TiO2 nanotube branched tree on a carbon nanofiber nanostructure as an anode for high energy and power lithium ion batteries

Taeseup Song; Hyungkyu Han; Heechae Choi; Jung Woo Lee; Hyunjung Park; Sangkyu Lee; Won Il Park; Seungchul Kim; Li Liu; Ungyu Paik

doi:10.1007/s12274-014-0415-1

TiO₂ nanotube branched tree on a carbon nanofiber nanostructure as an anode for high energy and power lithium ion batteries

Taeseup Song, Hyungkyu Han, Heechae Choi, Jung Woo Lee, Hyunjung Park, Sangkyu Lee, Won Il Park, Seungchul Kim, Li Liu, Ungyu Paik^*

^*Corresponding author for this work

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

43 Citations (Scopus)

Abstract

The inherently low electrical conductivity of TiO₂-based electrodes as well as the high electrical resistance between an electrode and a current collector represents a major obstacle to their use as an anode for lithium ion batteries. In this study, we report on high-density TiO₂ nanotubes (NTs) branched onto a carbon nanofiber (CNF) "tree" that provide a low resistance current path between the current collector and the TiO₂ NTs. Compared to a TiO₂ NT array grown directly on the current collector, the branched TiO₂ NTs tree, coupled with the CNF electrode, exhibited ∼10 times higher areal energy density and excellent rate capability (discharge capacity of ∼150 mA·h·g^-1 at a current density of 1,000 mA·g^-1). Based on the detailed experimental results and associated theoretical analysis, we demonstrate that the introduction of CNFs with direct electric contact with the current collector enables a significant increase in areal capacity (mA·h·cm^-2) as well as excellent rate capability. [Figure not available: see fulltext.]

Original language	English
Pages (from-to)	491-501
Number of pages	11
Journal	Nano Research
Volume	7
Issue number	4
DOIs	https://doi.org/10.1007/s12274-014-0415-1
Publication status	Published - Apr 2014
Externally published	Yes

Keywords

areal capacity
carbon nanofibers
lithium ion batteries
titanium dioxide

UN SDGs

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

Access to Document

10.1007/s12274-014-0415-1

Cite this

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title = "TiO2 nanotube branched tree on a carbon nanofiber nanostructure as an anode for high energy and power lithium ion batteries",

abstract = "The inherently low electrical conductivity of TiO2-based electrodes as well as the high electrical resistance between an electrode and a current collector represents a major obstacle to their use as an anode for lithium ion batteries. In this study, we report on high-density TiO2 nanotubes (NTs) branched onto a carbon nanofiber (CNF) {"}tree{"} that provide a low resistance current path between the current collector and the TiO2 NTs. Compared to a TiO2 NT array grown directly on the current collector, the branched TiO2 NTs tree, coupled with the CNF electrode, exhibited ∼10 times higher areal energy density and excellent rate capability (discharge capacity of ∼150 mA·h·g-1 at a current density of 1,000 mA·g-1). Based on the detailed experimental results and associated theoretical analysis, we demonstrate that the introduction of CNFs with direct electric contact with the current collector enables a significant increase in areal capacity (mA·h·cm-2) as well as excellent rate capability. [Figure not available: see fulltext.]",

keywords = "areal capacity, carbon nanofibers, lithium ion batteries, titanium dioxide",

author = "Taeseup Song and Hyungkyu Han and Heechae Choi and Lee, {Jung Woo} and Hyunjung Park and Sangkyu Lee and Park, {Won Il} and Seungchul Kim and Li Liu and Ungyu Paik",

note = "Funding Information: We would like to thank Prof. Nazar for helpful discussions. This work was financially supported by the National Research Foundation of Korea (NRF) through Grant No. K207040000037A050000310, the Global Research Laboratory (GRL) Program provided by the Korean Ministry of Education, Science and Technology (MEST) in 2011, the International Cooperation program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (Grant No. 2011T100100369), and the Industrial Strategic Technology Development Program (Grant No. 10041589) funded by the Korea Ministry of Knowledge Economy.",

year = "2014",

month = apr,

doi = "10.1007/s12274-014-0415-1",

language = "English",

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T1 - TiO2 nanotube branched tree on a carbon nanofiber nanostructure as an anode for high energy and power lithium ion batteries

AU - Song, Taeseup

AU - Han, Hyungkyu

AU - Choi, Heechae

AU - Lee, Jung Woo

AU - Park, Hyunjung

AU - Lee, Sangkyu

AU - Park, Won Il

AU - Kim, Seungchul

AU - Liu, Li

AU - Paik, Ungyu

N1 - Funding Information: We would like to thank Prof. Nazar for helpful discussions. This work was financially supported by the National Research Foundation of Korea (NRF) through Grant No. K207040000037A050000310, the Global Research Laboratory (GRL) Program provided by the Korean Ministry of Education, Science and Technology (MEST) in 2011, the International Cooperation program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (Grant No. 2011T100100369), and the Industrial Strategic Technology Development Program (Grant No. 10041589) funded by the Korea Ministry of Knowledge Economy.

PY - 2014/4

Y1 - 2014/4

N2 - The inherently low electrical conductivity of TiO2-based electrodes as well as the high electrical resistance between an electrode and a current collector represents a major obstacle to their use as an anode for lithium ion batteries. In this study, we report on high-density TiO2 nanotubes (NTs) branched onto a carbon nanofiber (CNF) "tree" that provide a low resistance current path between the current collector and the TiO2 NTs. Compared to a TiO2 NT array grown directly on the current collector, the branched TiO2 NTs tree, coupled with the CNF electrode, exhibited ∼10 times higher areal energy density and excellent rate capability (discharge capacity of ∼150 mA·h·g-1 at a current density of 1,000 mA·g-1). Based on the detailed experimental results and associated theoretical analysis, we demonstrate that the introduction of CNFs with direct electric contact with the current collector enables a significant increase in areal capacity (mA·h·cm-2) as well as excellent rate capability. [Figure not available: see fulltext.]

AB - The inherently low electrical conductivity of TiO2-based electrodes as well as the high electrical resistance between an electrode and a current collector represents a major obstacle to their use as an anode for lithium ion batteries. In this study, we report on high-density TiO2 nanotubes (NTs) branched onto a carbon nanofiber (CNF) "tree" that provide a low resistance current path between the current collector and the TiO2 NTs. Compared to a TiO2 NT array grown directly on the current collector, the branched TiO2 NTs tree, coupled with the CNF electrode, exhibited ∼10 times higher areal energy density and excellent rate capability (discharge capacity of ∼150 mA·h·g-1 at a current density of 1,000 mA·g-1). Based on the detailed experimental results and associated theoretical analysis, we demonstrate that the introduction of CNFs with direct electric contact with the current collector enables a significant increase in areal capacity (mA·h·cm-2) as well as excellent rate capability. [Figure not available: see fulltext.]

KW - areal capacity

KW - carbon nanofibers

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