DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Hongkyung | ko |
dc.contributor.author | Kim, Yun-Jung | ko |
dc.contributor.author | Lee, Dong Jin | ko |
dc.contributor.author | Song, Jongchan | ko |
dc.contributor.author | Lee, Yong Min | ko |
dc.contributor.author | Kim, Hee-Tak | ko |
dc.contributor.author | Park, Jung-Ki | ko |
dc.date.accessioned | 2014-09-04T08:40:57Z | - |
dc.date.available | 2014-09-04T08:40:57Z | - |
dc.date.created | 2014-06-12 | - |
dc.date.created | 2014-06-12 | - |
dc.date.issued | 2014-08 | - |
dc.identifier.citation | JOURNAL OF MATERIALS CHEMISTRY A, v.2, no.30, pp.11891 - 11898 | - |
dc.identifier.issn | 2050-7488 | - |
dc.identifier.uri | http://hdl.handle.net/10203/190132 | - |
dc.description.abstract | The problem of carbon and binder decomposition, degrading the performance levels of the cathodes used in lithium oxygen (Li-O-2) batteries, remains unsolved. For this reason, using carbon and binder-free cathodes may be an ideal approach to remedy this problem. Here, we have developed a carbon free-and binder-free cathode for Li-O-2 batteries based on vertically grown Co3O4 nanowire (NW) arrays on Ni-foam and demonstrated the suppression of this type of decomposition. The highly organized texture and high catalytic activity of the cathode provide high capacity with a reduced overvoltage. Interestingly, the charge voltage profile changed with the discharge rate, which is associated with the variation in the phase and local distribution of the discharge products. At a low discharge rate, a morphology resembling the pointed tip of a brush was observed, indicating that the crystalline discharge products were concentrated on the skin of the cathode, causing the deformation of the NW array. At a high discharge rate, a more uniform distribution of the quasi-amorphous discharge products was favored, resulting in a relatively stable voltage profile with cycling. These findings suggest the importance of the electrode structure and discharge product distribution during the design of carbon- and binder-free cathodes. | - |
dc.language | English | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | NONAQUEOUS LI-O-2 BATTERIES | - |
dc.subject | SULFOXIDE-BASED ELECTROLYTE | - |
dc.subject | LI-AIR BATTERIES | - |
dc.subject | PERFORMANCE | - |
dc.subject | CHALLENGES | - |
dc.subject | STABILITY | - |
dc.subject | METAL | - |
dc.subject | DEGRADATION | - |
dc.subject | CAPACITORS | - |
dc.subject | LAYER | - |
dc.title | Directly grown Co3O4 nanowire arrays on Ni-foam: structural effects of carbon-free and binder-free cathodes for lithium-oxygen batteries | - |
dc.type | Article | - |
dc.identifier.wosid | 000339535100045 | - |
dc.identifier.scopusid | 2-s2.0-84904114980 | - |
dc.type.rims | ART | - |
dc.citation.volume | 2 | - |
dc.citation.issue | 30 | - |
dc.citation.beginningpage | 11891 | - |
dc.citation.endingpage | 11898 | - |
dc.citation.publicationname | JOURNAL OF MATERIALS CHEMISTRY A | - |
dc.identifier.doi | 10.1039/C4TA01311E | - |
dc.contributor.localauthor | Kim, Hee-Tak | - |
dc.contributor.localauthor | Park, Jung-Ki | - |
dc.contributor.nonIdAuthor | Kim, Yun-Jung | - |
dc.contributor.nonIdAuthor | Lee, Yong Min | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | NONAQUEOUS LI-O-2 BATTERIES | - |
dc.subject.keywordPlus | SULFOXIDE-BASED ELECTROLYTE | - |
dc.subject.keywordPlus | LI-AIR BATTERIES | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | CHALLENGES | - |
dc.subject.keywordPlus | STABILITY | - |
dc.subject.keywordPlus | METAL | - |
dc.subject.keywordPlus | DEGRADATION | - |
dc.subject.keywordPlus | CAPACITORS | - |
dc.subject.keywordPlus | LAYER | - |
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