Hierarchical hollow microspheres grafted with Co nanoparticle-embedded bamboo-like N-doped carbon nanotube bundles as ultrahigh rate and long-life cathodes for rechargeable lithium-oxygen batteries
DC Field | Value | Language |
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dc.contributor.author | Kim, Jung Hyun | - |
dc.contributor.author | Park, Seung-Keun | - |
dc.contributor.author | Oh, Yeon Jong | - |
dc.contributor.author | Kang, Yun Chan | - |
dc.date.accessioned | 2021-09-02T14:55:21Z | - |
dc.date.available | 2021-09-02T14:55:21Z | - |
dc.date.created | 2021-06-16 | - |
dc.date.issued | 2018-02-15 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/77338 | - |
dc.description.abstract | Rational design of efficient, affordable, and durable electrocatalysts for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) is essential for rechargeable lithium-oxygen (Li-O-2) batteries. We present for the first time hierarchical hollow microspheres grafted with metallic Co-embedded bamboo-like N-doped carbon nanotube bundles (Co-b-NCNTs hollow microspheres) as oxygen electrodes for Li-air batteries. Hierarchical composite microspheres are prepared via a facile two-step process involving synthesis of Co3O4-MgO hollow microspheres by spray pyrolysis, followed by internal and external growth of bamboo-like NCNTs in the shells. During post-treatment, metallic Co and MgO nanoparticles play key respective roles in catalyzing in-situ growth of NCNTs and maintaining structural integrity of the composites. The hierarchical composite structure with Co and N doping not only provides ample active sites for the OER and ORR, but also sufficient space for storing produced Li2O2. Thus, Co-b-NCNTs hollow microspheres exhibit high initial round-trip efficiency, long-term cycling and ultrahigh rate performances when applied as oxygen electrodes for Li-O-2 batteries. The initial discharge capacity and round-trip efficiency at a current density of 200 mA g(-1) are 28,968 mA h g(-1) and 78.2%, respectively. Specific capacities at cutoff capacities of 500 and 1000 mA h g(-1) are stable for 201 and 157 cycles, respectively. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.subject | ORDERED MESOPOROUS CARBON | - |
dc.subject | SODIUM STORAGE | - |
dc.subject | NITROGEN | - |
dc.subject | EFFICIENT | - |
dc.subject | ELECTROCATALYST | - |
dc.subject | REDUCTION | - |
dc.subject | NANOSHEETS | - |
dc.subject | COMPOSITE | - |
dc.subject | CATALYST | - |
dc.subject | SULFUR | - |
dc.title | Hierarchical hollow microspheres grafted with Co nanoparticle-embedded bamboo-like N-doped carbon nanotube bundles as ultrahigh rate and long-life cathodes for rechargeable lithium-oxygen batteries | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kang, Yun Chan | - |
dc.identifier.doi | 10.1016/j.cej.2017.12.018 | - |
dc.identifier.scopusid | 2-s2.0-85037358832 | - |
dc.identifier.wosid | 000418533400249 | - |
dc.identifier.bibliographicCitation | CHEMICAL ENGINEERING JOURNAL, v.334, pp.2500 - 2510 | - |
dc.relation.isPartOf | CHEMICAL ENGINEERING JOURNAL | - |
dc.citation.title | CHEMICAL ENGINEERING JOURNAL | - |
dc.citation.volume | 334 | - |
dc.citation.startPage | 2500 | - |
dc.citation.endPage | 2510 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.subject.keywordPlus | ORDERED MESOPOROUS CARBON | - |
dc.subject.keywordPlus | SODIUM STORAGE | - |
dc.subject.keywordPlus | NITROGEN | - |
dc.subject.keywordPlus | EFFICIENT | - |
dc.subject.keywordPlus | ELECTROCATALYST | - |
dc.subject.keywordPlus | REDUCTION | - |
dc.subject.keywordPlus | NANOSHEETS | - |
dc.subject.keywordPlus | COMPOSITE | - |
dc.subject.keywordPlus | CATALYST | - |
dc.subject.keywordPlus | SULFUR | - |
dc.subject.keywordAuthor | Li-O-2 batteries | - |
dc.subject.keywordAuthor | Carbon nanotubes | - |
dc.subject.keywordAuthor | Hierarchical structure | - |
dc.subject.keywordAuthor | Cathode material | - |
dc.subject.keywordAuthor | Nanostructured material | - |
dc.subject.keywordAuthor | Spray pyrolysis | - |
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