Abstract
Multishell structured metal selenide nanocubes, namely, Co/(NiCo)Se2 box-in-box structures with different shell compositions, were successfully synthesized by applying zeolitic imidazolate framework-67 (ZIF-67) as a template. This strategy involved the fabrication of cube-shaped ZIF-67/Ni-Co layered double hydroxides with a yolk-shell structure and then transformation into Co/(NiCo)Se2 with a box-in-box structure by a selenization process under Ar/H2 conditions. During the selenization step, hollow structured CoSe2 cores were generated by Ostwald ripening, resulting in the formation of Co/(NiCo)Se2 with a box-in-box structure composed of an inner CoSe2 shell and an outer (NiCo)Se2 shell. Due to the synergetic effect of the unique structure and multicomponent selenide composition, the Co/(NiCo)Se2 with the box-in-box structure offered excellent dual functionality as both an anode for sodium ion batteries (SIBs) and an electrocatalyst for the hydrogen evolution reaction (HER). Electrochemical tests on the Co/(NiCo)Se2 with the box-in-box structure demonstrated a low Tafel slope (39.8 mV dec-1) and excellent stability. In addition, it delivered a high specific capacity of 497 mA h g-1 after 80 cycles, with a current density of 0.2 A g-1 and excellent cycling stability as an anode material for SIBs.
| Original language | English |
|---|---|
| Pages (from-to) | 18823-18830 |
| Number of pages | 8 |
| Journal | Journal of Materials Chemistry A |
| Volume | 5 |
| Issue number | 35 |
| DOIs | |
| Publication status | Published - 2017 Jan 1 |
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ASJC Scopus subject areas
- Chemistry(all)
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
Cite this
Metal-organic framework-derived CoSe2/(NiCo)Se2 box-in-box hollow nanocubes with enhanced electrochemical properties for sodium-ion storage and hydrogen evolution. / Park, Seung Keun; Kim, Jin Koo; Kang, Yun Chan.
In: Journal of Materials Chemistry A, Vol. 5, No. 35, 01.01.2017, p. 18823-18830.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Metal-organic framework-derived CoSe2/(NiCo)Se2 box-in-box hollow nanocubes with enhanced electrochemical properties for sodium-ion storage and hydrogen evolution
AU - Park, Seung Keun
AU - Kim, Jin Koo
AU - Kang, Yun Chan
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Multishell structured metal selenide nanocubes, namely, Co/(NiCo)Se2 box-in-box structures with different shell compositions, were successfully synthesized by applying zeolitic imidazolate framework-67 (ZIF-67) as a template. This strategy involved the fabrication of cube-shaped ZIF-67/Ni-Co layered double hydroxides with a yolk-shell structure and then transformation into Co/(NiCo)Se2 with a box-in-box structure by a selenization process under Ar/H2 conditions. During the selenization step, hollow structured CoSe2 cores were generated by Ostwald ripening, resulting in the formation of Co/(NiCo)Se2 with a box-in-box structure composed of an inner CoSe2 shell and an outer (NiCo)Se2 shell. Due to the synergetic effect of the unique structure and multicomponent selenide composition, the Co/(NiCo)Se2 with the box-in-box structure offered excellent dual functionality as both an anode for sodium ion batteries (SIBs) and an electrocatalyst for the hydrogen evolution reaction (HER). Electrochemical tests on the Co/(NiCo)Se2 with the box-in-box structure demonstrated a low Tafel slope (39.8 mV dec-1) and excellent stability. In addition, it delivered a high specific capacity of 497 mA h g-1 after 80 cycles, with a current density of 0.2 A g-1 and excellent cycling stability as an anode material for SIBs.
AB - Multishell structured metal selenide nanocubes, namely, Co/(NiCo)Se2 box-in-box structures with different shell compositions, were successfully synthesized by applying zeolitic imidazolate framework-67 (ZIF-67) as a template. This strategy involved the fabrication of cube-shaped ZIF-67/Ni-Co layered double hydroxides with a yolk-shell structure and then transformation into Co/(NiCo)Se2 with a box-in-box structure by a selenization process under Ar/H2 conditions. During the selenization step, hollow structured CoSe2 cores were generated by Ostwald ripening, resulting in the formation of Co/(NiCo)Se2 with a box-in-box structure composed of an inner CoSe2 shell and an outer (NiCo)Se2 shell. Due to the synergetic effect of the unique structure and multicomponent selenide composition, the Co/(NiCo)Se2 with the box-in-box structure offered excellent dual functionality as both an anode for sodium ion batteries (SIBs) and an electrocatalyst for the hydrogen evolution reaction (HER). Electrochemical tests on the Co/(NiCo)Se2 with the box-in-box structure demonstrated a low Tafel slope (39.8 mV dec-1) and excellent stability. In addition, it delivered a high specific capacity of 497 mA h g-1 after 80 cycles, with a current density of 0.2 A g-1 and excellent cycling stability as an anode material for SIBs.
UR - http://www.scopus.com/inward/record.url?scp=85029479084&partnerID=8YFLogxK
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U2 - 10.1039/c7ta05571d
DO - 10.1039/c7ta05571d
M3 - Article
AN - SCOPUS:85029479084
VL - 5
SP - 18823
EP - 18830
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
IS - 35
ER -