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 language | English |
---|---|
Article number | 156218 |
Journal | Applied Surface Science |
Volume | 614 |
DOIs | |
Publication status | Published - 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