideya Yoshitake, Kaohsiung (TW); Wei-Min Chang, Kaohsiung (TW); Li-Jane Her, Kaohsiung (TW); Tsung-Tien Kuo, Kaohsiung (TW); and Kai-Chi Chang, Kaohsiung (TW)
Assigned to Taiwan Hopax Chemicals Mfg. Co., Ltd., Kaohsiung (TW)
Filed by Taiwan Hopax Chemicals Mfg. Co., Ltd., Kaohsiung (TW)
Filed on May 21, 2020, as Appl. No. 16/879,782.
Claims priority of application No. 108117623 (TW), filed on May 22, 2019; and application No. 109108363 (TW), filed on Mar. 13, 2020.
Prior Publication US 2020/0373539 A1, Nov. 26, 2020
Int. Cl. H01M 50/44 (2021.01); H01M 50/42 (2021.01); H01M 50/429 (2021.01); H01M 50/449 (2021.01); H01M 50/457 (2021.01); H01M 50/489 (2021.01)
CPC H01M 50/44 (2021.01) [H01M 50/42 (2021.01); H01M 50/429 (2021.01); H01M 50/4295 (2021.01); H01M 50/449 (2021.01); H01M 50/457 (2021.01); H01M 50/489 (2021.01)] 12 Claims
OG exemplary drawing
 
1. A porous carrier, comprising:
a cellulose substrate, consisting of a natural fiber, a modified natural fiber, or a combination thereof; and
a functional layer, directly located on at least one surface of the cellulose substrate, wherein the functional layer comprises an organic polymer elastic filler and a polymer binder,
wherein the organic polymer elastic filler includes poly methyl methacrylate (PMMA) or styrene-co-methyl methacrylate (PMMA-PS), and a weight percentage of the organic polymer elastic filler in the functional layer is between 50% and 99.9%,
wherein a coefficient of variation of a particle size distribution of the polymer particle is less than 5%, and
wherein a particle size of the organic polymer elastic filler is between 2.3 μm and 5 μm.