Facile synthesis of cauliflower-like cobalt-doped Ni3Se2 nanostructures as high-performance cathode materials for aqueous zinc-ion batteries

D. Amaranatha Reddy, Hwan Lee, Madhusudana Gopannagari, D. Praveen Kumar, Kiyoung Kwon, Hyun Deog Yoo, Tae Kyu Kim

Research output: Contribution to journalArticle

Abstract

Ni3Se2 and Co-doped Ni3Se2 cauliflower-like nanostructures are synthesized using a simple and feasible electrochemical deposition technique. Electrochemical measurements of the resultant nanostructures in 1 M KOH electrolyte solution revealed that the energy storage performance of the cauliflower-like Ni3Se2 nanostructures was considerably improved by cobalt doping. Particularly, 6 wt% Co-doped Ni3Se2 electrodes exhibited remarkable high specific capacity (179.34 mAh g−1) and excellent stability with capacity retention of 85.9% over 1000 cycles because of their high electrical conductivity. Furthermore, to verify the feasibility of the optimized Co-doped Ni3Se2 electrodes for practical applications, Zn ion batteries were constructed by using a Zn plate as the anode and the Co-doped Ni3Se2 nanostructures as the cathode. The constructed Zn ion battery achieved high energy and power densities of 199.34 W h kg−1 and 24,510 W kg−1 at the current densities of 1 and 20 A g−1, respectively. In addition, up to 2.2 electrons per formula unit of Ni3Se2 were successfully utilized, indicating considerably higher utilization of Ni2+/Ni3+ redox sites by Co doping the selenite. This work demonstrated an effectual strategy for rational design of highly robust, low-cost flexible electrodes for energy storage devices.

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusAccepted/In press - 2019 Jan 1

Fingerprint

electric batteries
Cobalt
Nanostructures
Cathodes
Zinc
cobalt
zinc
cathodes
energy storage
electrodes
Ions
synthesis
Energy storage
Electrodes
ions
Doping (additives)
radiant flux density
anodes
flux density
electrolytes

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

@article{b097dae371d44bf78fd4a8d3cf3619fd,
title = "Facile synthesis of cauliflower-like cobalt-doped Ni3Se2 nanostructures as high-performance cathode materials for aqueous zinc-ion batteries",
abstract = "Ni3Se2 and Co-doped Ni3Se2 cauliflower-like nanostructures are synthesized using a simple and feasible electrochemical deposition technique. Electrochemical measurements of the resultant nanostructures in 1 M KOH electrolyte solution revealed that the energy storage performance of the cauliflower-like Ni3Se2 nanostructures was considerably improved by cobalt doping. Particularly, 6 wt{\%} Co-doped Ni3Se2 electrodes exhibited remarkable high specific capacity (179.34 mAh g−1) and excellent stability with capacity retention of 85.9{\%} over 1000 cycles because of their high electrical conductivity. Furthermore, to verify the feasibility of the optimized Co-doped Ni3Se2 electrodes for practical applications, Zn ion batteries were constructed by using a Zn plate as the anode and the Co-doped Ni3Se2 nanostructures as the cathode. The constructed Zn ion battery achieved high energy and power densities of 199.34 W h kg−1 and 24,510 W kg−1 at the current densities of 1 and 20 A g−1, respectively. In addition, up to 2.2 electrons per formula unit of Ni3Se2 were successfully utilized, indicating considerably higher utilization of Ni2+/Ni3+ redox sites by Co doping the selenite. This work demonstrated an effectual strategy for rational design of highly robust, low-cost flexible electrodes for energy storage devices.",
author = "{Amaranatha Reddy}, D. and Hwan Lee and Madhusudana Gopannagari and {Praveen Kumar}, D. and Kiyoung Kwon and Yoo, {Hyun Deog} and Kim, {Tae Kyu}",
year = "2019",
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doi = "10.1016/j.ijhydene.2019.06.004",
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Facile synthesis of cauliflower-like cobalt-doped Ni3Se2 nanostructures as high-performance cathode materials for aqueous zinc-ion batteries. / Amaranatha Reddy, D.; Lee, Hwan; Gopannagari, Madhusudana; Praveen Kumar, D.; Kwon, Kiyoung; Yoo, Hyun Deog; Kim, Tae Kyu.

In: International Journal of Hydrogen Energy, 01.01.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Facile synthesis of cauliflower-like cobalt-doped Ni3Se2 nanostructures as high-performance cathode materials for aqueous zinc-ion batteries

AU - Amaranatha Reddy, D.

AU - Lee, Hwan

AU - Gopannagari, Madhusudana

AU - Praveen Kumar, D.

AU - Kwon, Kiyoung

AU - Yoo, Hyun Deog

AU - Kim, Tae Kyu

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Ni3Se2 and Co-doped Ni3Se2 cauliflower-like nanostructures are synthesized using a simple and feasible electrochemical deposition technique. Electrochemical measurements of the resultant nanostructures in 1 M KOH electrolyte solution revealed that the energy storage performance of the cauliflower-like Ni3Se2 nanostructures was considerably improved by cobalt doping. Particularly, 6 wt% Co-doped Ni3Se2 electrodes exhibited remarkable high specific capacity (179.34 mAh g−1) and excellent stability with capacity retention of 85.9% over 1000 cycles because of their high electrical conductivity. Furthermore, to verify the feasibility of the optimized Co-doped Ni3Se2 electrodes for practical applications, Zn ion batteries were constructed by using a Zn plate as the anode and the Co-doped Ni3Se2 nanostructures as the cathode. The constructed Zn ion battery achieved high energy and power densities of 199.34 W h kg−1 and 24,510 W kg−1 at the current densities of 1 and 20 A g−1, respectively. In addition, up to 2.2 electrons per formula unit of Ni3Se2 were successfully utilized, indicating considerably higher utilization of Ni2+/Ni3+ redox sites by Co doping the selenite. This work demonstrated an effectual strategy for rational design of highly robust, low-cost flexible electrodes for energy storage devices.

AB - Ni3Se2 and Co-doped Ni3Se2 cauliflower-like nanostructures are synthesized using a simple and feasible electrochemical deposition technique. Electrochemical measurements of the resultant nanostructures in 1 M KOH electrolyte solution revealed that the energy storage performance of the cauliflower-like Ni3Se2 nanostructures was considerably improved by cobalt doping. Particularly, 6 wt% Co-doped Ni3Se2 electrodes exhibited remarkable high specific capacity (179.34 mAh g−1) and excellent stability with capacity retention of 85.9% over 1000 cycles because of their high electrical conductivity. Furthermore, to verify the feasibility of the optimized Co-doped Ni3Se2 electrodes for practical applications, Zn ion batteries were constructed by using a Zn plate as the anode and the Co-doped Ni3Se2 nanostructures as the cathode. The constructed Zn ion battery achieved high energy and power densities of 199.34 W h kg−1 and 24,510 W kg−1 at the current densities of 1 and 20 A g−1, respectively. In addition, up to 2.2 electrons per formula unit of Ni3Se2 were successfully utilized, indicating considerably higher utilization of Ni2+/Ni3+ redox sites by Co doping the selenite. This work demonstrated an effectual strategy for rational design of highly robust, low-cost flexible electrodes for energy storage devices.

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