Design and Synthesis of Spherical Multicomponent Aggregates Composed of Core–Shell, Yolk–Shell, and Hollow Nanospheres and Their Lithium-Ion Storage Performances

Gi Dae Park, Yun Chan Kang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Micrometer-sized spherical aggregates of Sn and Co components containing core–shell, yolk–shell, hollow nanospheres are synthesized by applying nanoscale Kirkendall diffusion in the large-scale spray drying process. The Sn2Co3–Co3SnC0.7–C composite microspheres uniformly dispersed with Sn2Co3–Co3SnC0.7 mixed nanocrystals are formed by the first-step reduction of spray-dried precursor powders at 900 °C. The second-step oxidation process transforms the Sn2Co3–Co3SnC0.7–C composite into the porous microsphere composed of Sn–Sn2Co3@CoSnO3–Co3O4 core–shell, Sn–Sn2Co3@CoSnO3–Co3O4 yolk–shell, and CoSnO3–Co3O4 hollow nanospheres at 300, 400, and 500 °C, respectively. The discharge capacity of the microspheres with Sn–Sn2Co3@CoSnO3–Co3O4 core–shell, Sn-Sn2Co3@CoSnO3–Co3O4 yolk–shell, and CoSnO3–Co3O4 hollow nanospheres for the 200th cycle at a current density of 1 A g−1 is 1265, 987, and 569 mA h g−1, respectively. The ultrafine primary nanoparticles with a core–shell structure improve the structural stability of the porous-structured microspheres during repeated lithium insertion and desertion processes. The porous Sn–Sn2Co3@CoSnO3–Co3O4 microspheres with core–shell primary nanoparticles show excellent cycling and rate performances as anode materials for lithium-ion batteries.

Original languageEnglish
Article number1703957
JournalSmall
Volume14
Issue number13
DOIs
Publication statusPublished - 2018 Mar 27

Fingerprint

Nanospheres
Microspheres
Lithium
Ions
Nanoparticles
Spray drying
Composite materials
Powders
Nanocrystals
Anodes
Electrodes
Current density
Oxidation

Keywords

  • core–shell
  • Kirkendall diffusion
  • lithium-ion battery
  • spray drying
  • yolk–shell

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

Cite this

@article{719556314adf454eb09ed51ba5e52b33,
title = "Design and Synthesis of Spherical Multicomponent Aggregates Composed of Core–Shell, Yolk–Shell, and Hollow Nanospheres and Their Lithium-Ion Storage Performances",
abstract = "Micrometer-sized spherical aggregates of Sn and Co components containing core–shell, yolk–shell, hollow nanospheres are synthesized by applying nanoscale Kirkendall diffusion in the large-scale spray drying process. The Sn2Co3–Co3SnC0.7–C composite microspheres uniformly dispersed with Sn2Co3–Co3SnC0.7 mixed nanocrystals are formed by the first-step reduction of spray-dried precursor powders at 900 °C. The second-step oxidation process transforms the Sn2Co3–Co3SnC0.7–C composite into the porous microsphere composed of Sn–Sn2Co3@CoSnO3–Co3O4 core–shell, Sn–Sn2Co3@CoSnO3–Co3O4 yolk–shell, and CoSnO3–Co3O4 hollow nanospheres at 300, 400, and 500 °C, respectively. The discharge capacity of the microspheres with Sn–Sn2Co3@CoSnO3–Co3O4 core–shell, Sn-Sn2Co3@CoSnO3–Co3O4 yolk–shell, and CoSnO3–Co3O4 hollow nanospheres for the 200th cycle at a current density of 1 A g−1 is 1265, 987, and 569 mA h g−1, respectively. The ultrafine primary nanoparticles with a core–shell structure improve the structural stability of the porous-structured microspheres during repeated lithium insertion and desertion processes. The porous Sn–Sn2Co3@CoSnO3–Co3O4 microspheres with core–shell primary nanoparticles show excellent cycling and rate performances as anode materials for lithium-ion batteries.",
keywords = "core–shell, Kirkendall diffusion, lithium-ion battery, spray drying, yolk–shell",
author = "Park, {Gi Dae} and Kang, {Yun Chan}",
year = "2018",
month = "3",
day = "27",
doi = "10.1002/smll.201703957",
language = "English",
volume = "14",
journal = "Small",
issn = "1613-6810",
publisher = "Wiley-VCH Verlag",
number = "13",

}

TY - JOUR

T1 - Design and Synthesis of Spherical Multicomponent Aggregates Composed of Core–Shell, Yolk–Shell, and Hollow Nanospheres and Their Lithium-Ion Storage Performances

AU - Park, Gi Dae

AU - Kang, Yun Chan

PY - 2018/3/27

Y1 - 2018/3/27

N2 - Micrometer-sized spherical aggregates of Sn and Co components containing core–shell, yolk–shell, hollow nanospheres are synthesized by applying nanoscale Kirkendall diffusion in the large-scale spray drying process. The Sn2Co3–Co3SnC0.7–C composite microspheres uniformly dispersed with Sn2Co3–Co3SnC0.7 mixed nanocrystals are formed by the first-step reduction of spray-dried precursor powders at 900 °C. The second-step oxidation process transforms the Sn2Co3–Co3SnC0.7–C composite into the porous microsphere composed of Sn–Sn2Co3@CoSnO3–Co3O4 core–shell, Sn–Sn2Co3@CoSnO3–Co3O4 yolk–shell, and CoSnO3–Co3O4 hollow nanospheres at 300, 400, and 500 °C, respectively. The discharge capacity of the microspheres with Sn–Sn2Co3@CoSnO3–Co3O4 core–shell, Sn-Sn2Co3@CoSnO3–Co3O4 yolk–shell, and CoSnO3–Co3O4 hollow nanospheres for the 200th cycle at a current density of 1 A g−1 is 1265, 987, and 569 mA h g−1, respectively. The ultrafine primary nanoparticles with a core–shell structure improve the structural stability of the porous-structured microspheres during repeated lithium insertion and desertion processes. The porous Sn–Sn2Co3@CoSnO3–Co3O4 microspheres with core–shell primary nanoparticles show excellent cycling and rate performances as anode materials for lithium-ion batteries.

AB - Micrometer-sized spherical aggregates of Sn and Co components containing core–shell, yolk–shell, hollow nanospheres are synthesized by applying nanoscale Kirkendall diffusion in the large-scale spray drying process. The Sn2Co3–Co3SnC0.7–C composite microspheres uniformly dispersed with Sn2Co3–Co3SnC0.7 mixed nanocrystals are formed by the first-step reduction of spray-dried precursor powders at 900 °C. The second-step oxidation process transforms the Sn2Co3–Co3SnC0.7–C composite into the porous microsphere composed of Sn–Sn2Co3@CoSnO3–Co3O4 core–shell, Sn–Sn2Co3@CoSnO3–Co3O4 yolk–shell, and CoSnO3–Co3O4 hollow nanospheres at 300, 400, and 500 °C, respectively. The discharge capacity of the microspheres with Sn–Sn2Co3@CoSnO3–Co3O4 core–shell, Sn-Sn2Co3@CoSnO3–Co3O4 yolk–shell, and CoSnO3–Co3O4 hollow nanospheres for the 200th cycle at a current density of 1 A g−1 is 1265, 987, and 569 mA h g−1, respectively. The ultrafine primary nanoparticles with a core–shell structure improve the structural stability of the porous-structured microspheres during repeated lithium insertion and desertion processes. The porous Sn–Sn2Co3@CoSnO3–Co3O4 microspheres with core–shell primary nanoparticles show excellent cycling and rate performances as anode materials for lithium-ion batteries.

KW - core–shell

KW - Kirkendall diffusion

KW - lithium-ion battery

KW - spray drying

KW - yolk–shell

UR - http://www.scopus.com/inward/record.url?scp=85041798011&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85041798011&partnerID=8YFLogxK

U2 - 10.1002/smll.201703957

DO - 10.1002/smll.201703957

M3 - Article

C2 - 29430830

AN - SCOPUS:85041798011

VL - 14

JO - Small

JF - Small

SN - 1613-6810

IS - 13

M1 - 1703957

ER -