DC Field | Value | Language |
---|---|---|
dc.contributor.author | Nam, Hyeongyun | ko |
dc.contributor.author | Park, Jae Yeol | ko |
dc.contributor.author | Yuk, Jong Min | ko |
dc.contributor.author | Han, Seung Min Jane | ko |
dc.date.accessioned | 2022-01-04T06:40:15Z | - |
dc.date.available | 2022-01-04T06:40:15Z | - |
dc.date.created | 2022-01-04 | - |
dc.date.created | 2022-01-04 | - |
dc.date.created | 2022-01-04 | - |
dc.date.issued | 2022-03 | - |
dc.identifier.citation | ENERGY STORAGE MATERIALS, v.45, pp.101 - 109 | - |
dc.identifier.issn | 2405-8297 | - |
dc.identifier.uri | http://hdl.handle.net/10203/291472 | - |
dc.description.abstract | Diffusion-induced stresses in Sn, a promising anode material for Li-ion batteries owing to its high specific capacity, depend significantly on the phase transformation mechanism. In this study, an in-situ X-ray diffraction study is performed to reveal the phase transformation mechanism in Sn as functions of the discharge rate and Sn anode dimensions. In a 500 nm-thick Sn thin-film discharged at C/9 or a 100 nm-thick Sn thin-film discharged at 0.1 C, the Sn phase transforms sequentially to Li2Sn5, followed by β-LiSn and a-Li7Sn3 in three steps, where each step involves reaction-controlled lithiation. However, in a 500 nm-thick Sn thin-film discharged at 2 C or a 2 μm-thick Sn thin-film discharged at 0.1 C, the a-Li7Sn3 phase is directly formed via one-step reaction-controlled lithiation between Sn and a-Li7Sn3. A transition from three-step to one-step results in a steep gradient in the mismatch strain, thereby causing early failure. Finite element simulations show a lower J-integral for the three steps compared with that of a one-step reaction, thereby confirming previously reported experimental observations. For a specified transformation mechanism, the J-integral is lower for smaller Sn micropillars. Therefore, the mechanical reliability of the Sn anode can be enhanced significantly when lithiated under phase transformation mechanism involving three-reaction-controlled lithiations, as well as utilizing a small Sn anode measuring less than 200 nm. | - |
dc.language | English | - |
dc.publisher | ELSEVIER | - |
dc.title | Phase transformation mechanism and stress evolution in Sn anode | - |
dc.type | Article | - |
dc.identifier.wosid | 000783179300001 | - |
dc.identifier.scopusid | 2-s2.0-85120439873 | - |
dc.type.rims | ART | - |
dc.citation.volume | 45 | - |
dc.citation.beginningpage | 101 | - |
dc.citation.endingpage | 109 | - |
dc.citation.publicationname | ENERGY STORAGE MATERIALS | - |
dc.identifier.doi | 10.1016/j.ensm.2021.11.034 | - |
dc.contributor.localauthor | Yuk, Jong Min | - |
dc.contributor.localauthor | Han, Seung Min Jane | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Sn anode | - |
dc.subject.keywordAuthor | Li-ion battery | - |
dc.subject.keywordAuthor | Phase transformation | - |
dc.subject.keywordAuthor | C rate | - |
dc.subject.keywordAuthor | Length scale | - |
dc.subject.keywordAuthor | Mechanical reliability | - |
dc.subject.keywordPlus | X-RAY-DIFFRACTION | - |
dc.subject.keywordPlus | HIGH-CAPACITY | - |
dc.subject.keywordPlus | LITHIUM | - |
dc.subject.keywordPlus | TIN | - |
dc.subject.keywordPlus | SILICON | - |
dc.subject.keywordPlus | LITHIATION | - |
dc.subject.keywordPlus | NANOCOMPOSITES | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordPlus | DEFORMATION | - |
dc.subject.keywordPlus | ELECTRODES | - |
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