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 journalArticlepeer-review

21 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

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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