Investigation of the potassium-ion storage mechanism of nickel selenide materials and rational design of nickel selenide-C yolk-shell structure for enhancing electrochemical properties

Min Kim; Gi Dae Park; Yun Chan Kang

doi:10.1002/er.7523

Investigation of the potassium-ion storage mechanism of nickel selenide materials and rational design of nickel selenide-C yolk-shell structure for enhancing electrochemical properties

Min Kim, Gi Dae Park, Yun Chan Kang

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Metal selenide is contemplated as expeditious anode material for potassium-ion batteries (KIBs). Here, nickel selenide (NiSe₂-Ni_0.85Se) was investigated as an anode material for KIBs. The NiSe_x transformed into K₂Se and K₂Se₃ (K₂Se_x) and reversibly returned to NiSe_x after the discharge and charge processes (17NiSe₂ + 3Ni_0.85Se + 38 K⁺ + 38e⁻ ↔ 19.55Ni + 10K₂Se + 9K₂Se₃). Furthermore, to enhance the electrochemical properties of nickel selenide, yolk-shell-structured nickel selenide and hollow carbon nanosphere composites, in which nickel selenides intensively existed in the core and were partially formed into nanocrystals in the shell, were produced by simple salt-infiltration and a post-treatment. NiSe_x@C exhibited improved cycle and rate properties compared to bare NiSe_x because of its structural merits that led to stable cycle performance and high electrochemical kinetics. NiSe_x@C exhibited 373 mA h g⁻¹ for the 100th cycle at 0.05 A g⁻¹ and 234 mA h g⁻¹ at 1.0 A g⁻¹.

Original language	English
Journal	International Journal of Energy Research
DOIs	https://doi.org/10.1002/er.7523
Publication status	Accepted/In press - 2021

Keywords

hollow carbon
nickel selenide
potassium-ion batteries
transition metal chalcogenide
yolk-shell structure

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Nuclear Energy and Engineering
Fuel Technology
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/er.7523

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@article{c482b998b8884e41be0aa032448770a6,

title = "Investigation of the potassium-ion storage mechanism of nickel selenide materials and rational design of nickel selenide-C yolk-shell structure for enhancing electrochemical properties",

abstract = "Metal selenide is contemplated as expeditious anode material for potassium-ion batteries (KIBs). Here, nickel selenide (NiSe2-Ni0.85Se) was investigated as an anode material for KIBs. The NiSex transformed into K2Se and K2Se3 (K2Sex) and reversibly returned to NiSex after the discharge and charge processes (17NiSe2 + 3Ni0.85Se + 38 K+ + 38e− ↔ 19.55Ni + 10K2Se + 9K2Se3). Furthermore, to enhance the electrochemical properties of nickel selenide, yolk-shell-structured nickel selenide and hollow carbon nanosphere composites, in which nickel selenides intensively existed in the core and were partially formed into nanocrystals in the shell, were produced by simple salt-infiltration and a post-treatment. NiSex@C exhibited improved cycle and rate properties compared to bare NiSex because of its structural merits that led to stable cycle performance and high electrochemical kinetics. NiSex@C exhibited 373 mA h g−1 for the 100th cycle at 0.05 A g−1 and 234 mA h g−1 at 1.0 A g−1.",

keywords = "hollow carbon, nickel selenide, potassium-ion batteries, transition metal chalcogenide, yolk-shell structure",

author = "Min Kim and Park, {Gi Dae} and Kang, {Yun Chan}",

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‐2020R1A4A2002854). Publisher Copyright: {\textcopyright} 2021 John Wiley & Sons Ltd.",

year = "2021",

doi = "10.1002/er.7523",

language = "English",

journal = "International Journal of Energy Research",

issn = "0363-907X",

publisher = "John Wiley and Sons Ltd",

}

TY - JOUR

T1 - Investigation of the potassium-ion storage mechanism of nickel selenide materials and rational design of nickel selenide-C yolk-shell structure for enhancing electrochemical properties

AU - Kim, Min

AU - Park, Gi Dae

AU - Kang, Yun Chan

N1 - 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‐2020R1A4A2002854). Publisher Copyright: © 2021 John Wiley & Sons Ltd.

PY - 2021

Y1 - 2021

N2 - Metal selenide is contemplated as expeditious anode material for potassium-ion batteries (KIBs). Here, nickel selenide (NiSe2-Ni0.85Se) was investigated as an anode material for KIBs. The NiSex transformed into K2Se and K2Se3 (K2Sex) and reversibly returned to NiSex after the discharge and charge processes (17NiSe2 + 3Ni0.85Se + 38 K+ + 38e− ↔ 19.55Ni + 10K2Se + 9K2Se3). Furthermore, to enhance the electrochemical properties of nickel selenide, yolk-shell-structured nickel selenide and hollow carbon nanosphere composites, in which nickel selenides intensively existed in the core and were partially formed into nanocrystals in the shell, were produced by simple salt-infiltration and a post-treatment. NiSex@C exhibited improved cycle and rate properties compared to bare NiSex because of its structural merits that led to stable cycle performance and high electrochemical kinetics. NiSex@C exhibited 373 mA h g−1 for the 100th cycle at 0.05 A g−1 and 234 mA h g−1 at 1.0 A g−1.

AB - Metal selenide is contemplated as expeditious anode material for potassium-ion batteries (KIBs). Here, nickel selenide (NiSe2-Ni0.85Se) was investigated as an anode material for KIBs. The NiSex transformed into K2Se and K2Se3 (K2Sex) and reversibly returned to NiSex after the discharge and charge processes (17NiSe2 + 3Ni0.85Se + 38 K+ + 38e− ↔ 19.55Ni + 10K2Se + 9K2Se3). Furthermore, to enhance the electrochemical properties of nickel selenide, yolk-shell-structured nickel selenide and hollow carbon nanosphere composites, in which nickel selenides intensively existed in the core and were partially formed into nanocrystals in the shell, were produced by simple salt-infiltration and a post-treatment. NiSex@C exhibited improved cycle and rate properties compared to bare NiSex because of its structural merits that led to stable cycle performance and high electrochemical kinetics. NiSex@C exhibited 373 mA h g−1 for the 100th cycle at 0.05 A g−1 and 234 mA h g−1 at 1.0 A g−1.

KW - hollow carbon

KW - nickel selenide

KW - potassium-ion batteries

KW - transition metal chalcogenide

KW - yolk-shell structure

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U2 - 10.1002/er.7523

DO - 10.1002/er.7523

M3 - Article

AN - SCOPUS:85121051139

JO - International Journal of Energy Research

JF - International Journal of Energy Research

SN - 0363-907X

ER -

Investigation of the potassium-ion storage mechanism of nickel selenide materials and rational design of nickel selenide-C yolk-shell structure for enhancing electrochemical properties

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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