Rapid Synthetic Route to Nanocrystalline Carbon-Mixed Metal Oxide Nanocomposites with Enhanced Electrode Functionality

Jang Mee Lee, Tae Ha Gu, Nam Hee Kwon, Seung Mi Oh, Seong Ju Hwang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A rapid synthetic route to nanocrystalline carbon-incorporated mixed metal oxide nanocomposites with enhanced electrode performance for lithium ion batteries is developed by applying a very short heat-treatment of layered double hydroxide (LDH) precursor under C2H2 flow. Employing C2H2 atmosphere makes possible the rapid synthesis of nanocrystalline C-NiO-NiFe2O4 nanocomposite via the calcination of the Ni-Fe-LDH precursor at 300 °C in a very short period of 5 min. In the case of ambient atmosphere, a prolonged calcination time of several hours is demanded to induce a complete phase transformation from Ni-Fe-LDH to electrochemically active NiO-NiFe2O4 nanocomposite, highlighting the usefulness of C2H2 atmosphere in promoting the formation of mixed metal oxide nanocomposite. The present C-NiO-NiFe2O4 nanocomposite shows much better anode performance for lithium ion batteries with greater discharge capacity and better cyclability than do the NiO-NiFe2O4 nanocomposites prepared by the prolonged calcination of LDH under ambient atmosphere. The superior electrode activity of the present C-NiO-NiFe2O4 nanocomposite is attributable to the optimization of charge transfer induced by the enhanced electrical conductivity and a short diffusion length of Li ion. The present C2H2-assisted phase transition of LDH precursor provides a convenient, economic, and scalable synthetic way to carbon-mixed metal oxide nanocomposites with promising electrode performance for lithium ion batteries.

Original languageEnglish
Pages (from-to)8451-8460
Number of pages10
JournalJournal of Physical Chemistry C
Volume120
Issue number16
DOIs
Publication statusPublished - 2016 Apr 28

Fingerprint

mixed oxides
Oxides
metal oxides
Nanocomposites
nanocomposites
Carbon
Metals
routes
Electrodes
electrodes
carbon
hydroxides
Calcination
roasting
electric batteries
atmospheres
lithium
ions
Phase transitions
diffusion length

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

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title = "Rapid Synthetic Route to Nanocrystalline Carbon-Mixed Metal Oxide Nanocomposites with Enhanced Electrode Functionality",
abstract = "A rapid synthetic route to nanocrystalline carbon-incorporated mixed metal oxide nanocomposites with enhanced electrode performance for lithium ion batteries is developed by applying a very short heat-treatment of layered double hydroxide (LDH) precursor under C2H2 flow. Employing C2H2 atmosphere makes possible the rapid synthesis of nanocrystalline C-NiO-NiFe2O4 nanocomposite via the calcination of the Ni-Fe-LDH precursor at 300 °C in a very short period of 5 min. In the case of ambient atmosphere, a prolonged calcination time of several hours is demanded to induce a complete phase transformation from Ni-Fe-LDH to electrochemically active NiO-NiFe2O4 nanocomposite, highlighting the usefulness of C2H2 atmosphere in promoting the formation of mixed metal oxide nanocomposite. The present C-NiO-NiFe2O4 nanocomposite shows much better anode performance for lithium ion batteries with greater discharge capacity and better cyclability than do the NiO-NiFe2O4 nanocomposites prepared by the prolonged calcination of LDH under ambient atmosphere. The superior electrode activity of the present C-NiO-NiFe2O4 nanocomposite is attributable to the optimization of charge transfer induced by the enhanced electrical conductivity and a short diffusion length of Li ion. The present C2H2-assisted phase transition of LDH precursor provides a convenient, economic, and scalable synthetic way to carbon-mixed metal oxide nanocomposites with promising electrode performance for lithium ion batteries.",
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Rapid Synthetic Route to Nanocrystalline Carbon-Mixed Metal Oxide Nanocomposites with Enhanced Electrode Functionality. / Lee, Jang Mee; Gu, Tae Ha; Kwon, Nam Hee; Oh, Seung Mi; Hwang, Seong Ju.

In: Journal of Physical Chemistry C, Vol. 120, No. 16, 28.04.2016, p. 8451-8460.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Rapid Synthetic Route to Nanocrystalline Carbon-Mixed Metal Oxide Nanocomposites with Enhanced Electrode Functionality

AU - Lee, Jang Mee

AU - Gu, Tae Ha

AU - Kwon, Nam Hee

AU - Oh, Seung Mi

AU - Hwang, Seong Ju

PY - 2016/4/28

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AB - A rapid synthetic route to nanocrystalline carbon-incorporated mixed metal oxide nanocomposites with enhanced electrode performance for lithium ion batteries is developed by applying a very short heat-treatment of layered double hydroxide (LDH) precursor under C2H2 flow. Employing C2H2 atmosphere makes possible the rapid synthesis of nanocrystalline C-NiO-NiFe2O4 nanocomposite via the calcination of the Ni-Fe-LDH precursor at 300 °C in a very short period of 5 min. In the case of ambient atmosphere, a prolonged calcination time of several hours is demanded to induce a complete phase transformation from Ni-Fe-LDH to electrochemically active NiO-NiFe2O4 nanocomposite, highlighting the usefulness of C2H2 atmosphere in promoting the formation of mixed metal oxide nanocomposite. The present C-NiO-NiFe2O4 nanocomposite shows much better anode performance for lithium ion batteries with greater discharge capacity and better cyclability than do the NiO-NiFe2O4 nanocomposites prepared by the prolonged calcination of LDH under ambient atmosphere. The superior electrode activity of the present C-NiO-NiFe2O4 nanocomposite is attributable to the optimization of charge transfer induced by the enhanced electrical conductivity and a short diffusion length of Li ion. The present C2H2-assisted phase transition of LDH precursor provides a convenient, economic, and scalable synthetic way to carbon-mixed metal oxide nanocomposites with promising electrode performance for lithium ion batteries.

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