Revisiting NaTi2(PO4)3/nanocarbon composites prepared using nanocarbons with different dimensions for high-rate sodium-ion batteries: The surface properties of nanocarbons

Ha Kyung Roh, Geon Woo Lee, Kyung Yoon Chung, Kwang Bum Kim

Research output: Contribution to journalArticle

Abstract

In this study, we intend to revisit oxide/nanocarbon composites for a systematic study of oxide particle size, chemical bonding between oxide and carbon, electrical conductivity and ion transport in the composites on the electrochemical properties of NaTi2(PO4)3@nanocarbon microsphere composites prepared using zero-dimensional carbon black, one-dimensional carbon nanotubes, and two-dimensional graphene as anode materials for high-rate sodium-ion batteries. In the solution-based synthesis of the composites, oxide precursor nanoparticles deposited on nanocarbons are converted into final oxide nanoparticles through heat treatment. We demonstrate that growth of the NaTi2(PO4)3 particles in the NaTi2(PO4)3@nanocarbon composites occurs during heat treatment when the concentration of oxygen functional groups per unit specific area of nanocarbons is high. Growth of oxide precursor nanoparticles is observed for carbon black with a high concentration of oxygen functional groups during heat treatment owing to the proximity between precursor particles. On the other hand, growth of precursor nanoparticles is effectively prevented for carbon nanotubes and graphene with a low concentration of oxygen functional groups. Rate capability increases in the order of NaTi2(PO4)3@carbon black < NaTi2(PO4)3@graphene < NaTi2(PO4)3@carbon nanotubes mainly due to the smaller sizes of oxide particles and more efficient Na+ transport across carbon nanotubes compared to other nanocarbons.

Original languageEnglish
Pages (from-to)728-737
Number of pages10
JournalJournal of Alloys and Compounds
Volume787
DOIs
Publication statusPublished - 2019 May 30

Fingerprint

Oxides
Surface properties
Sodium
Ions
Carbon Nanotubes
Soot
Composite materials
Graphite
Carbon nanotubes
Carbon black
Graphene
Functional groups
Nanoparticles
Heat treatment
Oxygen
NaTi2(PO4)3
Microspheres
Electrochemical properties
Anodes
Carbon

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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title = "Revisiting NaTi2(PO4)3/nanocarbon composites prepared using nanocarbons with different dimensions for high-rate sodium-ion batteries: The surface properties of nanocarbons",
abstract = "In this study, we intend to revisit oxide/nanocarbon composites for a systematic study of oxide particle size, chemical bonding between oxide and carbon, electrical conductivity and ion transport in the composites on the electrochemical properties of NaTi2(PO4)3@nanocarbon microsphere composites prepared using zero-dimensional carbon black, one-dimensional carbon nanotubes, and two-dimensional graphene as anode materials for high-rate sodium-ion batteries. In the solution-based synthesis of the composites, oxide precursor nanoparticles deposited on nanocarbons are converted into final oxide nanoparticles through heat treatment. We demonstrate that growth of the NaTi2(PO4)3 particles in the NaTi2(PO4)3@nanocarbon composites occurs during heat treatment when the concentration of oxygen functional groups per unit specific area of nanocarbons is high. Growth of oxide precursor nanoparticles is observed for carbon black with a high concentration of oxygen functional groups during heat treatment owing to the proximity between precursor particles. On the other hand, growth of precursor nanoparticles is effectively prevented for carbon nanotubes and graphene with a low concentration of oxygen functional groups. Rate capability increases in the order of NaTi2(PO4)3@carbon black < NaTi2(PO4)3@graphene < NaTi2(PO4)3@carbon nanotubes mainly due to the smaller sizes of oxide particles and more efficient Na+ transport across carbon nanotubes compared to other nanocarbons.",
author = "Roh, {Ha Kyung} and Lee, {Geon Woo} and Chung, {Kyung Yoon} and Kim, {Kwang Bum}",
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T1 - Revisiting NaTi2(PO4)3/nanocarbon composites prepared using nanocarbons with different dimensions for high-rate sodium-ion batteries

T2 - The surface properties of nanocarbons

AU - Roh, Ha Kyung

AU - Lee, Geon Woo

AU - Chung, Kyung Yoon

AU - Kim, Kwang Bum

PY - 2019/5/30

Y1 - 2019/5/30

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AB - In this study, we intend to revisit oxide/nanocarbon composites for a systematic study of oxide particle size, chemical bonding between oxide and carbon, electrical conductivity and ion transport in the composites on the electrochemical properties of NaTi2(PO4)3@nanocarbon microsphere composites prepared using zero-dimensional carbon black, one-dimensional carbon nanotubes, and two-dimensional graphene as anode materials for high-rate sodium-ion batteries. In the solution-based synthesis of the composites, oxide precursor nanoparticles deposited on nanocarbons are converted into final oxide nanoparticles through heat treatment. We demonstrate that growth of the NaTi2(PO4)3 particles in the NaTi2(PO4)3@nanocarbon composites occurs during heat treatment when the concentration of oxygen functional groups per unit specific area of nanocarbons is high. Growth of oxide precursor nanoparticles is observed for carbon black with a high concentration of oxygen functional groups during heat treatment owing to the proximity between precursor particles. On the other hand, growth of precursor nanoparticles is effectively prevented for carbon nanotubes and graphene with a low concentration of oxygen functional groups. Rate capability increases in the order of NaTi2(PO4)3@carbon black < NaTi2(PO4)3@graphene < NaTi2(PO4)3@carbon nanotubes mainly due to the smaller sizes of oxide particles and more efficient Na+ transport across carbon nanotubes compared to other nanocarbons.

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