TY - JOUR
T1 - Solution-phase selenization engineering of zeolitic imidazolate framework (ZIF)-67-derived Co0.85Se@nitrogen-doped carbon for potassium-ion storage
AU - Kim, Min
AU - Kim, Ju Hyeong
AU - Kang, Yun Chan
N1 - 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.
PY - 2023/3/30
Y1 - 2023/3/30
N2 - 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.
AB - 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.
KW - Cobalt selenide
KW - Nitrogen-doped carbon
KW - Potassium-ion storage
KW - Selenization engineering
KW - Sodium hydroxy selenide
UR - http://www.scopus.com/inward/record.url?scp=85148063197&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2022.156218
DO - 10.1016/j.apsusc.2022.156218
M3 - Article
AN - SCOPUS:85148063197
SN - 0169-4332
VL - 614
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 156218
ER -