In situ synthesis of chemically bonded NaTi2(PO4)3/rGO 2D nanocomposite for high-rate sodium-ion batteries

Ha Kyung Roh; Hyun Kyung Kim; Myeong Seong Kim; Dong Hyun Kim; Kyung Yoon Chung; Kwang Chul Roh; Kwang Bum Kim

doi:10.1007/s12274-016-1077-y

In situ synthesis of chemically bonded NaTi₂(PO₄)₃/rGO 2D nanocomposite for high-rate sodium-ion batteries

Ha Kyung Roh, Hyun Kyung Kim, Myeong Seong Kim, Dong Hyun Kim, Kyung Yoon Chung, Kwang Chul Roh, Kwang Bum Kim

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

59 Citations (Scopus)

Abstract

A phase-pure NaTi₂(PO₄)₃/reduced graphene oxide (rGO) nanocomposite was prepared using a microwave-assisted one-pot method and subsequent heat treatment. The well-crystallized NaTi₂(PO₄)₃ nanoparticles (30–40 nm) were uniformly precipitated on rGO templates through Ti–O–C bonds. The chemical interactions between the NaTi₂(PO₄)₃ nanoparticles and rGO could immobilize the NaTi₂(PO₄)₃ nanoparticles on the rGO sheets, which might be responsible for the excellent electrochemical performance of the nanocomposite. The NaTi₂(PO₄)₃/rGO nanocomposite exhibited a specific capacity of 128.6 mA·h·g^–1 approaching the theoretical value at a 0.1 C-rate with an excellent rate capability (72.9% capacity retention at 50 C-rate) and cycling performance (only 4.5% capacity loss after 1,000 cycles at a high rate of 10 C). These properties were maintained even when the electrodes were prepared without the use of an additional conducting agent. The excellent sodium storage properties of the NaTi₂(PO₄)₃/rGO nanocomposite could be attributed to the nano-sized NaTi₂(PO₄)₃ particles, which significantly reduced the transport lengths for Na+ ions, and an intimate contact between the NaTi₂(PO₄)₃ particles and rGO due to chemical bonding. [Figure not available: see fulltext.]

Original language	English
Pages (from-to)	1844-1855
Number of pages	12
Journal	Nano Research
Volume	9
Issue number	6
DOIs	https://doi.org/10.1007/s12274-016-1077-y
Publication status	Published - 2016 Jun 1

Bibliographical note

Publisher Copyright:
© 2016, Tsinghua University Press and Springer-Verlag Berlin Heidelberg.

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Materials Science(all)
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1007/s12274-016-1077-y

Cite this

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title = "In situ synthesis of chemically bonded NaTi2(PO4)3/rGO 2D nanocomposite for high-rate sodium-ion batteries",

abstract = "A phase-pure NaTi2(PO4)3/reduced graphene oxide (rGO) nanocomposite was prepared using a microwave-assisted one-pot method and subsequent heat treatment. The well-crystallized NaTi2(PO4)3 nanoparticles (30–40 nm) were uniformly precipitated on rGO templates through Ti–O–C bonds. The chemical interactions between the NaTi2(PO4)3 nanoparticles and rGO could immobilize the NaTi2(PO4)3 nanoparticles on the rGO sheets, which might be responsible for the excellent electrochemical performance of the nanocomposite. The NaTi2(PO4)3/rGO nanocomposite exhibited a specific capacity of 128.6 mA·h·g–1 approaching the theoretical value at a 0.1 C-rate with an excellent rate capability (72.9% capacity retention at 50 C-rate) and cycling performance (only 4.5% capacity loss after 1,000 cycles at a high rate of 10 C). These properties were maintained even when the electrodes were prepared without the use of an additional conducting agent. The excellent sodium storage properties of the NaTi2(PO4)3/rGO nanocomposite could be attributed to the nano-sized NaTi2(PO4)3 particles, which significantly reduced the transport lengths for Na+ ions, and an intimate contact between the NaTi2(PO4)3 particles and rGO due to chemical bonding. [Figure not available: see fulltext.]",

author = "Roh, {Ha Kyung} and Kim, {Hyun Kyung} and Kim, {Myeong Seong} and Kim, {Dong Hyun} and Chung, {Kyung Yoon} and Roh, {Kwang Chul} and Kim, {Kwang Bum}",

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T1 - In situ synthesis of chemically bonded NaTi2(PO4)3/rGO 2D nanocomposite for high-rate sodium-ion batteries

AU - Roh, Ha Kyung

AU - Kim, Hyun Kyung

AU - Kim, Myeong Seong

AU - Kim, Dong Hyun

AU - Chung, Kyung Yoon

AU - Roh, Kwang Chul

AU - Kim, Kwang Bum

PY - 2016/6/1

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N2 - A phase-pure NaTi2(PO4)3/reduced graphene oxide (rGO) nanocomposite was prepared using a microwave-assisted one-pot method and subsequent heat treatment. The well-crystallized NaTi2(PO4)3 nanoparticles (30–40 nm) were uniformly precipitated on rGO templates through Ti–O–C bonds. The chemical interactions between the NaTi2(PO4)3 nanoparticles and rGO could immobilize the NaTi2(PO4)3 nanoparticles on the rGO sheets, which might be responsible for the excellent electrochemical performance of the nanocomposite. The NaTi2(PO4)3/rGO nanocomposite exhibited a specific capacity of 128.6 mA·h·g–1 approaching the theoretical value at a 0.1 C-rate with an excellent rate capability (72.9% capacity retention at 50 C-rate) and cycling performance (only 4.5% capacity loss after 1,000 cycles at a high rate of 10 C). These properties were maintained even when the electrodes were prepared without the use of an additional conducting agent. The excellent sodium storage properties of the NaTi2(PO4)3/rGO nanocomposite could be attributed to the nano-sized NaTi2(PO4)3 particles, which significantly reduced the transport lengths for Na+ ions, and an intimate contact between the NaTi2(PO4)3 particles and rGO due to chemical bonding. [Figure not available: see fulltext.]

AB - A phase-pure NaTi2(PO4)3/reduced graphene oxide (rGO) nanocomposite was prepared using a microwave-assisted one-pot method and subsequent heat treatment. The well-crystallized NaTi2(PO4)3 nanoparticles (30–40 nm) were uniformly precipitated on rGO templates through Ti–O–C bonds. The chemical interactions between the NaTi2(PO4)3 nanoparticles and rGO could immobilize the NaTi2(PO4)3 nanoparticles on the rGO sheets, which might be responsible for the excellent electrochemical performance of the nanocomposite. The NaTi2(PO4)3/rGO nanocomposite exhibited a specific capacity of 128.6 mA·h·g–1 approaching the theoretical value at a 0.1 C-rate with an excellent rate capability (72.9% capacity retention at 50 C-rate) and cycling performance (only 4.5% capacity loss after 1,000 cycles at a high rate of 10 C). These properties were maintained even when the electrodes were prepared without the use of an additional conducting agent. The excellent sodium storage properties of the NaTi2(PO4)3/rGO nanocomposite could be attributed to the nano-sized NaTi2(PO4)3 particles, which significantly reduced the transport lengths for Na+ ions, and an intimate contact between the NaTi2(PO4)3 particles and rGO due to chemical bonding. [Figure not available: see fulltext.]

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