Super Dielectric Materials of Two-Dimensional TiO2 or Ca2Nb3O10 Nanosheet Hybrids with Reduced Graphene Oxide

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

研究成果: Contribution to journalArticle

5 引用 (Scopus)

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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.

元の言語英語
ページ(範囲)2074-2083
ページ数10
ジャーナルACS Omega
3
発行部数2
DOI
出版物ステータス出版済み - 2 28 2018
外部発表Yes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

フィンガープリント Super Dielectric Materials of Two-Dimensional TiO<sub>2</sub> or Ca<sub>2</sub>Nb<sub>3</sub>O<sub>10</sub> Nanosheet Hybrids with Reduced Graphene Oxide' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用

    Rabin, N. N., Ida, S., Karim, M. R., Islam, M. S., Ohtani, R., Nakamura, M., Koinuma, M., Lindoy, L. F., & Hayami, S. (2018). Super Dielectric Materials of Two-Dimensional TiO2 or Ca2Nb3O10 Nanosheet Hybrids with Reduced Graphene Oxide. ACS Omega, 3(2), 2074-2083. https://doi.org/10.1021/acsomega.7b01764