DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jang, Jung-Kyu | ko |
dc.contributor.author | Jo, Sang-Woo | ko |
dc.contributor.author | Jeon, Jun Woo | ko |
dc.contributor.author | Kim, Byoung Gak | ko |
dc.contributor.author | Yoon, Sang Jun | ko |
dc.contributor.author | Yu, Duk Man | ko |
dc.contributor.author | Hong, Young Taik | ko |
dc.contributor.author | Kim, Hee-Tak | ko |
dc.contributor.author | Kim, Tae-Ho | ko |
dc.date.accessioned | 2021-06-21T07:10:29Z | - |
dc.date.available | 2021-06-21T07:10:29Z | - |
dc.date.created | 2021-06-21 | - |
dc.date.created | 2021-06-21 | - |
dc.date.issued | 2021-05 | - |
dc.identifier.citation | ACS APPLIED ENERGY MATERIALS, v.4, no.5, pp.4672 - 4685 | - |
dc.identifier.issn | 2574-0962 | - |
dc.identifier.uri | http://hdl.handle.net/10203/286029 | - |
dc.description.abstract | Achieving high proton conductivity, low vanadium ion permeability, and high chemical stability using a single material remains a key challenge for hydrocarbon-based membranes for use in vanadium redox flow batteries (VRFBs). Herein, we report amorphous poly(2,5-benzimidazole) (ABPBI) membranes with alkyl spacers which can meet these requirements. Spacer-grafted poly(2,5-benzimidazole)s (ABPBIs) with different grafting ratios were synthesized via an N-substitution reaction and denoted as ABPBI-0, -10, -25, -40, and -50, respectively. The structure to battery performance relationship was investigated through spectroscopic and electrochemical analysis. As the grafting ratio increased, the microstructure of the ABPBI derivative membranes was transformed from a semicrystalline to an amorphous structure because of reduced chain packing, increasing H2SO4-absorption capability and consequently reducing area-specific resistances. Also, they exhibited lower vanadium permeabilities compared with Nafion 115 owing to Donnan exclusion effect. As a combined effect of these characteristics, the membranes outperformed Nafion 115 membrane with notably high coulomb efficiencies and energy efficiencies. Furthermore, a grafted ABPBI membrane showed stable battery cycling performance more than 500 cycles at 200 mAcm(-2), and 1000 h continuous operation at 1C-rate, demonstrating excellent chemical stability against highly oxidizing VO2+ solution. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Alkyl Spacer Grafted ABPBI Membranes with Enhanced Acid-Absorption Capabilities for Use in Vanadium Redox Flow Batteries | - |
dc.type | Article | - |
dc.identifier.wosid | 000656119600043 | - |
dc.identifier.scopusid | 2-s2.0-85106559388 | - |
dc.type.rims | ART | - |
dc.citation.volume | 4 | - |
dc.citation.issue | 5 | - |
dc.citation.beginningpage | 4672 | - |
dc.citation.endingpage | 4685 | - |
dc.citation.publicationname | ACS APPLIED ENERGY MATERIALS | - |
dc.identifier.doi | 10.1021/acsaem.1c00280 | - |
dc.contributor.localauthor | Kim, Hee-Tak | - |
dc.contributor.nonIdAuthor | Jeon, Jun Woo | - |
dc.contributor.nonIdAuthor | Kim, Byoung Gak | - |
dc.contributor.nonIdAuthor | Yoon, Sang Jun | - |
dc.contributor.nonIdAuthor | Yu, Duk Man | - |
dc.contributor.nonIdAuthor | Hong, Young Taik | - |
dc.contributor.nonIdAuthor | Kim, Tae-Ho | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | PBI membrane | - |
dc.subject.keywordAuthor | ABPBI membrane | - |
dc.subject.keywordAuthor | VRFB | - |
dc.subject.keywordAuthor | Vanadium permeability | - |
dc.subject.keywordAuthor | alkyl spacers | - |
dc.subject.keywordAuthor | grafting ratio | - |
dc.subject.keywordAuthor | free volume | - |
dc.subject.keywordPlus | POROUS POLYBENZIMIDAZOLE MEMBRANES | - |
dc.subject.keywordPlus | ANION-EXCHANGE MEMBRANES | - |
dc.subject.keywordPlus | PROTON-EXCHANGE | - |
dc.subject.keywordPlus | COULOMBIC EFFICIENCY | - |
dc.subject.keywordPlus | CELL PERFORMANCE | - |
dc.subject.keywordPlus | HIGH SELECTIVITY | - |
dc.subject.keywordPlus | WATER-UPTAKE | - |
dc.subject.keywordPlus | CONDUCTIVITY | - |
dc.subject.keywordPlus | PERMEABILITY | - |
dc.subject.keywordPlus | DEGRADATION | - |
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