Capacitive properties of reduced graphene oxide microspheres with uniformly dispersed nickel sulfide nanocrystals prepared by spray pyrolysis

Su Min Lee, You Na Ko, Seung Ho Choi, Jong Hwa Kim, Yun Chan Kang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Nickel sulfide-reduced graphene oxide (RGO) composite powders with spherical shapes are prepared by a one-pot spray pyrolysis process. The optimum mole ratio of nickel nitrate and thiourea to obtain nickel sulfide-RGO composite powders with high initial capacities and good cycling performance is 1:8. The bare nickel sulfide and nickel sulfide-RGO composite powders prepared directly by spray pyrolysis have mixed crystal structures of hexagonal α-NiS and cubic Ni 3 S 4 phases. The bare nickel sulfide powders are prepared from the spray solution without graphene oxide sheets. The nickel sulfide-RGO composite powders have sharp mesopores approximately 3.5 nm in size. The discharge capacities of the nickel sulfide-RGO composite powders for the 1st and 200th cycles at a current density of 1000 mA g -1 are 1046 and 614 mA h g -1 , respectively, and the corresponding capacity retention measured from the second cycle is 89%. However, the discharge capacities of the bare nickel sulfide powders for the 1st and 200th cycles at a current density of 1000 mA g -1 are 832 and 16 mA h g -1 , respectively. The electrochemical impedance spectroscopy (EIS) measurements reveal the high structural stability of the nickel sulfide-RGO composite powders during cycling.

Original languageEnglish
Pages (from-to)287-293
Number of pages7
JournalElectrochimica Acta
Volume167
DOIs
Publication statusPublished - 2015 Jun 10

Fingerprint

Spray pyrolysis
Graphite
Microspheres
Nanocrystals
Oxides
Graphene
Powders
Nickel
Composite materials
Current density
nickel sulfide
Sulfides
Thiourea
Thioureas
Electrochemical impedance spectroscopy
Nitrates
Crystal structure

Keywords

  • anode material
  • graphene composite
  • lithium ion battery
  • nickel sulfide
  • spray pyrolysis

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

Capacitive properties of reduced graphene oxide microspheres with uniformly dispersed nickel sulfide nanocrystals prepared by spray pyrolysis. / Lee, Su Min; Ko, You Na; Choi, Seung Ho; Kim, Jong Hwa; Kang, Yun Chan.

In: Electrochimica Acta, Vol. 167, 10.06.2015, p. 287-293.

Research output: Contribution to journalArticle

@article{b01e179d59394d8ea7021d6a78e24aa7,
title = "Capacitive properties of reduced graphene oxide microspheres with uniformly dispersed nickel sulfide nanocrystals prepared by spray pyrolysis",
abstract = "Nickel sulfide-reduced graphene oxide (RGO) composite powders with spherical shapes are prepared by a one-pot spray pyrolysis process. The optimum mole ratio of nickel nitrate and thiourea to obtain nickel sulfide-RGO composite powders with high initial capacities and good cycling performance is 1:8. The bare nickel sulfide and nickel sulfide-RGO composite powders prepared directly by spray pyrolysis have mixed crystal structures of hexagonal α-NiS and cubic Ni 3 S 4 phases. The bare nickel sulfide powders are prepared from the spray solution without graphene oxide sheets. The nickel sulfide-RGO composite powders have sharp mesopores approximately 3.5 nm in size. The discharge capacities of the nickel sulfide-RGO composite powders for the 1st and 200th cycles at a current density of 1000 mA g -1 are 1046 and 614 mA h g -1 , respectively, and the corresponding capacity retention measured from the second cycle is 89{\%}. However, the discharge capacities of the bare nickel sulfide powders for the 1st and 200th cycles at a current density of 1000 mA g -1 are 832 and 16 mA h g -1 , respectively. The electrochemical impedance spectroscopy (EIS) measurements reveal the high structural stability of the nickel sulfide-RGO composite powders during cycling.",
keywords = "anode material, graphene composite, lithium ion battery, nickel sulfide, spray pyrolysis",
author = "Lee, {Su Min} and Ko, {You Na} and Choi, {Seung Ho} and Kim, {Jong Hwa} and Kang, {Yun Chan}",
year = "2015",
month = "6",
day = "10",
doi = "10.1016/j.electacta.2015.03.196",
language = "English",
volume = "167",
pages = "287--293",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Capacitive properties of reduced graphene oxide microspheres with uniformly dispersed nickel sulfide nanocrystals prepared by spray pyrolysis

AU - Lee, Su Min

AU - Ko, You Na

AU - Choi, Seung Ho

AU - Kim, Jong Hwa

AU - Kang, Yun Chan

PY - 2015/6/10

Y1 - 2015/6/10

N2 - Nickel sulfide-reduced graphene oxide (RGO) composite powders with spherical shapes are prepared by a one-pot spray pyrolysis process. The optimum mole ratio of nickel nitrate and thiourea to obtain nickel sulfide-RGO composite powders with high initial capacities and good cycling performance is 1:8. The bare nickel sulfide and nickel sulfide-RGO composite powders prepared directly by spray pyrolysis have mixed crystal structures of hexagonal α-NiS and cubic Ni 3 S 4 phases. The bare nickel sulfide powders are prepared from the spray solution without graphene oxide sheets. The nickel sulfide-RGO composite powders have sharp mesopores approximately 3.5 nm in size. The discharge capacities of the nickel sulfide-RGO composite powders for the 1st and 200th cycles at a current density of 1000 mA g -1 are 1046 and 614 mA h g -1 , respectively, and the corresponding capacity retention measured from the second cycle is 89%. However, the discharge capacities of the bare nickel sulfide powders for the 1st and 200th cycles at a current density of 1000 mA g -1 are 832 and 16 mA h g -1 , respectively. The electrochemical impedance spectroscopy (EIS) measurements reveal the high structural stability of the nickel sulfide-RGO composite powders during cycling.

AB - Nickel sulfide-reduced graphene oxide (RGO) composite powders with spherical shapes are prepared by a one-pot spray pyrolysis process. The optimum mole ratio of nickel nitrate and thiourea to obtain nickel sulfide-RGO composite powders with high initial capacities and good cycling performance is 1:8. The bare nickel sulfide and nickel sulfide-RGO composite powders prepared directly by spray pyrolysis have mixed crystal structures of hexagonal α-NiS and cubic Ni 3 S 4 phases. The bare nickel sulfide powders are prepared from the spray solution without graphene oxide sheets. The nickel sulfide-RGO composite powders have sharp mesopores approximately 3.5 nm in size. The discharge capacities of the nickel sulfide-RGO composite powders for the 1st and 200th cycles at a current density of 1000 mA g -1 are 1046 and 614 mA h g -1 , respectively, and the corresponding capacity retention measured from the second cycle is 89%. However, the discharge capacities of the bare nickel sulfide powders for the 1st and 200th cycles at a current density of 1000 mA g -1 are 832 and 16 mA h g -1 , respectively. The electrochemical impedance spectroscopy (EIS) measurements reveal the high structural stability of the nickel sulfide-RGO composite powders during cycling.

KW - anode material

KW - graphene composite

KW - lithium ion battery

KW - nickel sulfide

KW - spray pyrolysis

UR - http://www.scopus.com/inward/record.url?scp=84961292139&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84961292139&partnerID=8YFLogxK

U2 - 10.1016/j.electacta.2015.03.196

DO - 10.1016/j.electacta.2015.03.196

M3 - Article

AN - SCOPUS:84961292139

VL - 167

SP - 287

EP - 293

JO - Electrochimica Acta

JF - Electrochimica Acta

SN - 0013-4686

ER -