A chemically bonded NaTi2(PO4)3/rGO microsphere composite as a high-rate insertion anode for sodium-ion capacitors

Ha Kyung Roh; Myeong Seong Kim; Kyung Yoon Chung; Mani Ulaganathan; Vanchiappan Aravindan; Srinivasan Madhavi; Kwang Chul Roh; Kwang Bum Kim

doi:10.1039/c7ta05252a

A chemically bonded NaTi₂(PO₄)₃/rGO microsphere composite as a high-rate insertion anode for sodium-ion capacitors

Ha Kyung Roh, Myeong Seong Kim, Kyung Yoon Chung, Mani Ulaganathan, Vanchiappan Aravindan, Srinivasan Madhavi, Kwang Chul Roh, Kwang Bum Kim

Department of Materials Science and Engineering

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

78 Citations (Scopus)

Abstract

We report on the synthesis of a high rate NaTi₂(PO₄)₃/graphene composite for use as an anode material for high power Na-ion hybrid capacitors with the following characteristics; (1) reduction of the particle size of NaTi₂(PO₄)₃ to the nanometer scale in order to reduce the Na⁺ ion diffusion length, (2) chemical bonding between NaTi₂(PO₄)₃ nanoparticles and graphene in order to improve electrical conductivity, and (3) interconnected nanoporous structures in order to allow easy access of Na⁺ ions to NaTi₂(PO₄)₃. For this, the NaTi₂(PO₄)₃/rGO microsphere composite was prepared via a facile spray drying method using a solution mixture of graphene oxide, NaH₂PO₄·2H₂O, Ti(OC₂H₅)₄ and NH₄H₂(PO₄)₃, in which all the components of the titanium were present as ionic species in order to facilitate the chemical bonding between NaTi₂(PO₄)₃ and rGO in the composite. The NaTi₂(PO₄)₃/rGO microsphere composite had a Ti-O-C bond between NaTi₂(PO₄)₃ nanoparticles (<80 nm) and rGO and interconnected nanoporous structures. The NaTi₂(PO₄)₃/rGO microsphere composite exhibited a near theoretical specific capacity of 133 mA h g^-1 at a 0.1 C-rate and excellent rate capability (70% capacity retention at a 50 C-rate) with very stable cycling performance (only 2% capacity loss after 200 cycles at a high rate of 10C). Furthermore, the energy density and power density of the NHC assembled with a NaTi₂(PO₄)₃/rGO anode and an AC-based cathode are far better than those of other NHCs assembled using other metal oxide-based anodes and AC cathodes.

Original language	English
Pages (from-to)	17506-17516
Number of pages	11
Journal	Journal of Materials Chemistry A
Volume	5
Issue number	33
DOIs	https://doi.org/10.1039/c7ta05252a
Publication status	Published - 2017

Bibliographical note

Publisher Copyright:
© 2017 The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

UN SDGs

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

Access to Document

10.1039/c7ta05252a

Cite this

@article{cd328390fc9a4a32afb3c1813b417e11,

title = "A chemically bonded NaTi2(PO4)3/rGO microsphere composite as a high-rate insertion anode for sodium-ion capacitors",

abstract = "We report on the synthesis of a high rate NaTi2(PO4)3/graphene composite for use as an anode material for high power Na-ion hybrid capacitors with the following characteristics; (1) reduction of the particle size of NaTi2(PO4)3 to the nanometer scale in order to reduce the Na+ ion diffusion length, (2) chemical bonding between NaTi2(PO4)3 nanoparticles and graphene in order to improve electrical conductivity, and (3) interconnected nanoporous structures in order to allow easy access of Na+ ions to NaTi2(PO4)3. For this, the NaTi2(PO4)3/rGO microsphere composite was prepared via a facile spray drying method using a solution mixture of graphene oxide, NaH2PO4·2H2O, Ti(OC2H5)4 and NH4H2(PO4)3, in which all the components of the titanium were present as ionic species in order to facilitate the chemical bonding between NaTi2(PO4)3 and rGO in the composite. The NaTi2(PO4)3/rGO microsphere composite had a Ti-O-C bond between NaTi2(PO4)3 nanoparticles (<80 nm) and rGO and interconnected nanoporous structures. The NaTi2(PO4)3/rGO microsphere composite exhibited a near theoretical specific capacity of 133 mA h g-1 at a 0.1 C-rate and excellent rate capability (70% capacity retention at a 50 C-rate) with very stable cycling performance (only 2% capacity loss after 200 cycles at a high rate of 10C). Furthermore, the energy density and power density of the NHC assembled with a NaTi2(PO4)3/rGO anode and an AC-based cathode are far better than those of other NHCs assembled using other metal oxide-based anodes and AC cathodes.",

author = "Roh, {Ha Kyung} and Kim, {Myeong Seong} and Chung, {Kyung Yoon} and Mani Ulaganathan and Vanchiappan Aravindan and Srinivasan Madhavi and Roh, {Kwang Chul} and Kim, {Kwang Bum}",

note = "Publisher Copyright: {\textcopyright} 2017 The Royal Society of Chemistry.",

year = "2017",

doi = "10.1039/c7ta05252a",

language = "English",

volume = "5",

pages = "17506--17516",

journal = "Journal of Materials Chemistry A",

issn = "2050-7488",

publisher = "Royal Society of Chemistry",

number = "33",

}

TY - JOUR

T1 - A chemically bonded NaTi2(PO4)3/rGO microsphere composite as a high-rate insertion anode for sodium-ion capacitors

AU - Roh, Ha Kyung

AU - Kim, Myeong Seong

AU - Chung, Kyung Yoon

AU - Ulaganathan, Mani

AU - Aravindan, Vanchiappan

AU - Madhavi, Srinivasan

AU - Roh, Kwang Chul

AU - Kim, Kwang Bum

PY - 2017

Y1 - 2017

N2 - We report on the synthesis of a high rate NaTi2(PO4)3/graphene composite for use as an anode material for high power Na-ion hybrid capacitors with the following characteristics; (1) reduction of the particle size of NaTi2(PO4)3 to the nanometer scale in order to reduce the Na+ ion diffusion length, (2) chemical bonding between NaTi2(PO4)3 nanoparticles and graphene in order to improve electrical conductivity, and (3) interconnected nanoporous structures in order to allow easy access of Na+ ions to NaTi2(PO4)3. For this, the NaTi2(PO4)3/rGO microsphere composite was prepared via a facile spray drying method using a solution mixture of graphene oxide, NaH2PO4·2H2O, Ti(OC2H5)4 and NH4H2(PO4)3, in which all the components of the titanium were present as ionic species in order to facilitate the chemical bonding between NaTi2(PO4)3 and rGO in the composite. The NaTi2(PO4)3/rGO microsphere composite had a Ti-O-C bond between NaTi2(PO4)3 nanoparticles (<80 nm) and rGO and interconnected nanoporous structures. The NaTi2(PO4)3/rGO microsphere composite exhibited a near theoretical specific capacity of 133 mA h g-1 at a 0.1 C-rate and excellent rate capability (70% capacity retention at a 50 C-rate) with very stable cycling performance (only 2% capacity loss after 200 cycles at a high rate of 10C). Furthermore, the energy density and power density of the NHC assembled with a NaTi2(PO4)3/rGO anode and an AC-based cathode are far better than those of other NHCs assembled using other metal oxide-based anodes and AC cathodes.

AB - We report on the synthesis of a high rate NaTi2(PO4)3/graphene composite for use as an anode material for high power Na-ion hybrid capacitors with the following characteristics; (1) reduction of the particle size of NaTi2(PO4)3 to the nanometer scale in order to reduce the Na+ ion diffusion length, (2) chemical bonding between NaTi2(PO4)3 nanoparticles and graphene in order to improve electrical conductivity, and (3) interconnected nanoporous structures in order to allow easy access of Na+ ions to NaTi2(PO4)3. For this, the NaTi2(PO4)3/rGO microsphere composite was prepared via a facile spray drying method using a solution mixture of graphene oxide, NaH2PO4·2H2O, Ti(OC2H5)4 and NH4H2(PO4)3, in which all the components of the titanium were present as ionic species in order to facilitate the chemical bonding between NaTi2(PO4)3 and rGO in the composite. The NaTi2(PO4)3/rGO microsphere composite had a Ti-O-C bond between NaTi2(PO4)3 nanoparticles (<80 nm) and rGO and interconnected nanoporous structures. The NaTi2(PO4)3/rGO microsphere composite exhibited a near theoretical specific capacity of 133 mA h g-1 at a 0.1 C-rate and excellent rate capability (70% capacity retention at a 50 C-rate) with very stable cycling performance (only 2% capacity loss after 200 cycles at a high rate of 10C). Furthermore, the energy density and power density of the NHC assembled with a NaTi2(PO4)3/rGO anode and an AC-based cathode are far better than those of other NHCs assembled using other metal oxide-based anodes and AC cathodes.

UR - http://www.scopus.com/inward/record.url?scp=85028316637&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85028316637&partnerID=8YFLogxK

U2 - 10.1039/c7ta05252a

DO - 10.1039/c7ta05252a

M3 - Article

AN - SCOPUS:85028316637

SN - 2050-7488

VL - 5

SP - 17506

EP - 17516

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 33

ER -