Prussian blue analogue nanocubes with hollow interior and porous walls encapsulated within reduced graphene oxide nanosheets and their sodium-ion storage performances

Jin Sung Park, Sungjin Yang, Yun Chan Kang

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

Metal-organic frameworks (MOFs) have attracted considerable research attention due to their functional characteristics such as tailorable architecture and adjustable pore sizes. In particular, the assembly of such MOFs has been widely studied because of their unprecedented physicochemical properties. In this paper, a strategy is presented for the synthesis of nanostructure-tunable MOFs assembled within reduced graphene oxide (rGO) nanosheets via colloidal spray pyrolysis process. The spray pyrolysis of Prussian blue nanocubes and graphene oxide (GO) nanosheets dispersed in an aqueous solution, and the subsequent sulfidation heat-treatment yields Prussian blue analogue nanocubes with a hollow interior and porous walls encapsulated within rGO. Through spray pyrolysis process, large-scale synthesis of nanostructure-tunable MOFs assembled within rGO nanosheets could be realized in one-pot process. The MOFs can be uniformly encapsulated within rGO nanosheets through spray pyrolysis process, which is beneficial for improving cycle and rate performances, when applied as the anode material for sodium ion batteries. In particular, the rGO matrix acts as a highway for electron transport, resulting in remarkable discharge capacities of 413 mA h g−1, even at a high current density of 10 A g−1. To provide supplementary structural integrity for a longer cycle life, polydopamine-derived N-doped carbon is coated on the spherical composite, and the electrochemical performance of the anode material for sodium ion storage is analyzed in detail. It is believed that this strategy could pave the way towards the synthesis of superstructures filled with structure-tunable MOFs that have wide applicability.

Original languageEnglish
Article number124606
JournalChemical Engineering Journal
Volume393
DOIs
Publication statusPublished - 2020 Aug 1

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2019R1A2C2088047).

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

  • N-doped carbon
  • Prussian blue
  • Reduced graphene oxide
  • Sodium-ion batteries
  • Spray pyrolysis

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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