Thermolytically grafted silicon particles with ultrathin carbonaceous coating rich of phenyl moieties as lithium-storage anode material
DC Field | Value | Language |
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dc.contributor.author | Xuan Tran M. | - |
dc.contributor.author | Woo J.-Y. | - |
dc.contributor.author | Nguyen T.-A. | - |
dc.contributor.author | Lee S.-W. | - |
dc.contributor.author | Lee J. K. | - |
dc.date.available | 2020-07-02T00:36:36Z | - |
dc.date.created | 2020-05-06 | - |
dc.date.issued | 2020-09 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/60113 | - |
dc.description.abstract | The most critical bottleneck of Si anode materials is an inevitable cracking and pulverization of Si nanostructure during electrochemical cycling process, resulting in a significant loss of electrical contact and rapid capacity fading. The low-temperature thermolytic grafting process at 360–400 °C was employed to produce a conformal carbon coating on a bundle-like porous silicon (por-Si) prepared by silver-assisted chemical etching. During the thermolytic grafting process, polystyrene infiltrated in the por-Si was depolymerized into styrenic carbon fragments rich of phenyl moieties. The styrenic carbon fragments were subsequently grafted uniformly on the por-Si surface as an ultrathin carbonaceous film of 5 nm, which was confirmed by transmission electronic microscope, X-ray photoelectron spectroscopy, and energy dispersive X-ray spectroscopy. The polystyrene grafted por-Si (por-Si@PS) was employed as a lithium-storage anode material. After 100 cycles at a current rate of 0.5C, the por-Si@PS anode exhibited an excellent reversible capacity of 1938.82 mAh g−1, when compared to those of por-Si and pristine Si anodes with 1228.57 mAh g−1 and 117.43 mAh g−1. The por-Si@PS exhibited a good recovery capability of 93.1% in the C-rate test. The ultrathin carbonaceous coating rich of phenyl moieties not only prevents the rapid pulverization of nanostructured Si, but also enhances the interfacial properties of por-Si@PS as lithium-storage anode material. Notably, the thermolytically grafted Si-C species rich of phenyl moieties played as a strong adhesive passivation layer against the corrosive electrochemical agents during cycling. © 2020 Elsevier B.V. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | Elsevier B.V. | - |
dc.relation.isPartOf | Chemical Engineering Journal | - |
dc.title | Thermolytically grafted silicon particles with ultrathin carbonaceous coating rich of phenyl moieties as lithium-storage anode material | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.identifier.wosid | 000537152400006 | - |
dc.identifier.doi | 10.1016/j.cej.2020.125169 | - |
dc.identifier.bibliographicCitation | Chemical Engineering Journal, v.395 | - |
dc.description.isOpenAccess | N | - |
dc.identifier.scopusid | 2-s2.0-85083875310 | - |
dc.citation.title | Chemical Engineering Journal | - |
dc.citation.volume | 395 | - |
dc.contributor.affiliatedAuthor | Nguyen T.-A. | - |
dc.contributor.affiliatedAuthor | Lee S.-W. | - |
dc.type.docType | Article | - |
dc.subject.keywordAuthor | Bundle-like porous Si | - |
dc.subject.keywordAuthor | Low temperature thermolytic grafting | - |
dc.subject.keywordAuthor | Phenyl moieties | - |
dc.subject.keywordAuthor | Ultrathin carbonaceous film | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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