LiTi2(PO4)3/reduced graphene oxide nanocomposite with enhanced electrochemical performance for lithium-ion batteries

Ha Kyung Roh, Hyun Kyung Kim, Kwang Chul Roh, Kwang Bum Kim

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

An LiTi2(PO4)3/reduced graphene oxide (rGO) nanocomposite with a NASICON-type structure was synthesized using a simple microwave-assisted one-pot method followed by calcination. The LiTi 2(PO4)3 nanoparticles were uniformly deposited on rGO substrates, and the size of LiTi2(PO4)3 particles in the composite was 30-40 nm. Electrodes prepared from the nanocomposite delivered a reversible capacity of 138 mA h g-1 at a 0.1 C-rate and the apparent diffusion coefficient of Li+ in the anode, as calculated from the cyclic voltammetry curves, is 1.55 × 10 -14 cm2 s-1. The electrode exhibited good charge/discharge cycling stability, retaining over 93.2% of its initial capacity after 100 cycles at 1 C-rate and reaching a coulombic efficiency of approximately 99.8%. This excellent cycle stability is further confirmed by TEM analysis, which reveals that almost all of the LiTi2(PO 4)3 nanoparticles remain unchanged after 200 cycles.

Original languageEnglish
Pages (from-to)31672-31677
Number of pages6
JournalRSC Advances
Volume4
Issue number60
DOIs
Publication statusPublished - 2014 Jan 1

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Oxides
Graphene
Nanocomposites
Nanoparticles
Electrodes
Calcination
Cyclic voltammetry
Anodes
Microwaves
Transmission electron microscopy
Composite materials
Substrates
Lithium-ion batteries

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Roh, Ha Kyung ; Kim, Hyun Kyung ; Roh, Kwang Chul ; Kim, Kwang Bum. / LiTi2(PO4)3/reduced graphene oxide nanocomposite with enhanced electrochemical performance for lithium-ion batteries. In: RSC Advances. 2014 ; Vol. 4, No. 60. pp. 31672-31677.
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LiTi2(PO4)3/reduced graphene oxide nanocomposite with enhanced electrochemical performance for lithium-ion batteries. / Roh, Ha Kyung; Kim, Hyun Kyung; Roh, Kwang Chul; Kim, Kwang Bum.

In: RSC Advances, Vol. 4, No. 60, 01.01.2014, p. 31672-31677.

Research output: Contribution to journalArticle

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