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Stabilized Octahedral Frameworks in Layered Double Hydroxides by Solid-Solution Mixing of Transition Metals
DC Field | Value | Language |
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dc.contributor.author | Lee, Ji Hoon | - |
dc.contributor.author | Lee, Hyeon Jeong | - |
dc.contributor.author | Lim, Soo Yeon | - |
dc.contributor.author | Chae, Keun Hwa | - |
dc.contributor.author | Park, Sung Hyeon | - |
dc.contributor.author | Chung, Kyung Yoon | - |
dc.contributor.author | Deniz, Erhan | - |
dc.contributor.author | Choi, Jang Wook | - |
dc.date.accessioned | 2020-03-16T11:10:51Z | - |
dc.date.available | 2020-03-16T11:10:51Z | - |
dc.date.created | 2018-06-29 | - |
dc.date.issued | 2017-02 | - |
dc.identifier.citation | Advanced Functional Materials, Vol.27 No.7, p. 1605225 | - |
dc.identifier.issn | 1616-301X | - |
dc.identifier.other | 38406 | - |
dc.identifier.uri | https://hdl.handle.net/10371/164703 | - |
dc.description.abstract | Pseudocapacitors have received considerable attention, as they possess advantages of both rechargeable batteries and electric double layer capacitors. Among various active materials for pseudocapacitors, alpha-layered double hydroxides (alpha-TM(OH)(2), TM = transition metal) are promising due to their high specific capacities. Yet, irreversible alpha-to-beta phase transitions of alpha-TM(OH)(2) hinder their long-term cyclability, particularly when the TM is nickel. Here, it is reported that binary TM ion mixing can overcome the limited cycle lives of alpha-TM(OH)(2) by stabilizing the octahedral frameworks of alpha-TM(OH)(2). In particular, an alpha-TM(OH)(2) with equal amounts of nickel and cobalt exhibits long-term capacity retention (89.0% after 2000 cycles) and specific capacity (206 mA h g(-1)), which are better than those of individual TM counterparts. A series of analyses reveals that the improved performances originate from the synergistic effects between the TM ions; the preferred trivalent state of cobalt ions stabilizes the octahedral framework by accommodating the detrimental Jahn-Teller distortion of Ni3+. The stabilized framework also widens the redox swing range of the nickel up to 4+, thus, increasing the specific capacity of the corresponding alpha-TM(OH)(2). This study indicates that proper mixing of TMs is a prolific approach in enhancing the vital properties of alpha-TM(OH)(2), a promising family of pseudocapacitor materials. | - |
dc.language | 영어 | - |
dc.publisher | John Wiley & Sons Ltd. | - |
dc.title | Stabilized Octahedral Frameworks in Layered Double Hydroxides by Solid-Solution Mixing of Transition Metals | - |
dc.type | Article | - |
dc.contributor.AlternativeAuthor | 최장욱 | - |
dc.identifier.doi | 10.1002/adfm.201605225 | - |
dc.citation.journaltitle | Advanced Functional Materials | - |
dc.identifier.wosid | 000394681900005 | - |
dc.identifier.scopusid | 2-s2.0-85007481133 | - |
dc.citation.number | 7 | - |
dc.citation.startpage | 1605225 | - |
dc.citation.volume | 27 | - |
dc.identifier.sci | 000394681900005 | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Choi, Jang Wook | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | ELECTROCHEMICAL CAPACITORS | - |
dc.subject.keywordPlus | NICKEL-HYDROXIDE | - |
dc.subject.keywordPlus | HIGH-PERFORMANCE | - |
dc.subject.keywordPlus | ENERGY-STORAGE | - |
dc.subject.keywordPlus | CRYSTAL WATER | - |
dc.subject.keywordPlus | SUPERCAPACITOR | - |
dc.subject.keywordPlus | ELECTRODES | - |
dc.subject.keywordPlus | NANOSHEETS | - |
dc.subject.keywordPlus | ALPHA-NI(OH)(2) | - |
dc.subject.keywordPlus | BATTERIES | - |
dc.subject.keywordAuthor | crystal field theory | - |
dc.subject.keywordAuthor | Jahn–Teller effects | - |
dc.subject.keywordAuthor | layered double hydroxides | - |
dc.subject.keywordAuthor | octahedral coordination | - |
dc.subject.keywordAuthor | solid-solution mixing | - |
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