Solution-phase selenization engineering of zeolitic imidazolate framework (ZIF)-67-derived Co0.85Se@nitrogen-doped carbon for potassium-ion storage

Min Kim, Ju Hyeong Kim, Yun Chan Kang

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Research on the synthesizing high-efficiency energy storage materials, which can the replace the harsh methods that require high temperature or high pressure, with methods that are more convenient and eco-friendly, are crucial for next-generation battery manufacturing. Herein, we introduce a facile method for the direct and short-term selenization of cobalt ions in zeolitic imidazolate framework-67 (ZIF-67) using a NaHSe solution. Co0.85Se@nitrogen-doped carbon nanostructures (sol-CoSe@NC) obtained after the subsequent Ar heat treatment for the crystallization of Co–Se bonds and the carbonization of organic matter displayed outstanding electrochemical performances in potassium-ion batteries, compared to those fabricated by the well-known gas-phase selenization process. Long cycle life, over 140 cycles (367.7 mA h g−1 at 0.1 A g−1), and excellent rate capability up to 4.0 A g−1 (202.9 mA h g−1) of the sol-CoSe@NC electrode indicated that the ultrafine distribution of Co0.85Se nanoparticles via a low-temperature and low-pressure solution-phase selenization process within the mesoporous structure derived from metal-organic framework could favorably work for the repeated insertion and desertion of potassium ions.

Original languageEnglish
Article number156218
JournalApplied Surface Science
Volume614
DOIs
Publication statusPublished - 2023 Mar 30

Bibliographical note

Funding Information:
This research was supported by the Bio & Medical Technology Development Program of the National Research Foundation (NRF) & funded by the Korean government (NRF-2022M3A9I3082366).

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

  • Cobalt selenide
  • Nitrogen-doped carbon
  • Potassium-ion storage
  • Selenization engineering
  • Sodium hydroxy selenide

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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