論文

2018年2月28日

Super Dielectric Materials of Two-Dimensional TiO<inf>2</inf> or Ca<inf>2</inf>Nb<inf>3</inf>O<inf>10</inf> Nanosheet Hybrids with Reduced Graphene Oxide

ACS Omega
  • Nurun Nahar Rabin
  • ,
  • Shintaro Ida
  • ,
  • Mohammad Razaul Karim
  • ,
  • Md Saidul Islam
  • ,
  • Ryo Ohtani
  • ,
  • Masaaki Nakamura
  • ,
  • Michio Koinuma, Leonar
  • ,
  • F. Lindoy
  • ,
  • Shinya Hayami

3
開始ページ
2074
終了ページ
2083
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acsomega.7b01764

? 2018 American Chemical Society. High dielectric constants (er) were observed in two-dimensional composites obtained from stacking of reduced graphene oxide (RGO) with Ca2Nb3O10 and with TiO2 nanosheets. The relative dielectric permittivity values of the composites were found to be higher than 105, an amazingly high value compared to that of similar GO composites and other common dielectric materials. As a consequence, we considered application of the hybrids as super dielectric materials in high capacitance supercapacitors. The route to high capacitance involves the variation of oxygen vacancies within the surface and in the closest bulk interior of the hybrids. The effective charges generated throughout the metal oxide and carbon-oxygen polar bonding systems within the graphene skeleton appear to highly influence dielectric polarization. Moreover, the replenishment of oxygen vacancies at the RGO and metal oxide interface also contributes to polarizability.

リンク情報
DOI
https://doi.org/10.1021/acsomega.7b01764
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85054383717&origin=inward

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