Colloidal silica nanoparticle-assisted structural control of cellulose nanofiber paper separators for lithium-ion batteries
Cited 2 times inCited 2 times in
- Colloidal silica nanoparticle-assisted structural control of cellulose nanofiber paper separators for lithium-ion batteries
- Kim, Jeong-Hoon; Kim, Jung-Hwan; Choi, Eun-Sun; Yu, Hyung Kyun; Kim, Jong Hun; Wu, Qinglin; Chun, Sang-Jin; Lee, Sun-Young; Lee, Sang-Young
- Cellulose nanofibers; Colloidal silica; Lithium-ion battery; Porous structures; Spacer particles
- Issue Date
- ELSEVIER SCIENCE BV
- JOURNAL OF POWER SOURCES, v.242, no., pp.533 - 540
- Porous structure-tuned cellulose nanofiber paper separators (designated as S-CNP separators) are demonstrated as a promising alternative to commercial polyolefin separators for use in lithium-ion batteries. A new architectural strategy based on colloidal silica (SiO2) nanoparticle-assisted structural control is presented to overcome the difficulty in forming controllable porous structure of pure cellulose nanofiber paper separators (designated as CNP separators) from densely-packed cellulose nanofibers (CNFs). The new S-CNP separators proposed herein incorporate SiO2 nanoparticles as a CNF-disassembling agent (i.e., as non-conductive spacer particles). This structural uniqueness allows loose packing of CNFs, thereby facilitating the evolution of more porous structure. The unusual porous structure of S-CNP separators can be fine-tuned by varying SiO2 contents in the CNF suspension. Notably, the S-CNP separator (fabricated with 5 wt.% SiO2 content) exhibits the highest ionic conduction due to the well-balanced combination of nanoporous structure and separator thickness, thus contributing to excellent cell performance. This study underlines that the colloidal SiO2 nanoparticle-directed structural tuning of CNPs offers a promising route for the fabrication of advanced paper separators with optimized attributes and functionality.
- ; Go to Link
Appears in Collections:
- ECHE_Journal Papers
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.