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Kang, Seok Ju
Smart Materials for Energy Lab.
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dc.citation.endPage 501 -
dc.citation.number 1 -
dc.citation.startPage 492 -
dc.citation.volume 14 - Hwang, Chihyun - Kwak, Myung-Jun - Jeong, Jinhyeon - Baek, Kyungeun - Yoon, Ki-Yong - An, Cheolwon - Min, Jin-Wook - Kim, Jonghak - Lee, Jeongin - Kang, Seok Ju - Jang, Ji-Hyun - Song, Hyun-Kon - 2023-12-21T14:43:05Z - 2023-12-21T14:43:05Z - 2022-01-05 - 2022-01 -
dc.description.abstract High-energy density lithium–oxygen batteries (LOBs) seriously suffer from poor rate capability and cyclability due to the slow oxygen-related electrochemistry and uncontrollable formation of lithium peroxide (Li2O2) as an insoluble discharge product. In this work, we accommodated the discharge product in macro-scale voids of a carbon-framed architecture with meso-dimensional channels on the carbon frame and open holes connecting the neighboring voids. More importantly, we found that a specific dimension of the voids guaranteed high capacity and cycling durability of LOBs. The best LOB performances were achieved by employing the carbon-framed architecture having voids of 0.8 μm size as the cathode of the LOB when compared with the cathodes having voids of 0.3 and 1.4 μm size. The optimized void size of 0.8 μm allowed only a monolithic integrity of lithium peroxide deposit within a void during discharging. The deposit was grown to be a yarn ball-looking sphere exactly fitting the shape and size of the void. The good electric contact allowed the discharge product to be completely decomposed during charging. On the other hand, the void space was not fully utilized due to the mass transfer pathway blockage at the sub-optimized 0.3 μm and the formation of multiple deposit integrities within a void at the sur-optimized 1.4 μm. Consequently, the critical void dimension at 0.8 μm was superior to other dimensions in terms of the void space utilization efficiency and the lithium peroxide decomposition efficiency, disallowing empty space and side reactions during discharging. -
dc.identifier.bibliographicCitation ACS APPLIED MATERIALS & INTERFACES, v.14, no.1, pp.492 - 501 -
dc.identifier.doi 10.1021/acsami.1c14859 -
dc.identifier.issn 1944-8244 -
dc.identifier.scopusid 2-s2.0-85121902575 -
dc.identifier.uri -
dc.identifier.url -
dc.identifier.wosid 000736114200001 -
dc.language 영어 -
dc.publisher AMER CHEMICAL SOC -
dc.title Critical Void Dimension of Carbon Frameworks to Accommodate Insoluble Products of Lithium–Oxygen Batteries -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Nanoscience & Nanotechnology;Materials Science, Multidisciplinary -
dc.relation.journalResearchArea Science & Technology - Other Topics;Materials Science -
dc.type.docType Article -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor carbon frameworks -
dc.subject.keywordAuthor macro-void -
dc.subject.keywordAuthor discharge product -
dc.subject.keywordAuthor lithium peroxide -
dc.subject.keywordPlus LI-O-2 -
dc.subject.keywordPlus RECHARGEABILITY -
dc.subject.keywordPlus EVOLUTION -
dc.subject.keywordPlus GRAPHENE -


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