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

doi:10.1039/c4ra04943h

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

26 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 language	English
Pages (from-to)	31672-31677
Number of pages	6
Journal	RSC Advances
Volume	4
Issue number	60
DOIs	https://doi.org/10.1039/c4ra04943h
Publication status	Published - 2014

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1039/c4ra04943h

Cite this

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

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.",

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T1 - LiTi2(PO4)3/reduced graphene oxide nanocomposite with enhanced electrochemical performance for lithium-ion batteries

AU - Roh, Ha Kyung

AU - Kim, Hyun Kyung

AU - Roh, Kwang Chul

AU - Kim, Kwang Bum

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

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