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Lee, Sang-Young
Energy Soft-Materials Lab (ESML)
Research Interests
  • Soft Materials for Energy Storage/ Conversion Systems


Eco-friendly cellulose nanofiber paper-derived separator membranes featuring tunable nanoporous network channels for lithium-ion batteries

DC Field Value Language Chun, Sang-Jin ko Choi, Eun-Sun ko Lee, Eun-Ho ko Kim, Jung Hyeun ko Lee, Sun-Young ko Lee, Sang-Young ko 2014-09-18T02:26:51Z - 2014-09-17 ko 2012 ko
dc.identifier.citation JOURNAL OF MATERIALS CHEMISTRY, v.22, no.32, pp.16618 - 16626 ko
dc.identifier.issn 0959-9428 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract Eco-friendly cellulose nanofibers (CNFs), a core constituent of cellulose, have garnered increasing attention as a promising sustainable building block source for advanced materials in various application fields. In the present study, we successfully fabricate a cellulose nanofiber paper from a CNF suspension and explore its potential application to a separator membrane for lithium-ion batteries. In contrast to macro/microscopic cellulose fibers that have been commonly used for typical papers, the CNFs are characterized by the nanometer-scale diameter/length up to several micrometers and highly crystalline domains, contributing to excellent mechanical/thermal properties and nanoporous structure evolution. A salient feature of the cellulose nanofiber paper-derived separator membrane (referred to as "CNP separator") is an electrolyte-philic, nanoscale labyrinth structure established between closely piled CNFs. The unusual porous structure is fine-tuned by varying the composition ratio of the solvent mixture (= isopropyl alcohol (IPA)-water) in the CNF suspension, wherein IPA is introduced as a CNF-disassembling agent while water promotes dense packing of CNFs. Based on a solid understanding of separator characteristics, electrochemical performances of cells assembled with the CNP separators are investigated. Notably, the CNP separator manufactured with IPA-water = 95/5 (vol/vol%) exhibits highly interconnected nanoporous network channels and satisfactory mechanical properties, which play a significant role in improving separator properties and cell performance. This study underlines that the porous structure-tuned cellulose nanofiber papers provide a promising new route for the fabrication of advanced separator membranes, which will also serve as a key component to boost the development of next-generation paper batteries. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher ROYAL SOC CHEMISTRY ko
dc.subject Advanced materials ko
dc.subject Application fields ko
dc.subject Cell performance ko
dc.subject Cellulose fiber ko
dc.subject Cellulose nanofibers ko
dc.subject Composition ratio ko
dc.subject Crystalline domains ko
dc.subject Dense packing ko
dc.subject Eco-friendly ko
dc.subject Electrochemical performance ko
dc.subject Isopropyl alcohols ko
dc.subject Labyrinth structure ko
dc.subject Lithium-ion battery ko
dc.subject Mechanical/thermal properties ko
dc.subject Nano scale ko
dc.subject Nano-meter-scale ko
dc.subject Nanoporous networks ko
dc.subject Nanoporous structures ko
dc.subject Paper battery ko
dc.subject Porous structures ko
dc.subject Potential applications ko
dc.subject Salient features ko
dc.subject Solvent mixtures ko
dc.subject Sustainable building ko
dc.title Eco-friendly cellulose nanofiber paper-derived separator membranes featuring tunable nanoporous network channels for lithium-ion batteries ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84864222572 ko
dc.identifier.wosid 000306708700065 ko
dc.type.rims ART ko
dc.description.wostc 31 *
dc.description.scopustc 22 * 2015-05-06 * 2014-09-17 *
dc.identifier.doi 10.1039/c2jm32415f ko
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