Coral-Like Yolk–Shell-Structured Nickel Oxide/Carbon Composite Microspheres for High-Performance Li-Ion Storage Anodes

Min Su Jo, Subrata Ghosh, Sang Mun Jeong, Yun Chan Kang, Jung Sang Cho

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

In this study, coral-like yolk–shell-structured NiO/C composite microspheres (denoted as CYS-NiO/C) were prepared using spray pyrolysis. The unique yolk–shell structure was characterized, and the formation mechanism of the structure was proposed. Both the phase separation of the polyvinylpyrrolidone and polystyrene (PS) colloidal solution and the decomposition of the size-controlled PS nanobeads in the droplet played crucial roles in the formation of the unique coral-like yolk–shell structure. The CYS-NiO/C microspheres delivered a reversible discharge capacity of 991 mAh g −1 after 500 cycles at the current density of 1.0 A g −1 . The discharge capacity of the CYS-NiO/C microspheres after the 1000th cycle at the current density of 2.0 A g −1 was 635 mAh g −1 , and the capacity retention measured from the second cycle was 91%. The final discharge capacities of the CYS-NiO/C microspheres at the current densities of 0.5, 1.5, 3.0, 5.0, 7.0, and 10.0 A g −1 were 753, 648, 560, 490, 440, and 389 mAh g −1 , respectively. The synergetic effect of the coral-like yolk–shell structure with well-defined interconnected mesopores and highly conductive carbon resulted in the excellent Li + -ion storage properties of the CYS-NiO/C microspheres.[Figure not available: see fulltext.].

Original languageEnglish
Article number3
JournalNano-Micro Letters
Volume11
Issue number1
DOIs
Publication statusPublished - 2019 Jan 1

Fingerprint

Nickel oxide
Microspheres
Anodes
Carbon
Ions
Composite materials
Current density
Polystyrenes
Povidone
Spray pyrolysis
Phase separation
nickel monoxide
Decomposition

Keywords

  • Anode materials
  • Carbon composite
  • Lithium-ion batteries
  • Nickel oxide
  • Spray pyrolysis
  • Yolk–shell

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering

Cite this

Coral-Like Yolk–Shell-Structured Nickel Oxide/Carbon Composite Microspheres for High-Performance Li-Ion Storage Anodes. / Jo, Min Su; Ghosh, Subrata; Jeong, Sang Mun; Kang, Yun Chan; Cho, Jung Sang.

In: Nano-Micro Letters, Vol. 11, No. 1, 3, 01.01.2019.

Research output: Contribution to journalArticle

@article{9837870db3e44460a3179954830bca10,
title = "Coral-Like Yolk–Shell-Structured Nickel Oxide/Carbon Composite Microspheres for High-Performance Li-Ion Storage Anodes",
abstract = "In this study, coral-like yolk–shell-structured NiO/C composite microspheres (denoted as CYS-NiO/C) were prepared using spray pyrolysis. The unique yolk–shell structure was characterized, and the formation mechanism of the structure was proposed. Both the phase separation of the polyvinylpyrrolidone and polystyrene (PS) colloidal solution and the decomposition of the size-controlled PS nanobeads in the droplet played crucial roles in the formation of the unique coral-like yolk–shell structure. The CYS-NiO/C microspheres delivered a reversible discharge capacity of 991 mAh g −1 after 500 cycles at the current density of 1.0 A g −1 . The discharge capacity of the CYS-NiO/C microspheres after the 1000th cycle at the current density of 2.0 A g −1 was 635 mAh g −1 , and the capacity retention measured from the second cycle was 91{\%}. The final discharge capacities of the CYS-NiO/C microspheres at the current densities of 0.5, 1.5, 3.0, 5.0, 7.0, and 10.0 A g −1 were 753, 648, 560, 490, 440, and 389 mAh g −1 , respectively. The synergetic effect of the coral-like yolk–shell structure with well-defined interconnected mesopores and highly conductive carbon resulted in the excellent Li + -ion storage properties of the CYS-NiO/C microspheres.[Figure not available: see fulltext.].",
keywords = "Anode materials, Carbon composite, Lithium-ion batteries, Nickel oxide, Spray pyrolysis, Yolk–shell",
author = "Jo, {Min Su} and Subrata Ghosh and Jeong, {Sang Mun} and Kang, {Yun Chan} and Cho, {Jung Sang}",
year = "2019",
month = "1",
day = "1",
doi = "10.1007/s40820-018-0234-0",
language = "English",
volume = "11",
journal = "Nano-Micro Letters",
issn = "2311-6706",
publisher = "Open Access Science Online",
number = "1",

}

TY - JOUR

T1 - Coral-Like Yolk–Shell-Structured Nickel Oxide/Carbon Composite Microspheres for High-Performance Li-Ion Storage Anodes

AU - Jo, Min Su

AU - Ghosh, Subrata

AU - Jeong, Sang Mun

AU - Kang, Yun Chan

AU - Cho, Jung Sang

PY - 2019/1/1

Y1 - 2019/1/1

N2 - In this study, coral-like yolk–shell-structured NiO/C composite microspheres (denoted as CYS-NiO/C) were prepared using spray pyrolysis. The unique yolk–shell structure was characterized, and the formation mechanism of the structure was proposed. Both the phase separation of the polyvinylpyrrolidone and polystyrene (PS) colloidal solution and the decomposition of the size-controlled PS nanobeads in the droplet played crucial roles in the formation of the unique coral-like yolk–shell structure. The CYS-NiO/C microspheres delivered a reversible discharge capacity of 991 mAh g −1 after 500 cycles at the current density of 1.0 A g −1 . The discharge capacity of the CYS-NiO/C microspheres after the 1000th cycle at the current density of 2.0 A g −1 was 635 mAh g −1 , and the capacity retention measured from the second cycle was 91%. The final discharge capacities of the CYS-NiO/C microspheres at the current densities of 0.5, 1.5, 3.0, 5.0, 7.0, and 10.0 A g −1 were 753, 648, 560, 490, 440, and 389 mAh g −1 , respectively. The synergetic effect of the coral-like yolk–shell structure with well-defined interconnected mesopores and highly conductive carbon resulted in the excellent Li + -ion storage properties of the CYS-NiO/C microspheres.[Figure not available: see fulltext.].

AB - In this study, coral-like yolk–shell-structured NiO/C composite microspheres (denoted as CYS-NiO/C) were prepared using spray pyrolysis. The unique yolk–shell structure was characterized, and the formation mechanism of the structure was proposed. Both the phase separation of the polyvinylpyrrolidone and polystyrene (PS) colloidal solution and the decomposition of the size-controlled PS nanobeads in the droplet played crucial roles in the formation of the unique coral-like yolk–shell structure. The CYS-NiO/C microspheres delivered a reversible discharge capacity of 991 mAh g −1 after 500 cycles at the current density of 1.0 A g −1 . The discharge capacity of the CYS-NiO/C microspheres after the 1000th cycle at the current density of 2.0 A g −1 was 635 mAh g −1 , and the capacity retention measured from the second cycle was 91%. The final discharge capacities of the CYS-NiO/C microspheres at the current densities of 0.5, 1.5, 3.0, 5.0, 7.0, and 10.0 A g −1 were 753, 648, 560, 490, 440, and 389 mAh g −1 , respectively. The synergetic effect of the coral-like yolk–shell structure with well-defined interconnected mesopores and highly conductive carbon resulted in the excellent Li + -ion storage properties of the CYS-NiO/C microspheres.[Figure not available: see fulltext.].

KW - Anode materials

KW - Carbon composite

KW - Lithium-ion batteries

KW - Nickel oxide

KW - Spray pyrolysis

KW - Yolk–shell

UR - http://www.scopus.com/inward/record.url?scp=85060132448&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85060132448&partnerID=8YFLogxK

U2 - 10.1007/s40820-018-0234-0

DO - 10.1007/s40820-018-0234-0

M3 - Article

AN - SCOPUS:85060132448

VL - 11

JO - Nano-Micro Letters

JF - Nano-Micro Letters

SN - 2311-6706

IS - 1

M1 - 3

ER -